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Wang P, Chen R, Jia Y, Xu Y, Bai S, Li H, Li J. Cu-chelated polydopamine nanozymes with laccase-like activity for photothermal catalytic degradation of dyes. J Colloid Interface Sci 2024; 669:712-722. [PMID: 38735253 DOI: 10.1016/j.jcis.2024.04.124] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2024] [Revised: 04/12/2024] [Accepted: 04/17/2024] [Indexed: 05/14/2024]
Abstract
The industrial applications of enzymes are usually hindered by the high production cost, intricate reusability, and low stability in terms of thermal, pH, salt, and storage. Therefore, the de novo design of nanozymes that possess the enzyme mimicking biocatalytic functions sheds new light on this field. Here, we propose a facile one-pot synthesis approach to construct Cu-chelated polydopamine nanozymes (PDA-Cu NPs) that can not only catalyze the chromogenic reaction of 2,4-dichlorophenol (2,4-DP) and 4-aminoantipyrine (4-AP), but also present enhanced photothermal catalytic degradation for typical textile dyes. Compared with natural laccase, the designed mimic has higher affinity to the substrate of 2,4-DP with Km of 0.13 mM. Interestingly, PDA-Cu nanoparticles are stable under extreme conditions (temperature, ionic strength, storage), are reusable for 6 cycles with 97 % activity, and exhibit superior substrate universality. Furthermore, PDA-Cu nanozymes show a remarkable acceleration of the catalytic degradation of dyes, malachite green (MG) and methylene blue (MB), under near-infrared (NIR) laser irradiation. These findings offer a promising paradigm on developing novel nanozymes for biomedicine, catalysis, and environmental engineering.
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Affiliation(s)
- Peizhi Wang
- College of Chemistry and Chemical Engineering, Xi'an Shiyou University, Xi'an 710065, China
| | - Rong Chen
- College of Chemistry and Chemical Engineering, Xi'an Shiyou University, Xi'an 710065, China
| | - Yi Jia
- Beijing National Laboratory for Molecular Sciences, CAS Key Lab of Colloid, Interface and Chemical Thermodynamics, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China.
| | - Yang Xu
- Beijing National Laboratory for Molecular Sciences, CAS Key Lab of Colloid, Interface and Chemical Thermodynamics, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Shiwei Bai
- Beijing National Laboratory for Molecular Sciences, CAS Key Lab of Colloid, Interface and Chemical Thermodynamics, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Hong Li
- College of Chemistry and Chemical Engineering, Xi'an Shiyou University, Xi'an 710065, China; Xi'an Key Laboratory of Low-Carbon Utilization for High-Carbon Resources, Xi'an Shiyou University, Xi'an 710065, China.
| | - Junbai Li
- Beijing National Laboratory for Molecular Sciences, CAS Key Lab of Colloid, Interface and Chemical Thermodynamics, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China.
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2
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Gomase V, Rathi T, Saravanan D, Jugade R. Amputation of Remazol brilliant blue dye on crosslinked chitosan hydrogel: Statistical treatment and experimental evaluation. ENVIRONMENTAL RESEARCH 2024; 252:118764. [PMID: 38527722 DOI: 10.1016/j.envres.2024.118764] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/14/2024] [Revised: 03/16/2024] [Accepted: 03/19/2024] [Indexed: 03/27/2024]
Abstract
The primary aim of this research is to comprehensively assess the applicability of chitosan biopolymer towards water treatment application and to enhance its adsorption capacity towards Remazol brilliant blue R-19 dye. This has been achieved through physical modification to obtain the material in hydrogel form and chemical modification by crosslinking it with barbituric acid. The characterization of the resulting Chitosan-barbituric acid hydrogel (CBH) was carried out using various analytical techniques such as SEM-EDX, FT-IR, TGA-DTA, XRD, and BET. CBH was employed as the adsorbent to eliminate R-19 dye from aqueous media. Utilizing response surface methodology (RSM), the parameters were fine-tuned, leading to the achievement of more than a 95% removal for R-19 dye. The adsorption behavior closely adhered to the Langmuir isotherm and pseudo-second-order kinetics. An interesting observation indicated that the rise in temperature leads to rise in adsorption capacity of CBH. The maximum adsorption capacities evaluated at 301.15 K, 313.15 K, 318.15 K, and 323.15 K were 566.6 mg g-1, 624.7 mg g-1, 671.3 mg g-1, and 713.5 mg g-1 respectively, in accordance with the Langmuir isotherm model. Examining the thermodynamics of the adsorption process revealed its spontaneous nature (ΔG = -21.14 to -27.09 kJ mol-1) across the entire temperature range. Furthermore, the assessment of the isosteric heat of adsorption (ΔHads) was conducted using the Clausius-Clapeyron equation, with results indicating an increase in ΔHads from 1.85 to 2.16 kJ mol-1 with temperature rise from 301.15 K to 323.15 K due to augmented surface loading. This suggested the existence of lateral interactions between the adsorbed dye molecules. The potential of adsorbent for regeneration was investigated, demonstrating the ability to reuse the material. Sustainability parameter calculated for synthesis process reflected a notably low E-factor value of 0.32 demonstrated the synthesis is environment friendly.
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Affiliation(s)
- Vaishnavi Gomase
- Department of Chemistry, R.T.M. Nagpur University, Nagpur, 440033, India.
| | - Tejaswini Rathi
- Department of Chemistry, R.T.M. Nagpur University, Nagpur, 440033, India
| | - D Saravanan
- Department of Chemistry, National College, Tiruchirappalli, Tamilnadu, 620001, India
| | - Ravin Jugade
- Department of Chemistry, R.T.M. Nagpur University, Nagpur, 440033, India.
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3
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Geçgel C, Yabalak E, Turabik M. Simultaneous synthesis of super-paramagnetic hydrochar in a one-pot using subcritical water medium and evaluation of its photocatalytic activity. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2024; 362:121333. [PMID: 38833925 DOI: 10.1016/j.jenvman.2024.121333] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/16/2024] [Revised: 04/23/2024] [Accepted: 05/30/2024] [Indexed: 06/06/2024]
Abstract
The unregulated release of chemical dyes into the environment presents considerable environmental hazards when left untreated. Photocatalytic degradation, acknowledged as an eco-friendly and cost-effective method, has garnered attention for its efficacy in eliminating organic pollutants like dye. Consequently, the development of multifunctional materials with different applications in environmental and catalytic fields emerges as a promising avenue. Recognizing the significance of integrating catalysts and porous materials for enhancing interactions between pollutants and photo-sensitive substances, magnetic hydrochar emerges as a solution offering heightened efficiency, scalability, recyclability, and broad applicability in various environmental processes, notably wastewater treatment, due to its facile separation capability. In this study, Fe3O4-based, super-paramagnetic hydrochar (SMHC) was simultaneously synthesized in a single step using a coconut shell in the subcritical water medium. A thorough analysis was conducted on both raw hydrochar (RHC) and SMHC to unravel the mechanism of interaction between Fe3O4 nanoparticles and the hydrochar matrix. The synthesized hydrochar exhibited super-paramagnetic characteristics, with a saturation magnetization of 23.7 emu/g and a magnetic hysteresis loop. SMHC displayed a BET surface area of 42.6 m2/g and an average pore size of 26.3 nm, indicating a mesoporous structure according to nitrogen adsorption-desorption isotherms. XRD analysis revealed magnetic crystal sizes in the obtained SMHC to be 13.7 nm. The photocatalytic performance of SMHC was evaluated under visible light exposure in the presence of H2O2 for Astrazon yellow (AY) dye degradation, with optimization conducted using response surface methodology (RSM). The most substantial dye removal, reaching 92.83%, was achieved with 0.4% H2O2 at a 20 mg/L dye concentration and an 80-min reaction duration.
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Affiliation(s)
- Cihan Geçgel
- Advanced Technology Education Research and Application Center, Mersin University, 33343, Mersin, Turkey
| | - Erdal Yabalak
- Department of Chemistry and Chemical Processing Technologies, Technical Science Vocational School, Mersin University, 33343, Mersin, Turkey; Department of Nanotechnology and Advanced Materials, Mersin University, TR-33343, Mersin, Turkey.
| | - Meral Turabik
- Department of Chemistry and Chemical Processing Technologies, Technical Science Vocational School, Mersin University, 33343, Mersin, Turkey; Department of Nanotechnology and Advanced Materials, Mersin University, TR-33343, Mersin, Turkey
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4
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Yılmazoğlu M, Kanmaz N, Demircivi P. Constructing the synergistic effects of chitosan and ionic liquid on SPEEK polymer for efficient adsorption of crystal violet dye. Int J Biol Macromol 2024; 271:132638. [PMID: 38797296 DOI: 10.1016/j.ijbiomac.2024.132638] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2024] [Revised: 05/15/2024] [Accepted: 05/23/2024] [Indexed: 05/29/2024]
Abstract
In the study, a novel chitosan biopolymer and 1-ethyl-3-methylimidazolium tetrafluoroborate ionic liquid (IL)-incorporated sulfonated poly (ether ether ketone) (SPEEK) composite (Ch-IL@SPEEK) was prepared for adsorption of cationic crystal violet (CV) dye. The proposed composite was well characterized by several techniques. CV adsorption performance was examined via batch studies by varying various variables involving adsorbent dosage, contact time pH and temperature. The isotherm results were demonstrated the adsorption characters of the processes were Langmuirian. The maximum adsorption capacity was determined as 77.66 mg g-1 for the composite which was significantly higher than SPEEK (qmax = 45.36 mg g-1). The determined equilibrium time of the operated system was 360 min and the kinetic model was assessed as Elovich. At low pHs the protonated surface groups repelled the positively charged CV and the adsorption rate increased with increasing pH. The process is spontaneous and favorable as it proceeds via endothermic interactions. Furthermore, even at the end of 5 successful adsorption cycles, 77.86 % CV removal was obtained. Remarkable efficiencies were also achieved in the removal performance of different organic pollutants. Based on the reported results, Ch-IL@SPEEK composite were exhibited as an impressive adsorbent material for adsorption processes.
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Affiliation(s)
- Mesut Yılmazoğlu
- Yalova University, Faculty of Engineering, Chemical Engineering Department, 77200 Yalova, Turkey
| | - Nergiz Kanmaz
- Yalova University, Faculty of Engineering, Chemical Engineering Department, 77200 Yalova, Turkey.
| | - Pelin Demircivi
- Yalova University, Faculty of Engineering, Chemical Engineering Department, 77200 Yalova, Turkey
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5
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Deori N, Paul S, Lahkar S, Brahma S. Ultrasonic-Assisted Nitrate Anion Incorporation in Triaminoguanidium Chloride Based Covalent Organic Polymer for Methylene Blue Dye Adsorption. Chem Asian J 2024; 19:e202400046. [PMID: 38533850 DOI: 10.1002/asia.202400046] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2024] [Revised: 03/25/2024] [Accepted: 03/25/2024] [Indexed: 03/28/2024]
Abstract
Terephthalaldehyde-triaminoguanidium chloride covalent organic polymer, Te-TGCl COP can facilely be incorporated with NaNO3 by sonication. Te-TGCl COP incorporated with NaNO3 via ultrasonication adsorbs Methylene Blue (MB) dye. Te-TGCl COP alone shows negligible adsorption capacity for MB, however, when treated with NaNO3, its adsorption capacity emerges slightly. Moreover, ultrasonication of the NaNO3 treated COP, Te-TG-NaNO3 COP shows dramatic increase in its adsorption capacity for MB (qe for Te-TGCl COP ≈0 mg g-1; for Te-TG-NaNO3=17.65 mg g-1). Emergence of MB dye adsorption property in Te-TG-NaNO3 COP composite may be attributed primarily to the electrostatic interaction of MB dye molecules with nitrate anions and the sonochemical effect caused fibrous morphological structure of the adsorbent material. The kinetics of MB dye adsorption onto Te-TG-NaNO3 COP composite exhibits an excellent fit for the pseudo-second order model, suggesting the rate-determining step to be chemisorption. Homogeneous monolayer adsorption of MB dye onto Te-TG-NaNO3 COP composite can be suggested as the Langmuir isotherm model seemed to be fitted well.
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Affiliation(s)
| | - Saurav Paul
- Department of Chemistry, Gauhati University, Guwahati, Assam, India
| | - Surabhi Lahkar
- Department of Chemistry, Gauhati University, Guwahati, Assam, India
| | - Sanfaori Brahma
- Department of Chemistry, Gauhati University, Guwahati, Assam, India
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6
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Li D, Sun L, Yang L, Liu J, Shi L, Zhuo L, Ye T, Wang S. Adsorption behavior and mechanism of modified Pinus massoniana pollen microcarriers for extremely efficient and rapid adsorption of cationic methylene blue dye. JOURNAL OF HAZARDOUS MATERIALS 2024; 465:133308. [PMID: 38134687 DOI: 10.1016/j.jhazmat.2023.133308] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/07/2023] [Revised: 11/22/2023] [Accepted: 12/16/2023] [Indexed: 12/24/2023]
Abstract
Herein, a novel biosorbent was successfully fabricated through a two-step process employing Pinus massoniana pollen as raw material. The efficacy of this biosorbent in eliminating methylene blue (MB), a typical organic cationic dye, from highly concentrated industrial wastewater was investigated. The results demonstrated that by adjusting the wettability of pollen microcarriers, it is possible to significantly increase their adsorption capacity for cationic dyes, resulting in a remarkable 25-fold improvement. The modified Pinus massoniana pollen microcarriers (MPPMC) exhibited an optimal adsorption capacity (585 mg/g) under specific conditions and a rapid equilibrium (97.6% in 5 min, uptake 487.8 mg/g) even at room temperature, showing excellent performance in removing MB efficiently and quickly. It is worth noting that the modified microcarriers could be regenerated via a simple pH-controlled adsorption-desorption cycle, maintaining their superior efficiency (> 99%) even after undergoing five cycles, indicating their excellent reproducibility. The MB adsorption process on MPPMC obeyed the pseudo-second-order kinetic model and followed the Langmuir model. Through the introduced modifications, the substantial deprotonation of carboxyl groups notably augmented electrostatic and hydrogen bonding interactions between MPPMC and MB. Overall, this study offers a sustainable, eco-friendly biological adsorbent, and the MPPMC exhibit the considerable potential for efficient and rapid removal of organic cationic dyes in wastewater.
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Affiliation(s)
- Dan Li
- Shenyang Pharmaceutical University, 103 Wenhua Road, Shenyang 110016, China; Shenyang Junhong Medical Technology Co., Ltd., 59 Changjiang Street, Shenyang 110030, China
| | - Liwen Sun
- Shenyang Pharmaceutical University, 103 Wenhua Road, Shenyang 110016, China
| | - Li Yang
- Shenyang Pharmaceutical University, 103 Wenhua Road, Shenyang 110016, China
| | - Jun Liu
- Shenyang Pharmaceutical University, 103 Wenhua Road, Shenyang 110016, China
| | - Lingjuan Shi
- Shenyang Pharmaceutical University, 103 Wenhua Road, Shenyang 110016, China
| | - Le Zhuo
- Shenyang Pharmaceutical University, 103 Wenhua Road, Shenyang 110016, China
| | - Tiantian Ye
- Shenyang Pharmaceutical University, 103 Wenhua Road, Shenyang 110016, China.
| | - Shujun Wang
- Shenyang Pharmaceutical University, 103 Wenhua Road, Shenyang 110016, China.
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7
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Joshi B, Khalil AM, Zhang S, Memon FA, Yang Z. Application of 2D MoS 2 Nanoflower for the Removal of Emerging Pollutants from Water. ACS ENGINEERING AU 2023; 3:461-476. [PMID: 38144680 PMCID: PMC10739627 DOI: 10.1021/acsengineeringau.3c00032] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/17/2023] [Revised: 09/20/2023] [Accepted: 09/22/2023] [Indexed: 12/26/2023]
Abstract
Two-dimensional (2D) nanomaterial-MoS2 (molybdenum disulfide) has gained interest among researchers, owing to its exceptional mechanical, biological, and physiochemical properties. This paper reports on the removal of organic dyes and an emerging contaminant, Ciprofloxacin, by a 2D MoS2 nanoflower as an adsorbent. The material was prepared by a green hydrothermal technique, and its high Brunauer-Emmett-Teller-specific area of 185.541m2/g contributed to the removal of 96% rhodamine-B dye and 85% Ciprofloxacin. Various characterizations, such as X-ray diffraction, scanning electron microscopy linked with energy-dispersive spectroscopy, and transmission electron microscopy, revealed the nanoflower structure with good crystallinity. The feasibility and efficacy of 2D MoS2 nanoflower as a promising adsorbent candidate for the removal of emerging pollutants was confirmed in-depth in batch investigations, such as the effects of adsorption time, MoS2 dosages, solution pH, and temperature. The adsorption mechanism was further investigated based on thermodynamic calculations, adsorption kinetics, and isotherm modeling. The results confirmed the exothermic nature of the enthalpy-driven adsorption as well as the fast kinetics and physisorption-controlled adsorption process. The recyclability potential of 2D MoS2 exceeds four regeneration recycles. MoS2 nanoflower has been shown to be an effective organic pollutant removal adsorbent in water treatment.
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Affiliation(s)
- Bhavya Joshi
- Faculty of Environment, Science
and Economy, University of Exeter, Exeter EX4 4QF, U.K.
| | - Ahmed M.E. Khalil
- Faculty of Environment, Science
and Economy, University of Exeter, Exeter EX4 4QF, U.K.
| | - Shaowei Zhang
- Faculty of Environment, Science
and Economy, University of Exeter, Exeter EX4 4QF, U.K.
| | - Fayyaz A. Memon
- Faculty of Environment, Science
and Economy, University of Exeter, Exeter EX4 4QF, U.K.
| | - Zhuxian Yang
- Faculty of Environment, Science
and Economy, University of Exeter, Exeter EX4 4QF, U.K.
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8
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Izghri Z, Ennaciri K, Enaime G, Sekkouri C, Yaacoubi FE, Chahid L, El Gaini L, Bacaoui A, Yaacoubi A. The ability of drinking water treatment sludge to degrade methylene blue in water through combined adsorption/photo Fenton-like process. JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH. PART A, TOXIC/HAZARDOUS SUBSTANCES & ENVIRONMENTAL ENGINEERING 2023; 58:981-990. [PMID: 37929700 DOI: 10.1080/10934529.2023.2277622] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/10/2023] [Accepted: 10/24/2023] [Indexed: 11/07/2023]
Abstract
In the present study, drinking water treatment sludge (DWTS) was reused as a catalyst in advanced oxidation processes for the removal of methylene blue (MB) from aqueous solutions. After determining their chemical and mineralogical compositions by X-ray Powder Diffraction (XRD), BET surface area, scanning electron microscopy with energy dispersive spectroscopy (SEM/EDS), Inductively Coupled Plasma (ICP), and FT-IR spectra. DWTS has been used as a heterogeneous photo Fenton-Like catalyst for the oxidation of MB under different parameters, including pH (3-6), H2O2 concentration (9.79-29.37 mM), and dose (1-2.5 g/L). The results showed that within 180 min and under UV light irradiation, more than 86% of MB having a concentration of 50 mg/L were removed using a catalyst loading of 1.5 g/L, a H2O2 dosage of 23.17 mM and a solution pH of 5. The DWTS has a satisfactory stability as the catalyst is stable and have very less iron leaching property.
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Affiliation(s)
- Zaina Izghri
- Laboratory of Applied Chemistry and biomass, Unity of Methodology and Environment, Faculty of Sciences Semlalia, Cadi Ayyad University, Marrakech, Morocco
| | - Karima Ennaciri
- Laboratory of Applied Chemistry and biomass, Unity of Methodology and Environment, Faculty of Sciences Semlalia, Cadi Ayyad University, Marrakech, Morocco
| | - Ghizlane Enaime
- Institute of Urban Water Management and Environmental Engineering, Ruhr-Universität Bochum, Bochum, Germany
| | - Chaima Sekkouri
- Laboratory of Applied Chemistry and biomass, Unity of Methodology and Environment, Faculty of Sciences Semlalia, Cadi Ayyad University, Marrakech, Morocco
| | - Fatima Ezzahra Yaacoubi
- Laboratory of Applied Chemistry and biomass, Unity of Methodology and Environment, Faculty of Sciences Semlalia, Cadi Ayyad University, Marrakech, Morocco
| | - Lhoussaine Chahid
- National Office of Electricity and Drinking Water (ONEE), Marrakech, Morocco
| | - Layla El Gaini
- Laboratory of Applied Chemistry and biomass, Unity of Methodology and Environment, Faculty of Sciences Semlalia, Cadi Ayyad University, Marrakech, Morocco
| | - Abdelaziz Bacaoui
- Laboratory of Applied Chemistry and biomass, Unity of Methodology and Environment, Faculty of Sciences Semlalia, Cadi Ayyad University, Marrakech, Morocco
| | - Abdelrani Yaacoubi
- Laboratory of Applied Chemistry and biomass, Unity of Methodology and Environment, Faculty of Sciences Semlalia, Cadi Ayyad University, Marrakech, Morocco
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9
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Stepanova A, Tite T, Ivanenko I, Enculescu M, Radu C, Culita DC, Rostas AM, Galca AC. TiO 2 Phase Ratio's Contribution to the Photocatalytic Activity. ACS OMEGA 2023; 8:41664-41673. [PMID: 37970036 PMCID: PMC10634250 DOI: 10.1021/acsomega.3c05890] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/10/2023] [Revised: 10/06/2023] [Accepted: 10/10/2023] [Indexed: 11/17/2023]
Abstract
Photocatalysis is one of the approaches for solving environmental issues derived from extremely harmful pollution caused by industrial dyes, medicine, and heavy metals. Titanium dioxide is among the most promising photocatalytic semiconductors; thus, in this work, TiO2 powders were prepared by a hydrothermal synthesis using titanium tetrachloride TiCl4 as a Ti source. The effect of the hydrochloric acid (HCl) concentration on TiO2 formation was analyzed, in which a thorough morpho-structural analysis was performed employing different analysis methods like XRD, Raman spectroscopy, SEM/TEM, and N2 physisorption. EPR spectroscopy was employed to characterize the paramagnetic defect centers and the photogeneration of reactive oxygen species. Photocatalytic properties were tested by photocatalytic degradation of the rhodamine B (RhB) dye under UV light irradiation and using a solar simulator. The pH value directly influenced the formation of the TiO2 phases; for less acidic conditions, the anatase phase of TiO2 crystallized, with a crystallite size of ≈9 nm. Promising results were observed for TiO2, which contained 76% rutile, showing a 96% degradation of RhB under the solar simulator and 91% under UV light after 90 min irradiation, and the best result showed that the sample with 67% of the anatase phase after 60 min irradiation under the solar simulator had a 99% degradation efficiency.
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Affiliation(s)
- Anna Stepanova
- National
Institute of Materials Physics, Magurele 077125, Romania
| | - Teddy Tite
- National
Institute of Materials Physics, Magurele 077125, Romania
| | - Iryna Ivanenko
- National
Technical University of Ukraine Igor Sikorsky Kyiv Polytechnic Institute, Kyiv 03056, Ukraine
| | - Monica Enculescu
- National
Institute of Materials Physics, Magurele 077125, Romania
| | - Cristian Radu
- National
Institute of Materials Physics, Magurele 077125, Romania
| | - Daniela Cristina Culita
- Institute
of Physical Chemistry Ilie Murgulescu, Romanian Academy, Bucharest 060021, Romania
| | - Arpad Mihai Rostas
- National
Institute of Isotopic and Molecular Technologies, Cluj-Napoca 400293, Romania
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10
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Ramezanzadeh S, Esmaeilzadeh F, Mowla D, Elhambakhsh A, Kanani M. Insight into the application of supercritical water oxidation for dichlorvos degradation: experimental and simulation aspects. ENVIRONMENTAL TECHNOLOGY 2023; 44:4113-4122. [PMID: 35587737 DOI: 10.1080/09593330.2022.2080000] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/19/2022] [Accepted: 04/05/2022] [Indexed: 06/15/2023]
Abstract
Dichlorvos or 2,2-dichlorovinyl dimethyl phosphate (DDVP) ( C 4 H 7 C l 2 O 4 P ) is a chlorinated organophosphorus pesticide, which is frequently detected in agricultural wastewater. Herein, a batch reactor was used to carry out the supercritical water oxidation (SCWO) of a synthetic wastewater containing dichlorvos as a very hazardous agricultural pollutant. To do so, the impact of four operating parameters including dichlorvos concentration (100-500 ppm), oxidant coefficient (0.7-2), temperature (300-500°C) and time (0-100 s) on dichlorvos removal was optimized by the response surface method (RSM). According to the obtained results, at optimal conditions (i.e. initial concentration of dichlorvos 107.5 ppm, oxidation ratio 1.9234, temperature 419.9°C and time 79.94 s), as an index for dichlorvos removal, the chemical oxygen demand (COD) was found to be about 96.34%. Also, the results of high-performance liquid chromatography test showed that dichloroacetaldehyde (C2CL2H2O) and dichloroacetic acid (C2CL2H2O2) were created as intermediate substances during the dichlorvos degradation. Further, the molecular dynamics simulation was performed using ReaxFF force field to show the reaction path and products obtained in each step of the dichlorvos removal. Finally, as an indication, the simulation results indicated a good coordination with the experimental results.
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Affiliation(s)
- Shiva Ramezanzadeh
- Department of Chemical and Petroleum Engineering, School of Chemical and Petroleum Engineering, Enhanced Oil and Gas Recovery Institute, Advanced Research Group for Gas Condensate Recovery, Shiraz University, Shiraz, Iran
| | - Feridun Esmaeilzadeh
- Department of Chemical and Petroleum Engineering, School of Chemical and Petroleum Engineering, Enhanced Oil and Gas Recovery Institute, Advanced Research Group for Gas Condensate Recovery, Shiraz University, Shiraz, Iran
| | - Dariush Mowla
- Department of Chemical and Petroleum Engineering, School of Chemical and Petroleum Engineering, Enhanced Oil and Gas Recovery Institute, Advanced Research Group for Gas Condensate Recovery, Shiraz University, Shiraz, Iran
| | - Abbas Elhambakhsh
- Department of Chemical and Petroleum Engineering, School of Chemical and Petroleum Engineering, Enhanced Oil and Gas Recovery Institute, Advanced Research Group for Gas Condensate Recovery, Shiraz University, Shiraz, Iran
| | - Mansour Kanani
- Department of Materials Science and Engineering, School of Engineering, Shiraz University, Shiraz, Iran
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11
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Siaw Paw JK, Kiong TS, Kamarulzaman MK, Adam A, Hisham S, Kadirgama K, Ramasamy D, Yaw CT, Yusop AF, Yusaf T, A. Dhahad H, Benedict F. Advancing renewable fuel integration: A comprehensive response surface methodology approach for internal combustion engine performance and emissions optimization. Heliyon 2023; 9:e22238. [PMID: 38058613 PMCID: PMC10695989 DOI: 10.1016/j.heliyon.2023.e22238] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2023] [Revised: 10/24/2023] [Accepted: 11/07/2023] [Indexed: 12/08/2023] Open
Abstract
In the realm of internal combustion engines, there is a growing utilization of alternative renewable fuels as substitutes for traditional diesel and gasoline. This surge in demand is driven by the imperative to diminish fuel consumption and adhere to stringent regulations concerning engine emissions. Sole reliance on experimental analysis is inadequate to effectively address combustion, performance, and emission issues in engines. Consequently, the integration of engine modelling, grounded in machine learning methodologies and statistical data through the response surface method (RSM), has become increasingly significant for enhanced analytical outcomes. This study aims to explore the contemporary applications of RSM in assessing the feasibility of a wide range of renewable alternative fuels for internal combustion engines. Initially, the study outlines the fundamental principles and procedural steps of RSM, offering readers an introduction to this multifaceted statistical technique. Subsequently, the study delves into a comprehensive examination of the recent applications of alternative renewable fuels, focusing on their impact on combustion, performance, and emissions in the domain of internal combustion engines. Furthermore, the study sheds light on the advantages and limitations of employing RSM, and discusses the potential of combining RSM with other modelling techniques to optimise results. The overarching objective is to provide a thorough insight into the role and efficacy of RSM in the evaluation of renewable alternative fuels, thereby contributing to the ongoing discourse in the field of internal combustion engines.
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Affiliation(s)
- Johnny Koh Siaw Paw
- Institute of Sustainable Energy, University Tenaga Nasional, Putrajaya Campus, 43000 Kajang, Malaysia
| | - Tiong Sieh Kiong
- Institute of Sustainable Energy, University Tenaga Nasional, Putrajaya Campus, 43000 Kajang, Malaysia
| | - Mohd Kamal Kamarulzaman
- Advanced Nano Coolant-Lubricant (ANCL) Lab, Automotive Engineering Centre, Universiti Malaysia Pahang, Pekan 26600, Pahang, Malaysia
| | - Abdullah Adam
- Faculty of Mechanical and Automotive Engineering Technology, Universiti Malaysia Pahang, Pekan 26600, Pahang, Malaysia
| | - Sakinah Hisham
- Advanced Nano Coolant-Lubricant (ANCL) Lab, Automotive Engineering Centre, Universiti Malaysia Pahang, Pekan 26600, Pahang, Malaysia
| | - K. Kadirgama
- Advanced Nano Coolant-Lubricant (ANCL) Lab, Automotive Engineering Centre, Universiti Malaysia Pahang, Pekan 26600, Pahang, Malaysia
- Faculty of Mechanical and Automotive Engineering Technology, Universiti Malaysia Pahang, Pekan 26600, Pahang, Malaysia
- Department of Civil Engineering, College of Engineering, Almaaqal University, Basra, 61003, Iraq
| | - D. Ramasamy
- Advanced Nano Coolant-Lubricant (ANCL) Lab, Automotive Engineering Centre, Universiti Malaysia Pahang, Pekan 26600, Pahang, Malaysia
| | - Chong Tak Yaw
- Institute of Sustainable Energy, University Tenaga Nasional, Putrajaya Campus, 43000 Kajang, Malaysia
| | - Ahmad Fitri Yusop
- Advanced Nano Coolant-Lubricant (ANCL) Lab, Automotive Engineering Centre, Universiti Malaysia Pahang, Pekan 26600, Pahang, Malaysia
| | - Talal Yusaf
- Institute of Sustainable Energy, University Tenaga Nasional, Putrajaya Campus, 43000 Kajang, Malaysia
- School of Engineering and Technology, Central Queensland University, Brisbane, QLD 4008, Australia
| | - Hayder A. Dhahad
- Mechanical Engineering Department, University of Technology, Baghdad 19006, Iraq
| | - F. Benedict
- Enhanced Track, No. 9, Jalan Meranti Jaya 12, Meranti Jaya Industrial Park, Puchong 47120, Malaysia
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12
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Nguyen VCN, Phan HVT, Nguyen VK, Vo DT, Tran TN, Dao MT, Hoang LTTT. A Comparison of a Conventional Chemical Coagulant and a Natural Coagulant Derived from Cassia fistula Seeds for the Removal of Heavy Metal Ions. ARCHIVES OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 2023; 85:324-331. [PMID: 37249609 DOI: 10.1007/s00244-023-01005-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/24/2022] [Accepted: 05/09/2023] [Indexed: 05/31/2023]
Abstract
Cassia fistula seed-derived coagulant has been reported to exhibit high coagulating-flocculating activity, environmental friendliness, and cost-effectiveness for the wastewater treatment, especially of textile wastewater. For heavy metal removal, however, research focusing on evaluating the feasibility of this material is still limited. Therefore, this study reports jar-test experiments in which the Zn2+ and Ni2+ removal efficiency of C. fistula coagulant was assessed. Moreover, a comparison of coagulation performance using a conventional chemical coagulant and the natural coagulant was performed. Characterization of the C. fistula seed-derived coagulant revealed the presence of important functional groups and fibrous networks with rough surfaces. A bench-scale study indicated that the coagulation performance of the two coagulants depends strongly on the initial concentration of metal ions, pH level, and coagulant dosage. The C. fistula seed-derived coagulant was found to possess higher removal efficiency than polyaluminum chloride. This natural coagulant removed over 80% of metal ions at the optimal conditions of pH 5.0, a metal ion concentration of 25 ppm, and a dosage of 0.8 and 1.6 g/L for Zn2+ and Ni2+, respectively. This study shows that C. fistula seed-derived coagulant is a potential alternative to chemical coagulants and could be developed to provide an environmentally friendly, economical, and efficient wastewater treatment.
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Affiliation(s)
| | - Hoang-Vinh-Truong Phan
- Institute of Fundamental and Applied Sciences, Duy Tan University, Ho Chi Minh City, 700000, Vietnam
- Faculty of Natural Sciences, Duy Tan University, Da Nang, 550000, Vietnam
| | - Van-Kieu Nguyen
- Institute of Fundamental and Applied Sciences, Duy Tan University, Ho Chi Minh City, 700000, Vietnam
- Faculty of Natural Sciences, Duy Tan University, Da Nang, 550000, Vietnam
| | - Duc-Thuong Vo
- Department of Environmental Engineering, Thu Dau Mot University, Thu Dau Mot, Binh Duong, 820000, Vietnam
| | - Thanh-Nha Tran
- Department of Environmental Engineering, Thu Dau Mot University, Thu Dau Mot, Binh Duong, 820000, Vietnam
| | - Minh-Trung Dao
- Department of Environmental Engineering, Thu Dau Mot University, Thu Dau Mot, Binh Duong, 820000, Vietnam.
| | - Le-Thuy-Thuy-Trang Hoang
- Department of Environmental Engineering, Thu Dau Mot University, Thu Dau Mot, Binh Duong, 820000, Vietnam.
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13
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Song Y, Zhou J, Zhu Z, Li X, Zhang Y, Shen X, O'Reilly P, Li X, Liang X, Jiang L, Wang S. Heterostructure particles enable omnidispersible in water and oil towards organic dye recycle. Nat Commun 2023; 14:5779. [PMID: 37723155 PMCID: PMC10507067 DOI: 10.1038/s41467-023-41053-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Accepted: 08/22/2023] [Indexed: 09/20/2023] Open
Abstract
Dispersion of colloidal particles in water or oil is extensively desired for industrial and environmental applications. However, it often strongly depends on indispensable assistance of chemical surfactants or introduction of nanoprotrusions onto the particle surface. Here we demonstrate the omnidispersity of hydrophilic-hydrophobic heterostructure particles (HL-HBPs), synthesized by a surface heterogeneous nanostructuring strategy. Photo-induced force microscopy (PiFM) and adhesion force images both indicate the heterogeneous distribution of hydrophilic domains and hydrophobic domains on the particle surface. These alternating domains allow HL-HBPs to be dispersed in various solvents with different polarity and boiling point. The HL-HBPs can efficiently adsorb organic dyes from water and release them into organic solvents within several seconds. The surface heterogeneous nanostructuring strategy provides an unconventional approach to achieve omnidispersion of colloidal particles beyond surface modification, and the omnidispersible HL-HBPs demonstrate superior capability for dye recycle merely by solvent exchange. These omnidispersible HL-HBPs show great potentials in industrial process and environmental protection.
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Affiliation(s)
- Yongyang Song
- CAS Key Laboratory of Bio-inspired Materials and Interfacial Science, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, P. R. China
- University of Chinese Academy of Sciences, Beijing, P. R. China
| | - Jiajia Zhou
- South China Advanced Institute for Soft Matter Science and Technology, School of Emergent Soft Matter, South China University of Technology, Guangzhou, P. R. China
| | - Zhongpeng Zhu
- Suzhou Institute for Advanced Research, University of Science and Technology of China, Suzhou, P. R. China
| | - Xiaoxia Li
- CAS Key Laboratory of Bio-inspired Materials and Interfacial Science, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, P. R. China
- University of Chinese Academy of Sciences, Beijing, P. R. China
| | - Yue Zhang
- CAS Key Laboratory of Bio-inspired Materials and Interfacial Science, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, P. R. China
- University of Chinese Academy of Sciences, Beijing, P. R. China
| | - Xinyi Shen
- CAS Key Laboratory of Bio-inspired Materials and Interfacial Science, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, P. R. China
- University of Chinese Academy of Sciences, Beijing, P. R. China
| | | | - Xiuling Li
- CAS Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, P. R. China
| | - Xinmiao Liang
- CAS Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, P. R. China
| | - Lei Jiang
- CAS Key Laboratory of Bio-inspired Materials and Interfacial Science, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, P. R. China
- University of Chinese Academy of Sciences, Beijing, P. R. China
- Suzhou Institute for Advanced Research, University of Science and Technology of China, Suzhou, P. R. China
| | - Shutao Wang
- CAS Key Laboratory of Bio-inspired Materials and Interfacial Science, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, P. R. China.
- University of Chinese Academy of Sciences, Beijing, P. R. China.
- Suzhou Institute for Advanced Research, University of Science and Technology of China, Suzhou, P. R. China.
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14
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Ikram M, Karim R, Haider A, Shahzadi A, Algaradah MM, Ul-Hamid A, Nabgan W, Fouda AM, Ali S. Anomalous catalytic and antibacterial activity confirmed by molecular docking analysis of silver and polyacrylic acid doped CeO 2 nanostructures. RSC Adv 2023; 13:26149-26159. [PMID: 37664196 PMCID: PMC10472217 DOI: 10.1039/d3ra04760a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2023] [Accepted: 08/26/2023] [Indexed: 09/05/2023] Open
Abstract
This research presents the novel synthesis of CeO2 nanostructures (NSs) doped with a fixed amount of capping agent (polyacrylic acid-PAA) and different concentrations (0.01 and 0.03) of silver (Ag). This work aimed to examine the catalytic and antibacterial efficacy with evidential molecular docking analysis of Ag/PAA doped CeO2. Systematic characterization was used to analyze the effect of Ag and a capping agent on crystal structure, morphology, absorbance wavelength, and the exciton recombination rate of CeO2. The silver metal and capping agent (PAA) were added into CeO2 to reduce the size of NSs, enhancing the catalytic efficacy. These binary dopants (Ag-PAA) based CeO2 revealed remarkable results for catalytic de-colorization of rhodamine B dye and antimicrobial potential as the dopants provide more active sites. Notably, (0.03) Ag/PAA doped CeO2 NSs exhibited a substantial catalytic reduction (98.9%) of rhodamine B dye in an acidic medium. The higher doped CeO2 revealed a significant inhibition zone (3.75 mm) against Escherichia coli at maximal concentration. Furthermore, in silico docking showed the possible inhibitory impact of produced nanomaterials on the fatty acid biosynthesis enzymes FabI and FabH.
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Affiliation(s)
- Muhammad Ikram
- Solar Cell Applications Research Lab, Department of Physics, Government College University Lahore Lahore 54000 Punjab Pakistan
| | - Rizwan Karim
- Department of Physics, Riphah Institute of Computing and Applied Sciences (RICAS), Riphah International University 14 Ali Road Lahore Pakistan
| | - Ali Haider
- Department of Clinical Sciences, Faculty of Veterinary and Animal Sciences, Muhammad Nawaz Shareef University of Agriculture Multan 66000 Pakistan
| | - Anum Shahzadi
- Faculty of Pharmacy, The University of Lahore 54000 Pakistan
| | | | - Anwar Ul-Hamid
- Core Research Facilities, Research Institute, King Fahd University of Petroleum & Minerals Dhahran 31261 Saudi Arabia
| | - Walid Nabgan
- Departament d'Enginyeria Química, Universitat Rovira i Virgili Av Països Catalans 26 43007 Tarragona Spain
| | - Ahmed M Fouda
- Chemistry Department, Faculty of Science, King Khalid University Abha 61413 Saudi Arabia
| | - Salamat Ali
- Department of Physics, Riphah Institute of Computing and Applied Sciences (RICAS), Riphah International University 14 Ali Road Lahore Pakistan
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15
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Mapukata S, Ntsendwana B, Mokhena T, Sikhwivhilu L. Advances on sonophotocatalysis as a water and wastewater treatment technique: efficiency, challenges and process optimisation. Front Chem 2023; 11:1252191. [PMID: 37681207 PMCID: PMC10482105 DOI: 10.3389/fchem.2023.1252191] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2023] [Accepted: 08/11/2023] [Indexed: 09/09/2023] Open
Abstract
Due to water shortage and increased water pollution, various methods are being explored to improve water quality by treating contaminants. Sonophotocatalysis is a combination of two individual water treatment processes i.e., photocatalysis and sonocatalysis. With advantages including shorter reaction times and enhanced activity, this technique shows possible futuristic applications as an efficient water treatment technology. Herein, background insight on sonophotocalysis as a water and wastewater treatment technique as well as the general mechanism of activity is explained. The commonly used catalysts for sonophotocatalytic applications as well as their synthesis pathways are also briefly discussed. Additionally, the utilisation of sonophotocatalysis for the disinfection of various microbial species as well as treatment of wastewater pollutants including organic (dyes, pharmaceuticals and pesticides) and inorganic species (heavy metals) is deliberated. This review also gives a critical analysis of the efficiency, enhancement strategies as well as challenges and outlooks in this field. It is thus intended to give insight to researchers in the context of facilitating future developments in the field of water treatment, and advancing sonophotocatalysis towards large-scale implementation and commercialization.
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Affiliation(s)
- Sivuyisiwe Mapukata
- Nanotechnology Innovation Centre (NIC), Advanced Materials Division, Mintek, Johannesburg, South Africa
| | - Bulelwa Ntsendwana
- Nanotechnology Innovation Centre (NIC), Advanced Materials Division, Mintek, Johannesburg, South Africa
| | - Teboho Mokhena
- Nanotechnology Innovation Centre (NIC), Advanced Materials Division, Mintek, Johannesburg, South Africa
| | - Lucky Sikhwivhilu
- Nanotechnology Innovation Centre (NIC), Advanced Materials Division, Mintek, Johannesburg, South Africa
- Department of Chemistry, Faculty of Science, Engineering and Agriculture, University of Venda, Thohoyandou, South Africa
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16
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Krajewski M, Pietrzyk P, Osial M, Liou SC, Kubacki J. Iron-Iron Oxide Core-Shell Nanochains as High-Performance Adsorbents of Crystal Violet and Congo Red Dyes from Aqueous Solutions. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023. [PMID: 37256922 DOI: 10.1021/acs.langmuir.3c00967] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
The main aim of this work was to use the iron-iron oxide nanochains (Fe NCs) as adsorbents of the carcinogenic cationic crystal violet (CV) and anionic Congo red (CR) dyes from water. The investigated adsorbent was prepared by a magnetic-field-induced reduction reaction, and it revealed a typical core-shell structure. It was composed of an iron core covered by a thin Fe3O4 shell (<4 nm). The adsorption measurements conducted with UV-vis spectroscopy revealed that 15 mg of Fe NCs constituted an efficient dose to be used in the CV and CR treatment. The highest effectiveness of CV and CR removal was found for a contact time of 90 min at pH 7 and 150 min at pH 8, respectively. Kinetic studies indicated that the adsorption followed the pseudo-first-order kinetic model. The adsorption process followed the Temkin model for both dyes taking into account the highest value of the R2 coefficient, whereas in the case of CR, the Redlich-Peterson model could be also considered. The maximal adsorption capacity estimated from the Langmuir isotherms for the CV and CR was 778.47 and 348.46 mg g-1, respectively. Based on the Freundlich model, both dyes adsorbed on the Fe NCs through chemisorption, but Coulombic interactions between the dye and adsorbent cannot be excluded in the case of the CV dye. The obtained results proved that the investigated Fe NCs had an excellent adsorption ability for both dye molecules within five cycles of adsorption/desorption, and therefore, they can be considered as a promising material for water purification and environmental applications.
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Affiliation(s)
- Marcin Krajewski
- Polish Academy of Sciences, Institute of Fundamental Technological Research, Pawińskiego 5B, 02-106 Warsaw, Poland
| | - Paulina Pietrzyk
- Polish Academy of Sciences, Institute of Fundamental Technological Research, Pawińskiego 5B, 02-106 Warsaw, Poland
| | - Magdalena Osial
- Polish Academy of Sciences, Institute of Fundamental Technological Research, Pawińskiego 5B, 02-106 Warsaw, Poland
| | - Sz-Chian Liou
- Advanced Imaging and Microscopy Laboratory, Maryland Nano Center, University of Maryland, College Park, Maryland 20742-2831, United States
| | - Jerzy Kubacki
- Faculty of Science and Technology, Institute of Physics, University of Silesia in Katowice, 75 Pułku Piechoty 1, 41-500 Chorzów, Poland
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17
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Ma W, Liu X, Lu H, He Q, Ding K, Wang X, Wang W, Guo F. Chitosan-based composite hydrogel with a rigid-in-flexible network structure for pH-universal ultra-efficient removal of dye. Int J Biol Macromol 2023; 241:124579. [PMID: 37105247 DOI: 10.1016/j.ijbiomac.2023.124579] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2022] [Revised: 04/05/2023] [Accepted: 04/20/2023] [Indexed: 04/29/2023]
Abstract
Polysaccharide-based hydrogel adsorbents become popular because of their high adsorption capacity and fast adsorption rate, but their low removal rate and poor pH resistance have always been fatal shortcomings. Herein, a feasible strategy was proposed to strengthen the ability of hydrogel adsorbent to remove organic pollutants (i.e., dye) by incorporating natural rectorite (REC) into chitosan-g-poly (2-acrylamido-2-methyl-propane-sulfonic-acid) hydrogel network to form a rectorite-in-polymer network structure. The introduction of less dosage of REC (1.2 wt%) into the hydrogel facilitates to improve its adsorption capacities toward methylene blue (MB) in deionized water, tap water, seawater, Yangtze River water, and Yellow River water (1083.39-1303.49 mg/g); while incorporating higher content of REC (15.8 wt% REC) helps to improve the removal rate (99.6 % for MB in real waters), which are greatly superior to commercial activated carbons. The adsorbent keeps high adsorption efficiency in a broad pH range (2-11), and can be reused for >4 times.
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Affiliation(s)
- Wenyuan Ma
- College of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot 010021, PR China
| | - Xiangyu Liu
- College of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot 010021, PR China
| | - Hang Lu
- College of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot 010021, PR China
| | - Qingdong He
- College of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot 010021, PR China
| | - Ke Ding
- College of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot 010021, PR China
| | - Xuehan Wang
- College of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot 010021, PR China
| | - Wenbo Wang
- College of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot 010021, PR China.
| | - Fang Guo
- College of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot 010021, PR China
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18
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Abdel-Hady EE, Mohamed HFM, Hafez SHM, Fahmy AMM, Magdy A, Mohamed AS, Ali EO, Abdelhamed HR, Mahmoud OM. Textural properties and adsorption behavior of Zn-Mg-Al layered double hydroxide upon crystal violet dye removal as a low cost, effective, and recyclable adsorbent. Sci Rep 2023; 13:6435. [PMID: 37081088 PMCID: PMC10119303 DOI: 10.1038/s41598-023-33142-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2022] [Accepted: 04/07/2023] [Indexed: 04/22/2023] Open
Abstract
The preparation of adsorbents plays a vital role in the adsorption method. In particular, many adsorbents with high specific surface areas and unique shapes are essential for the adsorption strategy. A Zn-Mg-Al/layer double hydroxide (LDH) was designed in this study using a simple co-precipitation process. Adsorbent based on Zn-Mg-Al/LDH was used to remove crystal violet (CV) from the wastewater. The impacts of the initial dye concentration, pH, and temperature on CV adsorption performance were systematically examined. The adsorbents were analyzed both before and after adsorption using FTIR, XRD, and SEM. The roughness parameters and surface morphologies of the produced LDH were estimated using 3D SEM images. Under the best conditions (dose of adsorbent = 0.07 g and pH = 9), the maximum adsorption capacity has been achieved. Adsorption kinetics studies revealed that the reaction that led to the adsorption of CV dye onto Zn-Mg-Al/LDH was a pseudo-second-order model. Additionally, intraparticle diffusion suggests that Zn-Mg-Al/LDH has a fast diffusion constant for CV molecules (0.251 mg/(g min1/2)). Furthermore, as predicted by the Langmuir model, the maximal Zn-Mg-Al/LDH adsorption capacity of CV was 64.80 mg/g. The CV dimensionless separation factor (RL) onto Zn-Mg-Al/LDH was 0.769, indicating that adsorption was favorable. The effect of temperature was performed at 25, 35, and 45 °C in order to establish the thermodynamic parameters ∆Ho, ∆So, and ∆Go. The computed values indicated exothermic and spontaneous adsorption processes. The study presented here might be used to develop new adsorbents with enhanced adsorption capabilities for the purpose of protecting the water environment.
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Affiliation(s)
- E E Abdel-Hady
- Physics Department, Faculty of Science, Minia University, P.O. Box 61519, Minia, Egypt
| | - Hamdy F M Mohamed
- Physics Department, Faculty of Science, Minia University, P.O. Box 61519, Minia, Egypt.
| | - Sarah H M Hafez
- Physics Department, Faculty of Science, Minia University, P.O. Box 61519, Minia, Egypt
| | - Abdalla M M Fahmy
- Physics Department, Faculty of Science, Minia University, P.O. Box 61519, Minia, Egypt
| | - Abdelhamed Magdy
- Physics Department, Faculty of Science, Minia University, P.O. Box 61519, Minia, Egypt
| | - Aya S Mohamed
- Physics Department, Faculty of Science, Minia University, P.O. Box 61519, Minia, Egypt
| | - Eman O Ali
- Physics Department, Faculty of Science, Minia University, P.O. Box 61519, Minia, Egypt
| | - Hager R Abdelhamed
- Physics Department, Faculty of Science, Minia University, P.O. Box 61519, Minia, Egypt
| | - Osama M Mahmoud
- Physics Department, Faculty of Science, Minia University, P.O. Box 61519, Minia, Egypt
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19
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Sellaoui L, Said S, Bouzidi M, Alshammari AS, Khan ZR, Gandouzi M, Schnorr C, Dotto GL, Silva L, Streit AF, Lamine AB, Erto A. Highlighting the adsorption mechanism of dyes onto activated carbon derived from sludge by theoretical physical analysis. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:15789-15796. [PMID: 36173520 DOI: 10.1007/s11356-022-23287-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/03/2022] [Accepted: 09/22/2022] [Indexed: 06/16/2023]
Abstract
An activated carbon (AC) deriving from sludge is used in this research for the adsorption of two water pollutants, namely Reactive Black 5 (RB5) and Green Alizarin (GA) dyes, at different temperatures. The adsorption capacities varied from 277.2 to 312.69 mg/g for GA and from 225.82 to 256.02 mg/g for RB5. Comparatively, this adsorbent presents good performances in removing these dyes from wastewater. The application of physical models to adsorption experiments is advantageous to provide new insights into the dyes' adsorption mechanism. A dedicated physical adsorption model suggests that RB5 and GA dyes are adsorbed in a monolayer. Moreover, the orientation of RB5 and GA dyes on AC resulted in an angled position, determining a multi-molecular process. In addition, both dyes are adsorbed by the occurrence of an aggregation process, forming a dimer. The impact of temperature can be also interpreted, allowing concluding that it plays a relevant role in removing these dyes. The calculation and interpretation of adsorption energies show that the dyes are removed via an endothermic process, and physical forces are involved.
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Affiliation(s)
- Lotfi Sellaoui
- Laboratory of Quantum and Statistical Physics, Monastir University, LR18ES18, Monastir, Tunisia.
| | - Sarra Said
- Textile Materials and Processes Research Unit (MPTEX), National Engineering School of Monastir, University of Monastir, Av. Ibn El Jazzar 5019, Monastir, Tunisia
| | - Mohamed Bouzidi
- Department of Physics, College of Science, University of Ha'il, P.O. Box 2440, Ha'il, Saudi Arabia
- Laboratoire de Recherche Sur Les Hétéro-Epitaxies Et Applications (LRHEA), Faculté Des Sciences de Monastir, Université de Monastir, 5000, Monastir, Tunisia
| | | | - Ziaul Raza Khan
- Department of Physics, College of Science, University of Ha'il, P.O. Box 2440, Ha'il, Saudi Arabia
| | - Mohamed Gandouzi
- Department of Physics, College of Science, University of Ha'il, P.O. Box 2440, Ha'il, Saudi Arabia
| | - Carlos Schnorr
- Research Group On Adsorptive and Catalytic Process Engineering (ENGEPAC), Federal University of Santa Maria, Av. Roraima, 1000-7, Santa Maria, RS, 97105-900, Brazil
| | - Guilherme Luiz Dotto
- Research Group On Adsorptive and Catalytic Process Engineering (ENGEPAC), Federal University of Santa Maria, Av. Roraima, 1000-7, Santa Maria, RS, 97105-900, Brazil
| | - Luis Silva
- Research Group On Adsorptive and Catalytic Process Engineering (ENGEPAC), Federal University of Santa Maria, Av. Roraima, 1000-7, Santa Maria, RS, 97105-900, Brazil
| | - Angélica Fátima Streit
- Research Group On Adsorptive and Catalytic Process Engineering (ENGEPAC), Federal University of Santa Maria, Av. Roraima, 1000-7, Santa Maria, RS, 97105-900, Brazil
| | | | - Alessandro Erto
- Dipartimento Di Ingegneria Chimica, Dei Materiali E Della Produzione Industriale, Università Di Napoli Federico II, 80125, Naples, Italy
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20
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Pandey S, Makhado E, Kim S, Kang M. Recent developments of polysaccharide based superabsorbent nanocomposite for organic dye contamination removal from wastewater - A review. ENVIRONMENTAL RESEARCH 2023; 217:114909. [PMID: 36455632 DOI: 10.1016/j.envres.2022.114909] [Citation(s) in RCA: 13] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/23/2022] [Revised: 10/15/2022] [Accepted: 11/21/2022] [Indexed: 06/17/2023]
Abstract
One of the main problems with water pollution is dye contamination of rivers, industrial effluents, and water sources. It has endangered the world's sources of drinking water. Several remediation strategies have been carefully developed and tested to minimize this ominous picture. Due to their appealing practical and financial benefits, adsorption methods in particular are often listed as one of the most popular solutions to remediate dye-contaminated water. Biopolymer-based hydrogel nanocomposites are a cutting-edge class of materials with a wide range of applications that are effective in removing organic dyes from the environment. Since the incorporation of various materials into hydrogel matrices generated composite materials with distinct characteristics, these unique materials were often alluded to as ideal adsorbents. The fundamental emphasis of the conceptual and critical review of the literature in this research is the significant potential of hydrogel nanocomposites (HNCs) to remediate dye-contaminated water (especially for articles from the previous five years). The review also provides knowledge for the development of biopolymer-based HNCs, prospects, and opportunities for future research. It is also focused on optimum conditions for dye adsorption processes along with their adsorption kinetics and isotherm models. In summary, the information gained in this review research may contribute to a strengthened scientific rationale for the practical and efficient application of these novel adsorbent materials.
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Affiliation(s)
- Sadanand Pandey
- Department of Chemistry, College of Natural Science, Yeungnam University, 280 Daehak-Ro, Gyeongsan, Gyeongbuk, 38541, Republic of Korea.
| | - Edwin Makhado
- Department of Chemistry, School of Physical and Mineral Sciences, University of Limpopo, Sovenga, 0727, Polokwane, South Africa
| | - Sujeong Kim
- Department of Chemistry, College of Natural Science, Yeungnam University, 280 Daehak-Ro, Gyeongsan, Gyeongbuk, 38541, Republic of Korea
| | - Misook Kang
- Department of Chemistry, College of Natural Science, Yeungnam University, 280 Daehak-Ro, Gyeongsan, Gyeongbuk, 38541, Republic of Korea.
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21
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Çiçek Özkan B, Selen V, Gülyüz F, Dursun G. Comparative Photocatalytic Activity and Total Organic Carbon Removal Efficiency of TiO
2
And ZnO for Reactive Black 5 Photodegradation. ChemistrySelect 2023. [DOI: 10.1002/slct.202204314] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Betül Çiçek Özkan
- Department of Metallurgical and Materials Engineering Technology Faculty Fırat University 23279 Elazığ Turkey
| | - Veyis Selen
- Department of Bioengineering Engineering Faculty Fırat University 23279 Elazığ Turkey
| | - Feyza Gülyüz
- Department of Chemical Engineering Engineering Faculty Firat University 23279 Elazig Turkey
| | - Gülbeyi Dursun
- Department of Chemical Engineering Engineering Faculty Firat University 23279 Elazig Turkey
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22
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Wang XR, Meng ZY, Wang XF, Cai WL, Liu K, Wang D. Silk Nanofibril-Palygorskite Composite Membranes for Efficient Removal of Anionic Dyes. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:247. [PMID: 36678001 PMCID: PMC9864787 DOI: 10.3390/nano13020247] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/07/2022] [Revised: 12/27/2022] [Accepted: 01/03/2023] [Indexed: 06/17/2023]
Abstract
To develop membrane materials with good performance for water purification that are green and low cost, this work reports an organic-inorganic composite membrane composed of silk nanofibrils (SNFs) and palygorskite (PGS). To improve the stability of the the composite membrane, genipin was used as a crosslinking agent to induce the conformational transition of SNF chains from random coils to β-sheets, reducing the swelling and hydrolysis of the membrane. The separation performance can be adjusted by tailoring the component ratio of the nanomaterial. The results showed that these membranes can effectively remove anionic dyes from water, and they exhibit excellent water permeability. The SNF-based membrane had strong mechanical and separation properties, and the PGS could tune the structure of composite membranes to enhance their permeability, so this green composite membrane has good prospects in water treatment and purification applications.
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Affiliation(s)
- Xu-rui Wang
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, China
| | - Zhe-yi Meng
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, China
| | - Xue-fen Wang
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, China
| | - Wei-long Cai
- Qingyuan Innovation Laboratory, Quanzhou 362801, China
| | - Ke Liu
- Key Laboratory of Textile Fiber and Products, Ministry of Education, Hubei International Scientific and Technological Cooperation Base of Intelligent Textile Materials and Application, Wuhan Textile University, Wuhan 430200, China
| | - Dong Wang
- Key Laboratory of Textile Fiber and Products, Ministry of Education, Hubei International Scientific and Technological Cooperation Base of Intelligent Textile Materials and Application, Wuhan Textile University, Wuhan 430200, China
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23
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Asranudin, Holilah, Purnomo AS, Bahruji H, Allouss D, El Alaoui-Elbalrhiti I, Subagyo R, Rohmah AA, Prasetyoko D. Hectorite-CTAB-alginate composite beads for water treatment: kinetic, isothermal and thermodynamic studies. RSC Adv 2023; 13:790-801. [PMID: 36686924 PMCID: PMC9809540 DOI: 10.1039/d2ra06934b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2022] [Accepted: 12/19/2022] [Indexed: 01/04/2023] Open
Abstract
Encapsulation of hectorite-modified CTAB with Ca-alginate formed reusable adsorbent beads for wastewater treatment. The thermogravimetric analysis (TGA) investigation indicated excellent thermal stability results for BHec-40 compared to Hec-40. Although the mesoporous surface area of BHec-40 decreased to 79.74 m2 g-1 compared to 224.21 m2 g-1 for Hec-40, the hectorite-CTAB-alginate beads showed high adsorption capacity and stability for methyl orange (MO) adsorption with more than 60% removal after five adsorption-desorption cycles. The influence of pH (3-11), temperature (30, 40, and 50 °C), initial concentration (50-400 mg L-1), and contact time were studied to obtain the kinetics and thermodynamics of adsorption. The outcomes revealed a maximum monolayer adsorption capacity of 117.71 mg g-1 for BHec-40. The kinetics of adsorption demonstrated the suitability of using the pseudo-first-order kinetic model, while the equilibrium adsorption data follows the Langmuir isotherm. Thermodynamic analysis indicates physisorption of MO onto BHec-40. BHec-40 improves the reusability as an adsorbent for the removal of anionic dyes from aqueous media.
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Affiliation(s)
- Asranudin
- Department of Chemistry, Institut Teknologi Sepuluh Nopember (ITS) Surabaya 60111 Indonesia
- Department of Food Science and Technology, Faculty of Agriculture, Halu Oleo University Kendari 93231 Indonesia
| | - Holilah
- Research Center for Biomass and Bioproducts, National Research and Innovation Agency of Indonesia (BRIN) Cibinong 16911 Indonesia
- Department of Food Science and Technology, Faculty of Agriculture, Halu Oleo University Kendari 93231 Indonesia
| | - Adi Setyo Purnomo
- Department of Chemistry, Institut Teknologi Sepuluh Nopember (ITS) Surabaya 60111 Indonesia
| | - Hasliza Bahruji
- Centre of Advanced Material and Energy Sciences, Universiti Brunei Darussalam Gadong Bandar Seri Begawan 1410 Brunei Darussalam
| | - Dalia Allouss
- Laboratoire de Matériaux, Catalyse et Valorisation des Ressources Naturelles, Faculté des Sciences et Techniques, Hassan II University 19 Casablanca Marocco
| | | | - Riki Subagyo
- Department of Chemistry, Institut Teknologi Sepuluh Nopember (ITS) Surabaya 60111 Indonesia
| | - Alya Awinatul Rohmah
- Department of Chemistry, Institut Teknologi Sepuluh Nopember (ITS) Surabaya 60111 Indonesia
| | - Didik Prasetyoko
- Department of Chemistry, Institut Teknologi Sepuluh Nopember (ITS) Surabaya 60111 Indonesia
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24
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Ikram M, Haider A, Bibi ST, Ul-Hamid A, Haider J, Shahzadi I, Nabgan W, Moeen S, Ali S, Goumri-Said S, Kanoun MB. Synthesis of Al/starch co-doped in CaO nanoparticles for enhanced catalytic and antimicrobial activities: experimental and DFT approaches. RSC Adv 2022; 12:32142-32155. [PMID: 36425723 PMCID: PMC9644690 DOI: 10.1039/d2ra06340a] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2022] [Accepted: 10/28/2022] [Indexed: 08/03/2023] Open
Abstract
In this work, aluminum/starch (St)-doped CaO nanoparticles (NPs) were synthesized by a co-precipitation method to degrade harmful dyes in various pH media. Systematic characterization was performed to investigate the influence of Al/St dopants on the composition, crystal structure, functional groups present, optical characteristics, and morphology of CaO NPs. Further hybrid density functional analyses corroborated that the band gap energy was reduced as the Al concentration in starch-doped CaO is increased. Optical absorption spectra of the synthesized materials revealed a redshift upon doping, which indicated depletion in the band gap energy of Al/St-doped CaO. PL spectroscopy showed that the intensity of CaO was reduced by the incorporation of Al and St assigned to minimum electron-hole pair recombination. Interlayer spacing and morphological features were determined by HR-TEM. HRTEM revealed that the control sample has cubic NPs and the incorporation of St showed overlapping around agglomerated NPs. The d-spacing of CaO was little enhanced by the inclusion of dopants. Experimental outcomes indicated that the addition of Co-dopants improved the catalytic potential of CaO NPs. Al (4%)/St-doped CaO NPs expressed a significant reduction of methylene blue in a basic environment. The maximum bactericidal performance was observed as 10.25 mm and 4.95 mm in the inhibition zone against S. aureus and E. coli, respectively, after the addition of Al and St in CaO.
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Affiliation(s)
- Muhammad Ikram
- Solar Cell Applications Research Lab, Department of Physics, Government College University Lahore Lahore 54000 Punjab Pakistan
| | - Ali Haider
- Department of Clinical Sciences, Faculty of Veterinary and Animal Sciences, Muhammad Nawaz Shareef University of Agriculture Multan 66000 Punjab Pakistan
| | - Syeda Tayaba Bibi
- Department of Physics, RICAS, Riphah International University Lahore 54000 Pakistan
| | - Anwar Ul-Hamid
- Core Research Facilities, King Fahd University of Petroleum & Minerals Dhahran 31261 Saudi Arabia
| | - Junaid Haider
- Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences Tianjin 300308 China
| | - Iram Shahzadi
- Punjab University College of Pharmacy, University of the Punjab Lahore Pakistan
| | - Walid Nabgan
- Department d'Enginyeria Química, Universitat Rovira i Virgili Tarragona 43007 Spain
| | - Sawaira Moeen
- Solar Cell Applications Research Lab, Department of Physics, Government College University Lahore Lahore 54000 Punjab Pakistan
| | - Salamat Ali
- Department of Physics, RICAS, Riphah International University Lahore 54000 Pakistan
| | - Souraya Goumri-Said
- College of Science, Physics Department, Alfaisal University P.O. Box 50927 Riyadh 11533 Saudi Arabia
| | - Mohammed Benali Kanoun
- Department of Physics, College of Science, King Faisal University P.O. Box 400 Al-Ahsa 31982 Saudi Arabia
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25
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Rostamzadeh D, Sadeghi S. Ni doped zinc oxide nanoparticles supported bentonite clay for photocatalytic degradation of anionic and cationic synthetic dyes in water treatment. J Photochem Photobiol A Chem 2022. [DOI: 10.1016/j.jphotochem.2022.113947] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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26
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Yaghoobian S, Hasani Zonoozi M, Saeedi M. Performance evaluation of Fe-based water treatment sludge for dewatering of iron ore tailings slurry using coagulation-flocculation process: Optimization through response surface methodology. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2022; 316:115240. [PMID: 35576712 DOI: 10.1016/j.jenvman.2022.115240] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/27/2021] [Revised: 05/03/2022] [Accepted: 05/04/2022] [Indexed: 06/15/2023]
Abstract
This research attempted to investigate the feasibility of using drinking water treatment sludge (ferric chloride sludge, FCS) as a coagulant for turbidity removal from iron ore tailings slurry. The evaluation was performed in two phases. In the first phase, the one factor at a time (OFAT) approach was used to study the effects of FCS dosage, initial pH, and initial turbidity on turbidity removal efficiency (TR%) and the volume of the sediment produced at the end of the process (SV). In the second phase, response surface methodology (RSM) was employed to assess the individual and interaction effects of the parameters on TR% and SV. Numerical multiple-response optimization was carried out using RSM to maximize TR% and minimize SV simultaneously. At optimum condition (FCS dose of 0.13 g dried FCS/L, initial pH of 10, and initial turbidity of 538 NTU), the removal of all particles in the range of 0.25-1 μm and 2-55 μm from slurry led to the TR% of 78.80% and SV of 0.74 mL (per 250 mL of tailings). Characterization tests indicated that at alkaline pH values, the higher presence of hydroxide compounds intensified the enmeshment in a precipitate or sweep-floc mechanism, which was the predominant removal mechanism in this work. This study demonstrated the remarkable performance of FCS as a coagulant in water reclamation from iron beneficiation wastewater.
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Affiliation(s)
- Samaneh Yaghoobian
- Department of Civil Engineering, Iran University of Science and Technology (IUST), Narmak, Tehran, 16846-13114, Iran.
| | - Maryam Hasani Zonoozi
- Department of Civil Engineering, Iran University of Science and Technology (IUST), Narmak, Tehran, 16846-13114, Iran.
| | - Mohsen Saeedi
- Department of Civil Engineering, Iran University of Science and Technology (IUST), Narmak, Tehran, 16846-13114, Iran.
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27
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Removal of Methyl Violet from Aqueous Solution by Adsorption onto Halloysite Nanoclay: Experiment and Theory. TOXICS 2022; 10:toxics10080445. [PMID: 36006124 PMCID: PMC9412486 DOI: 10.3390/toxics10080445] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/15/2022] [Revised: 07/24/2022] [Accepted: 08/01/2022] [Indexed: 11/25/2022]
Abstract
Methyl Violet (MV) was removed from aqueous solutions by adsorption onto halloysite nanoclay (HNC) employing equilibrium, kinetics, thermodynamic data, molecular modellingR (MD), and Monte Carlo (MC) simulations. The chosen experimental variables were pH, temperature, starting MV concentration, contact time, and adsorbent dosage. The adsorption rate was determined to increase with increasing contact time, initial dye concentration, pH, and temperature. The Langmuir, Freundlich, Temkin, and Dubinin–Radushkevich (D-R) isotherms were utilized to determine the adsorption capacity of HNC. The Langmuir equation matched equilibrium data better than the other models, whereas the pseudo-second-order model better described kinetic data, and thermodynamic analyses revealed that the adsorption process was spontaneous, endothermic, and physisorption-based. This study focused on two distinct molecular mechanics-based theoretical approaches (MC and MD). These techniques enabled a molecular comprehension of the interaction between the MV molecule and the halloysite surface. Theoretical results were consistent with experimental findings. The outcomes revealed that HNC is an excellent dye adsorbent for industrial effluents.
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28
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Ghasemi MN, Esmaeilzadeh F, Mowla D, Elhambakhsh A. Treatment of methyldiethanolamine wastewater using subcritical and supercritical water oxidation: parameters study, process optimization and degradation mechanism. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:57688-57702. [PMID: 35355177 DOI: 10.1007/s11356-022-19910-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/26/2021] [Accepted: 03/22/2022] [Indexed: 06/14/2023]
Abstract
In this examination, sub/supercritical water oxidation (SCWO) in a batch reactor was employed to degrade methyldiethanolamine (MDEA). To do so, the impact of different operating parameters including temperature (300-500 °C), time (0-100 s), initial MDEA concentration (1000-4000 ppm), oxidant coefficient (0.7-2), and pH (7.3-9.5) on MDEA degradation was separately and together investigated. Subsequently, the response surface method (RSM) was applied to optimize the operating condition of MDEA degradation. Based on the obtained results, a maximum amount of 97.4% MDEA degradation was achieved at the initial MDEA concentration of 1095 ppm in optimal condition (i.e., oxidant coefficient: 1.913, temperature: 472 °C and residence time: about 17 s). Furthermore, according to the HPLC analysis, there was a negligible amounts of formic acid (CH2O2) and nitrous acid (HNO2) in the solution at the end of MDEA removal experiment. Eventually, the mechanism of MDEA degradation was acquired using molecular dynamics simulation (MDS), which had an acceptable coordination with the experimental results. In this way, the MDS results revealed that the presence of CH2O2 and HNO2 compounds in the products was related to the degradation of MDEA and their production as by-products during the SCWO experiments.
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Affiliation(s)
- Mohammad Noor Ghasemi
- Department of Chemical and Petroleum Engineering, School of Chemical and Petroleum Engineering, Enhanced Oil and Gas Recovery Institute, Advanced Research Group for Gas Condensate Recovery, Shiraz University, 7134851154, Shiraz, , Iran
| | - Feridun Esmaeilzadeh
- Department of Chemical and Petroleum Engineering, School of Chemical and Petroleum Engineering, Enhanced Oil and Gas Recovery Institute, Advanced Research Group for Gas Condensate Recovery, Shiraz University, 7134851154, Shiraz, , Iran.
| | - Dariush Mowla
- Department of Chemical and Petroleum Engineering, School of Chemical and Petroleum Engineering, Enhanced Oil and Gas Recovery Institute, Advanced Research Group for Gas Condensate Recovery, Shiraz University, 7134851154, Shiraz, , Iran
| | - Abbas Elhambakhsh
- Department of Chemical and Petroleum Engineering, School of Chemical and Petroleum Engineering, Enhanced Oil and Gas Recovery Institute, Advanced Research Group for Gas Condensate Recovery, Shiraz University, 7134851154, Shiraz, , Iran
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29
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The Adsorptive Removal of Bengal Rose by Artichoke Leaves: Optimization by Full Factorials Design. WATER 2022. [DOI: 10.3390/w14142251] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Currently, the dye industry is increasing its production as a consequence of the growing need for their products in different manufacturing sectors, such as textiles, plastics, food, paper, etc... Thereafter, these industries generate very large volumes of effluents contaminated by these dyes, which require proper removal treatment before final discharge of the effluents into the environment. In this study, artichoke leaves were used as an economical and eco-friendly bio-adsorbent for Bengal Rose (BR) dye removal. Bio-adsorbent obtained from artichoke leaves was ground to powder size. The resulting powder was characterized by different methods, such as Brunauer-Emmett-Teller (BET) surface area analysis, scanning electron microscopy(SEM), X-ray Diffraction (XRD), Fourier transfer infrared (FTIR), pH at point of zero charge (pHpzc), equilibrium pH, iodine number, methylene blue number, phenol number, density, Energy dispersive X-ray spectroscopy (EDX) and Thermo-gravimetric analysis (TGA). Thereafter, the bio-adsorbent was used to study its capability for removing BR dye by testing contact time, initial concentration of dye and temperature. The results show that the saturation of bio-sorbent was reached after 40 min and the removal rate of BR dye by artichoke leaves powder (ALP) was 4.07 mg/g, which corresponds to a removal efficiency of 80.1%. A design of experiences (DOE) based on a two-level full factorial design (23) was used to study the effects of different parameters, such as pH, temperature and bio-adsorbent dosage on BR dye removal efficiency. The obtained results show that the highest removal efficiency was 86.5% for the optimized values of pH (4), temperature (80 °C) and bio-adsorbent dosage (8 g/L). Furthermore, a satisfying accordance between experimental and predicted data was observed. The kinetic and isotherm studies show that the pseudo-second order model simulated adequately the obtained data and it was found that Langmuir and Temkin isotherm models are liable and suitable for evaluating the adsorption process performance. Free energy change of adsorption (ΔG°), enthalpy change (ΔH°) and entropy change (ΔS°) were furthermore calculated to predict the nature of the adsorption process.
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30
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Fe-Immobilised Catechol-Based Hypercrosslinked Polymer as Heterogeneous Fenton Catalyst for Degradation of Methylene Blue in Water. Polymers (Basel) 2022; 14:polym14132749. [PMID: 35808793 PMCID: PMC9269043 DOI: 10.3390/polym14132749] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2022] [Revised: 06/24/2022] [Accepted: 06/29/2022] [Indexed: 02/01/2023] Open
Abstract
Clean water is one of the sustainable development goals. Organic dye is one of the water pollutants affecting water quality. Hence, the conversion of dyes to safer species is crucial for water treatment. The Fenton reaction using Fe as a catalyst is a promising process. However, homogeneous catalysts are normally sensitive, difficult to separate, and burdensome to reuse. Therefore, a catechol-based hypercrosslinked polymer (catechol-HCP) was developed as an inexpensive solid support for Fe (catechol-HCP-Fe) and applied as a heterogenous Fenton catalyst. The good interaction of the catechol moiety with Fe, as well as the porous structure, simple preparation, low cost, and high stability of catechol-HCP, make it beneficial for Fe-loading in the polymer and Fenton reaction utilisation. The catechol-HCP-Fe demonstrated good catalytic activity for methylene blue (MB) degradation in a neutral pH. Complete decolouration of 100 ppm MB could be observed within 25 min. The rate of reaction was influenced by H2O2 concentration, polymer dose, MB concentration, pH, and temperature. The catechol-HCP-Fe could be reused for at least four cycles. The dominant reactive species of the reaction was considered to be singlet oxygen (1O2), and the plausible mechanism of the reaction was proposed.
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31
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Long W, She Q. A multifunctional and low-energy electrochemical membrane system for chemical-free regulation of solution pH. WATER RESEARCH 2022; 216:118330. [PMID: 35358878 DOI: 10.1016/j.watres.2022.118330] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/11/2022] [Revised: 03/09/2022] [Accepted: 03/18/2022] [Indexed: 06/14/2023]
Abstract
A proper pH environment is essential for a wide variety of industries and applications especially related to water treatment. Current methods for pH adjustment including addition of acid/base and electrochemical processes demonstrate disadvantages associated with environment and energy. Here, we designed a multifunctional electrochemical membrane system (EMS) with one piece of filtration membrane inserted into an electrochemical cell. When electrical field was applied, OH- and H+ ions were produced from reduction and oxidation reactions at cathode and anode, respectively. The membrane posed a resistance for the transport of OH- and H+ ions and prevented their mixing in the cell. The EMS can be also operated in a filtration mode, which could simultaneously regulate permeate and feed pH and accomplish water filtration. In both non-filtration and filtration modes, EMS could achieve effective control of solution pH over a wide range by exerting different voltages without dosing any chemicals. Under the voltage of 1.2 V, the solution pH could reach and be maintained at 10.7 and 3.3 in cathodic and anodic channels, respectively. Furthermore, it was experimentally demonstrated that the EMS only consumed extremely low energy. This, together with membrane filtration in an integrated manner, highlights the huge potential of the EMS for applications in various water industries.
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Affiliation(s)
- Wei Long
- School of Civil and Environmental Engineering, Nanyang Technological University, Singapore, 639798; Singapore Membrane Technology Centre, Nanyang Environment & Water Research Institute, Nanyang Technological University, Singapore, 637141
| | - Qianhong She
- School of Civil and Environmental Engineering, Nanyang Technological University, Singapore, 639798; Singapore Membrane Technology Centre, Nanyang Environment & Water Research Institute, Nanyang Technological University, Singapore, 637141.
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32
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Pratibha, Rajput JK. Synergistically Enhanced Solar‐light Driven Degradation of Hazardous Food Colorants by Ultrasonically Derived MgFe
2
O
4
/S‐doped g‐C
3
N
4
Nanocomposite: A Z‐Scheme System Based Heterojunction Approach. Appl Organomet Chem 2022. [DOI: 10.1002/aoc.6745] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Pratibha
- Department of Chemistry, Dr. B. R Ambedkar National Institute of Technology Jalandhar Punjab India
| | - Jaspreet Kaur Rajput
- Department of Chemistry, Dr. B. R Ambedkar National Institute of Technology Jalandhar Punjab India
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33
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Gao H, Jiang J, Huang Y, Wang H, Sun J, Jin Z, Wang J, Zhang J. Synthesis of hydrogels for adsorption of anionic and cationic dyes in water: ionic liquid as a crosslinking agent. SN APPLIED SCIENCES 2022. [DOI: 10.1007/s42452-022-04996-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/07/2022] Open
Abstract
AbstractIn this work, we synthesized an ionic liquid (IL)—(Dimethylamino)ethyl Methacrylate maleate ([DMAEMA]MA) as the crosslinker, through one-pot to synthesized hydrogels with high adsorption capacity for dye in water. Both anionic dyes (methylene blue, rhodamine B) and cationic dyes (congo red, eosin B) could be adsorbed by this type of hydrogel with different adsorption mechanism, and its adsorption capacity for methylene blue (MB), rhodamine B (RHB), congo red (CR), eosin B (EB) were 489.1, 463.2, 465.5 and 462 mg/g (amount of dye adsorbed per gram of hydrogel), respectively. The surface structure of the hydrogel before and after adsorption was observed and compared by scanning electron microscope (SEM). After studying the adsorption isotherms of the hydrogel adsorbent, it was found that the hydrogel adsorbent had two adsorption mechanisms. This was not found in reported literatures previously.
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34
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Wen Y, Xie Z, Xue S, Li W, Ye H, Shi W, Liu Y. Functionalized polymethyl methacrylate-modified dialdehyde guar gum containing hydrazide groups for effective removal and enrichment of dyes, ion, and oil/water separation. JOURNAL OF HAZARDOUS MATERIALS 2022; 426:127799. [PMID: 34802827 DOI: 10.1016/j.jhazmat.2021.127799] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/14/2021] [Revised: 11/05/2021] [Accepted: 11/11/2021] [Indexed: 06/13/2023]
Abstract
In the study, a novel polymethacryloyl hydrazone modified guar gum adsorption material (GSA) was prepared via condensation between polyhydrazide and dialdehyde guar gum. GSA exhibited an abundant porous structure, higher selectivity for cationic pollutants in high-concentration wastewater like methylene blue (MB), malachite green (MG) dyes, and Cu2+. Under optimized experimental conditions, the maximum equilibrium adsorption capacity of MB, MG, and Cu2+ were 1418.36 mg/g, 1375.58 mg/g, and 196 mg/g, respectively. Adsorption isotherms and kinetics were well fitted with the Langmuir isotherm model and pseudo-second-order kinetic model. The thermodynamic analysis demonstrated that the adsorption process was endothermic, feasible, and spontaneous. Correspondently, the adsorption mechanism was explored by FTIR, SEM-EDS and XPS. The adsorbent was employed in disposing of local sewage water. Additionally, GSA successfully achieves efficient water/oil separation in different salt concentrations with a separation efficiency exceeding 99%.
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Affiliation(s)
- Yiping Wen
- Oil & Gas Field Applied Chemistry Key Laboratory of Sichuan Province, College of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu 610500, China; Research Institute of Industrial Hazardous Waste Disposal and Resource Utilization, Southwest Petroleum University, Chengdu 610500, China
| | - Zhengfeng Xie
- Oil & Gas Field Applied Chemistry Key Laboratory of Sichuan Province, College of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu 610500, China; Research Institute of Industrial Hazardous Waste Disposal and Resource Utilization, Southwest Petroleum University, Chengdu 610500, China.
| | - Songsong Xue
- Oil & Gas Field Applied Chemistry Key Laboratory of Sichuan Province, College of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu 610500, China; Research Institute of Industrial Hazardous Waste Disposal and Resource Utilization, Southwest Petroleum University, Chengdu 610500, China
| | - Wei Li
- Oil & Gas Field Applied Chemistry Key Laboratory of Sichuan Province, College of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu 610500, China; Research Institute of Industrial Hazardous Waste Disposal and Resource Utilization, Southwest Petroleum University, Chengdu 610500, China
| | - Hao Ye
- Oil & Gas Field Applied Chemistry Key Laboratory of Sichuan Province, College of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu 610500, China; Research Institute of Industrial Hazardous Waste Disposal and Resource Utilization, Southwest Petroleum University, Chengdu 610500, China
| | - Wei Shi
- Oil & Gas Field Applied Chemistry Key Laboratory of Sichuan Province, College of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu 610500, China
| | - Yucheng Liu
- Oil & Gas Field Applied Chemistry Key Laboratory of Sichuan Province, College of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu 610500, China; Research Institute of Industrial Hazardous Waste Disposal and Resource Utilization, Southwest Petroleum University, Chengdu 610500, China
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35
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Yao M, Chen T, Ran Z, Li T, Chen H, Li W. Integral evaluation of production safety and genotoxicity of recycling residual sludge for drinking water treatment plants. ENVIRONMENTAL TECHNOLOGY 2022; 43:1225-1236. [PMID: 32928064 DOI: 10.1080/09593330.2020.1824021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/23/2020] [Accepted: 08/14/2020] [Indexed: 06/11/2023]
Abstract
Recycling residual sludge in drinking water treatment plants (DWTPs) may release excessive heavy metals and organic matter, which are substances of concern because of their toxic and carcinogenic potential. The aim of this study was to investigate potential genotoxic, cytotoxic, and mutagenic effects of recycled residual sludge in terms of quality of water in potable water works. Genotoxic effects of reusing residual sludge were evaluated using: the Ames test, sperm abnormality test in mice, micronucleus assay, comet assay, and single-cell gel electrophoresis assay. The results of the Ames assay show that the disinfected water sample displays bacteriostasis at a dose of 7 L/dish regardless of treatment styles, but mutagenicity ratio (MR) < 2 can still be judged as negative. The micronucleus rates of conventional treatment were slightly genotoxic but only at 4 and 40 L/kg·bw, whereas micronucleus rates of filtered water and disinfectant from the recycling process were negative in all of the dose groups. The levels of DNA damage that are caused by different treatment processes were equivalent. Reusing residual sludge for DWTPs did not contribute to the release of genotoxic or mutagenic compounds, but it did have a remarkable effect on saving the drug dose and increasing drinking water yield. Thus, reusing residual sludge for DWTPs should be widely recommended.
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Affiliation(s)
- Meng Yao
- School of Traffic and Environment, Shenzhen Institute of Information Technology, Shenzhen, People's Republic of China
| | - Ting Chen
- Guangdong GDH Water Company Limited, Shenzhen, People's Republic of China
| | - Zhilin Ran
- School of Traffic and Environment, Shenzhen Institute of Information Technology, Shenzhen, People's Republic of China
| | - Ting Li
- Shenzhen Water Longgang Water (Group) Co., LTD., Shenzhen Institute of Information Technology, People's Republic of China
| | - Haisong Chen
- Shenzhen Water Longgang Water (Group) Co., LTD., Shenzhen Institute of Information Technology, People's Republic of China
| | - Wenjing Li
- School of Traffic and Environment, Shenzhen Institute of Information Technology, Shenzhen, People's Republic of China
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Rapid Removal of Acid Red 88 by Zeolite/Chitosan Hydrogel in Aqueous Solution. Polymers (Basel) 2022; 14:polym14050893. [PMID: 35267716 PMCID: PMC8912896 DOI: 10.3390/polym14050893] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2022] [Revised: 02/17/2022] [Accepted: 02/22/2022] [Indexed: 11/20/2022] Open
Abstract
In the present study, we developed a new adsorbent product with zeolite crosslinked chitosan (ZL–CH hydrogel) to remove acid red 88 (AR88) in an aqueous solution. The effects of several factors, such as the comparison of ZL–CH hydrogel and the absence of chitosan, pH, adsorbent dosage, initial AR88 concentration, contact time, and ion strength, were determined. Obtained results showed that ZL–CH hydrogel improved AR88 removal compared to the absence of chitosan, with an adsorption capacity of 332.48 mg/g in equilibrium time of 1 min, and adding ionic strength had no significant effect. However, with optimal conditions at pH 2.0, dry ZL–CH became hydrogel due to protonation of amino and hydroxyl groups through hydrogen bonds in the AR88 solution. Volume fraction and interaction force decreased with increasing porosity, leading to an increase in adsorption capacity and swelling ratio. Experimental data of the adsorption process showed the Freundlich isotherm model. The equilibrium for adsorption and swelling kinetics studies showed and fitted a pseudo-second-order model. NaOH was successful as a desorbing agent with 93.8%, and it followed the pseudo-second-order kinetics model. The recycling process indicates great potential for AR88 removal.
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Zhuo SN, Ren HY, Liu BF. In situ utilization of biomass pretreatment liquor as a novel flocculant for anion dyes removal: Performance and mechanism. JOURNAL OF HAZARDOUS MATERIALS 2022; 424:127737. [PMID: 34799152 DOI: 10.1016/j.jhazmat.2021.127737] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/09/2021] [Revised: 11/04/2021] [Accepted: 11/06/2021] [Indexed: 06/13/2023]
Abstract
In this work, it was first found biomass pretreatment liquor (PL) produced from rice straw (RS) pretreatment with FeCl3 and polyethylene glycol 400 co-solvent can be used in situ as a new flocculant to remove anionic dyes from wastewater. The removal performance of nine dyes was investigated using various PL doses at different pH values. The experiment indicated that the PL had different flocculation effects on these dyes (color removal efficiency: 42.58-99.84%). Positive color removal results for the dyes were unachievable with six commercial coagulants. Among the nine dyes treated by PL flocculation, the best removal efficiencies for color, turbidity and suspended matter were obtained for Congo red. In the flocculation process, Fe3+ plays a role in charge neutralization, lignin nanoparticles (LNP) relies on hydroxyl groups to react instantaneously with the amino groups on the dye, and are bridged together by π-π interactions to promote the formation of floc clusters until they completely settle. Utilization of PL as a flocculant helps pave the way to simultaneously treat waste biomass, waste treatment liquor and dye wastewater. This research is of great significance for future water environment remediation and material development.
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Affiliation(s)
- Sheng-Nan Zhuo
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Hong-Yu Ren
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Bing-Feng Liu
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, China.
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Responses of Coagulant Type, Dosage and Process Conditions to Phosphate Removal Efficiency from Anaerobic Sludge. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:ijerph19031693. [PMID: 35162716 PMCID: PMC8835144 DOI: 10.3390/ijerph19031693] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/10/2022] [Revised: 01/29/2022] [Accepted: 01/30/2022] [Indexed: 02/04/2023]
Abstract
Phosphorus, a crucial component of life, may cause eutrophication if it is discharged untreated into the aquatic ecosystem. Phosphate (PO43-) may exist at an elevated level in anaerobic digestion (AD) effluents and can lead to the clogging of pipes by forming struvite crystals. This study was conducted to assess the responses of coagulant type, dosage and process conditions to phosphate removal efficiency from anaerobic sludge. The experiments were performed in two steps. First, a sensitivity test was conducted to compare five coagulant types (alum, poly-aluminum chloride (PAC), FeCl2, FeCl3 and PAC + FeCl3) at standard coagulation conditions. The results showed that PAC would be the best coagulant among the tested, while a combination of PAC and FeCl3 may be beneficial under circumstances. Second, an optimization study was performed for PAC using response surface methodology employing central composite design. Among the three independent variables (coagulant dosage, slow mixing duration and agitation speed), the dosage was the sole significant variable for phosphate removal efficiency, while the other two had limited effects. A future study to optimize the rapid mixing conditions would give additional insights into the process. The results of this study may be useful to design a process to counteract phosphate discharges from AD plants, as well as to reduce the risks of pipe clogging and maintenance problems due to crystalline struvite formation in the later stage of AD.
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Wu Z, Zhang P, Zhang H, Li X, He Y, Qin P, Yang C. Tough porous nanocomposite hydrogel for water treatment. JOURNAL OF HAZARDOUS MATERIALS 2022; 421:126754. [PMID: 34388914 DOI: 10.1016/j.jhazmat.2021.126754] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/29/2021] [Revised: 07/20/2021] [Accepted: 07/25/2021] [Indexed: 06/13/2023]
Abstract
Developing a cost-effective, stable, and recyclable adsorbent with high adsorption capacity and rapid adsorption kinetics is highly demanded for water treatment but has been proven challenging. Herein, we report a one-step strategy to synthesize tough porous nanocomposite hydrogel, by introducing biochar nanoparticles and interconnected pores into a polyacrylamide hydrogel matrix as an exemplary system. The polyacrylamide hydrogel provides the overall mechanical strength to carry loads and facilitate recycling, the biochar provides adsorptive locus for high adsorption capacity, and the interconnected pores expedite solvent transport for rapid adsorption kinetics. Mechanical characterizations manifest that the porous biochar hydrogel possesses a tensile strength of 128 kPa, a stretchability of 5.9, and a toughness of 538 J m-2. Porous structure analysis reveals that the hydrogel contains an increscent specific surface area by 441% and an augmented pore volume by 279% compared to pure polyacrylamide hydrogel. Experiments pertaining to adsorption isotherms and kinetics, with methylene blue as the model adsorbate, indicate enhanced adsorption performances. The tough hydrogel also allows facile recycling and maintains mechanical robustness after five regeneration cycles. Furthermore, biocompatibility is endorsed by cytotoxicity test. The proposed method could open an ample space for designing and synthesizing tough porous nanocomposite hydrogels for water treatment.
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Affiliation(s)
- Zhiying Wu
- Department of Mechanics and Aerospace Engineering, Southern University of Science and Technology, Shenzhen 518055, China; Department of Chemistry, City University of Hong Kong, Hong Kong SAR
| | - Ping Zhang
- Department of Mechanics and Aerospace Engineering, Southern University of Science and Technology, Shenzhen 518055, China
| | - Haihui Zhang
- Institute of Biopharmaceutical and Health Engineering, Tsinghua Shenzhen International Graduate School, Tsinghua University, 518055 Shenzhen, Guangdong, China
| | - Xiaotian Li
- Department of Mechanics and Aerospace Engineering, Southern University of Science and Technology, Shenzhen 518055, China
| | - Yunfeng He
- Department of Mechanics and Aerospace Engineering, Southern University of Science and Technology, Shenzhen 518055, China
| | - Peiwu Qin
- Institute of Biopharmaceutical and Health Engineering, Tsinghua Shenzhen International Graduate School, Tsinghua University, 518055 Shenzhen, Guangdong, China
| | - Canhui Yang
- Department of Mechanics and Aerospace Engineering, Southern University of Science and Technology, Shenzhen 518055, China.
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Sharma B, Kumari N, Mathur S, Sharma V. A systematic review on iron-based nanoparticle-mediated clean-up of textile dyes: challenges and prospects of scale-up technologies. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:312-331. [PMID: 34665422 DOI: 10.1007/s11356-021-16846-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/14/2021] [Accepted: 09/28/2021] [Indexed: 06/13/2023]
Abstract
The projected increase of the global textile industry to USD1002.84 billion in 2027 indicates a simultaneous increase in water pollution due to textile dye-rich voluminous effluents highlighting the requirement of source clean-up. This review analyzes the colossal amount of literature on lab-scale nanoremediation technologies involving iron-based nanoparticles and the mechanistic aspects. However, not many studies are in place with regard to execution because there are several bottlenecks in the scale-up of the technology. This review attempts to identify the limitations of scale-up by focusing on each step of nanoremediation from synthesis of iron-based nanoparticles to their applications. The most prominent appears to be the low economic viability of physico-chemical synthesis of nanoparticles, lack of appropriate toxicity studies of iron-based nanoparticles, and dearth of studies on field applications. It is recommended that above studies should be made not only on lab scale but also on field samples preferably utilizing microbial products based green synthesized iron-based nanoparticles and conducting toxicity studies. Besides, immobilization of the nanoparticles on renewable material greatly enhances the sustainability and economic value of the process. Furthermore, since the chemical composition of dye-rich effluents varies among industries, effluent specific optimization of process parameters and kinetics thereof is also a major prerequisite for scale-up. The value of this review lies in the fact that it brings, for the first time, a comprehensive and critical systematization of various aspects needing attention in order to scale-up such effective nanoremediation processes.
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Affiliation(s)
- Baby Sharma
- Amity Institute of Biotechnology, Amity University Rajasthan, SP-1 Kant Kalwar, NH11C, RIICO Industrial Area, Jaipur, Rajasthan, 303007, India
| | - Nilima Kumari
- Department of Bioscience and Biotechnology, Banasthali Vidyapith, Rajasthan, 304022, India
| | - Shruti Mathur
- Amity Institute of Biotechnology, Amity University Rajasthan, SP-1 Kant Kalwar, NH11C, RIICO Industrial Area, Jaipur, Rajasthan, 303007, India
| | - Vinay Sharma
- Amity Institute of Biotechnology, Amity University Rajasthan, SP-1 Kant Kalwar, NH11C, RIICO Industrial Area, Jaipur, Rajasthan, 303007, India.
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41
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Singh Yadav B, Dasgupta S. Effect of Time, pH, and Temperature on Kinetics for Adsorption of methyl orange Dye into the Modified Nitrate Intercalated MgAl LDH Adsorbent. INORG CHEM COMMUN 2022. [DOI: 10.1016/j.inoche.2022.109203] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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Al-Salihi S, Jasim AM, Fidalgo MM, Xing Y. Removal of Congo red dyes from aqueous solutions by porous γ-alumina nanoshells. CHEMOSPHERE 2022; 286:131769. [PMID: 34365171 DOI: 10.1016/j.chemosphere.2021.131769] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/13/2021] [Revised: 07/13/2021] [Accepted: 07/31/2021] [Indexed: 06/13/2023]
Abstract
Porous alumina has been shown to be an excellent adsorbent for Congo Red (CR) dye. In this work, highly porous g-Al2O3 nanoshells were synthesized from alumina coated carbon black (CB) obtained from a new deposition technique and used for removal of CR dye from aqueous solutions. Adsorption experiments were conducted in a batch mode and a series of parameters were investigated, including contact time, initial dye concentrations, ionic strength and pH of the solutions. It was found that equilibrium for CR adsorption can be reached within 30 min, much faster than reported by other studies in the literature on similar adsorbents. It was also found that the adsorption capacity of Al2O3 nanoshells is 44.8 % higher than that of alumina/CB. The adsorption capacity of Al2O3 nanoshells was more favorable at lower pH, and the optimal adsorption ability was achieved at pH 4.0 with a removal efficiency at 98.6 %. The Al2O3 nanoshells have a maximum adsorption capacity of 370.4 mg g-1 (25 °C; pH 7; no salt added), better than or comparable to those reported in the literature. A pseudo-second-order kinetics model can best fit the kinetics of CR adsorption, which follows the Langmuir isotherm. The high adsorption capacity is attributed to the strong hydrogen-bonding interactions between the anionic dye and Al2O3 nanoshells surface as well as to the electrostatic interactions between CR dye and the Al2O3 nanoshells.
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Affiliation(s)
- Sara Al-Salihi
- Department of Biomedical, Biological & Chemical Engineering, University of Missouri, Columbia, 65211, United States
| | - Ahmed M Jasim
- Department of Biomedical, Biological & Chemical Engineering, University of Missouri, Columbia, 65211, United States
| | - Maria M Fidalgo
- Department of Civil & Environmental Engineering, University of Missouri, Columbia, 65211, United States
| | - Yangchuan Xing
- Department of Biomedical, Biological & Chemical Engineering, University of Missouri, Columbia, 65211, United States.
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Aadnan I, Zegaoui O, El Mragui A, Esteves da Silva JCG. Physicochemical and Photocatalytic Properties under Visible Light of ZnO-Bentonite/Chitosan Hybrid-Biocompositefor Water Remediation. NANOMATERIALS 2021; 12:nano12010102. [PMID: 35010050 PMCID: PMC8746606 DOI: 10.3390/nano12010102] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/01/2021] [Revised: 12/27/2021] [Accepted: 12/27/2021] [Indexed: 11/16/2022]
Abstract
In this investigation, a hybrid-biocomposite "ZnO-Bentonite/Chitosan" was synthesized using inexpensive and environmentally friendly materials (Bentonitechitosan) and (ZnO). It was used as a photocatalyst for water remediation. The structural, optical, thermal, and morphological properties of the synthesized hybrid-biocomposite were investigated using XRD, FTIR spectroscopy, UV-vis diffuse reflectance spectroscopy, TGA, XPS, and SEM-EDS. The thermal measurements showed that the decomposition of CS was postponed progressively by adding PB and ZnO, and the thermal stability of the synthesized hybrid-biocomposite was improved. The characterization results highlighted strong interactions between the C-O, C=O, -NH2, and OH groups of chitosan and the alumina-silica sheets of bentonite on the one side, and between the functional groups of chitosan (-NH2, OH) and ZnO on the other side. The photocatalytic efficiency of the prepared hybrid-biocomposite was assessed in the presence of Methyl Orange (MO). The experiments carried out in the dark showed that the MO removal increased in the presence of Zn-PB/CS hybrid-biocomposite (86.1%) by comparison with PB (75.8%) and CS (65.4%) materials. The photocatalytic experiments carried out under visible light showed that the MO removal increased 268 times in the presence of Zn-PB/CS by comparison withZnO.The holes trapping experiments indicated that they are the main oxidative active species involved in the MO degradation under both UV-A and visible light irradiations.
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Affiliation(s)
- Imane Aadnan
- Research Team “Materials and Applied Catalysis: MCA”, CBAE Laboratory, URL-CNRST N°13, Faculty of Sciences, Moulay Ismail University of Meknes, P.O. Box 11201 Zitoune, Meknès 50700, Morocco; (I.A.); (A.E.M.)
| | - Omar Zegaoui
- Research Team “Materials and Applied Catalysis: MCA”, CBAE Laboratory, URL-CNRST N°13, Faculty of Sciences, Moulay Ismail University of Meknes, P.O. Box 11201 Zitoune, Meknès 50700, Morocco; (I.A.); (A.E.M.)
- Correspondence:
| | - Abderrahim El Mragui
- Research Team “Materials and Applied Catalysis: MCA”, CBAE Laboratory, URL-CNRST N°13, Faculty of Sciences, Moulay Ismail University of Meknes, P.O. Box 11201 Zitoune, Meknès 50700, Morocco; (I.A.); (A.E.M.)
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Ikram M, Imran M, Hayat S, Shahzadi A, Haider A, Naz S, Ul-Hamid A, Nabgan W, Fazal I, Ali S. MoS 2/cellulose-doped ZnO nanorods for catalytic, antibacterial and molecular docking studies. NANOSCALE ADVANCES 2021; 4:211-225. [PMID: 36132956 PMCID: PMC9417535 DOI: 10.1039/d1na00648g] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/24/2021] [Accepted: 10/30/2021] [Indexed: 05/31/2023]
Abstract
Cellulose nanocrystals (CNCs) and molybdenum disulphide (MoS2) incorporated into ZnO nanorods (NRs) were synthesized via a chemical precipitation route at room temperature. All concerned samples were characterized to examine their optical properties, elemental composition, phase formation, surface morphology and functional group presence. The aim of this research was to enhance the catalytic properties of ZnO by co-doping with various concentrations of CNCs and MoS2 NRs. It was renowned that doped ZnO NRs showed superior catalytic activity compared to bare ZnO NRs. Statistically significant (p < 0.05) inhibition zones for samples were recorded for E. coli and S. aureus at low and high concentrations, respectively. The in vitro bactericidal potential of ZnO-CNC and ZnO-CNC-MoS2 nanocomposites was further confirmed through in silico molecular docking predictions against the DHFR and DHPS enzymes of E. coli and S. aureus. Molecular docking studies suggested the inhibition of these enzyme targets by CNC nanocomposites as a possible mechanism governing their bactericidal activity.
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Affiliation(s)
- Muhammad Ikram
- Solar Cell Application Research Lab, Department of Physics, Government College University Lahore Lahore 54000 Punjab Pakistan
| | - Muhammad Imran
- State Key Laboratory of Chemical Resource Engineering, Beijing Advanced Innovation Centre for Soft Matter Science and Engineering, Beijing Engineering Center for Hierarchical Catalysts, Beijing University of Chemical Technology Beijing 100029 China
| | - Shoukat Hayat
- Department of Physics, Riphah Institute of Computing and Applied Sciences (RICAS), Riphah International University 14 Ali Road Lahore Pakistan
| | - Anum Shahzadi
- Faculty of Pharmacy, University of the Lahore Lahore Pakistan
| | - Ali Haider
- Department of Clinical Medicine and Surgery, University of Veterinary and Animal Sciences Lahore 54000 Punjab Pakistan
| | - Sadia Naz
- Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences Tianjin 300308 China
| | - Anwar Ul-Hamid
- Core Research Facilities, King Fahd University of Petroleum & Minerals Dhahran 31261 Saudi Arabia
| | - Walid Nabgan
- School of Chemical and Energy Engineering, Faculty of Engineering, Universiti Teknologi Malaysia 81310 Skudai Johor Malaysia
| | - Iqra Fazal
- Department of Physics, Riphah Institute of Computing and Applied Sciences (RICAS), Riphah International University 14 Ali Road Lahore Pakistan
| | - Salamat Ali
- Department of Physics, Riphah Institute of Computing and Applied Sciences (RICAS), Riphah International University 14 Ali Road Lahore Pakistan
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Suquet J, Godo-Pla L, Valentí M, Ferràndez L, Verdaguer M, Poch M, Martín MJ, Monclús H. Assessing the effect of catchment characteristics to enhanced coagulation in drinking water treatment: RSM models and sensitivity analysis. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 799:149398. [PMID: 34375875 DOI: 10.1016/j.scitotenv.2021.149398] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/04/2021] [Revised: 07/09/2021] [Accepted: 07/28/2021] [Indexed: 06/13/2023]
Abstract
Coagulation is the main process for removing natural organic matter (NOM), considered to be the major disinfection by-products (DBPs) precursor in drinking water production. In this work, k-means clusters analysis were used to classify influent waters from two different surface drinking water treatment plants (DWTPs) located in the Mediterranean region. From this, enhanced coagulation models based on response surface methodology (RSM) were then developed to optimise coagulation at two water catchments (river and reservoir). The cluster analysis classified the water quality of the raw waters into two groups related to baseline and peak organic loads. The developed enhanced coagulation models were based on the turbidity, total organic carbon (TOC) and UV254 removals. Sensitivity analysis applied to the models (after predictors selection) determined the factors relative individual contributions for each DWTP scenario. Then, profile plots for enhanced coagulation were studied to identify the optimal levels for each case. Models mean R2 were 0.85 and 0.86 in baseline and 0.85 and 0.84 in peak scenario for river and reservoir catchments, respectively. Results of this study indicate that the surface water quality variation in river DWTP is seasonal and is expressed by an increase of turbidity, while in the reservoir DWTP is related to extreme weather events showing high levels of dissolved organic load (TOC and UV254). During baseline cases, where raw waters present low levels of organics, the three factors optimal adjustment should be ensured to optimise coagulation. Then, during peak scenarios, where influent waters present high organics, the optimal for enhanced coagulation relies on the correct adjustment of Cd. The presented work provides models for drinking water production aimed to propose the optimum conditions for enhanced coagulation, considering the influent water characteristics under different weather conditions.
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Affiliation(s)
- J Suquet
- LEQUIA, Institute of the Environment, Universitat de Girona. C/Maria Aurèlia Capmany, 69, E-17003 Girona, Catalonia, Spain
| | - Ll Godo-Pla
- LEQUIA, Institute of the Environment, Universitat de Girona. C/Maria Aurèlia Capmany, 69, E-17003 Girona, Catalonia, Spain
| | - M Valentí
- LEQUIA, Institute of the Environment, Universitat de Girona. C/Maria Aurèlia Capmany, 69, E-17003 Girona, Catalonia, Spain
| | - L Ferràndez
- LEQUIA, Institute of the Environment, Universitat de Girona. C/Maria Aurèlia Capmany, 69, E-17003 Girona, Catalonia, Spain
| | - M Verdaguer
- LEQUIA, Institute of the Environment, Universitat de Girona. C/Maria Aurèlia Capmany, 69, E-17003 Girona, Catalonia, Spain
| | - M Poch
- LEQUIA, Institute of the Environment, Universitat de Girona. C/Maria Aurèlia Capmany, 69, E-17003 Girona, Catalonia, Spain
| | - M J Martín
- LEQUIA, Institute of the Environment, Universitat de Girona. C/Maria Aurèlia Capmany, 69, E-17003 Girona, Catalonia, Spain
| | - H Monclús
- LEQUIA, Institute of the Environment, Universitat de Girona. C/Maria Aurèlia Capmany, 69, E-17003 Girona, Catalonia, Spain.
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Altun EY, Şişmanoğlu ZT, Pozan Soylu GS. Photocatalytic decomposition of textile dyestuffs by photosensitive metal oxide catalysts. Turk J Chem 2021; 45:1432-1443. [PMID: 34849057 PMCID: PMC8596523 DOI: 10.3906/kim-2104-30] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2021] [Accepted: 06/16/2021] [Indexed: 11/26/2022] Open
Abstract
Textile azo dyes are one of the pollutants in waste water that adversely affect human and environmental health. Removal of these chemicals from wastewater is important for eco-system and human health. In this study, Bi2O3 nanoflakes and ZnO were synthesized by the co-precipitation method. Adsorption and photocatalytic degradation reactions were carried out to remove dyes (Victoria blue (VB) and Malachite green (MG)) from wastewater with the photocatalysts. In order to improve the activity of catalysts, cetyltrimethylammoniumbromide (CTAB) was added as a surfactant to pure oxide structures, and Bi2O3-CTAB and ZnO-CTAB catalysts were prepared. The structural and morphological properties of these catalysts were determined by BET, XRD, DRS, FTIR, and SEM analysis. It was found that the activity of the catalyst was improved by adding surfactant to the Bi2O3. The total mineralization of VB dye was completed in 60 min under sunlight with Bi2O3-CTAB catalyst. However, the degradation of the MG dye with the same catalyst under UV-C irradiation could be completed in 120 min.
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Affiliation(s)
- Esra Yeliz Altun
- Department of Chemical Engineering, Engineering Faculty, İstanbul University-Cerrahpaşa, İstanbul Turkey
| | - Z Tuba Şişmanoğlu
- Department of Chemistry, Engineering Faculty, Istanbul University-Cerrahpasa, Istanbul Turkey
| | - Gülin Selda Pozan Soylu
- Department of Chemical Engineering, Engineering Faculty, İstanbul University-Cerrahpaşa, İstanbul Turkey
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47
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Maridevaru MC, Anandan S, Aljafari B, Wu JJ. LaCo xFe 1-XO 3 (0≤x≤1) spherical nanostructures prepared via ultrasonic approach as photocatalysts. ULTRASONICS SONOCHEMISTRY 2021; 80:105824. [PMID: 34763211 PMCID: PMC8591478 DOI: 10.1016/j.ultsonch.2021.105824] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/27/2021] [Revised: 10/22/2021] [Accepted: 11/03/2021] [Indexed: 05/02/2023]
Abstract
To harvest the photon energy, a sequenceof perovskite-type oxides of LaCoxFe1-xO3 (0 ≤x≤1) nanostructures with distinct 'Cobalt' doping at the position of B-site are successfully prepared via a simple ultrasonic approach as photocatalyst. The crystallinity, phase identification, microstructure, and morphology of perovskite nanocomposites were analyzed to better understand their physicochemical properties. The catalytic efficiency was assessedusing Congo Red (CR) dye by visible light irradiation for 30 min. Applying terephthalic acid as a probe molecule, the formation of hydroxyl radicals during the processes was investigated. The photocatalytic efficacy was measured by varying different Co/Fe stoichiometric molar ratios and noticed the order of sequence is 0.2 > 0.6 > 0.4 > 0.8 > 0.5 > 0 > 1 after 30 min of reaction time. Finally using LaCo0.2Fe0.8O3 nanostructures, cycling studies (n = 3) were performed to determine its photostability and reusability. The photocatalytic methodology proposed in this study was discussed extensively.
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Affiliation(s)
- Madappa C Maridevaru
- Nanomaterials and Solar Energy Conversion Lab, Department of Chemistry, National Institute of Technology, Trichy 620015, India
| | - Sambandam Anandan
- Nanomaterials and Solar Energy Conversion Lab, Department of Chemistry, National Institute of Technology, Trichy 620015, India.
| | - Belqasem Aljafari
- Department of Electrical Engineering, College of Engineering, Najran University, Najran 11001, Saudi Arabia
| | - Jerry J Wu
- Department of Environmental Engineering and Science, Feng Chia University, Taichung 407, Taiwan
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Muslim M, Ali A, Neogi I, Dege N, Shahid M, Ahmad M. Facile synthesis, topological study, and adsorption properties of a novel Co (II)-based coordination polymer for adsorptive removal of methylene blue and methyl orange dyes. Polyhedron 2021. [DOI: 10.1016/j.poly.2021.115519] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Sustainable Durio zibethinus-Derived Biosorbents for Congo Red Removal from Aqueous Solution: Statistical Optimization, Isotherms and Mechanism Studies. SUSTAINABILITY 2021. [DOI: 10.3390/su132313264] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
This investigation reports on the biosorption mechanism of Congo Red dyes (CR) in aqueous solution using acid-treated durian peels, prepared for this study. The biosorbent nature was characterized using the Scanning Electron Microscopy (SEM), Fourier Transform infrared spectroscopy (FT-IR) and Brunaure-Emmet-Teller (BET). The effect of process parameters within operational range of pH (2–9), contact time (10–200 min), initial concentration (25–400 mg g−1) and temperature (25–65 °C) for the optimum removal of CR dyes was investigated using central composite design (CCD) under response surface methodology (RSM), and revealed that the optimum condition of biosorption was achieved around a pH of 5.5, contact time of 105 min at initial concentration of 212.5 mg L−1 within 45 °C temperature, which corresponds to 95.2% percent removal of CR. The experimental data fitted better to the second order polynomial model, with a correlation coefficient R2 value of 0.9917 and the Langmuir isotherm model with biosorption capacity of 107.52 mg g−1. Gibbs free energy indicated that the adsorption of CR dyes was spontaneous. The mechanism of the adsorption of CR dyes revealed that the biosorption of CR dyes investigated under different operational conditions show that under acidic pH, the adsorption efficiency of the acid treated durian peels is enhanced for the adsorption of CR dye molecules.
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Electrochemical Recovery to Overcome Direct Osmosis Concentrate-Bearing Lead: Optimization of Treatment Process via RSM-CCD. WATER 2021. [DOI: 10.3390/w13213136] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
The use of electrochemistry is a promising approach for the treatment of direct osmosis concentrate that contains a high concentration of organic pollutants and has high osmotic pressure, to achieve the safe discharge of effluent. This work addresses, for the first time, this major environmental challenge using perforated aluminum electrodes mounted in an electrocoagulation–flotation cell (PA-ECF). The design of the experiments, the modeling, and the optimization of the PA-ECF conditions for the treatment of DO concentrate rich in Pb were explored using a central composite design (CCD) under response surface methodology (RSM). Therefore, the CCD-RSM was employed to optimize and study the effect of the independent variables, namely electrolysis time (5.85 min to 116.15 min) and current intensity (0.09 A to 2.91 A) on Pb removal. Optimal values of the process parameters were determined as an electrolysis time of 77.65 min and a current intensity of 0.9 A. In addition to Pb removal (97.8%), energy consumption, electrode mass-consumed material, and operating cost were estimated as 0.0025 kWh/m3, 0.217 kg Al/m3, and 0.423 USD/m3, respectively. In addition, it was found that DO concentrate obtained from metallurgical wastewater can be recovered through PA-ECF (almost 94% Pb removal). This work demonstrated that the PA-ECF technique could became a viable process applicable in the treatment of DO concentrate containing Pb-rich for reuse.
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