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Ani I, Akpan U, Olutoye M, Hameed B, Egbosiuba T. Adsorption-photocatalysis synergy of reusable mesoporous TiO 2-ZnO for photocatalytic degradation of doxycycline antibiotic. Heliyon 2024; 10:e30531. [PMID: 38726123 PMCID: PMC11079255 DOI: 10.1016/j.heliyon.2024.e30531] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2023] [Revised: 04/09/2024] [Accepted: 04/29/2024] [Indexed: 05/12/2024] Open
Abstract
The potentials of mesoporous TiO2-ZnO (3TiZn) were explored on photocatalytic degradation of doxycycline (DOX) antibiotic, likewise the influence of adsorption on the photocatalytic process. The 3TiZn was characterized for physical and chemical properties. Stability, reusability, kinetic and the ability of 3TiZn to degrade high concentration of pollutant under different operating conditions were investigated. Photocatalytic degradation of DOX was conducted at varied operating conditions, and the best was obtained at 1 g/L catalyst dosage, solution inherent pH (4.4) and 50 ppm of DOX. Complete degradation of 50 ppm and 100 ppm of DOX were attained within 30 and 100 min of the reaction time, respectively. The stability and reusability study of the photocatalyst proved that at the tenth (10th) cycle, the 3TiZn is as effective in the degradation of DOX as in the first cycle. This may be attributed to the fusion of the mixed oxides during calcination. The 3TiZn is mesoporous with a pore diameter of 17 nm, and this boosts it potential to degrade high concentration of DOX. It was observed that the adsorption capacity of 3TiZn enhance the photocatalytic process. It can be emphasized that 3TiZn portrayed a remarkable catalyst stability and good potentials for industrial application.
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Affiliation(s)
- I.J. Ani
- Department of Chemical Engineering, Federal University of Technology, Minna, Nigeria
- School of Chemical Engineering, University of Science Malaysia, Penang, Malaysia
- Department of Chemical Engineering, Nasarawa State University, Keffi, Nigeria
| | - U.G. Akpan
- Department of Chemical Engineering, Federal University of Technology, Minna, Nigeria
| | - M.A. Olutoye
- Department of Chemical Engineering, Federal University of Technology, Minna, Nigeria
| | - B.H. Hameed
- Department of Chemical Engineering, College of Engineering, Qatar University, Doha, Qatar
| | - T.C. Egbosiuba
- Department of Chemical Engineering, Chukwuemeka Odumegwu Ojukwu University, Uli Campus, Anambra, Nigeria
- Department of Engineering Technology and Industrial Distribution, Texas A&M University, College Station, TX, 77843, USA
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Wagdy R, Mubarak MF, Mohamed RS, El Shahawy A. Industrial-scale feasibility for textile wastewater treatment via Photocatalysis-adsorption technology using black sand and UV lamp. RSC Adv 2024; 14:10776-10789. [PMID: 38572348 PMCID: PMC10988593 DOI: 10.1039/d4ra00421c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2024] [Accepted: 03/14/2024] [Indexed: 04/05/2024] Open
Abstract
Dye-contaminated wastewater is a major environmental problem that requires effective and affordable treatment methods. This study investigates an innovative approach using black sand filtration assisted by UV light to remove methylene blue (MB) dye from wastewater. The motivation is to develop a sustainable low-cost wastewater treatment technology. Black sand's composition of iron oxide and other metal oxides enables the adsorption and photocatalytic degradation of dyes. The effects of operating parameters, including pH, bed height, flow rate, and initial MB concentration, were examined using a fixed-bed column system. The maximum adsorption capacity was 562.43 mg g-1 at optimal pH 10, 15 cm bed height, 50 ppm MB, and 53.33 mL min-1 flow rate. Mathematical models effectively described the experimental breakthrough curves. For real textile wastewater, black sand with a UV lamp removed 50.40% COD, 73.68% TDS, 43.82% TSS, and 98.57% conductivity, significantly outperforming filtration without UV assistance. Characterization via XRD, XRF, FTIR, zeta potential, and SEM revealed black sand's photocatalytic properties and mechanism of MB adsorption. The findings demonstrate black sand filtration plus UV irradiation as a feasible, sustainable technology for removing dyes and organics from wastewater. This method has promise for the scale-up treatment of textiles and other industrial effluents.
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Affiliation(s)
- Rabab Wagdy
- Environmental Engineering Department, Faculty of Engineering, Zagazig University Postal code 44519 Zagazig Egypt
| | - Mahmoud F Mubarak
- Petroleum Applications Department, Egyptian Petroleum Research Institute (EPRI) Nasr City Cairo 11727 Egypt
| | - Rasha S Mohamed
- Refining Division, Egyptian Petroleum Research Institute 1 Ahmed El-Zomor St., Nasr City 11727 Cairo Egypt
| | - Abeer El Shahawy
- Department of Civil Engineering, Faculty of Engineering, Suez Canal University, Environmental Engineering P.O. Box 41522 Ismailia Egypt
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3
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Bassi A, Kanungo K, Koo BH, Hasan I. Cellulose nanocrystals doped silver nanoparticles immobilized agar gum for efficient photocatalytic degradation of malachite green. Int J Biol Macromol 2023:125221. [PMID: 37295693 DOI: 10.1016/j.ijbiomac.2023.125221] [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: 03/28/2023] [Revised: 05/25/2023] [Accepted: 06/02/2023] [Indexed: 06/12/2023]
Abstract
The present study involves the synthesis of green functional material based on the silver nanoparticle (Ag NPs) doped cellulose nanocrystals (CNC) immobilized agar gum (AA) biopolymer using chemical coprecipitation method. The stabilization of Ag NPs in cellulose matrix and functionalization of the synthesized material through agar gum was analyzed using various spectroscopic techniques such as Fourier Transform Infrared (FTIR), Scanning electron microscope (SEM), Energy X-Ray diffraction (EDX), Photoelectron X-ray (XPS), Transmission electron microscope (TEM), Selected area energy diffraction (SAED) and ultraviolet visible (UV-Vis) spectroscopy. The XRD results suggested that the synthesized AA-CNC@Ag BNC material is composed of 47 % crystalline and 53 % amorphous nature having distorted hexagonal structure due to capping of Ag NPs by amorphous biopolymer matrix. The Debye-Scherer crystallite sized was calculated as 18 nm which is found in close agreement with TEM analysis (19 nm). The SAED yellow fringes simulates the miller indices values with XRD patterns and supported the surface functionalization of Ag NPs by biopolymer blend of AA-CNC. The XPS data supported the presence of Ag0 as indexed by Ag3d orbital corresponding to Ag3d3/2 at 372.6 eV and Ag3d5/2 at 366.6 eV. The surface morphological results revealed a flaky surface of the resultant material having well distributed Ag NPs in the matrix. The EDX and atomic concentration results given by XPS supported the presence if C, O and Ag in the bionanocomposite material. The UV-Vis results suggested that the material is both UV and visible light active having multiple SPR effects with anisotropy. The material was explored as a photocatalyst for remediation of wastewater contaminated by malachite green (MG) using advance oxidation process (AOP). Photocatalytic experiments were performed in order to optimize various reaction parameters such as irradiation time, pH, catalyst dose and MG concentration. The obtained results showed that almost 98.85 % of MG was degraded by using 20 mg of catalyst at pH 9 for 60 min of irradiation. The trapping experiments revealed that •O2- radicals played primary role in MG degradation. This study will provide new possible strategies for the remediation of wastewater contaminated by MG.
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Affiliation(s)
- Akshara Bassi
- Environmental Research Lab, Department of Chemistry, Chandigarh University, Mohali, Punjab 140413, India
| | - Kushal Kanungo
- Environmental Research Lab, Department of Chemistry, Chandigarh University, Mohali, Punjab 140413, India
| | - Bon Heun Koo
- School of Materials Science and Engineering, Changwon National University, Changwon 51140, Gyeongnam, South Korea.
| | - Imran Hasan
- Department of Chemistry, College of Science, King Saud University, Riyadh 11451, Saudi Arabia.
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4
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Martins Almeida M, Aparecida Saczk A, da Silva Felix F, Silva Penido E, Aparecida Ribeiro Santos T, de Souza Teixeira A, Magalhães F. Characterization of electric arc furnace dust and its application in photocatalytic reactions to degrade organic contaminants in synthetic and real samples. J Photochem Photobiol A Chem 2023. [DOI: 10.1016/j.jphotochem.2023.114585] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
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Herrera-Ibarra LM, Ramírez-Zamora RM, Martín-Domínguez A, Piña-Soberanis M, Schnabel-Peraza D, Bañuelos-Díaz JA. Treatment of Textile Industrial Wastewater by the Heterogeneous Solar Photo-Fenton Process Using Copper Slag. Top Catal 2022. [DOI: 10.1007/s11244-022-01685-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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6
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Chen Z, Wei W, Chen H, Ni BJ. Recent advances in waste-derived functional materials for wastewater remediation. ECO-ENVIRONMENT & HEALTH (ONLINE) 2022; 1:86-104. [PMID: 38075525 PMCID: PMC10702907 DOI: 10.1016/j.eehl.2022.05.001] [Citation(s) in RCA: 23] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/13/2022] [Revised: 04/28/2022] [Accepted: 05/08/2022] [Indexed: 01/17/2024]
Abstract
Water pollution is a major concern for public health and a sustainable future. It is urgent to purify wastewater with effective methods to ensure a clean water supply. Most wastewater remediation techniques rely heavily on functional materials, and cost-effective materials are thus highly favorable. Of great environmental and economic significance, developing waste-derived materials for wastewater remediation has undergone explosive growth recently. Herein, the applications of waste (e.g., biowastes, electronic wastes, and industrial wastes)-derived materials for wastewater purification are comprehensively reviewed. Sophisticated strategies for turning wastes into functional materials are firstly summarized, including pyrolysis and combustion, hydrothermal synthesis, sol-gel method, co-precipitation, and ball milling. Moreover, critical experimental parameters within different design strategies are discussed. Afterward, recent applications of waste-derived functional materials in adsorption, photocatalytic degradation, electrochemical treatment, and advanced oxidation processes (AOPs) are analyzed. We mainly focus on the development of efficient functional materials via regulating the internal and external characteristics of waste-derived materials, and the material's property-performance correlation is also emphasized. Finally, the key future perspectives in the field of waste-derived materials-driven water remediation are highlighted.
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Affiliation(s)
- Zhijie Chen
- Center for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology Sydney, NSW, 2007, Australia
| | - Wei Wei
- Center for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology Sydney, NSW, 2007, Australia
| | - Hong Chen
- State Environmental Protection Key Laboratory of Integrated Surface Water-Groundwater Pollution Control, Shenzhen Key Laboratory of Interfacial Science and Engineering of Materials, School of Environmental Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, China
| | - Bing-Jie Ni
- Center for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology Sydney, NSW, 2007, Australia
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Synthesis of Polyaniline Supported CdS/CdS-ZnS/CdS-TiO 2 Nanocomposite for Efficient Photocatalytic Applications. NANOMATERIALS 2022; 12:nano12081355. [PMID: 35458061 PMCID: PMC9032629 DOI: 10.3390/nano12081355] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/09/2022] [Revised: 04/08/2022] [Accepted: 04/12/2022] [Indexed: 02/04/2023]
Abstract
Photocatalytic degradation can be increased by improving photo-generated electrons and broadening the region of light absorption through conductive polymers. In that view, we have synthesized Polyaniline (PANI) with CdS, CdS-ZnS, and CdS-TiO2 nanocomposites using the chemical precipitation method, characterized and verified for the photo-degradation of Acid blue-29 dye. This paper provides a methodical conception about in what way conductive polymers “PANI” enhances the performance rate of composite photocatalysts (CdS, CdS-ZnS and CdS-TiO2). The nanocomposites charge transfer, molar ratio, surface morphology, particle size, diffraction pattern, thermal stability, optical and recombination of photo-generated charge carrier properties were determined. The production of nanocomposites and their efficient photocatalytic capabilities were observed. The mechanism of photocatalysis involved with PC, CZP and CTP nanocomposites are well presented by suitable diagrams representing the exchange of electrons and protons among themselves with supported equations. We discovered that increasing the number of nanocomposites in the membranes boosted both photocatalytic activity and degradation rate. CdS-Zinc-PANI (CZP) and CdS-TiO2-PANI(CTP) nanocomposites show entrapment at the surface defects of Zinc and TiO2 nanoparticles due to the demolition of unfavorable electron kinetics, and by reducing the charge recombination, greater photocatalytic activity than CdS-PANI (CP) with the same nanoparticle loading was achieved. With repeated use, the photocatalysts’ efficiency dropped very little, hinting that they may be used to remove organic pollutants from water. The photocatalytic activity of CZP and CTP photocatalytic membranes was greater when compared to CdS-PANI, which may be due to the good compatibility between CdS and Zinc and TiO2, as well efficient charge carrier separation. PANI can also increase the split-up of photo-excited charge carriers and extend the absorption zone when combined with these nanoparticles. As a result, the development of outrageous performance photocatalysts and their potential uses in ecological purification and solar power conversion has been facilitated. The novelty of this article is to present the degradation of AB-29 Dye using nanocomposites with polymers and study the enhanced degradation rate. Few studies have been carried out on polymer nanocomposites and their application in the degradation of AB-29 dyes and remediation of water purposes. Nanoparticle CdS is a very effective photocatalyst, commonly used for water purification along with nanoparticle ZnS and TiO2; but cadmium ion-leaching makes it ineffective for practical and commercial use. In the present work, we have reduced the leaching of hazardous cadmium ions by trapping them in a polyaniline matrix, hence making it suitable for commercial use. We have embedded ZnS and TiO2 along with CdS in a polyaniline matrix and compared their photocatalytic activity, stability, and reusability, proving our nano-composites suitable for commercial purposes with enhanced activities and stabilities, which is a novelty. All synthesized nanocomposites are active within the near-ultraviolet to deep infrared (i.e., 340–850 nm). This gives us full efficiency of the photocatalysts in the sunlight and further proves the commercial utility of our nanocomposites.
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Kamali M, Sheibani S, Ataie A. Magnetic MgFe 2O 4-CaFe 2O 4 S-scheme photocatalyst prepared from recycling of electric arc furnace dust. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2021; 290:112609. [PMID: 33892239 DOI: 10.1016/j.jenvman.2021.112609] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/27/2021] [Revised: 04/09/2021] [Accepted: 04/10/2021] [Indexed: 06/12/2023]
Abstract
In this research, magnetic MgFe2O4-CaFe2O4 photocatalyst powder was prepared from recycling of electric arc furnace (EAF) dust as a secondary source through a two-step leaching process followed by co-precipitation method. To maximize the total Fe to Ca recovery ratio (F/C) and evaluate the effective parameters of sulfuric acid concentration and temperature, response surface methodology (RSM) as a design of experiment was used. The best temperature and acid concentration were obtained as 85 °C and 1 M, respectively for the second step of the leaching process. X-ray diffraction (XRD) results indicated that the synthesized nanocomposite sample contains MgFe2O4 and CaFe2O4 phases together with a small amount of Ca2Fe2O5. The saturation magnetization and optical band gap of the synthesized composite powder were 24 emu/g and 2.17 eV, respectively. X-Ray photoelectron spectroscopy (XPS) result revealed the oxidation states as Fe3+, Ca2+, Mg2+ and O2-. Energy dispersive X-ray spectroscopy (EDS) showed that the elements were uniformly distributed within the nanostructured particles. Field emission scanning electron microscope (FESEM) and transmission electron microscope (TEM) results indicated the presence of CaFe2O4 and MgFe2O4 nanoparticles with good contact between them. The nanocomposite sample showed the capability of 45% for degrading methylene blue (MB) dye under 240 min visible light irradiation. The reusability tests showed that the photocatalytic activity of the nanocomposite was not considerably changed after three cycles.
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Affiliation(s)
- M Kamali
- School of Metallurgy and Materials Engineering, College of Engineering, University of Tehran, Tehran, Iran
| | - S Sheibani
- School of Metallurgy and Materials Engineering, College of Engineering, University of Tehran, Tehran, Iran.
| | - A Ataie
- School of Metallurgy and Materials Engineering, College of Engineering, University of Tehran, Tehran, Iran
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9
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The Application of Modified Natural Polymers in Toxicant Dye Compounds Wastewater: A Review. WATER 2020. [DOI: 10.3390/w12072032] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
The utilization of various types of natural and modified polymers for removing toxicant dyes in wastewater generated by the dye industry is reviewed in this article. Dye wastewater contains large amounts of metals, surfactants, and organic matter, which have adverse effects on human health, potentially causing skin diseases and respiratory problems. The removal of dyes from wastewaters through chemical and physical processes has been addressed by many researchers. Currently, the use of natural and modified polymers for the removal of dyes from wastewater is becoming more common. Although modified polymers are preferred for the removal of dyes, due to their biodegradability and non-toxic nature, large amounts of polymers are required, resulting in higher costs. Surface-modified polymers are more effective for the removal of dyes from the wastewater. A survey of 80 recently published papers demonstrates that modified polymers have outstanding dye removal capabilities, and thus have a high applicability in industrial wastewater treatment.
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Hasan I, Khan RA, Alharbi W, Alharbi KH, Abu Khanjer M, Alslame A. Synthesis, characterization and photo-catalytic activity of guar-gum-g-aliginate@silver bionanocomposite material. RSC Adv 2020; 10:7898-7911. [PMID: 35686226 PMCID: PMC9128726 DOI: 10.1039/d0ra00163e] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2020] [Accepted: 02/10/2020] [Indexed: 12/21/2022] Open
Abstract
The green mechanism for the synthesis of nanoparticles and their application to the wastewater treatment is of inordinate curiosity to the research community. Herein we outline a novel method for the synthesis of silver nanoparticles via a green route using alginate-guar gum blend (GG-Alg@Ag) and their application to degrade methylene blue (MB) dye. The synthesized material was characterized by FTIR, XRD, SEM-EDX, TEM, TGA-DTG, AFM, and UV-vis techniques. A combination of RSM and CCD was employed to compute the system and optimized values of various interacting parameters such as exposure time (120 min), pH (4.98), dye concentration (194 mg L−1), and catalyst dose (0.07 g) with a photodegradation capacity of 92.33% and desirability 1.0. The mechanism of degradation reaction was best elucidated by the pseudo-second-order model suggesting chemical deposition of MB on the GG-Alg@Ag surface through followed by the reduction mechanism in the occupancy of visible light. The optical studies indicated a value of 2.5 eV by Tauc's plot for bandgap energy (Eg) for GG-Alg@Ag bionanocomposite. The green mechanism for the synthesis of nanoparticles and their application to the wastewater treatment is of inordinate curiosity to the research community.![]()
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Affiliation(s)
- Imran Hasan
- Environmental Research Laboratory
- Department of Chemistry
- Chandigarh University
- Mohali
- India
| | - Rais Ahmad Khan
- Department of Chemistry
- College of Science
- King Saud University
- Riyadh-11451
- Kingdom of Saudi Arabia
| | - Walaa Alharbi
- Department of Chemistry
- Faculty of Science
- King Khalid University
- Abha
- Kingdom of Saudi Arabia
| | - Khadijah H. Alharbi
- Department of Chemistry
- Science and Arts College
- Rabigh Campus
- King Abdulaziz University
- Jeddah
| | - Maymonah Abu Khanjer
- Department of Chemistry
- College of Science
- King Saud University
- Riyadh-11451
- Kingdom of Saudi Arabia
| | - Ali Alslame
- Department of Chemistry
- College of Science
- King Saud University
- Riyadh-11451
- Kingdom of Saudi Arabia
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Ali AS, Nomura K, Homonnay Z, Kuzmann E, Scrimshire A, Bingham PA, Krehula S, Ristić M, Musić S, Kubuki S. The relationship between local structure and photo-Fenton catalytic ability of glasses and glass-ceramics prepared from Japanese slag. J Radioanal Nucl Chem 2019. [DOI: 10.1007/s10967-019-06726-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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12
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A selective and sensitive detection of residual hazardous textile dyes in wastewaters using voltammetric sensor. Microchem J 2019. [DOI: 10.1016/j.microc.2019.01.055] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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13
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Metallurgical Wastes Employed as Catalysts and Photocatalysts for Water Treatment: A Review. SUSTAINABILITY 2019. [DOI: 10.3390/su11092470] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Metallurgical slags are a mass-produced industrial solid waste, often destined to landfills; the volumes disposed represent an environmental burden. Over the last three decades, applications have been found for these wastes, mainly as a low-cost additive in building materials. More recently, their unique chemical properties have attracted attention to produce high-added-value materials for environmental applications, to be used as adsorbents, catalysts, or a source of reactive species in environmental engineering. Such uses can be classified as a function of the added value generated, technological complexity, and environmental impact. This review will focus specifically on the modification and use of slags for catalysis, photocatalysis, and photocatalytic production of hydrogen, which have received relatively little attention in literature. A summary will be presented about the general requirements for using unmodified slags as well as slag processed under alkaline or acidic conditions for advanced oxidation processes. Then, an overview will be given of the use of slags as photocatalysts in water treatment, organized according to the origin of the product (steel, copper, magnesium, ferromanganese), as well as emerging reports on the photocatalytic production of hydrogen, in contrast to the use of highly specific titania-based products developed for the same purpose.
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Surface Separation Equilibria and Dynamics of Cationic Dye Loaded onto Citric Acid and Sodium Hydroxide Treated Eggshells. INTERNATIONAL JOURNAL OF CHEMICAL REACTOR ENGINEERING 2019. [DOI: 10.1515/ijcre-2018-0029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
AbstractThis research enthusiastically highlights the bio-adsorption of methylene blue (MB) by local, poultry, NaOH and citric acid modified ubiquitous eggshell (LES, NLES, CLES, PES, NPES and CPES) adsorbents. The microstructures of these adsorbents indicated that they had some surface functional moieties that were responsible for the adsorption of MB. The Langmuir isotherm and PSO model best fit the experiment data. The largest Langmuir monolayer adsorption capacity${q_{max}}$, was 242.47 mg/g, with the largest MB initial concentration of 400 mg/L. This was a clear indication and a confirmation that MB adsorption by the powdered eggshells was chemisorptive. Moreover, the values of$F$, the thickness of the boundary layer/film were$\gt 0$, showing that the rate limiting step for the adsorption process was controlled by more than one diffusion mechanism. The values of$\Delta {G^\circ }$for the adsorption of MB by the adsorbents indicated that the adsorption reactions were all non-feasible and non-spontaneous. The values for$\Delta {S^\circ }$(J/K/mol) for LES, NLES and CPES for the uptake of MB showed decrease in the chaos or degree of randomness of the adsorption reactions, and the reverse was the case for PES, NPES and CLES for the uptake of MB, which showed increase in the chaos or degree of randomness of the adsorption. The adsorption of MB by LES, NLES and CPES gave$\Delta {H^\circ }$(kJ/mol) values which were indicative of endothermic nature of the adsorption systems, and the reverse was the case for the uptake of MB by PES, NPES and CLES, which was indicative of the exothermic nature of the adsorption systems.
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Laib S, Yazid HR, Guendouz N, Belmedani M, Sadaoui Z. Heterogeneous Fenton catalyst derived from hydroxide sludge as an efficient and reusable catalyst for anthraquinone dye degradation. SEP SCI TECHNOL 2018. [DOI: 10.1080/01496395.2018.1531892] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Salima Laib
- Laboratory of Reaction Engineering, Department of Environmental Engineering and Pharmaceutical Engineering, Faculty of Mechanical and Processes Engineering, University of Sciences and Technology Houari Boumediene, Algiers, Algeria
| | - Hynda Rezzaz Yazid
- Laboratory of Reaction Engineering, Department of Environmental Engineering and Pharmaceutical Engineering, Faculty of Mechanical and Processes Engineering, University of Sciences and Technology Houari Boumediene, Algiers, Algeria
| | - Nardjes Guendouz
- Laboratory of Reaction Engineering, Department of Environmental Engineering and Pharmaceutical Engineering, Faculty of Mechanical and Processes Engineering, University of Sciences and Technology Houari Boumediene, Algiers, Algeria
| | - Mohamed Belmedani
- Laboratory of transfer phenomenon, Department of Chemical Engineering and Cryogenics, Faculty of Mechanical and Processes Engineering, University of Sciences and Technology Houari Boumediene, Algiers, Algeria
| | - Zahra Sadaoui
- Laboratory of Reaction Engineering, Department of Environmental Engineering and Pharmaceutical Engineering, Faculty of Mechanical and Processes Engineering, University of Sciences and Technology Houari Boumediene, Algiers, Algeria
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Heidari B, Soleimani M, Mirghaffari N. The use of steel slags in the heterogeneous Fenton process for decreasing the chemical oxygen demand of oil refinery wastewater. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2018; 78:1159-1167. [PMID: 30339540 DOI: 10.2166/wst.2018.347] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The Fenton process is a useful and inexpensive type of advanced oxidation process for industrial wastewater treatment. This study was performed with the aim of using the steel slag as a catalyst in the heterogeneous Fenton process in order to reduce the chemical oxygen demand (COD) of oil refinery wastewater. The effects of various parameters including the reaction time (0.5, 1.0, 2.0, 3.0 and 4.0 h), pH (2.0, 3.0, 4.0, 5.0, 6.0 and 7.0), the concentration of steel slag (12.5, 25.0 and 37.5 g/L), and H2O2 concentration (100, 250, 400 and 500 mg/L) on the Fenton process were investigated. Furthermore, the effect of microwave irradiation on the process efficiency was studied by considering the optimum conditions of the mentioned parameters. The results showed that using 25.0 g/L of steel slag and 250 mg/L H2O2, at pH = 3.0, could reduce COD by up to 64% after 2.0 h. Also, microwave irradiation decreased the time of the process from 120 min to 25 min in the optimum conditions, but it consumed a high amount of energy. It could be concluded that steel slags had a high potential in the treatment of oil refinery wastewater through the Fenton process.
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Affiliation(s)
- Behnam Heidari
- Department of Natural Resources, Isfahan University of Technology, Isfahan, 841568311, Iran E-mail:
| | - Mohsen Soleimani
- Department of Natural Resources, Isfahan University of Technology, Isfahan, 841568311, Iran E-mail:
| | - Nourollah Mirghaffari
- Department of Natural Resources, Isfahan University of Technology, Isfahan, 841568311, Iran E-mail:
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Senobari S, Nezamzadeh-Ejhieh A. A comprehensive study on the photocatalytic activity of coupled copper oxide-cadmium sulfide nanoparticles. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2018; 196:334-343. [PMID: 29475182 DOI: 10.1016/j.saa.2018.02.043] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/13/2017] [Revised: 02/05/2018] [Accepted: 02/12/2018] [Indexed: 06/08/2023]
Abstract
Coupled CdS-CuO nanoparticles (NPs) subjected in the photocatalytic degradation of Methylene blue (MB) aqueous solution. The calcination temperature and the crystallite phase of CuO had a significant role on the photocatalytic activity of the coupled system and CuO200/2h-CdS catalyst (containing CuO calcined at 200°C for 2h) showed the best photocatalytic activity. The coupled system showed increased activity with respect to the monocomponent semiconductors. The prepared catalysts characterized by x-ray diffraction (XRD), scanning electron microscope equipped with energy dispersive X-ray (EDX) analyzer, x-ray mapping, Fourier transform infrared (FTIR) spectroscopy, diffuse reflectance spectroscopy (DRS) and electrochemical impedance spectroscopy (EIS) techniques. The best degradation extent of MB was obtained at: CMB: 1mgL-1, pH5, 80min irradiation time and 0.8gL-1 of the CuO200/2h-CdS catalyst. The chemical oxygen demand (COD) confirmed about 83% of MB molecules can be mineralized at the optimum conditions.
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Affiliation(s)
- Samaneh Senobari
- Department of Chemistry, Shahreza Branch, Islamic Azad University, P.O. Box 311-86145, Shahreza, Isfahan, Islamic Republic of Iran; Young Researchers and Elite Club, Shahreza Branch, Islamic Azad University, Shahreza, Islamic Republic of Iran
| | - Alireza Nezamzadeh-Ejhieh
- Department of Chemistry, Shahreza Branch, Islamic Azad University, P.O. Box 311-86145, Shahreza, Isfahan, Islamic Republic of Iran; Young Researchers and Elite Club, Shahreza Branch, Islamic Azad University, Shahreza, Islamic Republic of Iran; Razi Chemistry Research Center (RCRC), Shahreza Branch, Islamic Azad University, Isfahan, Islamic Republic of Iran.
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