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Fang Y, Yang L, Rao F, Zhang K, Qin Z, Song Z, Na Z. Behaviors and Mechanisms of Adsorption of MB and Cr(VI) by Geopolymer Microspheres under Single and Binary Systems. Molecules 2024; 29:1560. [PMID: 38611839 PMCID: PMC11013745 DOI: 10.3390/molecules29071560] [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: 01/25/2024] [Revised: 03/09/2024] [Accepted: 03/13/2024] [Indexed: 04/14/2024] Open
Abstract
Geopolymers show great potential in complex wastewater treatment to improve water quality. In this work, general geopolymers, porous geopolymers and geopolymer microspheres were prepared by the suspension curing method using three solid waste products, coal gangue, fly ash and blast furnace slag. The microstructure, morphology and surface functional groups of the geopolymers were studied by SEM, XRD, XRF, MIP, FTIR and XPS. It was found that the geopolymers possess good adsorption capacities for both organic and inorganic pollutants. With methylene blue and potassium dichromate as the representative pollutants, in order to obtain the best removal rate, the effects of the adsorbent type, dosage of adsorbent, concentration of methylene blue and potassium dichromate and pH on the adsorption process were studied in detail. The results showed that the adsorption efficiency of the geopolymers for methylene blue and potassium dichromate was in the order of general geopolymers < porous geopolymers < geopolymer microspheres, and the removal rates were up to 94.56% and 79.46%, respectively. Additionally, the competitive adsorption of methylene blue and potassium dichromate in a binary system was also studied. The mechanism study showed that the adsorption of methylene blue was mainly through pore diffusion, hydrogen bond formation and electrostatic adsorption, and the adsorption of potassium dichromate was mainly through pore diffusion and redox reaction. These findings demonstrate the potential of geopolymer microspheres in adsorbing organic and inorganic pollutants, and, through five cycles of experiments, it is demonstrated that MGP exhibits excellent recyclability.
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Affiliation(s)
- Yi Fang
- Zijin School of Geology and Mining, Fuzhou University, Fuzhou 350108, China; (Y.F.); (K.Z.); (Z.Q.)
- Fujian Key Laboratory of Green Extraction and High-Value Utilization of New Energy Metals, Fuzhou 350108, China
| | - Lang Yang
- Zijin School of Geology and Mining, Fuzhou University, Fuzhou 350108, China; (Y.F.); (K.Z.); (Z.Q.)
- Fujian Key Laboratory of Green Extraction and High-Value Utilization of New Energy Metals, Fuzhou 350108, China
- State Key Laboratory of Mineral Processing, Beijing 102628, China
| | - Feng Rao
- Zijin School of Geology and Mining, Fuzhou University, Fuzhou 350108, China; (Y.F.); (K.Z.); (Z.Q.)
- Fujian Key Laboratory of Green Extraction and High-Value Utilization of New Energy Metals, Fuzhou 350108, China
| | - Kaiming Zhang
- Zijin School of Geology and Mining, Fuzhou University, Fuzhou 350108, China; (Y.F.); (K.Z.); (Z.Q.)
- Fujian Key Laboratory of Green Extraction and High-Value Utilization of New Energy Metals, Fuzhou 350108, China
| | - Zhuolin Qin
- Zijin School of Geology and Mining, Fuzhou University, Fuzhou 350108, China; (Y.F.); (K.Z.); (Z.Q.)
- Fujian Key Laboratory of Green Extraction and High-Value Utilization of New Energy Metals, Fuzhou 350108, China
| | - Zhenguo Song
- State Key Laboratory of Mineral Processing, Beijing 102628, China
| | - Zhihui Na
- Yunnan Phosphate Haikou Co., Ltd., Kunming 650114, China
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Saad EM, Abd-Elhafiz MF, Ahmed EM, Markeb AA. Hexavalent chromium ion removal from wastewater using novel nanocomposite based on the impregnation of zero-valent iron nanoparticles into polyurethane foam. Sci Rep 2024; 14:5387. [PMID: 38443423 PMCID: PMC10914806 DOI: 10.1038/s41598-024-55803-1] [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: 01/12/2024] [Accepted: 02/27/2024] [Indexed: 03/07/2024] Open
Abstract
In this study, we developed a novel nanocomposite, polyurethane foam impregnated with zero-valent iron nanoparticles (PU@nZVI), for the effective removal of chromium(VI) from various water sources. The characterization of nanocomposite (PU@nZVI) was performed by XRD, SEM-EDS, TEM and FT-IR techniques. Using the response surface methodology, we optimized the removal conditions, achieving an optimal pH of 2 and a dose of 0.5 g/L. The PU@nZVI demonstrated an excellent maximum adsorption capacity of 600.0 mg/g for Cr6+. The adsorption kinetics and isotherms were best described by the pseudo-second-order model and the Freundlich isotherm, respectively. Significantly, the nanocomposite removed 99.98% of Cr6+ from tap water, 96.81% from industrial effluent, and 94.57% from treated sewage wastewater. Furthermore, the PU@nZVI maintained its efficiency over five adsorption-desorption cycles, highlighting its reusability. These results suggest that the PU@nZVI nanocomposite is a highly efficient and sustainable option for chromium(VI) removal in water treatment applications.
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Affiliation(s)
- Eman M Saad
- Chemistry Department, Faculty of Science, Suez University, Suez, Egypt.
| | | | - Eman M Ahmed
- Chemistry Department, Faculty of Engineering, South Vally University, South Vally, Qena, Egypt
| | - Ahmad Abo Markeb
- Department, Faculty of Science, Assiut University, Assiut, Egypt
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3
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Devi B, Goswami M, Devi A. Entrapment behaviours of trivalent and hexavalent chromium from aqueous medium using edible alkali-derived activated carbon of Eichhornia crassipes (water hyacinth). ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024; 31:6025-6039. [PMID: 38135795 DOI: 10.1007/s11356-023-31545-x] [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: 09/29/2023] [Accepted: 12/10/2023] [Indexed: 12/24/2023]
Abstract
The study examines the adsorption capabilities of an environmentally friendly activated carbon derived from a novel activating agent, i.e., an edible alkali prepared from black gram plant ash, for the removal of Cr(III) and Cr(VI) ions from an aqueous environment. The results of the systematic research show impressive removal efficiencies of 95.12% for Cr(III) ions and 99.6% for Cr(VI) ions. The kinetics and equilibrium data of the adsorption process confirm to the pseudo-second-order kinetics and Freundlich isotherm model. The thermodynamic analysis reveals the adsorption process as feasible and spontaneous across the temperature range of 298-313 K. The mechanism entails electrostatic attraction and adsorption of Cr(III) and Cr(VI) ions on oppositely charged surfaces and the participation of oxygen-containing functional groups on WHAC-BGA surface in the reduction of Cr(VI) to Cr(III). This study provides valuable insights for optimizing strategies to combat chromium contamination in water sources, offering a sustainable solution with the potential for real-world application.
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Affiliation(s)
- Bhaswati Devi
- Environmental Chemistry Laboratory, Resource Management and Environment Section, Life Science Division, Institute of Advanced Study in Science and Technology, Guwahati, 781035, Assam, India
- Department of Chemistry, Gauhati University, Guwahati, 781014, Assam, India
| | - Manisha Goswami
- Environmental Chemistry Laboratory, Resource Management and Environment Section, Life Science Division, Institute of Advanced Study in Science and Technology, Guwahati, 781035, Assam, India
- Department of Environmental Science, Gauhati University, Guwahati, 781014, Assam, India
| | - Arundhuti Devi
- Environmental Chemistry Laboratory, Resource Management and Environment Section, Life Science Division, Institute of Advanced Study in Science and Technology, Guwahati, 781035, Assam, India.
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Durden L, Eckhoff K, Burdsall AC, Youn S, Andújar-Gonzalez C, Abu-Niaaj L, Magnuson M, Harper WF. Characterizing Bacillus globigii as a Bacillus anthracis surrogate for wastewater treatment studies and bioaerosol emissions. ENVIRONMENTAL SCIENCE : WATER RESEARCH & TECHNOLOGY 2023; 9:3458-3466. [PMID: 38516331 PMCID: PMC10953809 DOI: 10.1039/d3ew00524k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/23/2024]
Abstract
This study characterized Bacillus globigii (BG) as a Bacillus anthracis Sterne (BAS) surrogate for wastewater treatment-related studies of UV inactivation, adsorption onto powdered activated carbon (PAC), and bioaerosol emission. The inactivation of BG was faster than that of BAS in DI water (pseudo first-order rate constants of 0.065 and 0.016 min-1 respectively) and in PBS solution (0.030 and 0.005 min-1 respectively). BG was also removed more quickly than BAS by PAC adsorption in DI (0.07 and 0.05 min-1 respectively) and in PBS (0.09 and 0.04 min-1 respectively). In DI, BG aggregated more (P < 0.05) than BAS when the pH was 7 or greater but there were no statistically significant differences in NaCl solution. Spore aggregation was also studied with extended Derjaguin-Landau-Verwey-Overbeek (XDLVO) models. Less than 1% of all spores were released as bioaerosols, and there was no significant difference (P > 0.05) in emission between BG and BAS. To the author's knowledge, this study is the first to demonstrate that BG is a suitable surrogate for BAS for bioaerosol emissions, but a poor surrogate for both UV inactivation and PAC adsorption. These results can be used to understand the ability of BAS to act as a surrogate for BA Ames because of its genetic and morphological similarities with BAS.
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Affiliation(s)
- Leigh Durden
- Department of Systems Engineering and Management, Engineering Management Program, Air Force Institute of Technology, 2950 Hobson Way, Wright-Patterson AFB, OH, USA
| | - Kyle Eckhoff
- Department of Systems Engineering and Management, Engineering Management Program, Air Force Institute of Technology, 2950 Hobson Way, Wright-Patterson AFB, OH, USA
| | - Adam C Burdsall
- Water Infrastructure Protection Division, National Homeland Security Research Center, US Environmental Protection Agency, Cincinnati, Ohio, USA
| | - Sungmin Youn
- Department of Civil Engineering, Marshall University, Huntington, West Virginia, USA
| | - Cindy Andújar-Gonzalez
- Department of Systems Engineering and Management, Engineering Management Program, Air Force Institute of Technology, 2950 Hobson Way, Wright-Patterson AFB, OH, USA
| | - Lubna Abu-Niaaj
- Department of Agricultural and Life Sciences, Central State University, Wilberforce, Ohio, USA
| | - Matthew Magnuson
- Water Infrastructure Protection Division, National Homeland Security Research Center, US Environmental Protection Agency, Cincinnati, Ohio, USA
| | - Willie F Harper
- Department of Systems Engineering and Management, Engineering Management Program, Air Force Institute of Technology, 2950 Hobson Way, Wright-Patterson AFB, OH, USA
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Li N, Lu W, Zhu D. Amino-Functionalized Silica@Resorcinol-Formaldehyde Nanocomposites for the Removal of Cr(VI) from Aqueous Solutions. Polymers (Basel) 2023; 15:4094. [PMID: 37896338 PMCID: PMC10610197 DOI: 10.3390/polym15204094] [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: 08/21/2023] [Revised: 09/29/2023] [Accepted: 09/30/2023] [Indexed: 10/29/2023] Open
Abstract
Amino-functionalized silica@resorcinol-formaldehyde nanocomposites (NH2-SiO2@RF) were synthesized for the removal of Cr(VI) from aqueous solutions using the sol-gel technique with two simple preparation steps, including the one-pot synthesis of SiO2@RF using the Stöber method and (3-aminopropyl)triethoxysilane (APTES) modification. The morphology, particle size, functional group, and thermal stability of the obtained nanocomposites were systematically characterized, with the results indicating a uniform sphericity with a particle size of 200 nm and high thermal stability. The adsorption results demonstrated that the preferred pH value was 2, and the data were well fitted with the Langmuir and Temkin isotherm models and quasi-second-order kinetic equation, indicating a high adsorption capacity. The maximum Cr(VI) adsorption capacity from the nonlinear form of the Langmuir model was 272.6 mg·g-1. The intra-particle diffusion model accurately described the adsorption of Cr(VI) onto NH2-SiO2@RF. The changes in Gibb's free energy, enthalpy, and entropy revealed that Cr(VI) adsorption onto NH2-SiO2@RF was a spontaneous and endothermic process. Furthermore, high selectivity was demonstrated in the material for the removal of Cr(VI) from commonly coexisting ions. The obtained nanocomposites had good regeneration properties and maintained a removal rate above 85% in the fifth adsorption-desorption experiments. Moreover, under the optimized adsorption conditions, the obtained nanocomposites were preliminarily applied to tannery wastewater, demonstrating an excellent removal effect, which indicates their potential application value.
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Affiliation(s)
- Nan Li
- Faculty of Light Industry, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, China;
- Key Laboratory for Green Technology of Leather Manufacture, China National Light Industry Council, Jinan 250353, China
| | - Wenhui Lu
- Faculty of Light Industry, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, China;
- Key Laboratory for Green Technology of Leather Manufacture, China National Light Industry Council, Jinan 250353, China
| | - Deyi Zhu
- Faculty of Light Industry, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, China;
- Key Laboratory for Green Technology of Leather Manufacture, China National Light Industry Council, Jinan 250353, China
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Razafintsalama AR, Mishra RP, Sahoo MK, Mrinalini M, Sahoo B, Ravelonandro P, Chaudhary YS. Efficient Photocatalytic Reduction of Hexavalent Chromium by BiVO 4-Decorated MXene Photocatalysts and Their Charge Carrier Dynamics. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023; 39:12725-12739. [PMID: 37655778 DOI: 10.1021/acs.langmuir.3c01462] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/02/2023]
Abstract
The synergistically MXene (Ti3C2Tx) co-catalyst-decorated BiVO4-based heterostructured photocatalysts have been synthesized by a hydrothermal approach with varied loading concentrations of MXene (Ti3C2Tx) to drive the hexavalent chromium reduction efficiently. The formation of the heterostructured photocatalyst was confirmed by the appearance of X-ray diffraction (XRD) peaks corresponding to the monoclinic BiVO4 phase and MXene (Ti3C2Tx) and also the antisymmetric (834 cm-1) and symmetric stretching (715 cm-1) of tetrahedral VO4 and D (1330 cm-1) and G (1570 cm-1) bands corresponding to MXene (Ti3C2Tx) in the Raman spectrum. The worm-like structures of BiVO4 nanocrystals grew onto the lamellar sheets of MXene (Ti3C2Tx), as shown by field emission scanning electron microscopy (FESEM), and has an increased surface area of 15.62 m2g-1 in the case of BVO-20-TC. X-ray photoelectron spectroscopy (XPS) analysis confirms the presence of V5+ and Ti3+states, and the uniform distribution of BiVO4 nanocrystals over lamellar sheets of MXene (Ti3C2Tx) is evident from energy-dispersive X-ray (EDX) analysis. The ultraviolet-diffuse reflectance spectroscopy (UV-DRS) spectra suggest a decrease in the band gap energy of BVO-20-TC to 2.335 eV, promoting a higher degree of visible light harvesting. Upon optimization, by varying the pH, the amount of the photocatalyst, and the concentration of Cr(IV), BVO-20-TC exhibits the highest photocatalytic efficiency (96.39%) while using a Cr(VI) concentration of 10 ppm at pH 2 and 15 mg of the photocatalyst, and the photoreduction of Cr(VI) to Cr(III) follows the pseudo-first-order reaction. The decrease in the PL intensity in BVO-20-TC reveals a faster transfer of electrons from MXene (Ti3C2Tx) to BiVO4. Further, the higher degree of band bending at the BiVO4/MXene (Ti3C2Tx) heterojunction, revealed from the Mott-Schottky analysis, facilitates efficient charge transfer and eventually faster and efficient photoreduction of Cr(VI) to Cr(III). The reusability and stability test undertaken for BVO-20-TC reveals that even after five cycles, the Cr (VI) photoreduction efficacy is retained. This work provides insights into photoreduction of Cr (VI) by using such heterostructures.
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Affiliation(s)
- A Rija Razafintsalama
- Materials Chemistry Department, CSIR-Institute of Minerals Technology, Bhubaneswar, Odisha 751013, India
- Procédés et Ecologie Industrielle, Unité de Recherche en Génie des Procédés et Génie de l'Environnement, University of Antananarivo, Antananarivo 101, Madagascar
| | - Rajashree P Mishra
- Materials Chemistry Department, CSIR-Institute of Minerals Technology, Bhubaneswar, Odisha 751013, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Manas K Sahoo
- Materials Chemistry Department, CSIR-Institute of Minerals Technology, Bhubaneswar, Odisha 751013, India
| | - Madoori Mrinalini
- Materials Chemistry Department, CSIR-Institute of Minerals Technology, Bhubaneswar, Odisha 751013, India
| | - Bismaya Sahoo
- Materials Chemistry Department, CSIR-Institute of Minerals Technology, Bhubaneswar, Odisha 751013, India
| | - Pierre Ravelonandro
- Procédés et Ecologie Industrielle, Unité de Recherche en Génie des Procédés et Génie de l'Environnement, University of Antananarivo, Antananarivo 101, Madagascar
| | - Yatendra S Chaudhary
- Materials Chemistry Department, CSIR-Institute of Minerals Technology, Bhubaneswar, Odisha 751013, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
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Grozdov D, Zinicovscaia I. Mesoporous Materials for Metal-Laden Wastewater Treatment. MATERIALS (BASEL, SWITZERLAND) 2023; 16:5864. [PMID: 37687556 PMCID: PMC10488830 DOI: 10.3390/ma16175864] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/23/2023] [Revised: 08/17/2023] [Accepted: 08/23/2023] [Indexed: 09/10/2023]
Abstract
Rapid technological, industrial and agricultural development has resulted in the release of large volumes of pollutants, including metal ions, into the environment. Heavy metals have become of great concern due to their toxicity, persistence, and adverse effects caused to the environment and population. In this regard, municipal and industrial effluents should be thoroughly treated before being discharged into natural water or used for irrigation. The physical, chemical, and biological techniques applied for wastewater treatment adsorption have a special place in enabling effective pollutant removal. Currently, plenty of adsorbents of different origins are applied for the treatment of metal-containing aqueous solution and wastewater. The present review is focused on mesoporous materials. In particular, the recent achievements in mesoporous materials' synthesis and application in wastewater treatment are discussed. The mechanisms of metal adsorption onto mesoporous materials are highlighted and examples of their multiple uses for metal removal are presented. The information contained in the review can be used by researchers and environmental engineers involved in the development of new adsorbents and the improvement of wastewater treatment technologies.
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Affiliation(s)
- Dmitrii Grozdov
- Department of Nuclear Physics, Joint Institute for Nuclear Research, Joliot-Curie Str., 6, 1419890 Dubna, Russia;
| | - Inga Zinicovscaia
- Department of Nuclear Physics, Joint Institute for Nuclear Research, Joliot-Curie Str., 6, 1419890 Dubna, Russia;
- Department of Nuclear Physics, Horia Hulubei National Institute for R&D in Physics and Nuclear Engineering, 30 Reactorului Str. MG-6, 077125 Magurele, Romania
- Institute of Chemistry, Moldova State University, 3, Academiei Str, MD-2028 Chisinau, Moldova
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