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Superior photocatalytic aptitude of MWCNT/TiO2 for the removal of Cr (VI) from polluted water. RESEARCH ON CHEMICAL INTERMEDIATES 2023. [DOI: 10.1007/s11164-023-04983-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/02/2023]
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The effective adsorption of arsenic from polluted water using modified Halloysite nanoclay. ARAB J CHEM 2023. [DOI: 10.1016/j.arabjc.2023.104652] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/10/2023] Open
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Chen K, Li Y, Wang M, Du Q, Sun Y, Zhang Y, Chen B, Jing Z, Jin Y, Zhao S. Removal of Methylene Blue Dye from Aqueous Solutions by Pullulan Polysaccharide/Polyacrylamide/Activated Carbon Complex Hydrogel Adsorption. ACS OMEGA 2023; 8:857-867. [PMID: 36643493 PMCID: PMC9835784 DOI: 10.1021/acsomega.2c06205] [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: 09/27/2022] [Accepted: 12/08/2022] [Indexed: 06/17/2023]
Abstract
In this study, composite hydrogels were prepared using a simple synthetic technique to adsorb methylene blue (MB) from water. The hydrogel comprised potassium persulfate (KPS) as the initiator, N,N'-methylene bisacrylamide as the crosslinking agent, and sodium hydroxide (NaOH) as the activator. It was employed to adsorb MB at different concentrations from water. The morphology and properties of PUL/PAM/GO composites were characterized through thermogravimetric analysis, Fourier transform infrared spectroscopy, and scanning electron microscopy. Moreover, the adsorption properties, adsorption isotherms, adsorption kinetics, adsorption thermodynamics, and swelling properties of the hydrogel for MB were investigated. The optimal ratio of PUL to AC was obtained as 6:1 by fixing the amount of PUL and loading AC of different masses. The maximum adsorption capacity was obtained as 591.4 mg/g. It also exhibited certain mechanical strength. The adsorption of MB conforms to pseudo-first-order kinetics and Langmuir isotherms. In this study, an environment-friendly, cheap, simple, and efficient way was presented for the composite hydrogel in the direction of water treatment.
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Affiliation(s)
- Kewei Chen
- College
of Mechanical and Electrical Engineering, Qingdao University, 308 Ningxia Road, Qingdao266071, China
| | - Yanhui Li
- College
of Mechanical and Electrical Engineering, Qingdao University, 308 Ningxia Road, Qingdao266071, China
- Laboratory
of Fiber Materials and Modern Textile, The Growing Base for State
Key Laboratory, Qingdao University, 308 Ningxia Road, Qingdao266071, China
| | - Mingzhen Wang
- College
of Mechanical and Electrical Engineering, Qingdao University, 308 Ningxia Road, Qingdao266071, China
| | - Qiuju Du
- Laboratory
of Fiber Materials and Modern Textile, The Growing Base for State
Key Laboratory, Qingdao University, 308 Ningxia Road, Qingdao266071, China
| | - Yaohui Sun
- College
of Mechanical and Electrical Engineering, Qingdao University, 308 Ningxia Road, Qingdao266071, China
| | - Yang Zhang
- College
of Mechanical and Electrical Engineering, Qingdao University, 308 Ningxia Road, Qingdao266071, China
| | - Bing Chen
- College
of Mechanical and Electrical Engineering, Qingdao University, 308 Ningxia Road, Qingdao266071, China
| | - Zhenyu Jing
- College
of Mechanical and Electrical Engineering, Qingdao University, 308 Ningxia Road, Qingdao266071, China
| | - Yonghui Jin
- College
of Mechanical and Electrical Engineering, Qingdao University, 308 Ningxia Road, Qingdao266071, China
| | - Shiyong Zhao
- College
of Mechanical and Electrical Engineering, Qingdao University, 308 Ningxia Road, Qingdao266071, China
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Ahmadi S, Habibi D, Heydari S, Roshani Asl E. The capable xanthine-based adsorbent for removal of the Cd(II), Ni(II) and Pb(II) ions from aqueous solution via their complexation and the use of its corresponding Cd complex for the green synthesis of indazolophthalazinetriones. RESEARCH ON CHEMICAL INTERMEDIATES 2022. [DOI: 10.1007/s11164-022-04868-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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Sun Y, O'Connell DW. Application of visible light active photocatalysis for water contaminants: A review. WATER ENVIRONMENT RESEARCH : A RESEARCH PUBLICATION OF THE WATER ENVIRONMENT FEDERATION 2022; 94:e10781. [PMID: 36195318 PMCID: PMC9828070 DOI: 10.1002/wer.10781] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/16/2022] [Revised: 07/19/2022] [Accepted: 08/08/2022] [Indexed: 06/16/2023]
Abstract
Organic water pollutants are ubiquitous in the natural environment arising from domestic products as well as current and legacy industrial processes. Many of these organic water pollutants are recalcitrant and only partially degraded using conventional water and wastewater treatment processes. In recent decades, visible light active photocatalyst has gained attention as a non-conventional alternative for the removal of organic pollutants during water treatment, including industrial wastewater and drinking water treatment. This paper reviews the current state of research on the use of visible light active photocatalysts, their modified methods, efficacy, and pilot-scale applications for the degradation of organic pollutants in water supplies and waste streams. Initially, the general mechanism of the visible light active photocatalyst is evaluated, followed by an overview of the major synthesis techniques. Because few of these photocatalysts are commercialized, particular attention was given to summarizing the different types of visible light active photocatalysts developed to the pilot-scale stage for practical application and commercialization. The organic pollutant degradation ability of these visible light active photocatalysts was found to be considerable and in many cases comparable with existing and commercially available advanced oxidation processes. Finally, this review concludes with a summary of current achievements and challenges as well as possible directions for further research. PRACTITIONER POINTS: Visible light active photocatalysis is a promising advanced oxidation process (AOP) for the reduction of organic water pollutants. Various mechanisms of photocatalysis using visible light active materials are identified and discussed. Many recent photocatalysts are synthesized from renewable materials that are more sustainable for applications in the 21st century. Only a small number of pilot-scale applications exist and these are outlined in this review.
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Affiliation(s)
- Yifan Sun
- Department of Civil and Environmental EngineeringTrinity College DublinDublin 2Ireland
| | - David W. O'Connell
- Department of Civil and Environmental EngineeringTrinity College DublinDublin 2Ireland
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The Combined Effect of Bubble and Photo Catalysis Technology in BTEX Removal from Produced Water. BULLETIN OF CHEMICAL REACTION ENGINEERING & CATALYSIS 2022. [DOI: 10.9767/bcrec.17.3.15367.577-589] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Among the several ways used in wastewater treatment, the photocatalysis process is a more novel and alternative process that is increasingly employed in recent years. This work aims to improve the performance of the photocatalyst process by using air bubbles in removing the BTEX from produced water as an indicator of process efficiency. The study also shows the effect of influencing factors (pH and residence time) on the photocatalysis process. The study was done in a rectangular column with dimensions of 200 mm width, 30 mm depth, and 1500 mm height. Commercial titanium oxide (TiO2) coated on a plate by the varnish was used as a source of the photocatalyst. The experiment was carried out under different values of gas flow rate (0-3 L/min) to evaluate its effect on the photocatalyst process, the effect of other variables of pH (3-11), and irradiation time (30-120) min was also studied. A new method of the coating was adopted by using an alumina plate with varnish as an adhesive. The characteristics results show that the coated plate has hydrophilic properties and that there is no significant change in the crystal structure of the TiO2 nanoparticles and the varnish before and after 60 h of the photocatalytic process, indicating that the plate is still effective after 60 h usage under different conditions. The results also show that the introduction of air bubbles enhances the removal efficiency of BTEX significantly and the best removal effectiveness of BTEX was 93% when pH = 5 after 90 min and 90% when pH = 3 after 120 min. The removal rate also reached 86% when pH = 7 after 120 min all at a flow rate of 3 L/min. The percentage of removal decreased at pH = 9 and 11, reaching 64% and 50%, respectively after 120 min and a flow rate of 3 L/min. Copyright © 2022 by Authors, Published by BCREC Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0).
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Thongprasong O, Thananant H. Adsorption of iodine and reactive dye molecules from water using chemically modified and unmodified lignocellulosic powders (Ficus Lyrata seeds). RESEARCH ON CHEMICAL INTERMEDIATES 2022. [DOI: 10.1007/s11164-022-04824-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Ethanol mediated photoinduced reversible adsorption of methylene blue on nano titanium dioxide. RESEARCH ON CHEMICAL INTERMEDIATES 2022. [DOI: 10.1007/s11164-022-04759-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Hassankhani‐Majd Z, Anbia M. Comparative Study of Synthesis Parameters of Nanoporous Titania Particles to Improve Structural Properties and Photocatalytic Activity. ChemistrySelect 2021. [DOI: 10.1002/slct.202103550] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Zahra Hassankhani‐Majd
- Research Laboratory of Nanoporous Materials Faculty of Chemistry Iran University of Science and Technology Farjam Street, Narmak, P.O. Box 16846–13114 Tehran Iran
| | - Mansoor Anbia
- Research Laboratory of Nanoporous Materials Faculty of Chemistry Iran University of Science and Technology Farjam Street, Narmak, P.O. Box 16846–13114 Tehran Iran
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Preparation, characterization and application of Fe-pillared bentonite to the removal of Coomassie blue dye from aqueous solutions. RESEARCH ON CHEMICAL INTERMEDIATES 2020. [DOI: 10.1007/s11164-020-04236-2] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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