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Removal of Hazardous Contaminants from Water by Natural and Zwitterionic Surfactant-modified Clay

[Image: see text] In this study, natural clay (NC) was collected from Saudi Arabia and modified by cocamidopropyl betaine (CAPB) at different conditions (CAPB concentration, reaction time, and reaction temperature). NC and modified clay (CAPB-NC) were characterized using X-ray diffraction, thermogra...

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Autores principales: Abdel Ghafar, Hany H., Radwan, Emad K., El-Wakeel, Shaimaa T.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Chemical Society 2020
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7114751/
https://www.ncbi.nlm.nih.gov/pubmed/32258919
http://dx.doi.org/10.1021/acsomega.0c00166
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author Abdel Ghafar, Hany H.
Radwan, Emad K.
El-Wakeel, Shaimaa T.
author_facet Abdel Ghafar, Hany H.
Radwan, Emad K.
El-Wakeel, Shaimaa T.
author_sort Abdel Ghafar, Hany H.
collection PubMed
description [Image: see text] In this study, natural clay (NC) was collected from Saudi Arabia and modified by cocamidopropyl betaine (CAPB) at different conditions (CAPB concentration, reaction time, and reaction temperature). NC and modified clay (CAPB-NC) were characterized using X-ray diffraction, thermogravimetric analysis, Fourier transform infrared spectroscopy, field-emission scanning electron microscopy, and N(2) adsorption at 77 K. The adsorption efficiency of NC and CAPB-NC toward Pb(2+) and reactive yellow 160 dye (RY160) was evaluated. The adsorption process was optimized in terms of solution initial pH and adsorbent dosage. Finally, the adsorption kinetics and isotherms were studied. The results indicated that NC consists of agglomerated nonporous particles composed of quartz and kaolinite. CAPB modification reduced the specific surface area and introduced new functional groups by adsorbing on the NC surface. The concentration of CAPB affects the adsorption of RY160 tremendously; the optimum concentration was 2 times the cation exchange capacity of NC. The equilibrium adsorption capacity of CAPB-NC toward RY160 was about 6 times that of NC and was similar for Pb(2+). The adsorption process followed the pseudo-second-order kinetics for both adsorptive. RY160 adsorption on CAPB-NC occurs via multilayer formation while Pb(2+) adsorption on NC occurs via monolayer formation..
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spelling pubmed-71147512020-04-03 Removal of Hazardous Contaminants from Water by Natural and Zwitterionic Surfactant-modified Clay Abdel Ghafar, Hany H. Radwan, Emad K. El-Wakeel, Shaimaa T. ACS Omega [Image: see text] In this study, natural clay (NC) was collected from Saudi Arabia and modified by cocamidopropyl betaine (CAPB) at different conditions (CAPB concentration, reaction time, and reaction temperature). NC and modified clay (CAPB-NC) were characterized using X-ray diffraction, thermogravimetric analysis, Fourier transform infrared spectroscopy, field-emission scanning electron microscopy, and N(2) adsorption at 77 K. The adsorption efficiency of NC and CAPB-NC toward Pb(2+) and reactive yellow 160 dye (RY160) was evaluated. The adsorption process was optimized in terms of solution initial pH and adsorbent dosage. Finally, the adsorption kinetics and isotherms were studied. The results indicated that NC consists of agglomerated nonporous particles composed of quartz and kaolinite. CAPB modification reduced the specific surface area and introduced new functional groups by adsorbing on the NC surface. The concentration of CAPB affects the adsorption of RY160 tremendously; the optimum concentration was 2 times the cation exchange capacity of NC. The equilibrium adsorption capacity of CAPB-NC toward RY160 was about 6 times that of NC and was similar for Pb(2+). The adsorption process followed the pseudo-second-order kinetics for both adsorptive. RY160 adsorption on CAPB-NC occurs via multilayer formation while Pb(2+) adsorption on NC occurs via monolayer formation.. American Chemical Society 2020-03-20 /pmc/articles/PMC7114751/ /pubmed/32258919 http://dx.doi.org/10.1021/acsomega.0c00166 Text en Copyright © 2020 American Chemical Society This is an open access article published under an ACS AuthorChoice License (http://pubs.acs.org/page/policy/authorchoice_termsofuse.html) , which permits copying and redistribution of the article or any adaptations for non-commercial purposes.
spellingShingle Abdel Ghafar, Hany H.
Radwan, Emad K.
El-Wakeel, Shaimaa T.
Removal of Hazardous Contaminants from Water by Natural and Zwitterionic Surfactant-modified Clay
title Removal of Hazardous Contaminants from Water by Natural and Zwitterionic Surfactant-modified Clay
title_full Removal of Hazardous Contaminants from Water by Natural and Zwitterionic Surfactant-modified Clay
title_fullStr Removal of Hazardous Contaminants from Water by Natural and Zwitterionic Surfactant-modified Clay
title_full_unstemmed Removal of Hazardous Contaminants from Water by Natural and Zwitterionic Surfactant-modified Clay
title_short Removal of Hazardous Contaminants from Water by Natural and Zwitterionic Surfactant-modified Clay
title_sort removal of hazardous contaminants from water by natural and zwitterionic surfactant-modified clay
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7114751/
https://www.ncbi.nlm.nih.gov/pubmed/32258919
http://dx.doi.org/10.1021/acsomega.0c00166
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