Preparation of a sulfonated coal@ZVI@chitosan-acrylic acid composite and study of its removal of groundwater Cr(VI)

In this research, a new composite adsorbent (SC@ZVI@CS-AA) was designed and synthesized, and its application for the removal of Cr(VI) in groundwater was investigated. The interaction between SC@ZVI@CS-AA and Cr(VI) conformed to a pseudo-second-order model, and the adsorption process was dominated b...

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Veröffentlicht in:	Environmental science and pollution research international 2023, Vol.30 (3), p.6544-6558
Hauptverfasser:	Gao, Jianlei, Feng, Mengyuan, Yan, Yixin, Zhao, Zixu, Wang, Yingchun
Format:	Artikel
Sprache:	eng
Schlagworte:	Adsorption Aquatic Pollution Atmospheric Protection/Air Quality Control/Air Pollution Chitosan - chemistry Chromium - chemistry Earth and Environmental Science Ecotoxicology Environment Environmental Chemistry Environmental Health Groundwater - chemistry Iron - chemistry Research Article Waste Water Technology Water Management Water Pollutants, Chemical - analysis Water Pollution Control
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Zusammenfassung:	In this research, a new composite adsorbent (SC@ZVI@CS-AA) was designed and synthesized, and its application for the removal of Cr(VI) in groundwater was investigated. The interaction between SC@ZVI@CS-AA and Cr(VI) conformed to a pseudo-second-order model, and the adsorption process was dominated by chemisorption. The effects of material ratios, pH, temperature, SC@ZVI@CS-AA dosage, and coexisting ions on the removal of Cr(VI) were investigated. The removal efficiency of Cr(VI) by SC@ZVI@CS-AA reached 95%, and the reaction was significantly inhibited when SO 4 2− was present. Thermodynamically, the adsorption of Cr(VI) proceeded spontaneously above 35 °C ( ΔG θ
ISSN:	0944-1344 1614-7499
DOI:	10.1007/s11356-022-22413-1