标题: (Application of Dithiocarbamate Chitosan Modified SBA-15 for Catalytic Reductive Removal of Vanadium(V) )

作者: Huang, YL (Huang, Yilin); Wang, J (Wang, Jia); Li, MW (Li, Mengwei); You, ZX (You, Zhixiong)

来源出版物: CATALYSTS卷: 12期: 11文献号: 1469 DOI: 10.3390/catal12111469出版年: NOV 2022

摘要: We have successfully synthesized dithiocarbamate chitosan modified SBA-15 (CS2C@SBA) composites, with promise in vanadium (V(V)) elimination. Among the three composites using different mass ratios of dithiocarbamate chitosan to SBA-15, CS2C@SBA-3, which had the highest CS2 substitution, showed the best performance on V(V) removal of which the maximum adsorption capacity could achieve 218.00 mg/g at pH 3.0. The adsorption kinetics were best fitted with a pseudo-second order reaction model, suggesting a chemisorption mechanism. Meanwhile, the Langmuir model fitted better with the adsorption isotherm, revealing a monolayer adsorption behavior. Through FTIR and XPS analysis, the functional group -SH was identified as dominating reduction sites on this composite, which reduced 73.1% of V(V) into V(IV) and V(III). The functional group -NH- was the main adsorption site for vanadium species. This reaction followed a catalytic reduction coupled adsorption mechanism reducing most of V(V) into less toxic vanadium species. Furthermore, CS2C@SBA-3 showed great selectivity towards V(V) in the presence of various co-existing ions in synthetic wastewater and real water samples. Moreover, CS2C@SBA-3 could retain a removal efficiency over 90% after five adsorption-desorption cycles. Based on the aforementioned results, we can conclude that CS2C@SBA-3 has great potential to be applied in efficient remediation of vanadium water-pollution.

作者关键词: vanadium elimination; adsorption; catalytic reduction; thiol function group; dithiocarbamate chitosan modified SBA-15

地址: [Huang, Yilin; Li, Mengwei; You, Zhixiong] Wuhan Univ, Sch Resource & Environm Sci, Wuhan 430072, Peoples R China.

[Wang, Jia] Huazhong Univ Sci & Technol, Sch Environm Sci & Engn, Wuhan 430074, Peoples R China.

[Wang, Jia] Huazhong Univ Sci & Technol, Sch Chem & Chem Engn, Key Lab Mat Chem & Serv Failure, Wuhan 430074, Peoples R China.

通讯作者地址: You, ZX (通讯作者)，Wuhan Univ, Sch Resource & Environm Sci, Wuhan 430072, Peoples R China.

Wang, J (通讯作者)，Huazhong Univ Sci & Technol, Sch Environm Sci & Engn, Wuhan 430074, Peoples R China.

Wang, J (通讯作者)，Huazhong Univ Sci & Technol, Sch Chem & Chem Engn, Key Lab Mat Chem & Serv Failure, Wuhan 430074, Peoples R China.

电子邮件地址: jiawang@hust.edu.cn;zyou@whu.edu.cn

影响因子：4.501