生态环境学报2023，Vol.32Issue(10)：1842-1853,12.DOI:10.16258/j.cnki.1674-5906.2023.10.013
壳聚糖-生物铁锰氧化物去除水体中锑的性能及机理研究
Enhanced Removal of Sb(Ⅲ)and Sb(Ⅴ)Using Biological Iron and Manganese Oxides Modified Chitosan:Performance and Mechanism Study
摘要
Abstract
Antimony(Sb)is a naturally occurring metalloid that poses inevitable threats and hazards to ecological systems and human health due to its potential toxicity and carcinogenicity.In this study,a novel adsorbent was successfully synthesized by biological iron and manganese oxides modified chitosan(CH-BFMO).Batch experiments were conducted to explore the removal performance of Sb(Ⅲ)and Sb(Ⅴ),and the removal mechanism was then investigated through adsorption kinetics and isotherm,coupled with FTIR and XPS analysis.The results showed that the morphology and structure of BFMO were not changed after modification.But its surface area was increased from 79.2 m2∙g-1 to 91.3 m2∙g-1,making it more favorable for Sb adsorption.The batch results showed that the amount of maximum adsorption capacity of Sb(Ⅲ)and Sb(Ⅴ)was 37.6 mg∙L-1(pH 4)and 24.8 mg∙L-1(pH 6),respectively.The adsorption processes followed pseudo-second-order kinetics,indicating chemical adsorption as the dominate removal mechanism.Moreover,the adsorption isotherm curve of Sb(Ⅲ)and Sb(Ⅴ)both conformed to the Langmuir isotherm model,suggesting that the process was monolayer adsorption.Furthermore,the characterization results of FTIR and XPS revealed the presence of reactive oxygen functional groups on the surface(C=O,C=C and O-H),which improved the removal efficiencies of Sb(Ⅲ)and Sb(Ⅴ).Overall,the removal of Sb(Ⅴ)mainly depended on chemical adsorption,while Sb(Ⅲ)was eliminated through oxidization and chemical adsorption.Finally,SO42-and CO32-had little effect on the removal of Sb(Ⅲ)and Sb(Ⅴ),while PO43-exhibited a significant inhibition effect on Sb(Ⅲ)and Sb(Ⅴ)adsorption.The adsorption efficiency of the CH-BFMO only decreased to 92.0%of the initial capacity after five adsorption-regeneration cycles.These results indicate that the CH-BFMO can be a promising adsorbent for the removal of antimony from wastewater.关键词
壳聚糖/生物质吸附剂/三价锑/五价锑/吸附去除/机理研究Key words
chitosan/biogenic adsorbent/Sb(Ⅲ)/Sb(Ⅴ)/Adsorption removal/mechanism study分类
资源环境引用本文复制引用
侯冬梅,张兰,李春成,陈露童,王盼盼,邹建平..壳聚糖-生物铁锰氧化物去除水体中锑的性能及机理研究[J].生态环境学报,2023,32(10):1842-1853,12.基金项目
国家自然科学基金青年基金项目(52200097) （52200097）
国家重点研发计划项目(2022YFD1700802) （2022YFD1700802）
江西省教育厅科技项目(DA202202121) （DA202202121）
