Simultaneous adsorption of As(Ⅲ) and Pb(Ⅱ) by the iron-sulfur codoped biochar composite:Competitive and synergistic effects

作     者：Yijun Chen Qintie Lin Xiaoqing Wen Jin He Haoyu Luo Quanfa Zhong Libin Wu Jiaqi Li 

作者机构：Guangdong Industrial Contaminated Site Remediation Technology and EquipmentEngineering Research CenterSchool of Environmental Science and EngineeringGuangdong University of TechnologyGuangzhou 510006China Key Lab of Pollution Control and Ecosystem Restoration in Industry ClustersMinistry of EducationSchool of Environment and EnergySouth China University of TechnologyGuangzhou 510006China Key Laboratory for City Cluster Environmental Safety and Green Development of the Ministry of EducationInstitute of Environmental and Ecological EngineeringGuangdong University of TechnologyGuangzhou 510006China 

出 版 物：《Journal of Environmental Sciences》 (环境科学学报（英文版）)

年 卷 期：2023年第125卷第3期

页      面：14-25页

核心收录：

学科分类：083002[工学-环境工程] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 081702[工学-化学工艺] 08[工学] 0817[工学-化学工程与技术] 

基　　金：supported by the National Key Research and Development Program of China (No. 2018YFC1802803) the National Natural Science Foundation of China (No. 21677041) the Science and Technology Project of Guangzhou City, China (No. 202103000018) 

主　　题：Iron-sulfur codoped Biochar Arsenic and lead Co-contamination remediation 

摘      要：Simultaneous elimination of As(Ⅲ) and Pb(Ⅱ) from wastewater is still a great *** this work,an iron-sulfur codoped biochar (Fe/S-BC) was successfully fabricated in a simplified way and was applied to the remediate the co-pollution of As(Ⅲ) and Pb(Ⅱ).The positive enthalpy indicated that the adsorption in As-Pb co-pollution was an endothermic *** mechanism of As(Ⅲ) removal could be illustrated by surface complexation,oxidation and *** addition to precipitation and complexation,the elimination mechanism of Pb(Ⅱ) also contained ion exchange and electrostatic *** and synergistic effects existed simultaneously in the co-contamination *** suppression of As(Ⅲ) was ascribed to competitive complexation of the two metals on Fe/S-BC,while the synergy of Pb(Ⅱ) was attributed to the formation of the PbFe2(AsO_(4))2(OH)*** experiments revealed that Fe/S-BC had outstanding ability to remove As(Ⅲ) and Pb(Ⅱ),regardless of pH dependency and interference by various coexisting *** maximum adsorption capacities of the Fe/S-BC for As(Ⅲ) and Pb(Ⅱ) were 91.2 mg/g and 631.7 mg/g,***/S-BC could be treated as a novel candidate for the elimination of As(Ⅲ)-Pb(Ⅱ) combined pollution.