Removal of Cd and Pb with biochar made from dairy manure at low temperature

作     者：CHEN Zhi-liang ZHANG Jian-qiang HUANG Ling YUAN Zhi-hui LI Zhao-jun LIU Min-chao 

作者机构：Guangdong Engineering Technology Research Center of Heavy Metal Pollution Control and Restoration in Farmland SoilSouth China Institute of Environmental Sciences School of Environment and ChemistryWuyi UniversityJiangmen Key Laboratory of Plant Nutrition and FertilizerMinistry of Agriculture/China-New Zealand Joint Laboratory for Soil Molecular EcologyInstitute of Agricultural Resources and Regional PlanningChinese Academy of Agricultural Sciences 

出 版 物：《Journal of Integrative Agriculture》 (农业科学学报（英文版）)

年 卷 期：2019年第18卷第1期

页      面：201-210页

核心收录：

学科分类：09[农学] 

基　　金：the National Key R&D Program of China (2017YFD0801300) the Guangdong Technology Program of China (2017B020203001) the Guangdong Natural Science Foundation of China (2017A030313245) the Guangzhou Technology Program of China (201607010393,2016201604030017 and 201707010484) for financial support 

主　　题：biochar kinetics isotherms Pb Cd 

摘      要：Biochar(BC) derived from waste products is a cost-effective sorbent for remediation of metal-contaminated *** studied the kinetics and adsorption mechanisms for removal of metal ions,such as lead(Pb^(2+)) and cadmium(Cd^(2+)) with *** adsorption capacities of BC for Pb^(2+) and Cd^(2+) increased after alkaline *** highest sorption capacities were 175.53 and 68.08 mg g^(–1),for Pb and Cd,*** Langmuir adsorption isotherm and pseudo second kinetic equation could well fit the adsorption processes,revealing that the sorption mechanisms of Pb^(2+) and Cd^(2+) by BC are complex and predominantly controlled by *** has a higher affinity for Pb than Cd,due to easy hydrolysis of Pb at low ***,precipitation as carbonate minerals(2PbCO_3·Pb(OH)_2 and CdCO_3) and complexation with functional groups(carboxyl and hydroxyl) were also important for adsorption of Pb and Cd by BC.