羊粪生物炭对Pb、Zn、Cd和Cu吸附特性及机制  

Adsorption Characteristics and Mechanism of Pb,Zn,Cd and Cu by Sheep Manure Biochar

作　　者：张杏锋[1,2] 聂小奇 姚航[1,3] 张学洪 冯健飞[1,2] 高波 ZHANG Xingfeng;NIE Xiaoqi;YAO Hang;ZHANG Xuchong;FENG Jianfei;GAO Bo(Key Laboratory of Gungri Environmentul Pollution Conrol Theory and Technolugy,Guilin Universiy of Tee hnologo,Cuilin 541004,China;Collaborative Innoration Center for Water Pollution Control and waler Safetyr in Karstl Area,Guilin Universily of Technolopo,Guilin 541004,China;Tongling Univeniry,Tongling 244061,China)

机构地区：[1]桂林理工大学,广西环境污染控制理论与技术重点实验室,广西桂林541004 [2]桂林理工大学,岩溶地区水污染控制与用水安全保障协同创新中心,广西桂林541004 [3]铜陵学院,安徽铜陵244061

出　　处：《水处理技术》2020年第5期24-29,共6页Technology of Water Treatment

基　　金：广西自然科学基金(2018GXNSFAA138045);广西科技重大专项(桂科AA17204047);“广西特聘专家”专项经费;桂林理工大学科研启动经费;广西矿冶与环境科学实验中心。

摘　　要：制备并探讨了羊粪源生物炭在溶液中对Pb、Zn、Cd和Cu的吸附特性及机制。结果表明,羊粪生物炭对溶液中4种重金属均能进行有效吸附,在吸附过程发生了化学反应,存在离子交换现象。吸附数据能在Langmuir模型与准2级动力学模型中进行相对合适的拟合。在吸附过程中,各重金属离子之间存在竞争关系,当初始pH为1时,Zn在吸附竞争中具有相对优势;当初始pH为3时,Pb、Cd在吸附竞争中具有相对优势;当初始pH为5、7时,Pb、Cu在吸附竞争中占据优势。羊粪生物炭在适宜条件下对复合溶液中的4种重金属的吸附能力均处于较高水平,具备实际应用价值。The sheep manure biochar was prepared and its adsorption characteristics and mechanism for Pb,Zn,Cd and Cu in solution was discussed.The results showed that,the four heavy metals in the solution could be effectively adsorbed by sheep manure biochar,and chemical reactions occurred during the adsorption process,and ion exchange existed.The adsorption data could be fitted properly in Langmuir model and pseudo-second-order kinetic model.In the process of adsorption,there was competition between heavy metal ions.Zn had relative advantages in adsorption competition when the initial pH was 1.Pb and Cd had relative advantages in adsorption competition when the initial pH was 3.Pb and Cu had an advantage in the adsorption competition when the initial pH was 5.The adsorption capacity of sheep manure biochar to the four heavy metals in the compound solution was at a high level when under suitable conditions,which has practical application value.

关 键 词：羊粪生物炭 PB ZN CD CU 复合重金属溶液 

分 类 号：TQ424[化学工程]