剩余污泥吸附Cu^(2+)、Cd^(2+)试验  

Experimental study on adsorption of Cu^(2+) and Cd^(2+) by residual sludge

作　　者：李雨霏[1,2] 王英伟[2] 马小凡[3] 孙文田[3] 

机构地区：[1]哈尔滨工业大学市政环境工程学院,哈尔滨150090 [2]东北林业大学林学院,哈尔滨150040 [3]吉林大学资源与环境学院,长春130026

出　　处：《哈尔滨工业大学学报》2010年第8期1282-1286,共5页Journal of Harbin Institute of Technology

摘　　要：为研究剩余污泥的有效利用,通过实验室静态吸附试验,研究剩余污泥对Cu2+、Cd2+溶液的吸附特性及影响因素.结果表明,吸附过程中pH值、污泥量、吸附时间和初始溶液质量浓度对吸附效率均有影响,pH值是吸附过程的最重要因素,增加投泥量和提高pH值可以明显提高吸附量,而温度对污泥吸附的影响并不显著.吸附热力学数据表明,污泥对Cu2+、Cd2+的吸附较好地符合Langmuir和Freundlich模型,最大吸附容量分别为32.4mg/g和30.2mg/g.剩余污泥能够作为重金属离子的吸附剂.For effective utilization of residual sludge,biosorption experiments of Cu^2＋ and Cd^2＋ were carried out using waste activated sludge from municipal sewage treatment plant as adsorption material,and the effects of pH value,temperature,reaction time,sludge quantity and initial solution concentration on the adsorption efficiency were studied through static state experiment.Results indicate that temperature has no significant effect on the adsorption,while pH value is the most important factor in the adsorption process and the increase of sludge quantity will enhance the adsorption capacity greatly.Besides,the adsorption process of Cu^2＋ and Cd^2＋ is in accordance with Langmuir isotherm and Freundlich model,and the maximum adsorption amounts at room temperature（20±2℃） are 32.4 mg/g and 30.2 mg/g respectively.It is indicated that the residual sludge can be used as an effective biosorbent for the removal of heavy metals.

关 键 词：剩余污泥 资源利用 重金属废水 吸附 CU2+ Cd2+ 

分 类 号：X7[环境科学与工程—环境工程]