净水厂干化铝污泥对水中Pb2+和Cu2+的吸附研究  

Adsorption of Pb2+ and Cu2+ in water by dried alum-sludge from a water treatment plant

作　　者：马晨阳 段润斌 杜震宇[1] Ma Chenyang;Duan Runbin;Du Zhenyu(College of Environmental Science and Engineering,Taiyuan University of Technology,Taiyuan 030024,China)

机构地区：[1]太原理工大学环境科学与工程学院

出　　处：《工业水处理》2020年第2期59-62,共4页Industrial Water Treatment

基　　金：山西省重点研发计划重点项目计划(201603D111018);山西省重点研发计划(一般)社会发展项目(201703D321009-5)

摘　　要：采用净水厂干化铝污泥吸附处理水中的Pb^2+和Cu^2+,研究了污泥投加量、pH、Pb^2+和Cu^2+初始浓度、吸附时间以及温度对吸附效果的影响。结果表明,Pb^2+和Cu^2+的去除率均随污泥投加量的增加和溶液pH的升高而增大;Langmuir模型能够准确描述干化铝污泥对Pb^2+和Cu^2+的吸附特性,20℃时其对Pb^2+和Cu^2+的饱和吸附量分别可达212.77、73.53 mg/g;干化铝污泥对Pb^2+和Cu^2+的吸附动力学符合准二级动力学模型;吸附过程为自发、吸热、熵增的反应。This paper was aimed to investigate the adsorption of Pb^2+and Cu^2+in water by dried alum-sludge(DAS)from a water treatment plant.The effects of sludge dosage,initial pH,initial concentrations of Pb^2+and Cu^2+,adsorption time and temperature on Pb^2+and Cu^2+adsorption were investigated,respectively.The results showed that the adsorption removal rates of Pb^2+and Cu^2+increased with increasing the sludge dose or pH.Langmuir isothermal model could accurately describe the adsorption characteristic of DAS adsorption on Pb^2+and Cu^2+.The maximum adsorption capacities of DAS on Pb^2+and Cu^2+at 20℃were 212.77 mg/g and 73.53 mg/g,respectively.The adsorption kinetics of DAS on Pb^2+and Cu^2+fit well with Lagergren’s pseudo-second-order kinetic model.The adsorption was a spontaneous and endothermic progress along with entropy production.

关 键 词：净水厂污泥 吸附 重金属离子 

分 类 号：X703[环境科学与工程—环境工程]