废啤酒酵母同步吸附水中Pb^(2+)、Zn^(2+)、Cd^(2+)的研究  

Study on the waste beer yeast used for synchronous adsorption of Pb^(2+),Zn^(2+),Cd^(2+) from aqueous solutions

作　　者：彭喜[1] 戴友芝[1] 李小娜[1] 刘坚[1] 胡维[1] 陈庆[1] 

机构地区：[1]湘潭大学环境科学与工程系,重金属污染控制湖南省普通高等学校重点实验室,湖南湘潭411105

出　　处：《工业水处理》2013年第9期27-30,共4页Industrial Water Treatment

基　　金：国家十一五"水体污染控制与治理"科技重大专项增补课题(2010ZX07212-008)

摘　　要：利用废啤酒酵母同步吸附处理含Pb2+、Zn2+、Cd2+废水,考察了初始pH、反应时间和初始浓度等因素对去除率的影响,并对吸附动力学进行探讨。结果表明:废啤酒酵母对Pb2+、Zn2+、Cd2+同步吸附去除率大小依次为Pb2+>Cd2+>Zn2+;三者之间存在竞争吸附;拟二级动力学方程相关系数R2>0.99,对Pb2+和在低浓度条件下拟合情况更好,内扩散和液膜扩散联合控制吸附速率。Waste beer yeast has been used for the adsorption treatment of wastewater containing Pb2＋,Zn2＋,Cd2＋ synchronously.The effects of the factors,such as initial pH,reaction time and initial concentration on removing rate are investigated,and its adsorptive dynamics is discussed.The results show that the sequence of synchronous adsorptive removing rates caused by waste bear yeast on Pb2＋,Zn2＋,Cd2＋ is still Pb2＋＞Cd2＋＞Zn2＋.There exists competitive adsorption among the three kinds of heavy metal ions.The correlation coefficient of pseudo-secondary dynamics equation is R2＞0.99,having better fittings with Pb2＋ under low concentration condition.The adsorption rate is jointly controlled by internal diffusion and liquid membrane diffusion.

关 键 词：废啤酒酵母 同步吸附 竞争吸附 重金属离子 

分 类 号：X703.1[环境科学与工程—环境工程]