米糠和麦麸对水中Cr(VI)的吸附研究

被引:36
作者
许彩霞
戴友芝
吴爱明
机构
[1] 湘潭大学环境工程系
关键词
米糠; 麦麸; Cr(VI); 生物吸附; 等温线; 动力学; 热力学;
D O I
10.16796/j.cnki.1000-3770.2007.09.013
中图分类号
X703.1 [技术方法];
学科分类号
083002 ;
摘要
以米糠(RB)和麦麸(WB)作吸附剂对水中Cr(VI)的去除进行了试验研究。考察了吸附时间、初始浓度、吸附剂量、pH和粒径对吸附量的影响。当pH为1.0时,二者对Cr(VI)的吸附量均达到最大;Cr(VI)的去除随RB粒径增大而减小,随WB粒径增大而增大;RB对Cr(VI)的吸附遵循Freundlich等温线,而WB对Cr(VI)的吸附则遵循Langmuir等温线,二者对Cr(VI)的吸附都更符合拟二级动力学模型,热力学参数说明吸附过程是自发进行的吸热反应。试验结果表明RB和WB是两种有效去除废水中Cr(VI)的生物吸附剂,相比之下WB的效果更好。
引用
收藏
页码:53 / 56
页数:4
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