摘要
研究废茶枝叶中茶多酚对Cr(Ⅵ)在黏土介质中的吸附作用。探讨pH、反应时间、废茶枝叶投加量、反应温度等因素对反应的影响,确定最佳反应条件。简述了茶多酚、Cr(Ⅵ)和黏土之间相互作用的机理。结果表明:在含Cr(Ⅵ)的黏土中投加废茶枝叶时,黏土对Cr(Ⅵ)吸附能力明显增强,作用机理主要是在中性条件下茶多酚将Cr(Ⅵ)还原为Cr(Ⅲ),并与Cr(Ⅲ)形成配合物,该络合物与黏土颗粒有较强的结合能力,增强了黏土对铬的固定作用。
Influence of TP on adsorption of hexavalent chromium in the clay was investigated.Effects of reaction time,pH,concentrations of TP and adding amount were studied.The reduction of Cr(Ⅵ)was examined while the optimum reaction conditions were determined.TP could enhance the adsorption of Cr(Ⅵ)because of the complexion reaction between TP and Cr(Ⅵ).The reaction mechanisms of TP with chromium and clay surfaces were certified.
出处
《环境工程》
CAS
CSCD
北大核心
2008年第2期61-63,共3页
Environmental Engineering
基金
国家自然科学基金资助项目(50679015)
关键词
茶多酚
六价铬
黏土
配合作用
吸附
TP,hexavalent chromium,clay,complexion and adsorption
