摘要
废弃茶叶等非活性生物质脱除废水中铬具有广阔的发展前景。采用室内吸附实验方法,考察了振荡时间、铬离子初始浓度、加入茶渣量、pH及茶叶粒径等对废水铬吸附率的影响,得出废弃茶叶渣对Cr6+最佳的吸附条件。结果表明,当废水的pH为7、振荡时间为1 h时,茶叶渣对浓度为30 mg/L和50 mg/L的Cr6+溶液的吸附最佳。且废水的pH对吸附效果的影响最大,振荡时间次之。
To treat chromium of waste water by waste tea the prospect is cheerful.The experiment showed that the waste tea had fine adsorption effects on 30mg/L and 50 mg/L chromium（Cr^6＋）,and the adsorption rate could reach 80%.Four factors influencing adsorption effects of waste tea were studied,including the initial concentration of chromium,quantity of the waste tea,pH and the soaking time,and for the last three factors by using orthogonal experiment.The results indicated that the optimum condition was pH 7 and soaking time 1 h.The reaction process may occur as chemical adsorption as adsorption effects varied with pH,but could not ascertain the existence of physical adsorption.
出处
《云南农业大学学报（自然科学版）》
CAS
CSCD
北大核心
2010年第5期675-679,共5页
Journal of Yunnan Agricultural University:Natural Science
基金
重庆工商大学创新基金(083021)
重庆工商大学青年基金(0852005)
关键词
污染废水
Cr6+
吸附
废弃茶叶
polluted wastewater
chromium（Cr^6＋）
adsorption
waste tea
