改性铝土矿浮选尾矿处理含Cr(Ⅵ)废水的试验研究  

Treatment of Wastewater Containing Chromium(Ⅵ) by Modified Flotation Tailings of Bauxite

作　　者：兰叶[1] 王毓华[1] 李艳[1] 

机构地区：[1]中南大学资源加工与生物工程学院,湖南长沙410083

出　　处：《矿冶工程》2006年第6期43-46,共4页Mining and Metallurgical Engineering

摘　　要：以铝土矿尾矿为原料,氯化铁为改性剂,制得改性尾矿,用其吸附高浓度含Cr(Ⅵ)溶液中的Cr6+。试验表明,在环境温度为30℃,改性尾矿投加量为0.2 g/mL,pH值为3.52条件下,对Cr(Ⅵ)含量为150 mg/L的溶液,Cr(Ⅵ)去除率可达到90.9%。改性尾矿对Cr2O72-的吸附复合Langmu ir方程和Freund lich方程。Modified tailings, prepared using bauxite tailing as the raw material and ferric chloride as the modifier, can be used for adsorption and removing of hexavalent chromium from aqueous solution. The removal rate of hexavalent chromium reached 95.22% under the following conditions： hexavalent chromium mass concentration of 150 rag/L, modified tailings dosage of 0.2 g/mL, adsorption temperature of 30 ℃, aqueous solution pH value of 3.52 and adsorption time of 2 h. The adsorption process conforms to the Langmuir and Freundlich isotherm adsorption equation.

关 键 词：铝土矿 浮选尾矿 改性 吸附 含Cr(Ⅵ)废水 

分 类 号：X703[环境科学与工程—环境工程]