作　　者： ; ; ; ;

机构地区： 北京交通大学土木建筑工程学院市政与环境工程系

出　　处： 《工业用水与废水》 2007年第1期28-31,共4页

摘　　要： 以好氧颗粒污泥作为一种新型的生物吸附剂,对水中Cd2+进行吸附研究。分析了初始Cd2+浓度、初始污泥浓度以及pH值对吸附的影响。试验表明,Langmuir等温方程和Freundlich等温方程都能拟合试验所得吸附数据。当溶液温度维持在25℃时,pH值为6～7时具有较好的吸附效果。在此条件下,当Cd2+的质量浓度为5～150 mg/L,吸附时间为4 h时,颗粒污泥最大吸附容量为69.7 mg/g,最大去除率为95.9%。这说明颗粒污泥是一种有效的、经济的处理含Cd2+废水的生物吸附剂。 As a new type of biosorbent, aerobic granule sludge was studied on its adsorption efficiency on Cd^2＋ in water. The effects of initial Cd^2＋ concentration, initial sludge concentration, pH value on adsorption were analyzed. The results showed that, Langmuir isotherm equation and Freundlich isotherm equation could both describe the adsorption data very well. When the solution temperature maintained 25 ℃, pH value was 6-7, a good adsorption effect could be obtained. Under the above conditions, when the mass concentration of Cd^2＋ was 5-150 mg/L, the adsorption time was 4 h, the maximum adsorption capability was 69.7 mg/g, and the maximum removal efficiency reached 95.9%. It can draw a conclusion that, granular sludge is an effective and economic biosorbent for Cd^2＋ - containing wastewater treatment.

关 键 词： 好氧颗粒污泥 生物吸附 等温吸附线

领　　域： [环境科学与工程]