凹凸棒石吸附地下水中氨氮的实验研究  

Experimental Research on Adsorption of Ammonium Nitrogen from Groundwater by Using Attapulgite

作　　者：张秀丽[1] 王明珊[1] 廖立兵[1] 

机构地区：[1]中国地质大学材料科学与工程学院,北京100083

出　　处：《非金属矿》2010年第6期64-67,共4页Non-Metallic Mines

摘　　要：采用甘肃和安徽明美矿物公司的凹凸棒石进行模拟地下水氨氮去除实验研究。结果表明,在氨氮浓度为10mg/L的条件下,凹凸棒石吸附氨氮的平衡时间为3h,凹凸棒石用量3.00g,最佳pH值约6～7,20℃有利于凹凸棒石对氨氮的吸附,正交实验表明,影响吸附因素大小的顺序为:pH值>氨氮初始浓度>凹凸棒石用量>温度。对吸附等温线进行线性拟合,符合Langmuir等温式,饱和吸附量分别为4.06mg/g和4.54mg/g。为凹凸棒石作为一种处理地下水材料提供了数据和理论依据。Two kinds of attapulgite from Gansu province and Mingmei Mineral Corperation of Anhui province were used to remove imitate ammonia-N from groundwater.The result showed that it was avail for attapulgite to absorb ammonia-N when the concentration of ammonia-N was 10mg/g,the equilibrium time was 3h,the dosage of attapulgite was 3.00g,the optimum pH was 6 to 7 and the temperature was 20℃.The orthogonal experiments showed that the influencing adsorption factors were that：pH value ammonia-N initial concentration attapulgite dosage temperature.To let the adsorption isotherm fit linearly,it was accorded with Langmuir equation,the saturate adsorption was 4.06 mg/g and 4.54 mg/g respectively.This experiment provided the date and theoretical basis for attapulgite to deal with groundwater.

关 键 词：凹凸棒石 氨氮 吸附 初始浓度 PH值 

分 类 号：TD985[矿业工程—选矿] X703[环境科学与工程—环境工程]