摘要
探讨了经Al3+改性并煅烧的膨润土对含氨氮废水的吸附特性,考察了pH、反应温度、反应时间、改性膨润土的用量等因素对改性膨润土吸附性能的影响.结果表明,经Al3+改性的膨润土对氮有很好的吸附性能,且当膨润土中Al3+质量分数为2.0%、经300℃煅烧2 h,在pH=6,Al3+改性的膨润土的用量为8 g/L,吸附时间为30 min的条件下,对100 mg/L含氮废水的去除率可达到92%,处理后的废水含氮量小于15 mg/L,达到了国家一级排放标准.
The adsorption characteristics of the bentonite,which is modified by Al^3＋ and calcined, are studied. The influences of the factors, such as pH, reaction temperature, time, the amount of modified bentonite on the adsorption performance of modified bentonite are investigated. The results show that the bentonite modified by Al^3＋ has good adsorption performance to N2 and the removal rate to N2-containing wastewater with the concentration of 100 mg/L can reach 92 % and the N2 content in the wastewater. After the processing wastewater of containing nitrogen quantity is smaller than 15 mg/L, has achieved the national level emissions standard.
出处
《河南科学》
2008年第5期608-610,共3页
Henan Science
基金
湖北省湖北省自然科学基金项目(2005ABAO53)
关键词
膨润土
改性
吸附
氨氮废水
bentonite： modification
adsorption
ammonia nitrogen of wastewater
作者简介
程银芳（1967-），女，湖北省黄梅人，高级讲师，主要从事环境工程的研究工作．
