硅酸钙处理富营养化湖水中氨氮的实验研究  

Ammonium removal from eutrophic lake water by using calcium silicate

作　　者：韩剑宏[1] 杨冬梅[1] 刘派[2] 

机构地区：[1]内蒙古科技大学能源与环境学院,内蒙古包头014010 [2]华南理工大学轻工与食品学院,广东广州510641

出　　处：《生态环境学报》2013年第3期490-493,共4页Ecology and Environmental Sciences

基　　金：国家科技支撑计划项目(2009BAB49B02)

摘　　要：湖泊的富营养化问题日益严重,已给人类的生产、生活带来了极大的危害。而氨氮废水的大量排放,使原本恶化的湖泊水雪上加霜。为了去除富营养化湖水中氨氮,研究了硅酸钙对氨氮的吸附性能。经检测可知水样中氨氮的质量浓度为1.12mg L-1,实验结果表明,用粒径大小为100目的硅酸钙吸附剂处理100 mL的水样,当投加量为1.0 g,pH为8,震荡时间为60 min时吸附达到平衡,硅酸钙对富营养化湖水中氨氮的去除率达到81.67%;其吸附等温线符合Langmuir和Freundlich吸附等温式,线性相关系数分别为0.963 9和0.979 3,最大吸附量为6.60 mg g-1;由此可见硅酸钙能够很好地吸附富营养化水体中的氨氮。Ammonia nitrogen has seriously jeopardized the lake water, that cause eutrophic phenomenon. Which has brought great harm to human production and life. This experiment presents a study of the removal of ammonia nitrogen from eutrophic lake water using calcium silicate. The concentration of ammonia nitrogen in water samples is 1.12 mg·L-1. The results of this experiment show that the removal rate of ammonia nitrogen could reach 81.67% when adsorption is equilibrious, using100 mesh of calcium silicate, as pH is 8, the dosage of calcium silicate is 1.0 g per I00 mL water samples, and the oscillating time is 60 min. The results show that the adsorption plots fit to Langmuir and Freundlich models very well,and the correlation coefficient of Langmuir and Freundlich isotherms were 0.963 9 and 0.979 3, with the maximum ammonium adsorption capacity of 6.60 mg·g-1. So calcium silicate can effectively remove ammonia nitrogen from eutrophic lake water.

关 键 词：硅酸钙 富营养化 湖水 吸附 氨氮 

分 类 号：X524[环境科学与工程—环境工程]