化工环保2012，Vol.32Issue(4)：377-380,4.
煤矸石的改性及其对稀土生产废水中氨氮的吸附
Modification of Coal Gangue and Adsorption of Ammonia Nitrogen in Rare Earth Production Wastewater
摘要
Abstract
4 kinds of modified coal gangue adsorbents were prepared by thermal modification, hydrochloric acid modification, sulfuric acid modification and alkali modification respectively. The effects of adsorption conditions on the removal of ammonia nitrogen from rare earth production wastewater and the adsorption mechanism were studied. The optimum adsorption conditions are as follows: adsorbent dosage 0.02 g/mL, oscillation time 2.5 h, wastewater pH 7-8; The order of ammonia nitrogen removal efficiencies of the 4 adsorbents is as follows: alkali modified gangue>sulfuric acid modified gangue>hydrochloric modified gangue>thermally modified gangue; The ammonia nitrogen removal efficiency of alkali modified gangue is the highest(59.19%); Ammonia nitrogen adsorption on the alkali modified gangue accords with Langmuir equation and Freundlich equation well and Temkin equation to a certain degree.关键词
煤矸石/改性/吸附剂/稀土/氨氮/废水处理Key words
coal gangue/modification/adsorbent/rare earth/ammonia nitrogen/wastewater treatment分类
建筑与水利引用本文复制引用
杜明展,陈莉荣,李玉梅,窦艳铭..煤矸石的改性及其对稀土生产废水中氨氮的吸附[J].化工环保,2012,32(4):377-380,4.基金项目
内蒙古自治区自然科学基金资助项目(2010MS0609) （2010MS0609）
内蒙古自治区高等学校科学研究项目(NJ10094) （NJ10094）
教育部"春晖计划"科研项目(Z2009-1-01028). （Z2009-1-01028）
