摘要
文章用盐酸对膨润土、高岭土、凹凸棒土及沸石进行了改性研究,对含磷废水的吸附处理结果表明,改性后的实验样品对磷的净化能力明显增强,去除率分别增加膨润土27.45%、沸石19.11%、高岭土39.7%、凹凸棒土11.3%,最大去除率可达到膨润土45.59%、沸石32.84%、高岭土77.45%、凹凸棒土30.9%。膨润土、沸石、高岭土的改性随着酸用量的增加对磷的吸附效果随之增加,凹凸棒土最佳酸用量为3%(体积分数)。处理模拟的废水的结果表明,在改性后的高岭土投加量为0.5 g/25 mL废水时,对磷的去除率达到95.9%,吸附后水中的磷浓度为0.49 mg/L,处理后水中的磷浓度达到废水排放一级标准的要求。四种粘土样品改性前后对磷的吸附特征可以用Langmuir方程和Freundlich方程描述。
Clay minerals including bentonites,attapulgite,zaolinite and zeolite are modified with hydrochloric acid.This paper describes an adsorption experiment of wastewater containing phosphate by the modified clay minerals,investigating the enhanced adsorption capacity for phosphate.The experimental result shows the substantial increases for different kinds of clay minerals in terms of phosphate adsorption capacity which is strengthened with increase of amount or hydrochloric acid used for the modification.Furthermore,the adsorption well fits both Langmuir equation and Freundlich equation.
出处
《环境科学与技术》
CAS
CSCD
北大核心
2011年第9期174-177,204,共5页
Environmental Science & Technology
关键词
矿物材料
吸附
磷
去除率
clay minerals
adsorption
phosphate
rate of removing
