摘要
采用煤质活性炭和斜发沸石填料滤柱,研究比较了四种邻苯二甲酸酯类在3种进水浓度(20、60、100μg·L-1)和三个滤速条件(4、5、6m·h-1)下的吸附去除性能。试验结果表明,从单种物质的去除效果看,20μg·L-1浓度进水时,活性炭对四种邻苯二甲酸酯的去除率均优于沸石;在60μg·L-1和100μg·L-1浓度进水时,活性炭滤柱对邻苯二甲酸二甲酯、邻苯二甲酸二丁酯的去除率高于沸石滤柱,而对于邻苯二甲酸二(2-乙基己基)酯和邻苯二甲酸二辛酯两种物质,两个滤柱去除效果比较接近。滤柱出水浓度均随滤层厚度的增加而下降;滤速提高时,沸石滤柱和活性炭滤柱对四种酯类的去除率均有所下降,但对4种酯类物质的去除性能与4m·h-1滤速时相似。作为饮用水处理中的一种替代性填料,沸石具有重要的研究开发前景。
Phthalate esters （PAEs） are one of the most ubiquitous classes of compounds in water environment which have been characterized as endocrine disruptors. In the experiment coal activated carbon and an kind of zeolite （clinoptilolite） being used as filter media, absorption performance of four sorts of PAEs was studied under condition of 3 influent concentrations （20,60,100μg·L^-1） and 3 filtration velocities （4,5,6 m· h^-1）. The results show that for removal of single PAE, the activated carbon has higher removal efficiency than the zeolite for all sorts of PAEs under 20μg· L^-1 influent concentration; while under 60 and 100 μg·L^-1 concentration, the activated carbon filter showed higher removal efficiency for dimethyl phthalate （DMP） and di-n-butyl phthalate （DBP）, but for di（2-ethylhexyl） phthalate （DEHP） and di-n-octyl phthalate （DOP）, the two media has close removal performance. The PAEs concentration in the filter effluents declined with the increase of depth of filter bed; and the removal efficiency on PAEs of the two filters both descended with increasing filtration velocity. The performance under higher filtration velocities for four sorts of PAEs was similar to 4 m· h^-1. The zeolite has showed its applicable perspective as an alternative filtration media in drinking water treatment.
出处
《水处理技术》
CAS
CSCD
北大核心
2009年第3期57-61,共5页
Technology of Water Treatment
基金
重庆市科技攻关计划资助项目(CSTC2006AB7055)
关键词
邻苯二甲酸酯
活性炭
沸石
吸附
phthalate esters
activated carbon
zeolite
adsorption
