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  • 宋泽峰,王园园,杨悦锁,宋晓明,李亚娟.胶体迁移及其对典型类固醇雌激素的吸附[J].环境工程学报,2019,13(5):1082-1091.DOI:10.12030/j.cjee.201810101    [点击复制]
  • SONG Zefeng,WANG Yuanyuan,YANG Yuesuo,SONG Xiaoming,LI Yajuan.Migration of colloids and their adsorption of typical steroid estrogens[J].,2019,13(5):1082-1091.DOI:10.12030/j.cjee.201810101   [点击复制]
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胶体迁移及其对典型类固醇雌激素的吸附
宋泽峰1,2,王园园1,杨悦锁1,3,宋晓明1,李亚娟1
0
(1.沈阳大学环境学院,区域污染环境生态修复教育部重点实验室,沈阳 110044;2.河北地质大学资源与环境工程研究所,石家庄 050031;3.吉林大学新能源与环境学院,长春 130021)
摘要:
研究胶体自身的可迁移性和对污染物的可吸附性能够为地下环境中胶体对污染物的携带迁移作用提供重要依据。通过动态柱实验和静态批实验研究二氧化硅胶体、伊利石胶体和胡敏酸胶体在饱和多孔介质中的可迁移性以及对雌酮和雌二醇的吸附作用。结果表明:不同胶体在饱和多孔介质中的可迁移性有所差异,胡敏酸胶体和二氧化硅胶体分别在石英砂柱和河砂砂柱中迁移性最强,而伊利石胶体在2种多孔介质中的迁移性均较弱;准二级动力学模型对胶体吸附雌激素的数据拟合效果最好,吸附速率的控制因素可能包括表面吸附、化学络合等;Langmuir模型对胶体吸附雌激素的拟合效果较Freundlich模型更好,推测胶体对雌激素的吸附为单层吸附,3种胶体对雌酮和雌二醇的最大吸附量分别为90.09~3 333 mg?kg-1和116.28~2 000 mg?kg-1。因此,胶体的可迁移性和对雌激素的吸附作用能够为胶体影响雌激素在地下环境中的迁移提供理论指导。
关键词:  胶体迁移  类固醇雌激素污染  土壤-地下水系统  胶体吸附作用
DOI:10.12030/j.cjee.201810101
投稿时间:2018-10-17
基金项目:国家自然科学基金资助项目41472237;沈阳市科技计划资助项目Z17-5-079国家自然科学基金资助项目(41472237);沈阳市科技计划资助项目(Z17-5-079)
Migration of colloids and their adsorption of typical steroid estrogens
SONG Zefeng1,2,WANG Yuanyuan1,YANG Yuesuo1,3,SONG Xiaoming1,LI Yajuan1
(1.Key Lab of Regional Environment and Eco-Restoration, Ministry of Education, College of Environment, Shenyang University, Shenyang 110044, China;2.Institute of Resources and Environmental Engineering, Hebei GEO University, Shijiazhuang 050031, China;3.College of New Energy and Environment, Jilin University, Changchun 130021, China)
Abstract:
The study of colloids mobility and their adsorption of contaminants may provide an important basis for the carrying and migration of contaminants by colloids in subsurface environment. The mobility of silica colloids, illite colloids and humic acid (HA) colloids through saturated porous medium and their adsorption of estrone (E1) and estradiol (E2) were studied through dynamic column and static batch experiments. The results showed that there was significant difference in the migration properties among the three types of colloids in saturated porous media. HA and silica colloid presented the highest mobility in the quartz sand column and the river sand column, respectively, while illite colloid had poor migration performances in both porous media. The pseudo-second order kinetic model provides the best fitting for the data of estrogens adsorption on colloids. Surface adsorption and chemical complexation may be the control factors of adsorption rate. The estrogen adsorption isotherms on colloids could be better fitted by Langmuir model than Freundlich model, which may indicate that the monolayer adsorption of estrogen occurred on colloids. The maximum adsorption capacities of estrone and estradiol on colloids were 90.09~3 333 mg?kg-1 and 116.28~2 000 mg?kg-1, respectively. Therefore, colloidal mobility and their adsorption of typical steroid estrogens can provide theoretical guidance for the effect of colloids on estrogens migration in subsurface environment.
Key words:  colloids migration  steroid estrogens pollution  soil-groundwater system  colloidal adsorption