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| 不同Eh条件下弱透水层中硝酸盐截留能力 | |
| 引用本文： | 赵晓波,谢雪,李莹,马臻,李绪谦,樊凯.不同Eh条件下弱透水层中硝酸盐截留能力[J].吉林大学学报(地球科学版),2013,43(5):1603-1607. |
| 作者姓名： | 赵晓波 谢雪 李莹 马臻 李绪谦 樊凯 |
| 作者单位： | 1.吉林大学环境与资源学院，长春130021; 2.北京建筑大学资产与后勤管理处，北京100044; 3.吉林省固体废物管理中心，长春130051 |
| 基金项目： | 国家自然科学基金项目(40872154) |
| 摘 要： | 为了研究硝酸盐在不同Eh条件下通过弱透水层的迁移机理及转化形式，用天然黏土作为渗透介质弱透水层，在高渗透压条件下进行室内实验，模拟地下水中硝酸盐通过弱透水层的迁移转化过程。结果表明：单位质量黏土截污容量为1.45 mg/g，阻截率R=92%，不同Eh条件下（Eh分别为0、-100、-200 mV）弱透水层对硝酸盐的阻截能力都很强；低氧化还原电位有利于弱透水层吸附硝酸盐。弱透水层中硝酸盐的转化途径表明，弱透水层对硝酸盐的阻截能力很强,是微孔隙截留作用、机械过滤、离子吸附、协同吸附以及较弱的微生物共同作用的结果。 |
| 关 键 词： | Eh条件 弱透水层 硝酸盐 阻截能力 |
| 收稿时间： | 2012-12-26 |
Blocking Capacity of Aquitard for Nitrate at Different Eh |
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| Zhao Xiaobo;Xie Xue;Li Ying;Ma Zhen;Li Xuqian;Fan Kai.Blocking Capacity of Aquitard for Nitrate at Different Eh[J].Journal of Jilin Unviersity:Earth Science Edition,2013,43(5):1603-1607. | |
| Authors: | Zhao Xiaobo;Xie Xue;Li Ying;Ma Zhen;Li Xuqian;Fan Kai |
| Institution: | 1.College of Environment and Resource, Jilin University ,Changchun130021,China; 2.Department of Assets and Logistica Management，Beijing University of Civil Engineering and Architecture,Beijing100044,China; 3.Jilin Province Waste Solid Management Center, Changchun130051, China |
| Abstract: | In order to study the mechanism of migration and transformation of nitrate in aquitard under different Eh, the process of migration and transformation of nitrate in groundwater by passing through aquitard was modeled by adopting clay as aquitard in laboratory under high osmotic pressure. The results showed that at most 1.45 mg nitrate could be blocked by 1 g clay and the blocking rate R=92%. The blocking capacity of aquitard is very strong for nitrate when Eh is at 0 mV, －100 mV and －200 mV. Low Eh is benefit for nitrate adsorption in aquitard. The transformational mechanism of nitrate in aquitard showed that micro-pore blocking, filtering, ion adsorption, cooperative adsorption and microorganisms give aquitard a very strong blocking capacity for nitrate. |
| Keywords: | Eh conditions aquitard nitrate interdiction capabilities |
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