| 洛河冲积平原包气带对入渗水污染物净化能力研究 |
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| 引用本文： | 王现国,郭立.洛河冲积平原包气带对入渗水污染物净化能力研究[J].水文地质工程地质,2009,36(6):123-126. |
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| 作者姓名： | 王现国 郭立 |
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| 作者单位： | 成都理工大学环境与土木工程学院； 河南省地矿局第二水文地质工程地质队； 湖北大学资源环境学院； |
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| 基金项目： | 河南省重点水利科研项目，国家星火计划重点项目 |
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| 摘 要： | 包气带是地下水补给和地下水污染的主要通道,包气带的性质直接控制了地下水的污染化速度和程度。文章以洛阳市区洛河河床岩性(以砂砾石为主)以及由亚粘土、亚砂土、中细砂等介质构成的包气带为研究对象,分析河床和包气带对污染物的自净能力,并对其天然的自净机制进行了简要分析,结论如下:洛河河床岩性对各种污染物(NO3-除外)的净化能力均达到90%以上;亚粘土、亚砂土、中细砂等包气带介质层对重金属(Cu2+等)有很强的净化能力,而对Cl-、Cr6+的净化能力则较弱,在短时间内介质中就达到饱和而失去净化能力;在环境条件相近及水文地质条件基本相同的条件下,包气带厚度与地下水的污染程度呈负相关关系;污水经过包气带,能有效地去除污水中的有害物质,防止地下水污染。 更多还原
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| 关 键 词： | 包气带 污染物 自净 |
A study of purification capacity of vadose zone on pollutants from infiltration water in the Luohe alluvial plain |
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| WANG Xian-guo,Guo Li.A study of purification capacity of vadose zone on pollutants from infiltration water in the Luohe alluvial plain[J].Hydrogeology and Engineering Geology,2009,36(6):123-126. |
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| Authors: | WANG Xian-guo Guo Li |
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| Affiliation: | 1.College of Environment and Civil Engineering,Chengdu University of Technology,Chengdu 610059,China;2.No.2 Hydrogeological and Engineering Geological Group,Bureau of Geoexploration and Mineral Development of Henan Province,Zhengzhou 450053,China; 3.Faculty of Resources and Environmental Science,Hubei University,Wuhan 430062,China |
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| Abstract: | Vadose zone is the main channel of groundwater recharge and pollution. The nature of the vadose zone directly controls the velocity and extent of groundwater pollution. In this paper, lithology (mostly sand and gravel) and the vadose zone of the Luohe bed near Luoyang are examined. The Luohe bed is composed of sub-clay, sub-sand, medium fine sand and other media. The self-purification ability of pollutants of the river bed and the vadose zone is analyzed. The natural self-purification mechanism is briefly analyzed. The results show that the self-purification ability of pollutants of the Luohe bed is as high as 90% (except NO_3~- ) . Sub-clay, sub-sand, medium fine sand and other dielectric layer of vadose zone have a strong capacity to purify heavy metal (Cu~(2+) ), but is weak to clean Cl~- and Cr~(6+), because the media can reach saturation state and lose the capacity purification in a short time. Under the similar environmental conditions and the same basic hydrogeological conditions, the thickness of vadose zone has a negative correlation to groundwater pollution. Through the vadose zone can effectively remove the harmful substances in waste water and prevent groundwater pollution. |
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| Keywords: | vadose zone groundwater pollution self-purification ability |
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