水文地质工程地质2009，Vol.36Issue(6)：123-126,130,5.
洛河冲积平原包气带对入渗水污染物净化能力研究
A study of purification capacity of vadose zone on pollutants from infiltration water in the Luohe alluvial plain
摘要
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.关键词
包气带/污染物/自净Key words
vadose zone/ groundwater pollution/ self-purification ability分类
资源环境引用本文复制引用
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):123-126,130,5.基金项目
河南省重点水利科研项目(SL2005001) （SL2005001）
国家星火计划重点项目(2007EA761001) （2007EA761001）
