• 责任者：Wang Xianguo (College of Environment and Civil Engineering ; Chengdu University of Technology ; Chengdu 610059 ; China) ; Guo Li
• 刊名：Hydrogeology and Engineering Geology
• 出版年：2009
• 卷期：36(6)
• 关键词：地下水污染 ; groundwater pollution ; 包气带 ; unsaturated zones ; 环境自净 ; environmental self-purification ; 河南 ; Henan Province
• 页码：p.123-126，130
• 图表：5 illus., 5 tables, 12 refs.
• 分类号：1800
• issnNo：ISSN1000-3665
• isbnNo：CN11-2202/P

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 (Cu²⁺), but is weak to clean Cl^-and Cr⁶⁺, because the media can reach saturation state and lose the capacity purification in a short time.