污染物质在包气带中运移规律的实验研究  

Experimental Study on the Transport Patterns of Contaminants in Aeration Zone.

作　　者：阎先良 

机构地区：[1]山西省地质工程勘察院环境地质监测站,太原030008

出　　处：《环境科学》1993年第5期32-38,共7页Environmental Science

摘　　要：通过室内淋滤实验,研究了酚、氰、砷、汞、铬红粉质轻亚粘土和中砂中的积累、运移规律:①土体对污染物质吸附净化均可分为强吸附阶段、饱和吸附阶段和吸附饱和阶段;②土体对污染物质的吸附净化强度与其粒度通常呈负相关;③酚、氰在包气带中降解的主要原因是自身的挥发性与生物分解作用。证实污染物质在包气带中的主要迁移形式为:H_3A8O_3、H_2A_8O_3、CrO_4~2、Hg(OH)^-、HgOHCL,同时,包气带的pH值直接影响污染物质的迁移能力。因此,在环境地质与地下水污染的防治研究中,要全面考虑污染物质种类与包气带种类、厚度及pH值等相关因素。Based on the laboratory experiment of leaching, there were elaborated the accumulation and transport patterns of phenols, cyanides, arsenic, mercury and chromium in sandy clay and neutral dene, including: (1)the absorbing purification by soil can be classified into powerful absorption , saturating absorption and absorbing saturation stages; (2)the soil absorption and purifiction intensity of contaminants in aeration zone soil is usually in a negative correlation to the size of soil particles: (3)the reduction of phenols and cyanides in aeration zone is mainly due to their respective own volatility and biological decomposition. It was demenstrated that the main transport form of contaminants in aeration zone is H3AsO3、H2AsO3-、CrO42-、Hg(OH) +、HgOHCl. Meanwhile, the pH value in the aeration zone affected the capability of contaminants transporting. Thus, it is suggested that in the studies On environmental geology and groundwater pollution control the relative factors should be fully taken into account,including the kinds of contaminants, the kinds and thickness of aeration zone,and the pH value.

关 键 词：包气带 吸附净化 运移规律 污染物 

分 类 号：X132[环境科学与工程—环境科学]