垃圾渗滤液污染地下环境三维电学监测系统研究  

Design and Experiment of a 3-D Geoelectrical System for Monitoring Underground Environment at Waste Disposal Site

作　　者：郭健[1] 郭秀军[1] 杨发昌[2] 魏丽[1] 贾永刚[1] 李鸿江[1] 

机构地区：[1]中国海洋大学,山东青岛266003 [2]泰安市公路局工程二处,山东泰安271000

出　　处：《中国海洋大学学报（自然科学版）》2007年第S2期149-153,共5页Periodical of Ocean University of China

基　　金：国家自然科学基金项目(40172088)资助

摘　　要：基于垃圾渗滤液渗入地层后引起地下介质导电性变化规律,设计用于垃圾场运营期和废弃后地下环境污染的预警系统。在垃圾场建设期将电极传感器网状布设于防渗层的下方,垃圾场启用后通过电极向下部地层供电和测量来实现对地下介质电性分布特征的测试。通过对比不同时期测得视电阻率剖面变化特征,可以确定垃圾场渗漏与否、渗漏点的位置及数量、渗滤液形成的羽状体在地下的形态和扩散规律,以便及时采取措施防止渗滤液造成严重的地下环境污染。室内模拟实验证实了渗滤液的渗入会引起被污染土层的电阻率降低,污染区的扩散表现为不同时期测得电剖面上低阻异常区的变化,异常区的分布范围和实际污染区具有良好的吻合。该系统的设置是实现环保型、智能型垃圾填埋场的重要举措。The electrical resistivity of soil layers always varies if they are contaminated by the leakage of landfill leachate.An in-situ electrical resistivity detecting system was designed to investigate the contaminated area at in-use and abandoned waste disposal sites.The electrodes are set as a grid below the HDPE membrane during the period of waste disposal construction.The sampling device can control electrodes to generate a DC electrical field and measure the electrical potential.An electrical resistivity map of the soil layers can be obtained in this way.By comparing the resistivity maps measured at different times,the position of leakage in the remembrances and the diffusion of leachate plumes in the soil layers can be detected and monitored so that possible pollution can be prevented as soon as possible.The experimental results in the lab show that the resistivity of contaminated soil layers always decreases with the increase of the leachate,the abnormal low-resistivity area in the apparent resistivity map can change with the diffusion of leachate plumes and the size of the abnormal area is in agreement with the contaminated area.With the establishment of this system,an intelligent and green landfill can be achieved.

关 键 词：垃圾渗滤液 土壤污染 电阻率法 监测系统设计 实验研究 

分 类 号：X85[环境科学与工程—环境工程]