作者：付康, 张涵, 廖镭
作者单位：西南交通大学地球科学与环境工程学院, 四川 成都 611756
关键词：非正规垃圾填埋场;渗滤液;重金属;土壤污染;生物修复
摘要：
非正规垃圾填埋场在我国小城市较普遍，主要分布于城郊和农村地区，利用天然地形进行填埋，多数未采取或仅采取简易防渗措施。随着填埋时间推移，填埋量增多，产生的渗滤液下渗造成土壤和地下水污染。本研究以泸州市某非正规垃圾填埋场场地土壤污染调查及治理为例，设置15个土壤采样点进行土壤重金属、有机物含量检测，经过分析获取该场地污染特征因子及场地污染程度。结果表明，该场地土壤重金属含量超出参考值的元素为镉、砷、汞，有机物浓度未超标。在此基础上，针对场地的土壤污染特性提出一套适合该非正规垃圾填埋场场地土壤污染修复方案：对重度污染土壤采用挖掘外运烧砖回收的处置方式，对轻度污染土壤采用植物微生物联合修复方式。本研究可为我国非正规垃圾填埋场场地土壤污染及治理提供一定参考价值。
Discussion on soil pollution and remediation methods of irregular landfill sites
FU Kang, ZHANG Han, LIAO Lei
Faculty of Earth Sciences and Environmental Engineering, Southwest Jiaotong University, Chengdu 611756, China
Abstract: Informal landfills are common in small cities in China. They are mostly located in suburbs and rural areas. Most of informal landfills have no or few anti-seepage measures. As time passes, the amount of landfill increases, and leachate infiltration into soil and groundwater causes environmental pollution. This study focused on the soil pollution and remediation strategy of contaminated soil of an informal landfill in Luzhou City. Soil samples were collected in 15 sampling points to measure heavy metals and organic matter contents. Based on laboratory analysis, the pollution factors and pollution degree of the site were obtained. Heavy metal cadmium, arsenic and mercury content in the landfill exceed the standard values. The level of organic matter is very low or not detected. A set of strategy suitable for controlling the soil pollution is proposed for the site: brick baking is adopted for heavily contaminated soil, and a combined remediation of plant microorganisms for lightly contaminated soil. It can provide reference for soil pollution control in informal landfill sites in China.
Keywords: informal landfill;leachat;heavy metal;soil contamination;bioremediation
2018, 44(11): 81-87 收稿日期: 2018-09-06;收到修改稿日期: 2018-10-09
基金项目: 国家自然科学青年基金项目（51509215）；成都市科技局科技惠民项目（2015HM0100350SF）
作者简介: 付康(1993-),男,山东临沂市人,硕士研究生,专业方向为土壤污染修复技术研究
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