项目名称: 利用时域反射技术测定土壤中的非水相液体研究
项目编号: No.41271241
项目类型: 面上项目
立项/批准年度: 2013
项目学科: 天文学、地球科学
项目作者: 巨兆强
作者单位: 中国科学院遗传与发育生物学研究所农业资源研究中心
项目金额: 75万元
中文摘要: 有机化合物对土壤和地下水资源污染已逐渐成为一个非常严重的全球性环境问题。绝大部分有机污染物在水中的溶解度非常小,并以液态形式存在于土壤中,即为非水相液体(NAPLs)。因此,有必要测定土壤中非水相液体的含量以监测地下有机污染物。时域反射技术(TDR)可以被用来测定土壤中非水相液体含量。本研究拟通过系统研究土壤介电特性和电导率与土壤非水相液体含量之间的关系,分析土壤质地和非水相液体类型对时域反射技术测定土壤非水相液体含量的影响,深入探讨应用时域反射技术确定土壤中非水相液体的方法,改进和发展测定土壤中非水相液体含量的预测模型。该研究不仅有助于深入认识土壤中非水相液体和水分的关系,而且对研究污染土壤的水分运动和溶质运移等土壤物理过程以及有机化合物污染土壤和地下水的修复等环境治理问题具有重要的应用价值。
中文关键词: 时域反射技术;非水相液体;介电常数;土壤电导率;热性质
英文摘要: Soil and groundwater contamination by non-aqueous phase liquids (NAPLs) has become a serious environmental issue. Therefore, it is necessary to estimate the NAPLs content to detect and monitor the NAPLs contamination in soil and groundwater. Time domain reflectometry (TDR) has recently been applied to determine the NAPLs content in subsurface soils. This study is to investigate the relationships between the NAPLs content and soil dielectric properties, electrical conductivity. The effects of soil and NAPLs types on the NAPLs content determined by TDR will be discussed. And then the simulated methods for the NAPLs content in soils estimated by TDR will be compared. Accordingly it is to develop an improved model for the soil NAPLs content. This study not only helps to understanding the relationships between non-aqueous phase liquids and water in soil, but it is benefit to study solute transport in the polluted soil, and the remediation of soil and groundwater contamination by organic pollutant.
英文关键词: Time Domain Reflectometry;Non-aqueous phase liquids;Soil electrical conductivity;Dielectric constant;Soil thermal properties