再生水河流影响区包气带土壤及浅层地下水中典型内分泌干扰物迁移机理研究

Endocrine Disrupting Chemicals (EDCs) pollution was found in vadose soil and shallow groundwater which had been affected by the reclaimed water river. However, the question of how reclaimed water river impacts on the environmental behavior of EDCs in the shallow groundwater has not been solved. This research selects typical reclaimed water river in Beijing-Tianjin-Hebei Region as study area, chooses the widely distributed and highly bio-toxic EDCs as target material, and takes hydro-geochemistry, environmental chemistry and isotope hydrology as multi-discipline to illustrate the characteristics of concentration, distribution and composition of EDCs in vadose soil and shallow groundwater system by means of field sample collecting and laboratory simulation experiment. Meanwhile, this research analyzes the effect of soil lithology in vadose zone to migration mechanism of EDCs, and it clarifies the environmental behavior and migration mechanism of EDCs in vadose soil and shallow groundwater system. This study provides scientific references to settle the vadose soil and groundwater contamination of EDCs and offers theoretical foundation to ensure the safety of groundwater resources in Beijing-Tianjin-Hebei Region.

在我国京津冀地区水资源日益匮乏背景下，再生水已经成为许多地表河流的主要补给水源。再生水河流对其周边的包气带土壤和浅层地下水造成了不同程度的内分泌干扰物（EDCs）污染。然而，EDCs渗透包气带进入浅层地下水的机制尚不清楚，影响因素尚未明确，给EDCs的治理带来困难。本研究选取京津冀典型再生水河流影响区为研究对象，以再生水中分布最广泛且生物毒性较强的EDCs作为研究目标物质，采用水文地质学，环境地球化学和同位素水文学相结合的方法，通过对研究区包气带土壤及浅层地下水样品采集分析，采用吸附实验、一维柱状模拟实验，结合多种环境和年龄示踪方法，解析包气带介质条件和EDCs空间分布的对应关系，识别包气带不同影响因素对EDCs迁移的影响机制，揭示地下水流动过程对污染物在包气带土壤和浅层地下水中迁移的影响。为京津冀再生水影响区包气带土壤及浅层地下水中EDCs污染治理与地下水资源安全保障提供理论依据。

在我国京津冀地区水资源日益匮乏背景下，再生水已经成为许多地表河流的主要补给水源。再生水河流对其周边的包气带土壤和浅层地下水造成了不同程度的污染。其中主要污染物渗透包气带进入浅层地下水的机制尚不清楚，影响因素尚未明确。本研究选取京津冀典型再生水河流影响区为研究对象，以再生水中分布最广泛的污染物（硝酸盐、重金属及有机物）作为研究目标物质，采用水文地质学，环境地球化学和同位素水文学相结合的方法，通过对研究区包气带土壤及浅层地下水样品采集分析，采用吸附实验、一维柱状模拟实验，结合多种环境和年龄示踪方法，解析包气带介质条件和污染物空间分布的对应关系，识别包气带不同影响因素对EDCs迁移的影响机制，揭示地下水流动过程对污染物在包气带土壤和浅层地下水中迁移的影响。为京津冀再生水影响区包气带土壤及浅层地下水污染治理与地下水资源安全保障提供理论依据。