PAHs behavior in surface water and groundwater of the Yellow River estuary: Evidence from isotopes and hydrochemistry
PAHs behavior in surface water and groundwater of the Yellow River estuary: Evidence from isotopes and hydrochemistry
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DOI：
10.1016/j.chemosphere.2017.03.052
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发表时间：
2017-07-01
期刊：
影响因子：
8.8
通讯作者：
Liu, Qiang
中科院分区：
文献类型：
--
作者：
Li, Jing;Li, Fadong;Liu, Qiang
大型水利工程对华北平原区域地表水-地下水相互作用产生了影响。本研究的目的是评价中国农业区多环芳烃污染水平，确定多环芳烃的来源，分析地表-地下水相互作用对多环芳烃分布的影响，并提出农业区多环芳烃的紧急管理策略。多环芳烃浓度，水化学指标和稳定同位素组成（三角洲O-18和三角洲H-2）测定地表水（SW）和地下水（GW）样品。地表水和地下水中多环芳烃的浓度分别为11.84 ~ 393.12 ng/L和8.51-402.84 ng/L，属于轻度污染。季节变化趋势为：枯水期地表水多环芳烃>枯水期地下水多环芳烃>丰水期地表水多环芳烃>丰水期地下水多环芳烃。大部分地下水样品的水化学和δ O-18值分布在黄河和海水之间。黄河水补给与地下水的混合比平均为65%，少数异常点可达90%以上。地表水与地下水的相互作用影响了研究区多环芳烃的空间分布。鉴于目前的严重污染，迫切需要源头控制的管理方法，改进控制技术，并建立一个监测网络，以警告增加的风险。(C)2017爱思唯尔有限公司版权所有
Large-scale irrigation projects have impacted the regional surface-groundwater interactions in the North China Plain (NCP). Given this concern, the aim of this study is to evaluate levels of PAH pollution, identify the sources of the PAHs, analyze the influence of surface-groundwater interactions on PAH distribution, and propose urgent management strategies for PAHs in China's agricultural areas. PAH concentrations, hydrochemical indicators and stable isotopic compositions (delta O-18 and delta H-2) were determined for surface water (SW) and groundwater (GW) samples. PAHs concentrations in surface water and groundwater varied from 11.84 to 393.12 ng/L and 8.51-402.84 ng/L, respectively, indicating mild pollution. The seasonal variations showed the following trend: PAHs in surface water at the low-water phase > PAHs in groundwater at the low-water phase > PAHs in surface water at the high-water phase > PAHs in groundwater at the high-water phase. Hydrochemical and delta O-18 value of most groundwater samples distributed between the Yellow River and seawater. The mean value of mixture ratio of the Yellow River water recharge to the groundwater was 65%, few anomalous sites can reach to 90%. Surface groundwater interactions influence the spatial distribution of PAHs in the study area. In light of the ongoing serious pollution, management practices for source control, improved control technologies, and the construction of a monitoring network to warn of increased risk are urgently needed. (C) 2017 Elsevier Ltd. All rights reserved.