Human impacts on groundwater flow and contamination deduced by multiple isotopes in Seoul City, South Korea
Human impacts on groundwater flow and contamination deduced by multiple isotopes in Seoul City, South Korea
复制标题
DOI：
10.1016/j.scitotenv.2008.04.014
复制
发表时间：
2009-04-15
影响因子：
9.8
通讯作者：
Taniguchi, Makoto
中科院分区：
文献类型：
--
作者：
Hosono, Takahiro;Ikawa, Reo;Taniguchi, Makoto
在亚洲最大的城市之一韩国首尔市，使用同位素组合（δ D、T、δ N-15、δ O-18、δ S-34 和 Sr-87/Sr-86）调查了人类活动对水流系统和地下水污染的影响。将在城市大范围内采集的十八个代表性地下水和河水样本与之前报告的数据进行了比较。稳定同位素（δ D 和 δ O-18）的分布与地下水潜力数据显示，来自周围山区以及汉江和其他地表溪流的地下水补给排向城市中北部，那里有一个地铁隧道泵站。从 T 值（3.3 至 5.8 T.U.）表明地下水在过去 30 至 40 年间得到了补给。 SO24- 和 NO3- 数据的 delta S-34 和 delta N-15 被有效地用作人类活动污染的指标。这些同位素阐明，人为污染物（即工业和家庭废水、垃圾填埋场和化肥）的贡献是地下水中 SO42-（>30 ppm 作为 SO42-）和 NO3-（>20 ppm 作为 NO3-）富集的原因。地下水的Sr-87/Sr-86值根据不同成因的围岩而变化（0.71326至0.75058）。钙等矿物元素也被认为是从岩石中天然提取的。首尔市地下水受到地铁隧道抽水控制的地下水流输送污染物的严重影响，导致城市化地区水质恶化。 (C) 2008 Elsevier B.V. 保留所有权利。
The influence of human activities on the flow system and contamination of groundwater were investigated in Seoul City, South Korea, one of the largest Asian cities, using a combination of isotopes (delta D, T, delta N-15, delta O-18, delta S-34, and Sr-87/Sr-86). Eighteen representative groundwater and river water samples, which were collected over a wide area of the city, were compared with previously reported data. The distribution of stable isotopes (delta D and delta O-18) with groundwater potential data shows that recharged groundwater from either the surrounding mountainous area as well as the Han River and other surface streams discharged towards the northern-central part of the city, where a subway tunnel pumping station is located. It is suggested from T values (3.3 to 5.8 T.U.) that groundwater was recharged in the last 30 to 40 years. The delta S-34 and delta N-15 of SO24- and NO3- data were efficiently used as indicators of contamination by human activities. These isotopes clarified that the contribution of anthropogenic contaminants i.e., industrial and household effluents, waste landfills, and fertilizers, are responsible for the enrichment by SO42- (>30 ppm as SO42-) and NO3- (>20 ppm as NO3-) of groundwater. The Sr-87/Sr-86 values of groundwater vary (0.71326 to 0.75058) in accordance with the host rocks of different origins. Mineral elements such as Ca are also suggested to be derived naturally from rocks. The groundwater under Seoul City is greatly affected by transportation of pollutants along the groundwater flow controlled by subway tunnel pumping, contributing to the degradation of water quality in urbanized areas. (C) 2008 Elsevier B.V. All rights reserved.