Occurrence and Health Implication of Fluoride in Groundwater of Loess Aquifer in the Chinese Loess Plateau: A Case Study of Tongchuan, Northwest China
Occurrence and Health Implication of Fluoride in Groundwater of Loess Aquifer in the Chinese Loess Plateau: A Case Study of Tongchuan, Northwest China
复制标题
DOI：
10.1007/s12403-018-0278-x
复制
发表时间：
2019-06-01
影响因子：
6.7
通讯作者：
Xiang, Gang
中科院分区：
文献类型：
--
作者：
Li, Peiyue;He, Xiaodong;Xiang, Gang
本文研究了黄土区地下水氟的赋存状态和空间分布，并探讨了影响地下水氟含量的地球化学和人为因素。通过与国家和世界卫生组织饮用水指南进行比较，对饮用水水质进行了评估，并使用美国环保局推荐的健康风险评估模型量化了氟化物对人体健康的影响。结果表明，研究区地下水属弱碱性，水质总体较好，但局部地区TDS、TH、Na+、F-、NO3-略超标。高氟地下水主要分布在研究区的东南部，这与该区地下水的流向相一致。地下水氟主要来源于天然氟，受pH值、特定水化学环境、离子交换、矿物饱和状态等自然因素的控制。在本研究中，氟化物对总健康风险的贡献最大。在这个地区，儿童的健康风险比成人高。建议建立集中式供水系统和雨水集蓄系统，以保证该地区的安全饮用水供应。
This study was carried out to delineate the occurrence and spatial distribution of groundwater fluoride in a loess area of China and to determine the geochemical and anthropogenic factors that influence its concentration. Water quality was assessed for drinking purpose by comparing with the national and WHO drinking water guidelines, and the impacts of fluoride on human health were also quantified using the health risk assessment model recommended by the USEPA. The results demonstrate that groundwater in the study area is slightly alkaline in nature, and its quality is generally good except slightly excessive TDS, TH, Na+, F-, and nitrate at some local locations. High-fluoride groundwater is mainly distributed in the southeast part of the study area, which is in accordance with the groundwater flow direction in this area. Groundwater fluoride is mainly of natural origin and is dominantly controlled by natural factors such as pH, specific hydrochemical environment, ion exchange, and saturation state of minerals. Fluoride contributes the most to the total health risk in the present study. Children are at higher health risk than adults in this area. Establishing central water supply system and rainwater harvesting system are suggested to guarantee safe drinking water supply in this area.