College of Geosciences and Engineering, North China University of Water Resources and Electric Power, Zhengzhou, 450046, China.
Collaborative Innovation Center for Efficient Utilization of Water Resources, Zhengzhou, 450046, China.
Environ Sci Pollut Res Int. 2023 May;30(23):63549-63564. doi: 10.1007/s11356-023-26765-0. Epub 2023 Apr 13.
The Yudong Plain is in the eastern part of Henan Province, China, where there is little rain and high evaporation. Compared to other areas in Henan Province, the groundwater fluorine content is generally high, which affects the health of residents. Based on the systematic analysis of water chemistry data of shallow and mid-depth groundwater samples in the Yudong Plain, the causes of shallow and mid-depth high-fluorine groundwater in the Yudong Plain were explored using mathematical statistics, spatial interpolation, and ion ratios. The results show that the fluorine contents of both shallow and mid-depth groundwater in the study area are high. The shallow samples had fluorine contents ranging from 0.1 to 4.89 mg/L, with an exceedance rate of 48% and an average content of 1.15 mg/L. The fluorine content of mid-depth samples ranged from 0.14 to 3.32 mg/L, with an exceedance rate of 68% and an average content of 1.33 mg/L. The shallow high-fluorine groundwater is mainly distributed in the central low-lying area, and its main hydrochemical type is HCO-Na·Mg; the mid-depth high-fluorine groundwater is mainly distributed in strips in the north and east of the study area, and its main water chemistry type is HCO-Na. Fluorine enrichment in shallow groundwater in the study area is controlled by rock weathering, evaporation concentration, and competitive adsorption, while leaching and dissolution of fluorine-containing minerals in sedimentary strata are the main factors influencing fluorine enrichment in mid-depth groundwater. The results of the human health risk assessment (HRA) showed that the mean non-carcinogenic hazard quotients (HQs) in shallow groundwater were 0.95, 0.64, 0.57, and 0.55 for infants, children, teenagers, and adults, respectively, while the mean non-carcinogenic HQs in mid-depth groundwater were 1.11, 0.74, 0.66, and 0.63, respectively. The study provides a scientific basis for the rational development and use of groundwater in the area and offers theoretical support for the prevention and control of groundwater pollution.
豫东平原位于中国河南省东部，这里降雨稀少，蒸发量大。与河南省其他地区相比，该地区地下水的氟含量普遍较高，这影响了居民的健康。本研究基于豫东平原浅层和中深层地下水水样的水化学数据系统分析，采用数理统计、空间插值和离子比值等方法，探讨了豫东平原浅层和中深层高氟地下水的成因。结果表明，研究区浅层和中深层地下水的氟含量均较高。浅层水样的氟含量范围为 0.1-4.89mg/L，超标率为 48%，平均值为 1.15mg/L。中深层水样的氟含量范围为 0.14-3.32mg/L，超标率为 68%，平均值为 1.33mg/L。浅层高氟地下水主要分布在中部低地，其主要水化学类型为 HCO-Na·Mg；中深层高氟地下水主要分布在研究区北部和东部的条带状区域，其主要水化学类型为 HCO-Na。研究区浅层地下水氟的富集主要受岩石风化、蒸发浓缩和竞争吸附的控制，而沉积地层中含氟矿物的淋滤和溶解则是中深层地下水氟富集的主要因素。人体健康风险评估（HRA）结果表明，浅层地下水对婴幼儿、儿童、青少年和成人的非致癌危害商（HQ）均值分别为 0.95、0.64、0.57 和 0.55，而中深层地下水的非致癌 HQ 均值分别为 1.11、0.74、0.66 和 0.63。本研究为该地区地下水的合理开发利用提供了科学依据，为地下水污染防治提供了理论支撑。
