| 黑河干流中游地区地下水中氟分布特征及成因分析 |
| 摘要点击 235 全文点击 23 投稿时间：2024-05-08 修订日期：2024-07-12 |
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| 中文关键词 氟（F） 地下水 分布特征 水文地球化学过程 富集成因 黑河 |
| 英文关键词 fluoride （F-） groundwater distribution characteristics hydrogeochemical processes enrichment causes Heihe River |
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| 中文摘要 |
| 地下水中过量的氟化物（F-）会对依赖当地地下水的居民身体健康造成危害.为研究黑河干流中游地区高氟地下水分布特征及成因机制,采集浅层地下水（196组）和中深层地下水（9组）样品,综合运用数理统计、Durov图、Gibbs图和离子比值关系等方法,探讨该区地下水中F-的分布特征、来源以及影响因素.结果表明,研究区浅层地下水ρ（F-）为n.d~2.71 mg·L-1,中深层地下水ρ（F-）为n.d~0.69 mg·L-1.地下水中F-浓度呈东北高、西南低的空间分布趋势,且F-浓度随深度增加而降低.区域浅层高氟地下水水化学类型以SO4·HCO3-Na·Mg型为主,主要分布在合黎山山前平原地下水排泄区.水文地质环境和含水层岩性是影响黑河干流中游地区浅层高氟地下水的主要因素,山区富氟矿物是地下水中F-的物源.碱性的地下水环境、阳离子交替吸附和蒸发作用进一步促进地下水中F-的富集.研究旨在阐明区域地下水氟化物来源、识别地下水F-富集的水文地球化学过程及影响因素,这对于保障干旱地区水资源的可持续发展至关重要. |
| 英文摘要 |
| Excess fluoride （F-） in groundwater can be harmful to the health of local residents who depend on it. To study the distribution characteristics and genetic mechanism of high fluoride groundwater in the middle reaches of the main stream of Heihe River, 196 sets of shallow groundwater samples and 9 sets of middle and deep groundwater were collected. Mathematical statistics, Durov diagram, Gibbs diagram, and ion ratio relationship were comprehensively used to explore the distribution characteristics, sources, and influencing factors of fluoride in the groundwater. The results showed that ρ（F-） of shallow groundwater in the study area ranged from n.d to 2.71 mg·L-1, and ρ（F-） in the middle and deep groundwater ranged from n.d to 0.69 mg·L-1. The spatial distribution trend of F- concentration in groundwater was high in the northeast and low in the southwest and the F- concentration decreased with increasing depth. The main chemical type of the regional shallow high fluoride groundwater was SO4·HCO3-Na·Mg, which was mainly distributed in the groundwater discharge area of the piedmont plain of Heli Mountain. Hydrogeological environment and aquifer lithology were the main factors affecting the shallow high fluoride groundwater in the middle reaches of the Heihe River. Fluoride-rich minerals in mountainous areas were the source of F- in groundwater. The alkaline groundwater environment, cation exchange adsorption, and evaporation further promoted the enrichment of F-. This study aims to clarify the source of fluoride in regional groundwater and identify the hydrogeochemical processes and influencing factors of F- enrichment in groundwater, which is essential to ensure the sustainable development of water resources in arid areas. |
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