中文摘要：

沿海海水入侵区地下水氟中毒屡见不鲜，对比分析氟超标但经吸附处理、氟未超标和氟超标村庄地下水性质发现：经过简单吸附法处理高氟地下水，虽然氟处于正常阚值，但Cl-、NO3-、NO2-、TDS和总硬度等仍严重超标。处理后的地下水与氟中毒村庄地下水Ec、TDS、总硬度、Cl-、Br-、NO3-、NO2-、SO4 2-、Na＋、K＋、Ca2＋、Mg2＋、Sr2＋等指标相当，表明单一吸附法仅使得地下水氟降低，但对其它离子影响较小，吸附法处理的地下水仍存在饮用风险。地球化学指标也表明，氟中毒村庄地下水受海水入侵影响显著，高氟地下水与海水入侵相伴而生。因此，在处理海水入侵区高氟地下水时，应考虑海水入侵与地下水氟富集的关系，发展特殊的综合处理技术。

英文摘要：

Fluorosis is nothing new in coastal seawater intrusion areas. Comparative analysis of groundwater characteristics between high-fluorine groundwater treated by adsorption methods, normal water, and high-fluorinegroundwater, were carried out. It is found that Cl-, NO3-, NO2-, TDS and total hardness are overproof althoughfluorine is within limits due to adsorption treatment. Groundwater properties of Ec, TDS, total hardness, Cl-,Br-, NO3-, NO2-, SO42- , Na ＋, K＋ , Ca2＋ , Mg2＋ and Sr2＋ after treatment are almost equal to those in fluorosisvillage. Such results indicate adsorption methods have no any influence on other ions contents but to decrease fluo- rine contents, and the water is still at risk for drinking. Meanwhile, the groundwater in fluorosis villages is charac-terized by seawater intrusion. Therefore, the relationship between high fluorine and seawater intrusion should be considered when the special comprehensive treatment technologies were developed in coastal areas.