Abstract
Fluorosis and seawater intrusion are very typical along coastal area in Laizhou Bay and other places of China. The groundwater characteristics change due to seawater intrusion, which results in the increase of Na+, HCO3−, pH, TDS, hardness, conductivity and the decrease of Ca2+. Meanwhile, high fluorine in groundwater is related to soft and alkaline conditions, which are depleted in Ca2+ and enriched in Na+. Such conditions result in more fluorine release from rocks or soils, thus the fluorosis along coastal zones is related to seawater intrusion. The fluorosis and seawater intrusion along the coastal zones in Laizhou Bay and other places of China are analyzed in detail, which is useful for further understanding of fluorosis along coastal zones. Graphical Abstract
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