Fluoride-bearing groundwater in Gummanampadu Sub-basin, Guntur District, Andhra Pradesh, India

摘要: The functional factors responsible for fluoride (F−)-bearing groundwater used drinking as well cooking in the area of Gummanampadu Sub-basin, Guntur District, Andhra Pradesh, India are discussed. study is a part an Archean Gneissic Complex, consisting banded-biotite-hornblende-gneisses, over which Proterozoic Cumbhum quartzites, shales, phyllites, and dolomitic limestones occur. chemistry dominated by carbonates (HCO3− CO32−) at higher pH. This results total alkalinity hardness, causing excess alkalinity. Sodium ion among cations (Ca2+, Mg2+, K+). concentration F− (2.1–3.7 mg/L) than that desirable national limit (1.2 prescribed purpose. A significant positive correlation exists between pH HCO3− + CO32−. indicates alkaline condition prime conducive factor dissolving F−-bearing minerals more effectively leading to groundwater. Furthermore, chloro-alkaline index reflects exchange, oversaturation with respect CaCO3 evaporation. In addition, negative relation depth shows effect solubility and/or leaching salts different levels. These regulate On other hand, SO42− K+ human land use activities (namely, chemical fertilizers, disposal domestic wastes, etc.), add number residents suffer from health disorders related fluorosis, consequence water. Thus, this emphasizes need supply safe water, nutritional diet, rainwater-harvesting structures, public education realize “health all” motto World Health Organization.