The occurrence and geochemistry of fluoride in some natural waters of Kenya

摘要: Abstract In recent years the acquisition of considerable additional data on hydrogeochemical behaviour fluoride in natural waters Kenya has been made possible by extensive surface-water and groundwater sampling campaigns as well improvements analytical techniques. Ultimately, principal source relates to emissions from volcanic activity associated with East African Rift System. Through various intermediate steps, but also directly, passes into water system components food chain. Ingestion man is mainly through drinking other beverages. River generally have a concentration lower than recommended level (1.3 ppm) for potable water, thus promoting susceptibility dental caries. Groundwaters lake show considerably higher contents, resulting widespread incidence fluorosis areas where major fish regular component diet. This paper presents synthesis so far obtained sources distribution hydrological Kenya, examines extent fluorine toxicity puts forward recommendations combat or minimise problem.