Analysis about distribution of water fluoride and water arsenic in external environment

Objective To learn the distribution features of water fluoride and water arsenic in external environment in order to provide the evidence for making scientific and effective tactics in prevention and control.Methods Water samples of drinking water well in the arsenism districts were collected.The arsenic content and the fluoride content of drinking water were determined.Results There is a higher arsenic content in the water well of higher fluoride content.Water fluoride content varies with the different contents of water arsenic (F=21.83,P0.01).Water arsenic content tended to increase along with the depth of wells (F=187.53,P0.01), but water fluoride content tended to decrease (F=27.98,P0.01).Conclusion A negative correlation is observed between water fluoride content and water arsenic content in external environment.The wells of lower fluoride and arsenic content are mostly some 50 m in depth.We must,in line with the local conditions,choose safe water source to ensure the realization of preventive countermeasures that the projects of fluoride-lowering and arsenic removal,and improvement of water quality be achievable.