The Survey of Arsenic and Fluoride Levels in Coal from Coal Mines in South of Shaanxi / 环境与健康杂志

ABSTRACT

Objective Identify the arsenic and fluorin contents in coal from major producing coal mines in south of Shaanxi,providing a scientific foundation for the formulation of the prevention strategy.Methods In the 6 major coal mine areas governed by Ankang and Hanzhong city,the 62 mines with comparatively large production scales and sales locally,which may have some effective forces on the causing of the local arsenic and fluorin poisoning,were inveatigated,on-the-spot sampling are carried out,the fluorine in coal was determined by the combustion-hydrolysis/fluoride-ion selective electrode method and the arsenic in coal was determined by the atomic fluorescence.Results The maximum of the fluoride content in coal from the 62 investigated coal mines was 3 053.04 mg/kg,and the minimum was 6.58 mg/kg;the arithmetic mean was 1 034.30 mg/kg;the geometric mean was 656.85 mg/kg;The maximum of arsenic content in coal was 484.71mg/kg,and the minimum was 29.64 mg/kg;the arithmetic mean was 197.64 mg/kg,the geometric mean was 174.29 mg/kg.Conclusion The contents of fluoride and arsenic are seriously exceeded the standard limits in the 62 investigated coal mines,especially in stone coal mines.