Arsenic enters the environmental through a various chemical agent use such as herbicides, wood preservatives, as well as mining industry (Chopra,Parmar, 2007). Gold mining is a potential source of arsenic distribution to the environment.
During gold extraction, arsenic as the composition of Arsenopyrite that is naturally occurred together with gold, is separated and diffused into soil and water
(surface and ground water as well as sediment) that possibly contaminate to the environment.
Gold mining at Wangsaphung district, Loei
province of Thailand (the study area) is in the notion for arsenic
distributing source.