Arsenic enters the environmental through a va
rious 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 occu
rred together with gold, is separat
ed 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.