Organic Arsenic in the Soil Environment: Speciation, Occurrence, Transformation, and Adsorption Behavior

An attempt is made to describe the fate and behavior of organic arsenic (As) compounds in the soil environment, based on an extensive literature researches. The objective of this review is to provide an overview on the state of knowledge to date about the occurrence and potential transformation of organic As, including methylation, degradation, and hydration, in soils and their uptake and accumulation in plants and animals. Accordingly, the biogeochemical cycle of organic As in the soil environment is proposed.