Advances in migration and transformation of thiolated arsenic and its health risks in soil-water environment and plant system
Thiolated arsenic is a new type of arsenic compounds in which=O,—OH or—CH3 are replaced by=S or—SH in the structure of arsenic material.It has been found to be ubiquitous in flooded sulfur-containing soils,threatening soil health and food safety.With the advancement of analytical methods,new progress has been made in the study of the distribution and environmental behaviors of thiolated arsenic in soil-water environment and plant system.This paper reviewed the related research progress in recent years from the following four aspects:1)chemical species and analytical methods of thiolated arsenic;2)biogeochemical behaviors of thiolated arsenic in soil-water environment;3)migration,transformation,and accumulation of thiolated arsenic in soil-water environment and plant system;4)accumulation and health risks of thiolated arsenic m rice grains.This review emphasized the changes in the species and content of thiolated arsenic during environmental processes.Furthermore,the development trend of thiolated arsenic was prospected.
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