Arsenic is a poisonous heavy metal that seriously threat human healthy widely distributed in water and soil environment. The speciation of arsenic is crucial for its environmental behavior and biologic availability. Deep understanding in soil arsenic speciation helps further searching the migration， transformation and redistribution of arsenic and providing means for rational soil remediation. The process of sulfate microbial reduction has significant effect on speciation change and interface behavior of arsenic. However, knowledge in the arsenic speciation and redistribution in such complex system is still scarce.
The work was supported by NNSFC (41273333, 41531043, 41173119). The results were published in Journal of Hazardous Materials（2016, 301: 538–546, DOI: 10.1016/j.jhazmat.2015.09.030）entitled as Speciation change and redistribution of arsenic in soil under anaerobic microbial activities