We isolated three anaerobic As(Ⅴ)-reducing bacterium from soil with high ratio of As(Ⅲ).
Strains JQ, DJ-3 and DJ-4 could transform very high concentration of As(Ⅴ) to As(Ⅲ).
All the three strains could release goethite-adsorbed As(Ⅴ) into solution.
We compared the three strains with other previously isolated strains.
The existence of the strains will cause the mobilization and transformation of As in soil.