Arsenic removal from contaminated soil by simultaneous use of a dissimilatory arsenate-reducing bacterium and naturally occurring mediators.

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We investigated a novel bioremediation strategy for arsenic-contaminated soil via microbial arsenic mobilization. The results indicate that solid phase arsenate reduction by a dissimilatory arsenate-reducing bacterium is vital for effective arsenic removal from solid phase. Also, vitamin B_2 could significantly enhance arsenic mobilization as a redox active mediator, suggesting that simultaneous use of dissimilatory arsenate-reducing bacteria and vitamin B_2 can be an effective strategy for remediation of arsenic-contaminated soil.