Simultaneous arsenate and sulfate reduction in sediment-packed columns to evaluate arsenic removal efficiency and stability of biogenic minerals
An arsenic-contaminated sediment was used as a source of microorganisms in two fixed-bed column reactors operated under arsenate and sulfate reduction to assess arsenic removal efficiency and the arsenic leaching potential of the biominerals produced, which were already incorporated into the sediment bed. Moreover, at the end of reactor operation, the microbial community composition was analyzed and compared with that of the native sediment community.