Control HN+As HN+ As+ AQDS Fis,3 Fe(IT)(a) and total As (b) concentrations in the culture solution for different treatments with femhydnite is the electron accepTor over the Error bar represent standard errors of three replicates. Wang et al(2009) Effect of microbial pla reduction on arsenic lity in paddy soil. J Environ sci. 1562-1568 3.00400 6.00700800 Fls.4 Results of scanning el icroscopy (a) and energy-dispersive spectroscopy (b) of biogenic iron minerals collected from the medium b ig. 5 X-ray diffraction imvestigation of ferrihydrite(a) and biogenic iron minerals(b).*: peaks of crystalline iron minerals16 Wang et al(2009): Effect of microbial mediated iron plaque reduction on arsenic mobility in paddy soil. J Environ Sci,1562-1568