Highly villous iron oxyhydrosulfate was biosynthesized by A. ferrooxidans.
pH significantly affected the Cu(II) and Cr(VI) adsorption process.
Ferrous oxidation ability of bacteria influenced material adsorption capacity.
Coagulation was determined by PSA/Sh ration, pH of PSA and the dosage.
The material possessed coagulation and heavy metal adsorption ability.