... chronic arsenicism in PR China (Xia and Liu, 2004) state that, up to now, chronic arsenicism via drinking-water is found in Taiwan, Xinjiang, Inner Mongolia, Shanxi, Ningxia, Jilin, Qinghai, Received ... reduced in the bioleaching process, re-oxidized to insoluble ferric form due to the intrusion of supernatant aerobic water into the sand-filter bed and was trapped by the mechanical straining mechanism, ... negatively impacted in response to organic matter inclusion in the feed water. In comparison to the humic acid, the simulated wastewater organic matter was found to be more unfavorable to the arsenic...