... is also possible to realize that the longer the portion of AC-Fe, the higher the adsorbent cost. Therefore, optimizing the AC-Fe portion in the column is one of the key factors for a feasible arsenic ... solute (arsenic anions) in the bed is decreased resulting to shorter contact between the feed and the adsorbent. In addition, the higher the flow rate, the smaller the film resistance, implying ... while the surface of the original AC seems to be clean (Figure 1a on left side), there are some patches of iron particles stuck on the surface of AC-Fe (Figure 1b on right side). These may be the...