Iron Oxide Coated Sand for Arsenic Removal: Investigation of Coating Parameters Using Factorial Design Approach

Abstract

Iron oxide-coated sand filtration is reported as one of the most viable technological options for arsenic removal from drinking water by the United States Environmental Protection Agency. For substantial utilization of the adsorption properties of iron oxide-coated sand for arsenic removal, it is important to understand the factors contributing to its adsorption capabilities. The effects of seven factors i.e., coating pH, temperature, iron concentration, number of coatings, aging, pH of the solution and mass of the adsorbent on arsenic (V) and arsenic (III) removal were investigated. Two sets of