removal of hexavalent chromium from water. Sulfur dioxide (SO2), sodium bisulfite (NaHSO3), or sodium meta-bisulfite (Na2S2O5) are examples of chemical reducing agents that are frequently used in treatment to convert hexavalent chromium to trivalent chromium. In order to achieve compliance, hexavalent chromium is typically reduced to trivalent chromium through precipitation, yielding chromium hydroxide, a safe and non-toxic material. The primary drawback of this treatment approach is that, in order to ensure a quick reduction rate, the wastewater must be reduced to a pH of two to three. Next, before being released, the wastewater needs to be neutralized. These processes use a lot of chemicals and often result in a lot more sludge from unreacted precipitants.