Soluble Mn contamination in drinking water systems is a well-known problem that can lead to severe water discoloration and consumer complaints. X-ray photoelectron spectroscopy (XPS) and solution chemistry analyses were performed to investigate soluble Mn(II) removal by MnOx(s)-coated media under experimental conditions relevant to drinking water treatment plants in the absence and presence of chlorine. While Mn(II) removal in the absence of chlorine was mainly due to adsorption, the detection of Mn(III) by XPS analyses of MnOx(s)-coated media suggests that surface Mn-catalyzed oxidation occurred. Mn(IV) was predominant in all the XPS analyses of the MnOx(s)-coated media recovered from experiments performed in the presence of chlorine, suggesting that initial adsorption followed by subsequent rapid surface-catalyzed oxidation was the mechanism for Mn(II) removal. These results confirm that combining the application of chlorine with the catalytic action of MnOx(s) oxides is effective for soluble Mn(II) removal from drinking water.

X-ray photoelectron spectroscopy investigation of soluble manganese removal by MnO<sub>x</sub>(s)-coated media

244th National Meeting (2012)

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X-ray photoelectron spectroscopy investigation of soluble manganese removal by MnOx(s)-coated media

X-ray photoelectron spectroscopy investigation of soluble manganese removal by MnO_x(s)-coated media