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Role of Manganese in the Oxidation of Arsenite by Freshwater Lake Sediments1
1981
Clays and clay minerals
The importance of various sediment components in the oxidation of As(III) (arsenite) to As(V) (arsenate) by freshwater lake sediments in southern Saskatchewan was examined. Treating the sediments with hydroxylamine hydrochloride or sodium acetate to remove Mn greatly decreased the oxidation of As(III). Furthermore, synthetic Mn(IV) oxide was a very effective oxidant with respect to As(liD: 216 t~g As(V)/ml was formed in solution when 1000 txg As(III)/ml was added to suspensions of 0.1 g of the
doi:10.1346/ccmn.1981.0290308
fatcat:tdqtvmqhorahnlpvqixcj2zdcq