A speciation method for partitioning mononuclear and polynuclear aluminum using ferron

TL;DRAbstract

The kinetic reactions of ferron with unneutralized and partially neutralized Al solutions in the presence of various inorganic and organic anions were investigated with the intent of distinguishing mononuclear and polynuclear Al. Mononuclear Al solutions containing ClO/sub 4//sup -/, Cl/sup -/, NO/sub 3//sup -/, SO/sub 4//sup 2 -/, H/sub 2/PO/sub 4//sup -/, and F/sup -/ with anion to Al molar ratios of 13, 21, 15, 5, 0.75, and 0.08, respectively, expressed similar reactions with ferron which conformed to a single second-order reaction. Mononuclear Al solutions containing malate, glutarate, succinate, salicylate, formate, malonate, and fulvate with ligand/Al molar ratios ranging from 0.4 to 7.5, also reacted rapidly with ferron and were modeled using a single second-order equation. Similarily, mononuclear Al solutions containing citrate, tartarate, and oxalate with ligand/Al molar ratios less than or equal to 0.13, 0.08, and 0.38, respectively, also were modeled using a single second-or

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