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Recoveries of As in the various extraction/digestion steps from (i) sediments prior to treatment (ii) amended sediments and magnetic separates from the 2nd set of nitrate-Fe(II) microcosms. The procedure was validated on As(V)-adsorbed magnetite and an As(V)-adsorbed Fe mineral mixture. Magnetite – Mgt, ferrihydrite – Fh, goethite – Gt, and hematite – Hm.
