V. Nenov et al., AS(III) REMOVAL FROM AQUEOUS-SOLUTIONS USING NONSTOICHIOMETRIC COPRECIPITATION WITH IRON(III) SULFATE AND FILTRATION OR FLOTATION, Environmental pollution, 83(3), 1994, pp. 283-289
A study of As(III) removal from aqueous solutions was carried out, usi
ng iron(III) sulphate as a coprecipitation agent. When the initial As(
III) concentration was 3775 mgl(-1), maximum As(III) removal was achie
ved at pH 9 and with a molar ratio of Fe(III)/As(III) equal to 11. Und
er these conditions the formed precipitates showed highest stability,
relative to the fixation of As(III). Flotation which can be applied as
a subsequent solid/liquid separation method, was found to be particul
arly effective for solutions containing low As(III) concentrations (le
ss than or equal to 10 mg(-1)).