Szukana fraza: [Abstract = "The efficiencies of two coagulants were compared\: aluminium sulphate \(VI\) and polyaluminium chloride \(Flokor 1.2A\). Among the used methods of iron \(II\) oxidisation, the best effects have been achieved by potassium manganate \(VII\) because one of the oxidation products was manganese oxide \(IV\) precipitating from water. Better results in purifying the water were obtained with the use of a prehydrolysed coagulant Flokor 1.2 A than aluminium sulphate \(VI\)."]

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