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https://doi.org/10.37358/Rev.Chim.1949

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Revista de Chimie (Rev. Chim.), Year 2011, Volume 62, Issue 5,





ILIE PISOI
Coagulation of Surface Water using Simple and Prehydrolyzed Aluminium Salts

Abstract:

This study investigated comparatively the performances of the coagulation stage of the drinking water treatment using Danube river water source, performed with two types of coagulation agents, a simple aluminium salt (alum) and a prepolymerized compound, alkaline aluminium polychloride (PACl). Jar-tests demonstrated that PACl as coagulation agent provided the best turbidity and natural organic matter (NOM) removal efficiency in comparison with alum usage. Under high turbidity conditions, the coagulation application using alum did not lead to the treated water quality that fit the standard requirements. A very high dissolved aluminium residual concentration was noticed when the coagulation was performed with alum, especial at low temperature. Also, it was found that PACl was less sensitive to low temperatures than alum in regard to both turbidity removal and the dissolved aluminium residual concentration. Keywords: coagulation stage, drinking water treatment, coagulation agents, aluminium salt, alkaline aluminium polychloride


Issue: 2011, Volume 62, Issue 5
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