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Advances in coagulation/flocculation field: Al- and Fe-based composite coagulation reagents

Currently, the research in the field of coagulation/flocculation process is focused on the synthesis of new composite coagulants, which are constituted of inorganic and organic constituents, hence able to utilize within one reagent the advantages of both inorganic and organic components. Among the possible organic additives, an anionic polymer can be used, by introducing it into a pre-polymerised metal coagulant, based either on Al or on Fe.

In this study, a co-polymer of acrylamide and sodium acrylate is combined with two widely used Al or Fe based coagulants, i.e. Polyaluminium Chloride (PACl), and Polyferric Sulphate (PFS), thus producing novel composite coagulation reagents. The coagulants were characterised in terms of typical physico-chemical properties, such as the degree of polymerisation, pH, conductivity and turbidity. Finally, coagulation experiments (jar-tests) enable the comparable assessment/evaluation of coagulants efficiency, when treating model kaolin-humic acid suspensions, or pre-treated tannery wastewater.

Copyright:	© Aristotle University of Thessaloniki
Quelle:	2nd International Conference 2009 (Juni 2009)
Seiten:	7
Preis:	€ 5,00
Autor:	P.A. Moussas Dr. in Chemistry N.D. Tzoupanos A.I. Zouboulis
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