The fate of heavy metals during thermal and ultrasound treatment of activated sludge

• Autorzy: Laurent J. , Pierra M. , Casellas M. , Dagot C.
• Języki publikacji: EN

Abstrakty

EN

The fate of cadmium and copper during thermal and ultrasound treatments of activated sludge was studied in terms of mixed liquor physicochemical modifications. Biochemical composition of sludge testfied to the solubilization of its biopolymers. Granulometric measurements demonstrated that ultrasound and temperature induced respectively floc disintegration and macrofloc deflocculation. The uptake of the two metals by sludge flocs was improved with an increase in temperature. Both metals were in a different way adsorbed by sludge flocs, since mass transfer improvement together with the extended surface area offered by sonicated flocs increased the cadmium adsorption. At the same time, an increase in soluble organic ligands limited copper uptake.

Słowa kluczowe

EN

activated sludge; ultrasonics; cadmium adsorption; wastewater treatment; sludge ultrasonic treatment

PL

osad czynny; ultradźwięki; adsorpcja kadmu; oczyszczanie ścieków; nadźwiękawianie osadu

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Environment Protection Engineering
• Rocznik: 2009
• Tom: Vol. 35, nr 3
• Strony: 5--15
• Opis fizyczny: bibliogr. 19 poz.

Twórcy

autor

Laurent J.

autor

Pierra M.

autor

Casellas M.

autor

Dagot C.

• Groupe de Recherche Eau Sol Environnement, Université de Limoges, Parc ESTER Technopôle, 16 rue Atlantis, 87068 Limoges Cedex, France,

Bibliografia

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