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Article Dans Une Revue Archives of Environmental Protection Année : 2008

Impact of activated sludge flocs properties after sonication in relation with heavy metal uptake

Résumé

The effects of activated sludge sonication on floes surface properties and heavy metal uptake was investigated. Negative surface charge and specific surface area were estimated by correlation with dye adsorption whereas relative hydrophobicity was measured by adhesion to hexadecane. Experimental results show that ultrasound treatment leads to a simultaneous increase of specific surface area and availability of negatives and/or hydrophilic sites. Thus, fixation sites for heavy metal uptake are made free by sonication. Both increase of specific surface area and fixation sites availability leads to an increase of uptake of Cd(II). For Cu(II), organic matter released in soluble phase during the treatment acts as a ligand and limits adsorption on floes surface. ©Copyright by Institute of Environmental Engineering of the Polish Academy of Science, Zabrze, Poland 2008.
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Dates et versions

hal-00517119 , version 1 (13-09-2010)

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  • HAL Id : hal-00517119 , version 1

Citer

Julien Laurent, Magali Casellas, Christophe Dagot. Impact of activated sludge flocs properties after sonication in relation with heavy metal uptake. Archives of Environmental Protection, 2008, 34 (3), pp.229-238. ⟨hal-00517119⟩
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