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Research Journal of Environmental Sciences
Year: 2007  |  Volume: 1  |  Issue: 3  |  Page No.: 122 - 126

Analysis and Comparison of Toxicants Between Tunisian Activated Sludge and Produced Compost

Mohamed Anis El Hammadi, Melika Trabelsi, Amel Jrad and Belgacem Hanchi    

Abstract: In the research reported here, heavy metals and polycyclic aromatic hydrocarbons (PAH) were analyzed in selected Tunisian activated Sludge and the produced compost. The GC-MS study demonstrates that not PAH were detected in the activated sludge and the final compost contain only natural PAH compounds. Major differences were observed between the sludge and the mature compost studied as regards their total heavy metal contents. An increase in total Fe and Mn ions was observed in the produced compost Addition of green waste as co-compost to activated sludge caused a significant reduction of total Cd and Cu contents in the compost due to dilution effect and the sludge led to greater content of total heavy metal concentrations. The total metal contents in the final compost were much lower than the French limit values of composts to be used as soil fertilizer. Both GC-MS study and the total heavy metal analysis provided valuable information concerning amount of toxicants in the compost and the sludge.

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