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Research Journal of Environmental Toxicology
Year: 2007  |  Volume: 1  |  Issue: 4  |  Page No.: 198 - 203

Composition of Aliphatic Hydrocarbons in Tunisian Textile Sludge and Produced Composts as a Function of Sludge Ratio

Mohamed Anis El Hammadi, Melika Trabelsi and Belgacem Hanchi    

Abstract: Aliphatic hydrocarbons are one of the most widespread contaminants in the textile wastes. In the present study, technology of windrow composting was used in order to explore a bioremediation process of these contaminants for a textile sludge restoration in Tunisia. Initially, greenwaste were added in two different proportions to the sludge received from a textile-wastewater treatment plant in the north of Tunisia, mixed thoroughly and the composting process was carried on for 3 months. The thermogenic phase improved the hygiene of the two final products. Samples of sludge and the final composts were extracted with hexane (100%), the extracts were purified on a silica gel and concentrated with evaporation. The gas chromatography analysis of the sludge sample showed the presence of a mixture of aliphatic hydrocarbons, ranging from C18 to C30. The total hydrocarbon content in the sludge was 81 mg kg-1 dry weight, decreased in the 2 final composts and was lower than 27 mg kg-1 dry weight in C1 and C2, respectively. The results revealed a decrease of sludge aliphatic hydrocarbon content after composting. The integration of other analytical and toxicological data is necessary to properly assess the bioremediation efficiency of the sludge composting process.

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