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  • Title: Impact of sewage sludge conditioning and dewatering on the fate of nonylphenol in sludge-amended soils.
    Author: Kouloumbos VN, Schäffer A, Corvini PF.
    Journal: Water Res; 2008 Aug; 42(14):3941-51. PubMed ID: 18694585.
    Abstract:
    The fate of (14)C-labelled p353-nonylphenol (NP) in soils amended with differently treated sludges originating from the same precursor sludge was assessed. The effects of commonly applied conditioning and dewatering techniques were investigated. Nonylphenol was degraded considerably faster in soils amended with liquid sludge, while a significant portion of it remained intact and extractable by organic solvents when sludge had been centrifuged before soil amendment. Mineralization was reduced or even inhibited when freeze-thaw or lime conditioning was applied, respectively. Flocculation by an acrylamide-based cationic polymer led to the formation of a nitro-addition product of nonylphenol in soil, as well to decreased mineralization rates after prolonged incubation times. Possible mechanisms underlying the observations are suggested and discussed.
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