Chloramphenicol sodiumsuccinate(CAP,C15H15Cl2N2 Na2O8) isabroad-spectrumantibioticexhibiting activity againstbothGram-positiveandGram-negativebacteriaaswellasothergroupsofmicro- organisms onlypartiallyremovedbyconventionalactivatedsludgewastewatertreatmentplants.Thus, CAP anditsmetabolitescanbefoundineffluents. Thepresentworkdealswiththephotocatalyticde- gradation ofCAPusingTiO2 as photocatalyst.Weinvestigatedtheoptimizationofreactioncontacttime and concentrationofTiO2 considering CAPanditsby-productsremovalaswellaseffluent ecotoxicity elimination. ConsideringaCAPrealconcentrationof25mgL1, kineticdegradationcurveswerede- termined at0.1,0.2,0.4,0.8,1.6and3.2gL1 TiO2 after5,10,30,60and120minreactiontime.Treated samples werecheckedforthepresenceofby-productsandresidualtoxicity(V. fischeri, P.subcapitata, L. sativum and D. magna). ResultsevidencedthatthebestcombinationforCAPanditsby-productsremoval could besetat1.6gL1 of TiO2 for 120minwithanaverageresidualtoxicityofapproximately10%,that is thethresholdsetfornegativecontrolsinmosttoxicitytestsforblankandgeneraltoxicitytestac- ceptability.
Photocatalytic degradation of the antibiotic chloramphenicol and effluent toxi-city effects
LOFRANO, GIUSY;IANNECE, Patrizia;CAROTENUTO, Maurizio
2016
Abstract
Chloramphenicol sodiumsuccinate(CAP,C15H15Cl2N2 Na2O8) isabroad-spectrumantibioticexhibiting activity againstbothGram-positiveandGram-negativebacteriaaswellasothergroupsofmicro- organisms onlypartiallyremovedbyconventionalactivatedsludgewastewatertreatmentplants.Thus, CAP anditsmetabolitescanbefoundineffluents. Thepresentworkdealswiththephotocatalyticde- gradation ofCAPusingTiO2 as photocatalyst.Weinvestigatedtheoptimizationofreactioncontacttime and concentrationofTiO2 considering CAPanditsby-productsremovalaswellaseffluent ecotoxicity elimination. ConsideringaCAPrealconcentrationof25mgL1, kineticdegradationcurveswerede- termined at0.1,0.2,0.4,0.8,1.6and3.2gL1 TiO2 after5,10,30,60and120minreactiontime.Treated samples werecheckedforthepresenceofby-productsandresidualtoxicity(V. fischeri, P.subcapitata, L. sativum and D. magna). ResultsevidencedthatthebestcombinationforCAPanditsby-productsremoval could besetat1.6gL1 of TiO2 for 120minwithanaverageresidualtoxicityofapproximately10%,that is thethresholdsetfornegativecontrolsinmosttoxicitytestsforblankandgeneraltoxicitytestac- ceptability.| File | Dimensione | Formato | |
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