在纺织废水中脱色细菌的影响外文翻译

本科生毕业设计本科生毕业设计外文翻译外文翻译BacterialInfluenceonTextileWastewaterDecolorizationAamrAlalewi,CuilingJiang1DepartmentofHydrologyandWaterResources,HohaiUniversity,Nanjing,China;2StateKeyLaboratoryofHydrology-WaterResourcesandHydraulicEngineering,HohaiUniversity,Nanjing,China.Email:aamralewi@hotmail.comReceivedMay12th,2012;revisedJune15th,2012;acceptedJuly17th,2012ABSTRACTThestudyaimstoisolateandoptimizebacterialstrainshavingtheabilitytodegradeanddecolorizeazodyesproducedinthefinaleffluentoftextiledyingindustries.Inthisregard,tenbacterialstrainswereisolatedfromwastewatertreat-mentplants,andmostofthemweresubjectedtothecoloredeffluentsresultingfromdilapidatedhouses.Theabilityofthesebacterialisolationstouseawiderangeofazodyestodeterminethesolecarbonsourcewasdetermined.Keywords:Decolorization;Biodegradation;AzoDys;TextileWastewater1.IntroductionEnvironmentalpollutionhasbeenidentifiedasamajorprobleminthemodernworld.Theincreasingdemandfordrinkablewater,anditsdwindlingsupply,hasmadethetreatmentandreuseofindustrialeffluentsanattractiveoption.Oneofthemostimportantenvironmentalpollu-tionproblemsisthecolorinwatercourses;althoughsomeofthesecolorsarenormallypresentandof―natu-ral‖origins(e.g.thecolororiginatesfromtheactivityofmicroorganismsinponds),aconsiderableproportion,especiallyinthelowerreachesofriversthatdrainlargeindustrialconurbations,originatesfromindustrialefflu-ents.Somecoloredeffluentsareassociatedwiththepro-ductionanduseofdyes.Azodyes,thelargestchemicalclassofdyeswiththegreatesvarietyofcolors,havebeenusedextensivelyfortextile,dyeing,andpaperpainting[1].Thesedyescannotbeeasilydegraded,andsomearetoxictohigheranimals.Azodyesconsistofadiazotizedaminecoupledwithanamineorphenol,andcontainoneormoreazolinkages.Atleast300differentvarietiesofazodyesareexten-sivelyusedinthetextile,paper,food,cosmeticsandpharmaceuticalindustries.TheeffectsofpH,temperature,typeandconcentrationofrespirationsubstrates,andoxygentensionontherateofbiologicalreductionofavarietyofazodyeshavepreviouslybeeninvestiga