ASTM D6691-2009 利用确定的微生物聚生体或天然海水接种物测定海洋环境中塑料需氧生物降解的标准试验方法

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【英文标准名称】:StandardTestMethodforDeterminingAerobicBiodegradationofPlasticMaterialsintheMarineEnvironmentbyaDefinedMicrobialConsortiumorNaturalSeaWaterInoculum
【原文标准名称】:利用确定的微生物聚生体或天然海水接种物测定海洋环境中塑料需氧生物降解的标准试验方法
【标准号】:ASTMD6691-2009
【标准状态】:现行
【国别】:美国
【发布日期】:2009
【实施或试行日期】:
【发布单位】:美国材料与试验协会(US-ASTM)
【起草单位】:D20.96
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:aerobic;biodegradation;marineenvironment;plastics;Aerobic/anaerobicbiodegradation--plastics;Biodegradation--plastics;Marineenvironments;Microbialenvironments;Plastics--marine(shipping)applications
【摘要】:Theuseofplasticsaboardshipsisontheriseandtheuseoftheseaasatrashdumpingsiteisnolongerapossibility;consequently,thedisposalofplasticmaterialswhileatsearemainsamajorissue.Itispossiblethatbiodegradableplasticswillhelptoallaypublicconcernbyallowingforthesafedisposalofplasticmaterialsatsea.Thistestmethodhasbeendevelopedtoassesstherateanddegreeofaerobicbiodegradationofplasticsexposedtomarinemicroorganisms.Aerobicbiodegradationisdeterminedbymeasuringtheamountofbiogas(carbondioxide)producedduringsuchanexposure.Itisacceptabletousethedegreeandrateofaerobicbiodegradabilityofaplasticundertheconditionsofthistestmethodtoestimatethepersistenceofthatplasticinbiologicallyactivemarineenvironments,forexample,seashoreandopen-ocean.However,itshallberecognizedthatpredictinglong-termenvironmentalfateandeffectsfromtheresultsofshort-termexposuretoasimulatedmarineenvironmentisdifficult.Thus,cautionshallbeexercisedwhenextrapolatingtheresultsobtainedfromthisoranyothercontrolled-environmenttesttodisposalinthenaturalenvironment.1.1Thistestmethodisusedtodeterminethedegreeandrateofaerobicbiodegradationofplasticmaterials(includingformulationadditives)exposedtopre-grownpopulationofatleasttenaerobicmarinemicroorganismsofknowngeneraortheindigenouspopulationexistinginnaturalseawater.Thetestmethodisconductedundercontrolledlaboratoryconditions.1.2Thistestmethodisdesignedtoindexpolymermaterialsthatarepossiblybiodegradable,relativetoapositivereferencematerial,inanaerobicenvironment.1.3Thistestmethodisapplicabletoallpolymermaterialscontainingatleast20%carbonthatarenotinhibitorytothemicroorganismspresentinamarineenvironment.1.4ThevaluesstatedinSIunitsaretoberegardedasthestandard.1.5ThereisnosimilarorequivalentISOstandard.1.6Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:G31
【国际标准分类号】:13_030_99
【页数】:4P.;A4
【正文语种】:英语