Z T/CSES69—Technicalguidelinesforscreeningofprioritypollutantsforbasinwaterqualitycriteria 發(fā)T/CSES69— 前 引 T/CSES69— 本文件按照GB/T1.1—2020《標(biāo)準(zhǔn)化工作導(dǎo)則第1部分：標(biāo)準(zhǔn)化文件的結(jié)構(gòu)和起草規(guī)則》的規(guī)定T/CSEST/CSES69—T/CSEST/CSES69— GB3838—2002GB5749水質(zhì)化學(xué)品化學(xué)品生物富集化學(xué)品HJ/T91HJ/T153DB43/T432流域水環(huán)境基準(zhǔn)優(yōu)控污染物riverbasinprioritypollutantsforwaterquality半數(shù)致死濃度/劑量mediumlethal用LD50或LC50表示。半數(shù)效應(yīng)濃度mediumeffective致癌性T/CSEST/CSES69—T/CSEST/CSES69—持久性最小作用劑量minimaleffective生物蓄積性L/kg。1水污染常規(guī)分析指水污染常規(guī)分析指 有機物、重金圖1 實驗及評價可參考GB5749、GB/T14581、GB/T21603、GB/T21605、GB/T21608、GB/T21858、GB/T27861、HJ/T91、HJ/T153、HJ831、HJ837、HJ838、DB43/T432等方法，有關(guān)數(shù)據(jù)來源的可靠性 （STox（SExp（SEco??=????????+????????+????????································································· 表1效應(yīng)/（LC50）（EC50）溞類半數(shù)致死濃度半數(shù)致死劑量根據(jù)不同的分級計算方法確定其各部分的毒性得分TS（ToxicityScore）值，然后以較小的TS值表22/3（CumulativeOrdinalRank,表310010mg/L≤LC50<1001mg/L≤LC50<100.1mg/L≤LC50<1LC50<0.1表4100mg/kg≤LD50<5004040010mg/kg≤LD50<1004mg/kg≤LD50<4040ppm≤LC50<4001mg/kg≤LD50<100.4mg/kg≤LD50<44ppm≤LC50<400.1mg/kg≤LD50<10.04mg/kg≤LD50<0.40.4ppm≤LC50<4LD50<0.1LD50<0.04LC50<0.4（MEDs表52當(dāng)當(dāng)logMED＜-3時，RVd=10當(dāng)-3＜logMED＜3時，RVd=-1.5logMED+5.5當(dāng)logMED＞3劑量等級值劑量等級值- - - - log圖2MEDRVd（2?????????????????=????????????????????×

············································Wanimal——動物的重量，單位為kg。

?????????????????′=????????????????????′×(

×70????······································MEDshuman’——人類的MEDs值，單位為mg/kg/day；MEDsanimal’——動物的MEDs值，單位為mg/kg/day； 表6表7潛在級別高高中高中低中低低 ????????=0.3??????+ SEXP——污染物環(huán)境暴露得分；SDF——污染物檢出頻率得分；SE——污染物暴露濃度得分。

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=(????+????+????)×600······························································RW，RS，RB——分別為污染物在檢測點位水、沉積物、生物體中的出現(xiàn)頻次； ????=??1????··········································································an——平均暴露濃度最大值；a1——平均暴露濃度最小值；q——等比常數(shù)。（9如某流域水體中污染物濃度范圍為0.001mg/L~600mg/L，則an=600，a1=0.001，n=6，代入公式（9）表8濃度范圍

SESW （SBCF，????????=??????+????????···································································SEco——污染物生態(tài)效應(yīng)得分；SHL——環(huán)境持久性得分(≤300)；9PBTProfiler表9半衰期≤44天<半衰期≤2020天<半衰期≤5050天<半衰期≤100半衰期>100鯉科或鮭科）試驗數(shù)據(jù)，試驗周期≥8d，以采用規(guī)范化試驗數(shù)據(jù)為主，確定數(shù)據(jù)范圍，取最大值的75%C值。表10BCF≤100logKow<3或者分子量100<BCF≤10003logKow<41000<BCF≤100004logKow<510000<BCF≤100000logKow≥5BCF>100000無logKow 表11