优化化学浸提法对造纸白泥中汞形态的分析-论文.pdf

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1、环境污染与防治第36卷第3期2014年3月优化化学浸提法对造纸白泥中汞形态的分析*王相凤王凡王强张辰张凡(中国环境科学研究院，北京100012)摘要《固体废物浸出毒性浸出方法水平振荡法》(HJ557—2o1o)中规定的固体废物中各形态汞的逐级化学浸提周期较长，制取浸提液时的浸提时间为搅拌后恒温振荡8h，静置16h。对美国环境保护署提出的相关方法(USEPAMethod7471B，固体和固体废弃物中汞的测定(冷原子蒸汽技术))进行了改进，将水溶态汞、酸溶态汞测定的浸提液制取时间设定为搅拌后恒温振荡30min，静置2h(其他2种形态汞测定时未做优化)，采用

2、优化的化学浸提法来测定2种造纸白泥样品中不同形态汞的含量。测定结果表明，按照国标方法和优化方法测得的浸提液中水溶态汞、酸溶态汞含量的偏差均小于6，在可接受的范围(小于1o)内，优化方法的测定结果可靠；不同种类的造纸白泥中各形态汞的分布趋势是相同的，含量分别为水溶态汞>酸溶态汞>过氧化氢溶态汞>残渣态汞；2种造纸白泥样品中所含水溶态汞的比例均较高，这也为造纸自泥的安全资源化利用提供了有利条件关键词造纸白泥汞形态化学浸提HG-ICP—AESOptimizedchemicalextractionmethodformercuryspeciationofpape

3、rmakingwhitemudWANGXiangfeng，WANGFan，WANGQiang，ZHANGChen，ZHANGFan．(ChineseResearchAcademyofEnvironmentalSciences，Beijing100012)Abstract：Thesequentialchemicalextractiontechniquerecommendbysolidwaste-extractionprocedureforleachingtoxicity-horizontalvibrationmethod(HJ557—2010)hadth

4、edisadvantageoflongoperationperiod，theleachingtimeforleachingliquidpreparationwas8hofthermostaticoscillationfollowedby16hofstanding．Themercurydetermi—nationmethodproposedbyUSenvironmentalprotectionagency(USEPAMethod7471B，thedeterminationofmercu—ryinsolidandsolidwastes(coldatomic

5、vaportechnology))wasimprovedinthispaper，thewatersolublemercuryandacidsolublemercuryleachingliquidwaspreparedafter30minofthermostaticoscillationand2hofstanding．(Thedeterminationofothertwomercuryspeciationswasnotimproved)．Theoptimizedchemicalextractionmethodwasusedtodeterminediffe

6、rentmercuryspeciationsintWOtypesofwhitemudcollectedfrompapermakingmills．Re—suitsshowedthatthedeviationofwatersolublemercuryandacidsolublemercurymeasuredbynationalstandardmethodandoptimizationmethodwaslessthan6，whichwasinacceptablerange(<1O)，thedetectionresultwasreliable．Themercu

7、ryspeciationsintWOtypeswhitemudpresentedthesimilardistributiontrend，whichwaswatersolublemercury>acidsolublemercury>hydrogenperoxidesolublemercury>residualmercury．Thecontentofwatersolublemercurywasrelativehighinbothwhitemudsamples，whichprovidedfavorableconditionforsecureresourceu

8、tilizationofwhitemud．Keywords：whitemudofpaperma