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1、中国环境科学2011,31(1)：50~55ChinaEnvironmentalScience表面改性秸秆生物质环境材料对水中PAHs的吸附性能*何娇,孔火良,高彦征(南京农业大学资源与环境科学学院,土壤有机污染控制与修复研究所,江苏南京210095)摘要：300~700℃下热解炭化芝麻秸秆8h后,再用H3PO4溶液进行表面改性,制备了芝麻秸秆生物质环境材料.测定了生物质环境材料比表面积及其对亚甲基蓝和碘的吸附能力,并以多环芳烃(PAHs)为目标污染物,探讨了生物质环境材料对水中不同固液比(0.01g/32ml和0.02g/32mL)下单一PAHs菲以及复合
2、PAHs萘、苊、菲的吸附性能.结果表明,随热解温度升高,秸秆生物质环境材料比表面积增大,对碘和2亚甲基蓝的吸附能力也增强,700°C时比表面积、碘值和亚甲基蓝吸附值的最大值分别为269.95m/g、434mg/g和150mg/g.生物质环境材料吸附水中PAHs的能力强,700℃时0.01g材料对32mL水中萘、苊、菲的去除率分别高达94.44%、95.47%和100%,均比相同条件下未经H3PO4改性的秸秆生物质环境材料高.关键词：芝麻秸秆；生物质环境材料；表面改性；多环芳烃；吸附中图分类号：X703.1文献标识码：A文章编号：1000-6923(2011)
3、01-0050-06RemovalofPAHsfromaqueoussolutionbythesurfacemodified-stalkenvironmentalbiomaterials.HEJiao,KONG*Huo-liang,GAOYan-zheng(InstituteofOrganicContaminantControlandSoilRemediation,CollegeofResourceandEnvironmentalScience,NanjingAgriculturalUniversity,Nanjing210095,China).ChinaE
4、nvironmentalScience,2011,31(1)：50~55Abstract：Thesesamestalkswerepyrolyzedandcharredfor8hintherangeof300~700℃,andthensurfacemodifiedbyH3PO4,thestalkenvironmentalbiomaterialswasprepared.TheBETspecificsurfaceareas,methyleneblueandiodineadsorptioncapacityofthestalkenvironmentalbiomater
5、ialsweredetermined.Thesorptionefficiencyofthesematerialsonsinglepolycyclicaromatichydrocarbon(PAHs)andmixingPAHsnaphthalene,acenaphthene,andphenanthrenewereinvestigatedatdifferentsolid-liquidratios,respectively.TheBETspecificsurfaceareasofstalkbiomaterialsenlarged,andthesorptionabi
6、lityonmethyleneblueandiodineenhancedwithincreasingthetreatmenttemperature.Themaximum2valuesobservedat700°Cwere269.95m/gand434,150mg/g,respectively.TheobtainedstalkbiomaterialscouldeffectivelyremovethePAHsfromwater.Forinstance,94.44%,95.47%,and100%ofnaphthalene,acenaphthene,andphena
7、nthrenein32mLwaterwereremovedby0.01gbiomaterialsobtainedbysesamestalkat700℃.AndthesestalkenvironmentalbiomaterialshigherthanthosewithoutH3PO4-modifiedunderthesameconditions.Resultsofthisworkwouldprovidesomeinsightintothereuseofcropstalks,andalsoopenanewviewonthetreatmentoforganicpo
8、llutedwaterutilizingbiomat
