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ID:33940136
大小:1.58 MB
页数:8页
时间:2019-03-02
《河道底泥中四氯双酚a的厌氧降解及硫酸盐还原菌对其降解效率的影响》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、第33卷第6期环境化学Vol.33,No.62014年6月ENVIRONMENTALCHEMISTRYJune2014DOI:10.7524/j.issn.0254⁃6108.2014.06.021河道底泥中四氯双酚A的厌氧降解及∗硫酸盐还原菌对其降解效率的影响111∗∗22刘世诚李玲玲任源黄志立张丽君(1.华南理工大学环境与能源学院,广州,510006;2.深圳职业技术学院应用化学与生物技术学院,深圳,518055)摘要本文采用血清瓶实验研究了贵屿镇练江底泥TCBPA的厌氧降解特性以及该过程中硫酸盐还原菌的变化情况.结果表明,在不同
2、还原条件下,TCBPA降解效率顺序为:产甲烷环境>硫酸盐还原环境>接种控制,-1-1-1对应降解速率常数分别为:0.0844d、0.0694d、0.0561d,半衰期分别为:8.2d、10.0d、12.4d.与接种控制-1组相比,加入电子供体可加速TCBPA降解,降解速率常数可达0.0722d,半衰期为9.6d.加入邻苯二甲酸丁-1酯后,TCBPA降解受到抑制,降解速率常数为0.0491d,半衰期为14.1d.使用ComparativeCt法进行荧光定量PCR实验,结果表明硫酸盐还原菌在TCBPA降解过程中起到了积极的作用.关键词四氯
3、双酚A,厌氧降解,河道底泥,硫酸盐还原菌,荧光定量PCR.AnaerobicbiodegradationofTCBPAinriversedimentandtheroleofSulfateReducingBacteria(SRB)inTCBPA′sdegradation111∗∗22LIUShichengLILinglingRENYuanHUANGZhiliZHANGLijun(1.SouthChinaUniversityofTechnology,CollegeofEnviromentandEnergy,Guangzhou,510006
4、,China;2.ShenzhenPolytechnic,SchoolofAppliedChemistryandBiologyTechnology,Shenzhen,518055,China)Abstract:Inthisresearch,serumbottleexperimentswereestablishedtoinvestigatetheanaerobictransformationofTCBPAwithLianjiangRiversediments(GuiyuTown,GuangdongProvince),andthechan
5、gesofsulfate-reducingbacteria(SRB)inthisprocess.TheresultsshowedthattheorderofanaerobicdegradationratesofTCBPAinthesedimentsunderdifferentreducingconditionswasmethanogeniccondition>sulfate-reducingcondition>inoculatedcontrol.Thedegradationrate-1-1-1constantsofeachcondit
6、ionwere0.0844d,0.0694d,and0.0561d,whiletheirhalf-liveswere8.2d,10.0d,and12.4d,respectively.ThedegradationrateofTCBPAwasenhancedbytheadditionofelectrondonors.Comparedwiththeinoculatedcontrolsample,thedegradationrate-1constantincreasedto0.0722dandthehalf⁃lifedecreasedto9.
7、6d.Ontheotherhand,thedegradationwasinhibitedbytheadditionofbutylphthalate.Thedegradationrateconstantdecreased-1to0.0491d,andthehalf⁃lifeincreasedto14.1d.RealtimePCRexperimentprovedthepositiveroleofSRBintheprocessofTCBPAdegradation.Keywords:tetrachlorobisphenolA,anaerobi
8、cdegradation,riversediments,sulfate⁃reducingbacteria,realtimePCR.四氯双酚A(Tetrachlorobisphenol⁃A,4,4⁃isopropylide
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