抗輻射球菌對放射性銫的吸收及化學形態(tài)的影響.pdf

1、Y10‘2189澎≯Zhejiang擘一太i學SciTechUniversity碩士學位論文論文題目：拉疆翁硅螢!立煎型撞氌魚咝蝗叢氆豎型歪：麴疊塑學科專業(yè)：笙絲魚豎查盟主墮麴鱟作者姓名：拯蠹墜指導教師：蔓疊塑碴趑煎完成日期：蘭霪鐾皇堡二周浙江理工大學碩士學位論文Abstract137Cs，oneofimportantfissionproducts，wasmainlyreleasedintoenvironmentfromnucleart

2、estsandnuclearaccidents137Cscouldexistinenvironmentforalongtimeduetoitslonghalflifeof302yearsThebiosorptiveradioeesinmuptakecapacityofliveDeinococcusradioduranscellsWascharacterizedTheresultsshowedthatthemaximumuptakecap

3、acityof／)radioduransreachedto1817Bqg1(freshweightbasis)Theeffectsofmonovalent，bivalentandtrivalentcationsontheDradiodurans“suptakecapacityofradiocesiumwereevaluatedInbimetalliccombinationsasignificantinterferenceinradioc

4、esiumuptakeWasofferedbyNH4comparedwithNaandK7ForbivalentcationsthegrowthofDradioduransWasbadlyaffectedbypb2，whereas，theuptakeofradiocesiumcouldbeinhibitedbyCa2A13andCr3“showedaSCVCIecytotoxicitytoDradioduransofalltestedt

5、rivalentcationsDradioduranscouldgrowwellonlywhentheconcentrationof心andCl“抖werelowerthan1mMUptakeofradiocesinmbyDradioduranswasincreasedbythepresenceofCr3tosomeextentItisrecognizedthattheparticularbehavioroftracemetalsint

6、heenvironmentisdeterminedbytheirspecificchemicalformsratherthantheirtotalconcentrationItWasrevealedthatradiocesiummainlyexistedinsoilasresidualmetalphaseTheproportionsofradiocesiuminexchangeablephase，carbonatephase，ironm

7、anganeseoxidesphaseandorganicmatterphaseinthesoildecreasedafterinoculatedwithnradioduransandPseudomonassp，respectivelycomparedwithasepticcontr01After7daysincubation，theproportionofradiocesiuminresidualphasedecreasedsligh

8、tlyTheproportionofradioeesiuminexchangeablephaseinthesoilalsodecreasedslightlywhenthepresenceofDradioduranaandPseudomonasspwhileitkeptunchangedinasepticcontr01Theproportionofradiocesiumincarbonatephase，ironmanganeseoxide

9、sphase，andorganicmatterphaseincreasedalongwithalongerincubationtimeAbout678％ofthetotalradiocesiumuptakenbyDradioduranscellscouldbeextractedwithethan01TheresultsindicatedthatradioeesiumexistedmainlyintheformofehloftdeinDr