钚在地下水中的存在形式及影响因素分析
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摘要
运用PHREEQC模拟软件对西北某区钻孔地下水中钚的存在形式进行了模拟计算,结果显示,钚以Pu(Ⅳ)价态的Pu(CO3)2(OH)22-为主,占82.28%;其次为Pu(Ⅴ)价态的PuO2+、PuO2CO3-和Pu(Ⅵ)价态的PuO2(CO3)22-,分别占8.52%、7.82%和1.17%。同时研究了pH值和pE值对钚在地下水中存在形式的影响。
The existing forms of plutonium in groundwater from a drilling hole in a study region was simulated by the geochemical modeling program PHREEQC.The main conclusions are as follows:the main existing form of plutonium in the groundwater is Pu(Ⅳ) in Pu(CO3)2(OH)2-2 which take up 82.28%,the subordination chemical form is Pu(V)as PuO+2,PuO2CO-3 and Pu(Ⅵ) as PuO2(CO3)2-2 which take up 8.52%,7.82% and 1.17% respectively.In additon,the influence of pH and pE value on the existing forms of plutonium was also studied and it was found that pH and pE value have different impacts on the chemical form of plutonium.
The existing forms of plutonium in groundwater from a drilling hole in a study region was simulated by the geochemical modeling program PHREEQC.The main conclusions are as follows:the main existing form of plutonium in the groundwater is Pu(Ⅳ) in Pu(CO3)2(OH)2-2 which take up 82.28%,the subordination chemical form is Pu(V)as PuO+2,PuO2CO-3 and Pu(Ⅵ) as PuO2(CO3)2-2 which take up 8.52%,7.82% and 1.17% respectively.In additon,the influence of pH and pE value on the existing forms of plutonium was also studied and it was found that pH and pE value have different impacts on the chemical form of plutonium.
引文
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[9]谢水波,李泽昂,等.铀尾矿库区浅层地下水中U(Ⅵ)迁移的模拟[J].原子能科学技术,2007,41(1):58-64.
[10]马应明,金玉仁,等.镎、钚在西北某区地下水中化学形态的模拟计算[J].辐射防护,2009,29(1):40-45.
[11]张展适,周文斌,等.镎、钚、锶在黄土地下水中地球化学行为的模拟研究[J].辐射防护,2003,23(6):355-360.
[2]王驹,张铁岭,郑华玲,等译.世界放射性废物地质处置[M].北京:原子能出版社,1999.
[3]潘自强.核能与可持续发展[J].科技导报,2003,(7):9-12.
[4]杨明太.放射性核素迁移研究的现状(续)[J].核电子学与探测技术,2006,26(1):126-129.
[5]杨明太.放射性核素迁移研究的现状[J].核电子学与探测技术,2005,25(6):878-881.
[6]Parkhurst D L,Appelo C A J.User’s guide to PHREEQC(Version2)-A computer program for speciation,batch-reaction,one-dimensional trans-port,and inverse geochemical calculations[R].Water-Resources Investigations Report99-4259,Denver,Colorado,1999.
[7]Parkhurst D L,Thorstenson D C,Plummer,L N.PHREEQE-A computer program for geochemi-cal calculations[R].U.S.Geological Survey Wa-ter-Resources Investigations Report80-96,1980(Revised and reprinted August,1990).116-121.
[8]李志强.某核废物处置场地下水中铀元素迁移模拟研究[D].成都理工大学,2009.
[9]谢水波,李泽昂,等.铀尾矿库区浅层地下水中U(Ⅵ)迁移的模拟[J].原子能科学技术,2007,41(1):58-64.
[10]马应明,金玉仁,等.镎、钚在西北某区地下水中化学形态的模拟计算[J].辐射防护,2009,29(1):40-45.
[11]张展适,周文斌,等.镎、钚、锶在黄土地下水中地球化学行为的模拟研究[J].辐射防护,2003,23(6):355-360.