某尾矿库尾矿渗水中铀的化学形态研究
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摘要
运用环境水化学平衡软件Visual MINTEQ 3.1研究了某尾矿库尾矿渗水中铀的化学形态,并模拟在不同pH、F-浓度、U浓度等条件下铀化学形态的变化规律。结果表明:尾矿渗水中,铀主要以UO_2F~+和UO_2F_2(aq)形态存在;pH对铀的存在形态影响较大,F-和铀在较低浓度范围内对铀的化学形态影响不明显,但对其浓度影响较大。
The uranium's chemical species in seepage of uranium tailings was studied by the Visual MINTEQ 3.1 soft.The effects of some factors such as pH,concentration of F-and uranium on chemical species of uranium were examined.The results show that UO_2F~+ and UO_2F_2(aq)are mainly species of uranium in the seepage.Uranium forms in the seepage are mainly affected by solution pH.The change of concentration of F-and uranium has less influence on the chemical species of uranium,but has a significant influence on the content of uranium species.
The uranium's chemical species in seepage of uranium tailings was studied by the Visual MINTEQ 3.1 soft.The effects of some factors such as pH,concentration of F-and uranium on chemical species of uranium were examined.The results show that UO_2F~+ and UO_2F_2(aq)are mainly species of uranium in the seepage.Uranium forms in the seepage are mainly affected by solution pH.The change of concentration of F-and uranium has less influence on the chemical species of uranium,but has a significant influence on the content of uranium species.
引文
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[2]魏广芝,徐乐昌.低浓度含铀废水的处理技术及其研究进展[J].铀矿冶,2007,26(2):90-95.
[3]王辉,孔凡峰,李世俊,等.分段中和法处理铀矿山酸性废水[J].湿法冶金,2013,32(5):329-332.
[4]李雷明,许建新,安朝,等.尕斯库勒湖区不同水体中铀化学形态的模拟研究[J].盐湖研究,2013,21(2):18-25.
[5]王祥云,陈涛,刘春立.高放废物地质处置中的模型[J].化学进展,2011,23(7):1400-1410.
[6]WANG Xiangyun,CHENG Tao,LIU Chunli.Chemical speciation code chemspec and its applications[J].Science in China Series:B:Chemistry,2009,52(11):2020-2032.
[7]常阳,崔建勇,谭靖,等.尕斯库勒盐湖水中铀形态分布及影响因素研究[J].世界核地质科学,2016,33(2):106-110.
[8]陈戏三,康厚军,张东,等.铀在地下水中的化学形态模拟研究[J].化学研究与应用,2007,19(10):1118-1122.
[9]刘杰安,冯孝贵.几个常用地球化学模拟软件的比较[J].核化学与放射化学,2011,33(1):32-41.
[10]ALLISON J D,BROWN D S,NOVO-GRADAC K J.MINTEQA2/PRODEFA2,a geochemical assessment model for environmental systems:Version 3.0 user’s manual[M].Washington,DC:US Government Printing Office,1991:371-383.
[11]王德义,谌竟清,赵淑良.铀的提取与精制工艺学[M].北京:原子能出版社,1982:37.