| 满江红对不同形态铀的吸附行为 |
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| 引用本文： | 谭煜健,胡南,张辉,胡劲松,黄新伟,丁德馨.满江红对不同形态铀的吸附行为[J].环境科学学报,2017,37(10):3713-3719. |
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| 作者姓名： | 谭煜健 胡南 张辉 胡劲松 黄新伟 丁德馨 |
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| 作者单位： | 南华大学铀矿冶生物技术国防重点学科实验室, 衡阳 421001,南华大学铀矿冶生物技术国防重点学科实验室, 衡阳 421001,南华大学铀矿冶生物技术国防重点学科实验室, 衡阳 421001,南华大学铀矿冶生物技术国防重点学科实验室, 衡阳 421001,南华大学铀矿冶生物技术国防重点学科实验室, 衡阳 421001,南华大学铀矿冶生物技术国防重点学科实验室, 衡阳 421001 |
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| 基金项目： | 国防基础重点基金（No.B3720132001）；国家自然科学基金（No.U1401231，11305087）；湖南省自然科学基金（No.13JJ6050）；湖南省教育厅优秀青年项目（No.14B150） |
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| 摘 要： | 首先采用Visual MINTEQ 3.1软件模拟了不同pH及不同浓度的碳酸盐或磷酸盐溶液中不同形态铀所占的比例;随后根据模拟结果,配制了5种分别含有UO_2~(2+)、(UO_2)_3(OH)_5~+、UO_2(OH)_3~-、UO_2(CO_3)_3~(4-)和UO_2PO_4~-的铀溶液;最后通过水培实验研究了满江红对这5种不同形态铀的吸附行为.结果表明,这5种不同形态铀对满江红的生长抑制率有显著差异,UO_2~(2+)、(UO_2)_3(OH)_5~+、UO_2(OH)_3~-及UO_2(CO_3)_3~(4-)均能抑制满江红的生长,其中,UO_2~(2+)对满江红的生长抑制率最高,而UO_2PO_4~-则可以促进满江红的生长,但满江红对UO_2~(2+)和(UO_2)_3(OH)_5~+的吸附效率相对较高.当溶液中铀的浓度为2 mg·L~(-1)时,UO_2~(2+)对满江红的富集量和富集系数分别达到了3831 mg·kg~(-1)和1916,(UO_2)_3(OH)_5~+对满江红的富集量和富集系数分别达到了3057 mg·kg~(-1)和1529.可见,要提高满江红对水中铀的去除率和富集量,应将溶液中铀的形态调控为以UO_2~(2+)或(UO_2)_3(OH)_5~+为主,同时要降低溶液中碳酸盐和磷酸盐的含量.
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| 关 键 词： | 铀形态 满江红 生长抑制率 吸附行为 |
| 收稿时间： | 2017/2/18 0:00:00 |
| 修稿时间： | 2017/3/28 0:00:00 |
Adsorption behavior of different species of uranium by Azolla anabaena |
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| TAN Yujian,HU Nan,ZHANG Hui,HU Jinsong,HUANG Xinwei and DING Dexin.Adsorption behavior of different species of uranium by Azolla anabaena[J].Acta Scientiae Circumstantiae,2017,37(10):3713-3719. |
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| Authors: | TAN Yujian HU Nan ZHANG Hui HU Jinsong HUANG Xinwei and DING Dexin |
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| Institution: | Key Discipline Laboratory for National Defense for Biotechnology in Uranium Mining and Hydrometallurgy, University of South China, Hengyang 421001,Key Discipline Laboratory for National Defense for Biotechnology in Uranium Mining and Hydrometallurgy, University of South China, Hengyang 421001,Key Discipline Laboratory for National Defense for Biotechnology in Uranium Mining and Hydrometallurgy, University of South China, Hengyang 421001,Key Discipline Laboratory for National Defense for Biotechnology in Uranium Mining and Hydrometallurgy, University of South China, Hengyang 421001,Key Discipline Laboratory for National Defense for Biotechnology in Uranium Mining and Hydrometallurgy, University of South China, Hengyang 421001 and Key Discipline Laboratory for National Defense for Biotechnology in Uranium Mining and Hydrometallurgy, University of South China, Hengyang 421001 |
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| Abstract: | Visual MINTEQ 3.1 was used to estimate the proportions of different species of uranium in solutions under different pH and carbonate and phosphate concentrations. Then, based on the simulation results, 5 solutions containing UO22+,(UO2)3(OH)5+, UO2(OH)3-, UO2(CO3)34- and UO2PO4-, respectively, were prepared. Finally, the adsorption behavior of the 5 different species of uranium by Azolla anabaena was studied through hydroponic experiments. The results show that the inhibition of A. anabaena growth rates by different species of uranium were significantly different.(UO2)3(OH)5+, UO2(OH)3- and UO2(CO3)34- inhibited, and UO22+ inhibited most on the growth of A. anabaena, but UO2PO4- promoted its growth. On the other hand, the adsorption efficiencies of UO22+ and (UO2)3(OH)5+ by A. anabaena were relatively high. When the concentration of uranium in solution was 2 mg·L-1, the bioaccumulation amount and bioaccumulation factor of UO22+ by A. anabaena reached 3831 mg·kg-1 and 1916, respectively, and its bioaccumulation amount and bioaccumulation factor for(UO2)3(OH)5+ were 3057 mg·kg-1 and 1529, respectively. Therefore, in order to increase the removal rate of uranium from water and the bioaccumulation amount of uranium by A. anabaena, the main species of uranium in solution should be regulated to UO22+ or (UO2)3(OH)5+, and the concentrations of carbonate and phosphate in solution should be reduced. |
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| Keywords: | uranium species Azolla anabaena growth inhibition rate adsorption behavior |
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