Experimental study on U(Ⅵ) bioreduction by incubated sulfate reducing bacteria sediment in groundwater

LI Dianxin; HU Nan; HUANG Chao; DING Dexin; LI Guangyue; WANG Yongdong

doi:10.11949/j.issn.0438-1157.20180219

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Experimental study on U(Ⅵ) bioreduction by incubated sulfate reducing bacteria sediment in groundwater

更新时间：2025-12-10

- Experimental study on U(Ⅵ) bioreduction by incubated sulfate reducing bacteria sediment in groundwater
- CIESC Journal Issue 8, Pages: 3619-3625(2018)
- 作者机构：
  
  1. 南华大学铀矿冶生物技术国防重点学科实验室,湖南,衡阳,421001
  2. 南华大学极贫铀资源绿色开发技术湖南省重点实验室,湖南,衡阳,421001
- 作者简介：
- 基金信息：
- DOI：10.11949/j.issn.0438-1157.20180219
  CLC： 52
- Online First：05 August 2018，
  
  Published：05 August 2018
- 稿件说明：
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LI Dianxin, HU Nan, HUANG Chao, et al. Experimental study on U(Ⅵ) bioreduction by incubated sulfate reducing bacteria sediment in groundwater[J]. CIESC Journal, 2018, (8): 3619-3625.
DOI：

LI Dianxin, HU Nan, HUANG Chao, et al. Experimental study on U(Ⅵ) bioreduction by incubated sulfate reducing bacteria sediment in groundwater[J]. CIESC Journal, 2018, (8): 3619-3625. DOI： 10.11949/j.issn.0438-1157.20180219.

摘要

通过添加富集得到的含有丰富的硫酸盐还原菌的沉积物到沉积物-地下水微模型中，并添加乙醇作为碳源，分别与接种硫酸盐还原菌并添加碳源组和仅添加碳源组相比较，研究富集的硫酸盐还原菌沉积物对地下水中U（Ⅵ）还原的作用。结果表明，添加硫酸盐还原菌沉积物组、接种硫酸盐还原菌组和对照组中的铀浓度分别在第19、22和28 d下降至GB 23727-2009规定的0.05 mg·L-1排放标准以下。各组沉积物中具有还原U（Ⅵ）功能的微生物群落的多样性差异较小。添加硫酸盐还原菌沉积物组、接种硫酸盐还原菌组和对照组的沉积物中具有还原U（Ⅵ）功能的微生物群落的丰度分别为35.3%、32.5%和13.1%。由此可见，富集的硫酸盐还原菌沉积物增加了微模型中具有还原U（Ⅵ）功能的微生物群落的丰度，从而促进了U（Ⅵ）的还原。

Abstract

To study how the incubated sulfate reducing bacteria (SRB) sediment affects U(Ⅵ) bioreduction

the sediment together with ethanol was added into the sediment-groundwater microcosms

which were compared with microcosms amended with both pure SRB and ethanol and with ethanol only. The results indicated that uranium concentrations of the microcosms amended with the incubated SRB sediment together with ethanol

the pure SRB together with ethanol

and ethanol decreased below 0.05 mg·L-1 (GB 23727-2009) at day 19

22 and 28

respectively. The diversity of microbial communities capable of reducing U(Ⅵ) in all the microcosms had no significant difference. The abundances of microbial communities capable of reducing U(Ⅵ) in the microcosms amended with the incubated SRB sediment together with ethanol

and the pure SRB together with ethanol

in which ethanol were 35.3%

32.5% and 13.1%

respectively. The abundance of microbial communities capable of reducing U(Ⅵ) increased when the incubated SRB sediment together with ethanol was added into the sediment-groundwater microcosm. It is indicated that incubated SRB sediment could accelerate the bioreduction of U(Ⅵ) in the microcosm.

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Related Institution

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