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氧化还原生物对石门雄黄矿区尾矿砷释放行为研究
A study of the release behavior of arsenic in tailings of Shimen realgar mining area by redox organisms
投稿时间:2019-04-09  修订日期:2019-11-29
中文关键词:雄黄矿  砷释放  生物氧化  生物还原
英文关键词:realgar  arsenic release  biological oxidation  biological reduction
基金项目:国家自然科学基金资助项目(41772367)
作者单位E-mail
张明慧 固体废物处理与资源化教育部重点实验室 西南科技大学, 四川 绵阳 621010
西南大学 资源环境学院, 重庆 400715 
 
刘璟 固体废物处理与资源化教育部重点实验室 西南科技大学, 四川 绵阳 621010
西南大学 资源环境学院, 重庆 400715 
liujing-vip@163.com 
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中文摘要:
      对石门4处典型不同种类的含砷尾矿进行样品采集,并采用1种氧化菌(氧化亚铁硫杆菌,Thiobacillus ferrooxidans,简称T.f)和2种还原菌(硫酸盐还原菌,sulfate reducing bacteria,简称SR;嗜酸铁还原菌,Acidiphilium cryptum JF-5,简称JF-5)分别对其进行作用,据此研究生物还原和氧化条件下原生和次生含砷矿物的释砷情况,进而确定潜在的释砷风险。ICP-OES定量分析显示,3种细菌作用后,雄黄矿和雌黄矿的砷释出浓度都不断升高。168 h氧化菌T.f作用后的砷释出顺序为雌黄矿 > 淋滤液次生含砷矿物 > 雄黄矿 > 含砷夹矸尾矿。LC-AFS原子荧光分析释出液砷形态结果表明:① T.f作用后,雄黄矿和雌黄矿表现出非常明显的差异;1.5 h作用后4种含砷矿物释放As(Ⅴ)的顺序为含砷夹矸尾矿 > 雄黄矿 > 淋滤液次生含砷矿物 > 雌黄矿;② 2种还原菌作用后,SR更能促进雌黄矿释放的As(Ⅲ),其释放量是JF-5的2倍;雌黄矿释出As(Ⅲ)在168 h达到20.64 mg/L(SR)和9.54 mg/L(JF-5)。96 h SR作用后4种含砷矿物释放As(Ⅲ)的顺序为雌黄矿 > 淋滤液次生含砷矿物 > 含砷夹矸尾矿 > 雄黄矿。96 h JF-5作用后4种含砷矿物释放As(Ⅲ)的顺序为雄黄矿 > 雌黄矿 > 含砷夹矸尾矿 > 淋滤液次生含砷矿物。
英文摘要:
      Collecting four different types of arsenic-containing minerals in Shimen realgar mining area, using Thiobacillus ferrooxidans(T. f), sulfate reducing bacteria(SR) and Acidiphilium cryptum JF-5(JF-5) to investigate the release of arsenic from primary and secondary arsenic-containing minerals under biological reduction and oxidation conditions to determine the potential risk of arsenic release. Quantitative analysis by ICP-OES showed that the concentration of arsenic in both realgar tailing and orpiment tailing was increasing under the action of the above T. f, SR and JF-5. Arsenic released at 168 h under the action of T. f:orpiment tailing > leachate secondary arsenic-containing tailing > realgar tailing > arsenic containing clip rock tailing. The results of LC-AFS atomic fluorescence spectrometry release showed that:① Under the action of T. f, realgar tailing and orpiment tailing showed very obvious differences; after 1.5 h, the order of releasing As(V) for four arsenic-containing minerals is:arsenic containing clip rock tailing > realgar tailing > leachate secondary arsenic-containing tailing > orpiment tailing; ② Under the action of JF-5 and SR, SR can promote the release of As(Ⅲ) from the orpiment tailing, which is twice as much as JF-5; the orpiment tailing releases As(Ⅲ) reached to 20.64 mg/L (SR) and 9.54 mg/L (JF-5) at 168 h. The order of release of As(Ⅲ) from four arsenic-containing minerals under the action of SR at 96 h was:orpiment tailing > leachate secondary arsenic-containing tailing > arsenic containing clip rock tailing > realgar tailing; the order of release of As(III) by four arsenic-containing minerals after 96 h of action of JF-5 is realgar tailing > orpiment tailing > arsenic containing clip rock tailing > leachate secondary arsenic-containing tailing.
张明慧,刘璟,2020,氧化还原生物对石门雄黄矿区尾矿砷释放行为研究[J].岩石矿物学杂志,(2):203~210.
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