| 氧化还原生物对石门雄黄矿区尾矿砷释放行为研究 |
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| 引用本文： | 张明慧,刘璟.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,2020,39(2):203-210. |
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| 作者姓名： | 张明慧 刘璟 |
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| 作者单位： | 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,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 |
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| 基金项目： | 国家自然科学基金资助项目（41772367） |
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| 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:①T.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;②2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。
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| 关 键 词： | 雄黄矿 砷释放 生物氧化 生物还原 |
| 收稿时间： | 2019/4/9 0:00:00 |
| 修稿时间： | 2019/11/29 0:00:00 |
A study of the release behavior of arsenic in tailings of Shimen realgar mining area by redox organisms |
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| ZHANG Ming-hui and LIU Jing.A study of the release behavior of arsenic in tailings of Shimen realgar mining area by redox organisms[J].Acta Petrologica Et Mineralogica,2020,39(2):203-210. |
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| Authors: | ZHANG Ming-hui and LIU Jing |
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| Institution: | Southwest University of Science and Technology, Key Laboratory of Solid Waste Treatment and Resource Recycle of Ministry of Education, Mianyang 621010, China;Department of Agricultural Resources and Environment, Southwest University, Chongqing 400715, China and Southwest University of Science and Technology, Key Laboratory of Solid Waste Treatment and Resource Recycle of Ministry of Education, Mianyang 621010, China;Department of Agricultural Resources and Environment, Southwest University, Chongqing 400715, China |
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| Abstract: | 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:①Under 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;②Under 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. |
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| Keywords: | realgar arsenic release biological oxidation biological reduction |
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