| 硅藻土、石英砂和钾离子促进微生物转化酸性矿山废水中亚铁成次生矿物的研究 |
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| 引用本文： | 王敏,周立祥.硅藻土、石英砂和钾离子促进微生物转化酸性矿山废水中亚铁成次生矿物的研究[J].岩石矿物学杂志,2011,30(6):1031-1038. |
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| 作者姓名： | 王敏 周立祥 |
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| 作者单位： | 南京农业大学资源与环境科学学院环境工程系,江苏南京,210095 |
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| 基金项目： | 国家自然科学基金重点项目 |
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| 摘 要： | 嗜酸性氧化亚铁硫杆菌(Acidithiobacillus ferrooxidans)能够在低pH值条件下,迅速将Fe2+氧化并产生大量次生羟基硫酸铁沉淀,从而除去水中可溶性Fe2+。这为富含Fe2+的酸性矿山废水(acid mine drainage,AMD)处理提供了新的思路。本文从晶种刺激和阳离子诱导两个方面,分别研究了固定化载体(硅藻土、石英砂)和具有强诱导能力的成矾离子(K+)对微生物转化酸性体系中Fe2+成次生矿物的影响。结果表明,3种材料均有明显促进可溶性Fe2+向次生矿物转化的作用,且总铁(TFe)沉淀率与3种材料的添加量呈正相关关系。在起始Fe2+浓度为160mmol/L,硅藻土、石英砂和钾离子最大添加量分别为10 g、10 g和80 mmol/L时,经过72 h反应后,TFe沉淀率分别比对照增加了8%、24%和20%。矿物中的Fe、K和S元素含量与溶液中的起始K+浓度有非常密切的关系,随着K+浓度的增大,矿物中的K和S含量逐渐增加,而Fe含量则相应减少。
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| 关 键 词： | 酸性矿山废水 嗜酸性氧化亚铁硫杆菌 羟基硫酸铁矿物 晶种 钾 |
| 收稿时间： | 2010/11/25 0:00:00 |
| 修稿时间： | 2011/4/8 0:00:00 |
The removal of soluble ferrous iron in acid mine drainage (AMD) through the formation of biogenic iron oxyhydrosulfate precipitates facilitated by diatomite, quartz sand and potassium |
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| WANG Min and ZHOU Li-xiang.The removal of soluble ferrous iron in acid mine drainage (AMD) through the formation of biogenic iron oxyhydrosulfate precipitates facilitated by diatomite, quartz sand and potassium[J].Acta Petrologica Et Mineralogica,2011,30(6):1031-1038. |
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| Authors: | WANG Min and ZHOU Li-xiang |
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| Institution: | WANG Min and ZHOU Li-xiang(Department of Environmental Engineering,College of Resources and Environmental Sciences,Nanjing Agricultural University,Nanjing 210095,China) |
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| Abstract: | Acid mine drainage(AMD),resulting from the oxidation of iron pyrite(FeS2) and other sulfide minerals,is a major problem in coal-and metal-mining districts in that such water often has a lower pH and contains high concentrations of heavy metals as well as Fe and SO2-4.Preventing the formation or migration of AMD from its source is generally considered to be the preferable option.However,due to the practical operational difficulties in many locations,efforts are directed towards the collection and treatment o... |
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| Keywords: | acid mine drainage Acidithiobacillus ferrooxidans iron oxyhydrosulfate crystal seed K |
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