| 改性凹凸棒土/纳米铁复合材料与微生物耦合去除地下水硝酸盐氮的研究 |
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| 引用本文： | 董磊,林莉,李青云,吴敏,郦超.改性凹凸棒土/纳米铁复合材料与微生物耦合去除地下水硝酸盐氮的研究[J].环境科学研究,2017,30(7):1112-1119. |
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| 作者姓名： | 董磊 林莉 李青云 吴敏 郦超 |
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| 作者单位： | 1.长江水利委员会长江科学院流域水环境研究所, 湖北 武汉 430010 |
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| 基金项目： | 国家自然科学基金项目(41302204)；中央级公益性科研院所基本科研业务费(CKSF2016025/SH)；水利技术示范类项目(SF-201602) |
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| 摘 要： | 地下水是我国重要的饮用水源之一，国内部分地区地下水NO3--N含量超标，对人体健康造成潜在威胁.采用模拟装置考察改性凹凸棒土/纳米铁复合材料、反硝化细菌及其耦合体系对地下水NO3--N去除效果及脱氮产物的变化特征.结果表明，在模拟地下水溶解氧ρ（DO）为0.3 mg/L]、温度（15℃）和黑暗环境下，50 mg改性凹凸棒土/纳米铁复合材料与50 mg/L NO3--N反应，7 d后NO3--N去除率为43.7%，其中63.6%的还原产物转化为NH4+-N，几乎无NO2--N生成，TN去除率为15.9%；反硝化细菌体系中，7 d后NO3--N去除率仅为9.7%，其中NO2--N占4.1%，几乎无NH4+-N生成，TN去除率为5.3%；在改性凹凸棒土/纳米铁复合材料-反硝化细菌耦合体系中，7 d后NO3--N去除率为80.6%，其中NH4+-N占33.2%、NO2--N占12.1%，TN去除率为35.2%.研究显示，模拟地下水环境下，改性凹凸棒土/纳米铁复合材料-反硝化细菌耦合体系对NO3--N去除效果最好，TN去除率高.
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| 关 键 词： | 地下水 硝酸盐氮 改性凹凸棒土/纳米铁复合材料 微生物 |
| 收稿时间： | 2016/12/17 0:00:00 |
| 修稿时间： | 2017/3/6 0:00:00 |
Removal of Nitrate from Groundwater by Coupling System Composed with Modified Attapulgite/Fe Nano Composites and Microorganisms |
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| DONG Lei,LIN Li,LI Qingyun,WU Min and LI Chao.Removal of Nitrate from Groundwater by Coupling System Composed with Modified Attapulgite/Fe Nano Composites and Microorganisms[J].Research of Environmental Sciences,2017,30(7):1112-1119. |
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| Authors: | DONG Lei LIN Li LI Qingyun WU Min and LI Chao |
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| Affiliation: | 1.Basin Water Environmental Research Department, Changjiang River Scientific Research Institute, Changjiang Water Resources Commission, Wuhan 430010, China2.Key Laboratory of Basin Water Resource and Eco-Environmental Science in Hubei Province, Changjiang River Scientific Research Institute, Changjiang Water Resources Commission, Wuhan 430010, China |
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| Abstract: | Groundwater is an important source of drinking water in China.However, nitrate levels are above the limits in some areas, posing a serious threat to human health.NO3--N removal efficiency and characteristics of reaction products in groundwater by modified attapulgite/Fe nano composites, denitrifying bacteria and its coupling system were studied using simulation experiments.The results showed that the NO3--N removal ratio of modified attapulgite/Fe nano composites was 43.7% after 7 d(experimental conditions:15℃, DO 0.3 mg/L, dark).63.6% of the product was NH4+-N, while few NO2--N was generated; 15.9% TN was removed.As for denitrifying bacteria system, the removal rate of NO3--N was only 9.7% after 7 days, and the product of NO2--N was 4.1% with almost no NH4+-N generated; only 5.3% TN was removed.NO3--N removal efficiency was 80.6% after 7 days in the coupling system, and the product included 33.2% NH4+-N and 12.1% NO2--N; TN removal efficiency achieved 35.2%.Therefore, the coupling system was the best method with the highest TN removal efficiency for NO3--N among these three methods. |
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| Keywords: | groundwater nitrate nitrogen modified attapulgite/Fe nano composites microorganism |
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