| 亚铁对水平潜流人工湿地反硝化作用的影响 |
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| 引用本文： | 王苏艳,宋新山,赵志淼,王俊锋,宫志杰,肖艳萍,何媛.亚铁对水平潜流人工湿地反硝化作用的影响[J].环境科学学报,2016,36(2):557-563. |
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| 作者姓名： | 王苏艳 宋新山 赵志淼 王俊锋 宫志杰 肖艳萍 何媛 |
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| 作者单位： | 东华大学环境科学与工程学院, 国家环境保护纺织污染防治工程技术中心, 上海 201620,东华大学环境科学与工程学院, 国家环境保护纺织污染防治工程技术中心, 上海 201620,东华大学环境科学与工程学院, 国家环境保护纺织污染防治工程技术中心, 上海 201620,东华大学环境科学与工程学院, 国家环境保护纺织污染防治工程技术中心, 上海 201620,东华大学环境科学与工程学院, 国家环境保护纺织污染防治工程技术中心, 上海 201620,东华大学环境科学与工程学院, 国家环境保护纺织污染防治工程技术中心, 上海 201620,东华大学环境科学与工程学院, 国家环境保护纺织污染防治工程技术中心, 上海 201620 |
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| 基金项目： | 国家自然科学基金(No.51309503) |
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| 摘 要： | 亚铁离子可以作为电子供体参与反硝化作用,某些微生物可以通过氧化亚铁离子还原硝酸盐,从而去除污水中的硝态氮.本研究通过在潜流人工湿地中添加Fe2+,分析不同初始Fe2+浓度对反硝化过程的强化效果及不同C/N对Fe2+参与反硝化作用的影响.结果表明,Fe2+的添加可以显著提高人工湿地反硝化能力,进水NO-3-N为30 mg·L-1、C/N为2、水力停留时间为1 d,添加45 mg·L-1Fe2+的人工湿地中硝氮去除率可以提高24%;硝氮去除率随初始Fe2+浓度的增加而增加.C/N与初始Fe2+浓度对反硝化作用都具有显著影响且两者具有交互作用,碳源的存在可以促进Fe2+参与的反硝化作用.
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| 关 键 词： | 亚铁离子 反硝化 碳氮比 水平潜流人工湿地 |
| 收稿时间： | 4/8/2015 12:00:00 AM |
| 修稿时间： | 2015/5/18 0:00:00 |
The influence of Fe2+ on denitrification in horizontal subsurface flow constructed wetlands |
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| WANG Suyan,SONG Xinshan,ZHAO Zhimiao,WANG Junfeng,GONG Zhijie,XIAO Yanping and HE Yuan.The influence of Fe2+ on denitrification in horizontal subsurface flow constructed wetlands[J].Acta Scientiae Circumstantiae,2016,36(2):557-563. |
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| Authors: | WANG Suyan SONG Xinshan ZHAO Zhimiao WANG Junfeng GONG Zhijie XIAO Yanping and HE Yuan |
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| Institution: | College of Environmental Science and Engineering, State Environmental Protection Engineering Center for Pollution Treatment and Control in Textile Industry, Donghua University, Shanghai 201620,College of Environmental Science and Engineering, State Environmental Protection Engineering Center for Pollution Treatment and Control in Textile Industry, Donghua University, Shanghai 201620,College of Environmental Science and Engineering, State Environmental Protection Engineering Center for Pollution Treatment and Control in Textile Industry, Donghua University, Shanghai 201620,College of Environmental Science and Engineering, State Environmental Protection Engineering Center for Pollution Treatment and Control in Textile Industry, Donghua University, Shanghai 201620,College of Environmental Science and Engineering, State Environmental Protection Engineering Center for Pollution Treatment and Control in Textile Industry, Donghua University, Shanghai 201620,College of Environmental Science and Engineering, State Environmental Protection Engineering Center for Pollution Treatment and Control in Textile Industry, Donghua University, Shanghai 201620 and College of Environmental Science and Engineering, State Environmental Protection Engineering Center for Pollution Treatment and Control in Textile Industry, Donghua University, Shanghai 201620 |
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| Abstract: | Fe2+ can participate in denitrification as electron donor. Some microorganisms can use the electron which is given by oxidizing Fe2+ to Fe3+ to reduce NO3- or NO2-.In present study, the influences of external Fe2+ on denitrification for different C/N ratio in subsurface flow constructed wetlands were studied. Results showed that the external Fe2+ remarkably improved denitrification in constructed wetlands. Nitrate removal rate increased by about 24% by adding 45 mg·L-1 Fe2+ in the constructed wetlands under the condition of 30 mg·L-1 nitrate in influent, C/N=2 and 1 d of HRT. With the increasing of initial concentration of Fe2+, the removal capability of NO3--N presented a rising trend. Besides, there was an interaction between C/N and the initial concentration of Fe2+, which both had significant effects on denitrification. Carbon source promoted the denitrification that Fe2+ participated in. |
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| Keywords: | Fe2+ denitrification C/N subsurface flow constructed wetlands |
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