| 人工湿地生物沸石快速吸附-再生性能与再生机理研究 |
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| 引用本文： | 沈志强,牟锐,李元志,周岳溪,周继红,陈学民,伏小勇.人工湿地生物沸石快速吸附-再生性能与再生机理研究[J].环境科学学报,2016,36(4):1242-1247. |
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| 作者姓名： | 沈志强 牟锐 李元志 周岳溪 周继红 陈学民 伏小勇 |
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| 作者单位： | 1. 中国环境科学研究院水污染控制技术研究中心, 北京 100012;2. 中国环境科学研究院环境基准与风险评估国家重点实验室, 北京 100012,1. 中国环境科学研究院水污染控制技术研究中心, 北京 100012;2. 兰州交通大学环境与市政工程学院, 兰州 730070,河北工程大学城市建设学院, 邯郸 056038,1. 中国环境科学研究院水污染控制技术研究中心, 北京 100012;2. 中国环境科学研究院环境基准与风险评估国家重点实验室, 北京 100012,河北工程大学城市建设学院, 邯郸 056038,兰州交通大学环境与市政工程学院, 兰州 730070,兰州交通大学环境与市政工程学院, 兰州 730070 |
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| 基金项目： | 国家科技支撑计划课题(No.2012BAJ21B01-02);中国博士后科学基金(No.2012M520351) |
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| 摘 要： | 在填充生物沸石和石灰石的强化硝化模拟人工湿地中,考察了生物沸石快速吸附-再生动态平衡性能和生物沸石再生的机理.研究结果表明,生物沸石模拟人工湿地中硝化作用明显,产生的氧化态氮主要为硝氮,平均浓度为106.31 mg·L~(-1)(大于吸附去除的氨氮浓度).模拟人工湿地出水中的金属阳离子主要为Na+和Ca~(2+),30 d后Ca~(2+)浓度大于Na+浓度.生物沸石的再生是离子交换释放氨氮和微生物协同作用的结果.石灰石缓慢释放的Ca~(2+)可促进生物沸石再生,生物沸石与石灰石投加量的最佳质量比为5∶1.生物沸石再生过程中,微生物起主导作用.
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| 关 键 词： | 生物沸石 人工湿地 氨氮 硝化 再生 |
| 收稿时间： | 2015/6/18 0:00:00 |
| 修稿时间： | 2015/8/17 0:00:00 |
Study on the rapid adsorption-regeneration performance of bio-zeolite and its regeneration mechanism in a constructed wetland |
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| SHEN Zhiqiang,MOU Rui,LI Yuanzhi,ZHOU Yuexi,ZHOU Jihong,CHEN Xuemin and FU Xiaoyong.Study on the rapid adsorption-regeneration performance of bio-zeolite and its regeneration mechanism in a constructed wetland[J].Acta Scientiae Circumstantiae,2016,36(4):1242-1247. |
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| Authors: | SHEN Zhiqiang MOU Rui LI Yuanzhi ZHOU Yuexi ZHOU Jihong CHEN Xuemin and FU Xiaoyong |
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| Institution: | 1. Research Center of Water Pollution Control Technology, Chinese Research Academy of Environmental Sciences, Beijing 100012;2. State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012,1. Research Center of Water Pollution Control Technology, Chinese Research Academy of Environmental Sciences, Beijing 100012;2. School of Environmental and Municipal Engineering, Lanzhou Jiaotong University, Lanzhou 730070,School of Urban Construction, Hebei University of Engineering, Handan 056038,1. Research Center of Water Pollution Control Technology, Chinese Research Academy of Environmental Sciences, Beijing 100012;2. State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012,School of Urban Construction, Hebei University of Engineering, Handan 056038,School of Environmental and Municipal Engineering, Lanzhou Jiaotong University, Lanzhou 730070 and School of Environmental and Municipal Engineering, Lanzhou Jiaotong University, Lanzhou 730070 |
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| Abstract: | In a constructed wetland filled with bio-zeolite and limestone, the adsorption behavior, biological regeneration dynamic equilibrium performance and the biological regeneration mechanism of bio-zeolite were investigated. The results show that in the constructed wetland with bio-zeolite, nitrification occurred obviously and the product primarily was NO3--N, with the average concentration of 106.31 mg·L-1, which is higher than the adsorbed ammonia nitrogen concentration. In the effluent of the constructed wetland, the main metal cations were Na+ and Ca2+, and the concentration of Ca2+ was higher than Na+ after 30 d. The regeneration of bio-zeolite was the result of synergistic effect of ion exchange releasing ammonia nitrogen and nitrification. Ca2+ slowly-released from limestone could promote the regeneration of bio-zeolite, and the optimum mass ratio of bio-zeolite to limestone was 5:1. Microorganisms played a significant role in the process of the regeneration of bio-zeolite. |
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| Keywords: | bio-zeolite constructed wetland ammonia nitrogen nitrification regeneration |
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