研究报告
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
人工湿地生物沸石快速吸附-再生性能与再生机理研究
- Study on the rapid adsorption-regeneration performance of bio-zeolite and its regeneration mechanism in a constructed wetland
- 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)
- 作者
- 单位
- 沈志强
- 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
- 牟锐
- 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
- 李元志
- 河北工程大学城市建设学院, 邯郸 056038
- 周岳溪
- 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
- 周继红
- 河北工程大学城市建设学院, 邯郸 056038
- 陈学民
- 兰州交通大学环境与市政工程学院, 兰州 730070
- 伏小勇
- 兰州交通大学环境与市政工程学院, 兰州 730070
- 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106.31mg·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Ca2+,30d后Ca2+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Ca2+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.
- 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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