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三种人工湿地填料对低浓度氨氮废水的吸附特性

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刘莹, 刘晓晖, 张亚茹, 王炜亮. 三种人工湿地填料对低浓度氨氮废水的吸附特性[J]. 环境化学, 2018, 37(5): 1118-1127. doi: 10.7524/j.issn.0254-6108.2017082913
引用本文: 刘莹, 刘晓晖, 张亚茹, 王炜亮. 三种人工湿地填料对低浓度氨氮废水的吸附特性[J]. 环境化学, 2018, 37(5): 1118-1127. doi: 10.7524/j.issn.0254-6108.2017082913
shu
LIU Ying, LIU Xiaohui, ZHANG Yaru, WANG Weiliang. Adsorption properties of low concentration ammonia nitrogen wastewater by three constructed wetland fillers[J]. Environmental Chemistry, 2018, 37(5): 1118-1127. doi: 10.7524/j.issn.0254-6108.2017082913
Citation: LIU Ying, LIU Xiaohui, ZHANG Yaru, WANG Weiliang. Adsorption properties of low concentration ammonia nitrogen wastewater by three constructed wetland fillers[J]. Environmental Chemistry, 2018, 37(5): 1118-1127. doi: 10.7524/j.issn.0254-6108.2017082913
shu

三种人工湿地填料对低浓度氨氮废水的吸附特性

  • 1.

    山东师范大学地理与环境学院, 济南, 250358;

  • 2.

    清华大学环境学院, 北京, 100084;

  • 3.

    山东师范大学环境与生态研究院, 济南, 250358

  • 基金项目:

    山东师范大学研究生科研创新基金（SCX201737）和国家自然科学基金（41672340）资助.

Adsorption properties of low concentration ammonia nitrogen wastewater by three constructed wetland fillers

  • 1.

    College of geography and environment, Shandong Normal University, Ji'nan, 250358, China;

  • 2.

    School of Environment, Tsinghua University, Beijing, 100084, China;

  • 3.

    Institute of Environment and Ecology, Shandong Normal University, Ji'nan, 250358, China

  • Fund Project: Supported by Graduate Research Innovation Foundation (SCX201737) and the National Natural Science Foundation of China (41672340).

  • 摘要: 以沸石、陶粒、火山岩为试验材料，分别考察了不同初始氨氮浓度、pH、共存金属阳离子、温度对填料吸附氨氮的影响，并采用了吸附等温线、动力学和热力学对吸附过程进行解析.结果表明，Langmuir方程与Freundlich方程均能较好地描述氨氮在3种填料上的等温吸附行为.3种填料对氨氮的最大吸附量分别为0.9625 mg·g-1（沸石）、0.8643 mg·g-1（火山岩）和0.6928 mg·g-1（陶粒）.Freundlich方程中，1/n 4+的唯一控速步骤，吸附过程可能受到内扩散和表面吸附的共同影响.pH值介于6—9之间时，对氨氮有较好的去除效果.共存阳离子对氨氮的吸附具有抑制作用，具体表现为Al3+ > Mg2+ > Na+ > Ca2+.等温解吸试验表明，陶粒对氨氮的吸附以物理作用为主，而沸石和火山岩以离子交换为主.
    Abstract: Experiments were conducted on the adsorption properties of ammonia nitrogen by zeolite, ceramsite and lava at different initial concentration, pH, coexisting metal cations and temperature The adsorption isotherms of ammonia nitrogen on the three fillers were fitted with the Langmuir and Freundlich well. The maximal adsorption quantities of ammonia nitrogen on three fillers were 0.9625 mg·g-1 (zeolite), 0.8643 mg·g-1 (lava) and 0.6928 mg·g-1 (ceramsite), respectively. And in the Feundlich equation 1/n 4+ by fillers. The process may be the combined action of internal diffusion and surface adsorption. The removed of ammonia nitrogen by fillers was optimal at pH value between 6 and 9. There was an obvious inhibitory effect on adsorption of ammonia nitrogen in the presence of coexisting cations, which followed the order of Al3+ > Mg2+ > Na+ > Ca2+. The results of desorption experiment showed that physical adsorption maybe the main adsorption mechanism on ceramsite. The adsorption on zeolite and lava was dominated by ion exchange.
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  • 收稿日期:  2017-08-29
  • 刊出日期:  2018-05-15
刘莹, 刘晓晖, 张亚茹, 王炜亮. 三种人工湿地填料对低浓度氨氮废水的吸附特性[J]. 环境化学, 2018, 37(5): 1118-1127. doi: 10.7524/j.issn.0254-6108.2017082913
引用本文: 刘莹, 刘晓晖, 张亚茹, 王炜亮. 三种人工湿地填料对低浓度氨氮废水的吸附特性[J]. 环境化学, 2018, 37(5): 1118-1127. doi: 10.7524/j.issn.0254-6108.2017082913
shu
LIU Ying, LIU Xiaohui, ZHANG Yaru, WANG Weiliang. Adsorption properties of low concentration ammonia nitrogen wastewater by three constructed wetland fillers[J]. Environmental Chemistry, 2018, 37(5): 1118-1127. doi: 10.7524/j.issn.0254-6108.2017082913
Citation: LIU Ying, LIU Xiaohui, ZHANG Yaru, WANG Weiliang. Adsorption properties of low concentration ammonia nitrogen wastewater by three constructed wetland fillers[J]. Environmental Chemistry, 2018, 37(5): 1118-1127. doi: 10.7524/j.issn.0254-6108.2017082913
shu

三种人工湿地填料对低浓度氨氮废水的吸附特性

  • 1.  山东师范大学地理与环境学院, 济南, 250358;
  • 2.  清华大学环境学院, 北京, 100084;
  • 3.  山东师范大学环境与生态研究院, 济南, 250358
  • 收稿日期:  2017-08-29
基金项目:

山东师范大学研究生科研创新基金（SCX201737）和国家自然科学基金（41672340）资助.

摘要: 以沸石、陶粒、火山岩为试验材料，分别考察了不同初始氨氮浓度、pH、共存金属阳离子、温度对填料吸附氨氮的影响，并采用了吸附等温线、动力学和热力学对吸附过程进行解析.结果表明，Langmuir方程与Freundlich方程均能较好地描述氨氮在3种填料上的等温吸附行为.3种填料对氨氮的最大吸附量分别为0.9625 mg·g-1（沸石）、0.8643 mg·g-1（火山岩）和0.6928 mg·g-1（陶粒）.Freundlich方程中，1/n 4+的唯一控速步骤，吸附过程可能受到内扩散和表面吸附的共同影响.pH值介于6—9之间时，对氨氮有较好的去除效果.共存阳离子对氨氮的吸附具有抑制作用，具体表现为Al3+ > Mg2+ > Na+ > Ca2+.等温解吸试验表明，陶粒对氨氮的吸附以物理作用为主，而沸石和火山岩以离子交换为主.

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