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建筑垃圾对雨水径流中磷的吸附特性

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林宏军, 王建龙, 周文韬, 刘欣宇, 孙铮, 高杰, 杨新生. 建筑垃圾对雨水径流中磷的吸附特性[J]. 环境化学, 2020, (3): 726-734. doi: 10.7524/j.issn.0254-6108.2019103110
引用本文: 林宏军, 王建龙, 周文韬, 刘欣宇, 孙铮, 高杰, 杨新生. 建筑垃圾对雨水径流中磷的吸附特性[J]. 环境化学, 2020, (3): 726-734. doi: 10.7524/j.issn.0254-6108.2019103110
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LIN Hongjun, WANG Jianlong, ZHOU Wentao, LIU Xinyu, SUN Zheng, GAO Jie, YANG Xinsheng. Adsorption characteristics of construction waste for phosphorus removal from stormwater runoff[J]. Environmental Chemistry, 2020, (3): 726-734. doi: 10.7524/j.issn.0254-6108.2019103110
Citation: LIN Hongjun, WANG Jianlong, ZHOU Wentao, LIU Xinyu, SUN Zheng, GAO Jie, YANG Xinsheng. Adsorption characteristics of construction waste for phosphorus removal from stormwater runoff[J]. Environmental Chemistry, 2020, (3): 726-734. doi: 10.7524/j.issn.0254-6108.2019103110
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建筑垃圾对雨水径流中磷的吸附特性

  • 1. 北京建筑大学城市雨水系统与水环境省部共建教育部重点实验室, 北京, 100044;

  • 2. 北京未来城市设计高精尖创新中心, 北京, 100044;

  • 3. 北京石泰基础设施投资有限公司, 北京, 100043

    • 通讯作者: 王建龙, E-mail: wjl_xt@163.com ; 
  • 基金项目:

    北京市石景山区科学技术委员会课题（KW20）资助.

Adsorption characteristics of construction waste for phosphorus removal from stormwater runoff

  • 1. Key Laboratory of Urban Stormwater System and Water Environment, Beijing University of Civil Engineering and Architecture, Ministry of Education, Beijing, 100044, China;

  • 2. Beijing Advanced Innovation Center for Future Urban Design, Beijing, 100044, China;

  • 3. Beijing Shitai Infrastructure Investment Co., Ltd. Beijing, 100043, China

    • Corresponding author: WANG Jianlong, wjl_xt@163.com ; 
  • Fund Project: Supported by Beijing Shijingshan District Science and Technology Committee Project (KW20).

  • 摘要: 以经过筛分、破碎等预处理后的砖砼建筑垃圾为研究对象，采用人工模拟雨水径流，通过静态吸附、动态吸附和脱附实验，研究了不同粒径粒级建筑垃圾对雨水径流中磷酸根的吸附效果和脱附特征.结果表明，建筑垃圾对磷酸根的吸附过程更符合准二级动力学模型，Langmuir等温模型能较好地描述其等温吸附过程；粒径粒级对建筑垃圾吸附磷酸根的效果具有重要影响，粒径粒级越小，对磷的去除效率越高，1-2.5 mm粒径的建筑垃圾对磷酸根去除率最大，其值为55%，建筑垃圾的粒径对磷的吸附平衡时间、吸附速率和吸附量也具有较大影响，粒径粒级1-2.5 mm的建筑垃圾对磷酸根的平衡吸附量最大值为7.8 μg·g-1.建筑垃圾吸附的磷酸根在雨水径流pH值为5-9的范围内溶出风险较小.
    Abstract: The adsorption and desorption of phosphate from stormwater runoff by construction waste of different particle size were characterized in this study. Static adsorption, dynamic adsorption, and desorption experiments were carried out, with pretreated (e.g., screening and crushing) brick-concrete construction waste and artificially simulated stormwater runoff. The pseudo-second-order kinetic model was found to explain the adsorption process of phosphate onto construction waste most effectively, and the Langmuir isotherm model fitted the isothermal adsorption process well. Furthermore, the particle size of the construction waste significantly affected the adsorption of phosphate, with the smaller the particle size, the higher the phosphate removal rate. The maximum phosphate removal (55%) was observed at a particle size of 1-2.5 mm. Moreover, the particle size also strongly affected the adsorption equilibrium time, rate and capacity of phosphate onto construction waste, with maximum capacity (7.8 μg·g-1) observed at a particle size of 1-2.5 mm. Lower risk of desorption was found at a pH of 5-9 of the stormwater runoff.
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  • 收稿日期:  2019-10-31

建筑垃圾对雨水径流中磷的吸附特性

    通讯作者: 王建龙, E-mail: wjl_xt@163.com ; 
  • 1. 北京建筑大学城市雨水系统与水环境省部共建教育部重点实验室, 北京, 100044;
  • 2. 北京未来城市设计高精尖创新中心, 北京, 100044;
  • 3. 北京石泰基础设施投资有限公司, 北京, 100043
  • 收稿日期:  2019-10-31
基金项目:

北京市石景山区科学技术委员会课题（KW20）资助.

摘要: 以经过筛分、破碎等预处理后的砖砼建筑垃圾为研究对象，采用人工模拟雨水径流，通过静态吸附、动态吸附和脱附实验，研究了不同粒径粒级建筑垃圾对雨水径流中磷酸根的吸附效果和脱附特征.结果表明，建筑垃圾对磷酸根的吸附过程更符合准二级动力学模型，Langmuir等温模型能较好地描述其等温吸附过程；粒径粒级对建筑垃圾吸附磷酸根的效果具有重要影响，粒径粒级越小，对磷的去除效率越高，1-2.5 mm粒径的建筑垃圾对磷酸根去除率最大，其值为55%，建筑垃圾的粒径对磷的吸附平衡时间、吸附速率和吸附量也具有较大影响，粒径粒级1-2.5 mm的建筑垃圾对磷酸根的平衡吸附量最大值为7.8 μg·g-1.建筑垃圾吸附的磷酸根在雨水径流pH值为5-9的范围内溶出风险较小.

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