| 建筑垃圾对城市雨水径流中Pb的吸附特性(英文) |
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| 引用本文： | 杨丽琼,王建龙,张晓然,车伍.建筑垃圾对城市雨水径流中Pb的吸附特性(英文)[J].东南大学学报,2014(2):212-219. |
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| 作者姓名： | 杨丽琼 王建龙 张晓然 车伍 |
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| 作者单位： | [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]北京建筑大学北京建筑节能减排关键技术协同创新中心,北京100044 [3]北京建筑大学北京应对气候变化研究和人才培养基地,北京100044 |
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| 基金项目： | The National Natural Science Foundation of China （No. 51208022）, the National Science and Technology Major Project of China （ No. 2011ZX07301-004431 ）. |
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| 摘 要： | 以砖混建筑垃圾为研究对象,采用人工模拟雨水,通过静态和动态吸附实验研究了不同粒径粒级建筑垃圾对雨水径流中Pb的吸附效果.实验结果表明:准二级动力学模型比准一级动力学模型能更好地描述建筑垃圾对Pb的吸附过程;Freundlich等温模型能较好地拟合其等温吸附过程;不同粒径粒级建筑垃圾均对雨水径流中的Pb具有较好的净化效果,去除率高达99%,粒径粒级越小,对Pb的净化效果越好,但其渗透性能越差;建筑垃圾的粒径粒级对Pb的吸附平衡时间、吸附速率和吸附量具有重要影响,粒径2.36~4.75mm的建筑垃圾对Pb的平衡吸附速率和平衡吸附量最大,分别为18.1μg/min和5.5μg/g.上述研究结果为城市雨水径流中Pb污染的有效控制以及建筑垃圾资源化提供了科学依据.
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| 关 键 词： | 雨水径流 重金属 建筑垃圾 吸附 |
Adsorption characteristics of Pb from urban stormwater runoff by construction wastes |
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| Yang Liqiong,Wang Jianlong,Zhang Xiaoran,Che Wu.Adsorption characteristics of Pb from urban stormwater runoff by construction wastes[J].Journal of Southeast University(English Edition),2014(2):212-219. |
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| Authors: | Yang Liqiong Wang Jianlong Zhang Xiaoran Che Wu |
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| Institution: | 1. Key Laboratory of Urban Stormwater System and Water Environment of Ministry of Education, Beijing University of Civil Engineering and Architecture, Beijing 100044, China) (2Beijing Cooperative Innovation Research Center on Architectural Energy Saving and Emission Reduction, Beijing University of Civil Engineering and Architecture, Beijing 100044, China) (3Beijing Climate Change Response Research and Education Center, Beijing University of Civil Engineering and Architecture, Beijing 100044, China) |
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| Abstract: | Construction wastes were selected as the adsorbents and static and dynamic adsorption batch experiments were carried out to investigate the adsorption of Pb to construction wastes with different particle size gradations in the simulated stormwater runoff system.The experimental results show that the pseudo-second-order kinetics model can better characterize the adsorption process of Pb than the pseudo-first-order kinetics model.The adsorption equilibrium data can be well fitted by the Freundlich isotherm model. The construction wastes with different tested size gradations can greatly remove Pb from stormwater runoff and their average removal rate can reach up to 99%.The construction wastes with narrow size distribution can better remove Pb but with worse permeability than those with wide size distribution. The particle size gradation of construction wastes greatly influences the equilibrium time rate and the capacity of Pb adsorption.The equilibrium adsorption rate and capacity are 18.1 μg/min and 5.5 μg/g respectively for the construction wastes with the size of 2.36 to 4.75 mm which are the greatest among the different size gradations.The present study provides a scientific basis for effectively controlling Pb pollution from stormwater runoff and the construction wastes resource utilization. |
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| Keywords: | stormwater runoff heavy metal construction waste adsorption |
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