INFLUENCING MECHANISM OF PERMEABLE PAVEMENT TYPE ON REMOVAL EFFICIENCY OF HEAVY METALS FROM RUNOFF
-
摘要: 研究了不同类型透水铺装系统对径流重金属的去除效能和机制。在实验室搭建了3种典型透水铺装系统(陶瓷透水砖、透水沥青和透水混凝土),研究了其对5种常见径流重金属(Cu、Zn、Cd、Mn、Ni)的去除效能和机制,并分析了不同降雨重现期(2,3,5年)对透水铺装系统去除径流重金属的影响。结果表明:3种透水铺装系统对5种径流重金属都有较好去除效果,其中陶瓷透水砖的去除效果最好,且去除效果最稳定。比较而言,陶瓷透水砖与透水沥青能够在短时间内降低重金属的浓度,透水混凝土达到吸附点位的速度较慢并有一定波动,特别是在不同降雨重现期下波动更加明显。在不同重现期下,各设施表现出不同性能,影响程度为2年>5年>3年,即整体在重现期为3年的降雨条件下有着较为优异且较为稳定的去除性能,而过大或过小的流量都会使透水铺装去除重金属的性能有所降低。Abstract: This paper studied the removal efficiency and mechanism of heavy metals on different types of permeable pavement systems in runoff water. Three typical permeable pavement systems (ceramic permeable bricks, permeable asphalt, and permeable concrete) were set up in the laboratory, and the removal efficiency and mechanism of five common runoff heavy metals (Cu, Zn, Cd, Mn, Ni) were studied. Furthermore, the effects of rainfall recurrence periods (2 a, 3 a, 5 a) were analyzed. The results showed that the three permeable paving systems had good removal efficiencies on all five heavy metals, and compared with permeable asphalt and permeable concrete, ceramic permeable brick showed the best removal and stable removal efficiency. Ceramic permeable bricks and permeable asphalt could reduce the concentration of heavy metals in a shorter time, but the speed of permeable concrete reaching the adsorption point was slower and the effluent concentration was more unstable especially under different rainfall recurrence periods. Different permeable pavement systems exhibited different performance under different rainfall recurrence periods, with an impact degree sequence of 2 a>5 a>3 a. This result showed that permeable pavement systems had excellent and stable removal performance under the rainfall condition of 3 a, while a too large or too small flow rate would reduce the removal efficiency of heavy metal removal.
-
Key words:
- permeable pavement /
- heavy metal /
- road runoff /
- low-impact development /
- non-point source pollution
-
[1] 王俊岭, 张亚琦, 秦全城,等.一种新型透水铺装对雨水径流污染物的去除试验研究[J]. 安全与环境学报, 2019, 19(2):643-652. [2] 韩天宇, 宋璐逸, 潘尚昆,等.透水铺装控制和净化地表径流的研究进展[J]. 建筑节能, 2019,47(6):98-101. [3] OSTROM T K, DAVIS A P. Evaluation of an enhanced treatment media and permeable pavement base to remove stormwater nitrogen, phosphorus, and metals under simulated rainfall[J]. Water Research, 2019, 166:115071. [4] 李志霏. 不同类型透水铺装系统对径流雨水控污效能及其机制研究[D]. 北京:北京建筑大学, 2018. [5] BRASWELL A S, WINSTON R J, HUNT W F. Hydrologic and water quality performance of permeable pavement with internal water storage over a clay soil in Durham, North Carolina[J]. Journal of Environmental Management, 2018, 224:277-287. [6] 车伍, 赵杨, 李俊奇,等. 海绵城市建设指南解读之基本概念与综合目标[J]. 中国给水排水, 2015,31(8):1-5. [7] 施周, 贺维鹏. 饮用水水源中重金属污染防控技术与对策[J]. 给水排水, 2012,48(8):1-3,94. [8] DAVIS B, BIRCH G. Comparison of heavy metal loads in stormwater runoff from major and minor urban roads using pollutant yield rating curves[J]. Environmental Pollution, 2010,158(8):2541-2545. [9] 赵永锟.透水人行道设计在海绵城市建设的应用[J].中外企业家,2019(19):107. [10] 王瑾.海绵城市背景下北方老城区透水铺装的应用[J].工程建设与设计,2020(2):43-44. [11] 刘萌,王飞,李楠.透水铺装在小区建设中的应用[J].现代物业(中旬刊),2019(7):75. [12] 王俊岭,王雪明,张安,等. 基于"海绵城市"理念的透水铺装系统的研究进展[J]. 环境工程,2015,33(12):1-4,110. [13] 赵亮. 城市透水铺装材料与结构设计研究[D].西安:长安大学,2010. [14] 章泽宇,骆辉,荆肇乾. 透水沥青路面净化雨水径流的研究进展[J]. 应用化工,2019,48(7):1710-1714,1719. [15] 李海燕,胡磊,王崇臣. 道路雨水径流重金属含量测定[J].环境化学,2009,28(1):145-146. [16] 任伯帜,马宏璞,郑谐,等. 锰矿区雨水径流中重金属含量及污染水平的空间结构特征[J]. 环境科学学报,2014,34(7):1730-1737. [17] 北京市规划和国土资源委员会.城镇雨水系统规划设计暴雨径流计算标准:DB11/T 969-2016[S].北京:北京建筑科技促进会,2016:4-5. [18] 张磊, 李传, 阙国和. 石油沥青质的吸附行为:Ⅰ吸附机理及研究方法[J]. 石油沥青, 2007,21(5):23-28. [19] 赵曜. 透水性沥青路面对路面径流中重金属的控制机理研究[D].南京:南京林业大学,2014. [20] 余太平.陶瓷透水砖对工业园区重金属的吸附[J]. 建材与装饰, 2018(45):181. [21] ZHANG K F, YONG F, MCCARTHY D T, et al. Predicting long term removal of heavy metals from porous pavements for stormwater treatment[J]. Water Research, 2018,142:236-245.
点击查看大图
计量
- 文章访问数: 216
- HTML全文浏览量: 31
- PDF下载量: 4
- 被引次数: 0