INFLUENCING MECHANISM OF PERMEABLE PAVEMENT TYPE ON REMOVAL EFFICIENCY OF HEAVY METALS FROM RUNOFF

ZHANG Zi-yang; QI Hao; ZHANG Xiao-ran; LI Hai-yan

doi:10.13205/j.hjgc.202102007

Volume 39 Issue 2

Jul. 2021

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ZHANG Zi-yang, QI Hao, ZHANG Xiao-ran, LI Hai-yan. INFLUENCING MECHANISM OF PERMEABLE PAVEMENT TYPE ON REMOVAL EFFICIENCY OF HEAVY METALS FROM RUNOFF[J]. ENVIRONMENTAL ENGINEERING , 2021, 39(2): 41-46,88. doi: 10.13205/j.hjgc.202102007

Citation:

ZHANG Zi-yang, QI Hao, ZHANG Xiao-ran, LI Hai-yan. INFLUENCING MECHANISM OF PERMEABLE PAVEMENT TYPE ON REMOVAL EFFICIENCY OF HEAVY METALS FROM RUNOFF[J]. ENVIRONMENTAL ENGINEERING , 2021, 39(2): 41-46,88. doi: 10.13205/j.hjgc.202102007

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INFLUENCING MECHANISM OF PERMEABLE PAVEMENT TYPE ON REMOVAL EFFICIENCY OF HEAVY METALS FROM RUNOFF

doi: 10.13205/j.hjgc.202102007

1. Engineering Research Center of Sustainable Urban Sewage System Construction and Risk Control, Beijing University of Civil Engineering and Architecture, Beijing 102616, China;
2. Key Laboratory of Urban Stormwater System and Water Environment, Ministry of Education, Beijing University of Civil Engineering and Architecture, Beijing 102616, China

Received Date: 2020-03-10
Available Online: 2021-07-19

Abstract

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.
- permeable pavement,
- heavy metal,
- road runoff,
- low-impact development,
- non-point source pollution

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References(21)

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