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http://dx.doi.org/10.15681/KSWE.2021.37.4.286

Analysis of Characteristics and Removal Efficiency of Road-deposited Sediment on Highway by Road Sweeping According to Particle Size Distribution  

Kang, Heeman (Korea Expressway Corporation Research Institute)
Kim, Hwang Hee (CONTECH ENG Co., Ltd.)
Jeon, Ji-Hong (Department of Environmental Engineering, Andong National University)
Publication Information
Journal of Korean Society on Water Environment / v.37, no.4, 2021 , pp. 286-295 More about this Journal
Abstract
The removal efficiency of road-deposited sediment (SDR) by road sweeping was analyzed by performing particle size analysis before and after road sweeping at four highways during May to December 2019. The SDR accounted for the largest proportion in the range of 250 to 850 ㎛ and the degree of its proportion had an effect on the particle size distribution curve. The particle size distribution of the collected sediments showed a similar distribution at all sites. Below 75 ㎛, the removal efficiency of SDR showed a constant value around 40%, but above 75 ㎛, it increased as the particle size increased. The removal efficiency was 82-90% (average 86%) for gravel, 66-93% (average 79%) for coarse sand, 35-92% (average 64%) for fine sand, 29-69% (average 44%) for very fine sand, 19-58% (average 40%) for silt loading, 10-59% (average 40%) for TSP, 13-57% (average 40%) for PM10, and 15-61% (average 38%) for PM2.5. SDR removal efficiency showed an average of 69% for the four highways. It was found that if the amount of SDR was less than 100 g/m2, it was affected by the road surface condition and had a large regional deviation. As such, the amount of SDR and the removal efficiency increased. The fine particles, which have relatively low removal efficiency, contained a large amount of pollutants, which is an important factor in water and air pollution. Therefore, various measures to improve the removal efficiency of fine particles in SDR by road sweeping are needed.
Keywords
Highway; Particle size distribution; Road-deposited sediment (SDR); Road sweeping;
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Times Cited By KSCI : 1  (Citation Analysis)
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