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Assessment of Particle Size Distribution and Pollution Impact of Heavy metals in Road-deposited Sediments (RDS) from Shihwa Industrial Complex

  • Journal of Environmental Impact Assessment
  • Abbr : J EIA
  • 2020, 29(1), pp.8-25
  • Publisher : Korean Society Of Environmental Impact Assessment
  • Research Area : Engineering > Environmental Engineering
  • Received : October 7, 2019
  • Accepted : December 22, 2019
  • Published : February 29, 2020

Jihyun Lee 1 Hyeryeong Jeong ORD ID 1 Kongtae Ra ORD ID 1 Jin-Young Choi ORD ID 1

1한국해양과학기술원

Accredited

ABSTRACT

Industrialization has increased the production of road-deposited sediments (RDS) and the level of heavy metals in those RDS, which can have a significant impact on the surrounding aquatic environments through non-point pollution. Although the relationship between contamination characteristics and particle size of RDS is important for pollution control, there is very little information on this. In this study, we investigated the characteristics of grain size distribution and heavy metal concentrations in the road-deposited sediments (RDS) collected from 25 stations in Shihwa Industrial Complex. The environmental impact of RDS with particle size is also studied. Igeo, the contamination assessment index of each metal concentration, represents the RDS from Shihwa Industrial Complex are very highly polluted with Cu, Zn, Pb and Sb, and the levels of those metals were 633~3605, 130~1483, 120~1997, 5.5~50 mg/kg, respectively. The concentrations of heavy metals in RDS increased with the decrease in particle size. The particle size fraction below 250 μm was very dominant with mass and contamination loads, 78.6 and 70.4%, respectively. Particles less than 125 μm of RDS were highly contaminated and toxic to benthic organisms in rivers. RDS particles larger than 250 μm and smaller than 250 μm were contaminated by the surrounding industrial facility and vehicle activities, respectively. As a result of this study, the clean-up of fine particles of RDS, smaller than 125-250 μm, is very important for the control and reduction of nonpoint pollution to nearby water in Shihwa Industrial Complex.

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