Hyeryeong JEONG, Environmental Research Center, Korea Institute of Ocean Science and Technology (KIOST), Busan, 49111, Republic of Korea; Department of Ocean Science (Oceanography), KIOST School, University of Science and Technology (UST), Daejeon, 34113, Republic of Korea

Jin Young CHOI, Environmental Research Center, Korea Institute of Ocean Science and Technology (KIOST), Busan, 49111, Republic of Korea

Kongtae RA, Environmental Research Center, Korea Institute of Ocean Science and Technology (KIOST), Busan, 49111, Republic of Korea; Department of Ocean Science (Oceanography), KIOST School, University of Science and Technology (UST), Daejeon, 34113, Republic of Korea

Abstract
Study on potentially toxic elements (PTEs; Cr, Ni, Cu, Zn, As, Cd, Sb, Pb and Hg) combined with Pb isotopes was conducted to evaluate the pollution status and to identify the sources of PTEs pollution in road-deposited sediments (RDS), soils and stream sediments in small watershed of Busan, Korea. Our results indicate that RDS was moderately to extremely polluted in Cu, Zn, Cd, Sb and Pb and highly polluted in sampling site with high traffic activity. According to the Igeo results, the Sb pollution caused by automobile brake pads was higher than that of other elements. Cd and Sb in RDS pose a serous ecological risk. The pollution degree of PTEs was in the order: RDS>stream sediment>soil. Pb isotopes of RDS of this study was clearly distinguished from the industrial region. In urban areas, traffic activities were found to have a larger contribution to PTEs pollution in RDS. 206Pb/207Pb ratio showed the lowest value in RDS and increased in the order of stream sediments and soils. In particular, the results of biplot between Pb isotope and Zu/Cu ratio showed that it was possible to distinguish between industrial and traffic activities. Our results indicate that RDS is one of the main sources of PTEs pollution in stream sediments. Therefore, efficient management, such as RDS cleaning, is very important to reduce PTEs contamination that migrates to the stream environment as a non-point source.

Keywords
potentially toxic elements, road-deposited sediments, soils, stream sediments, pollution

Cite this paper
Hyeryeong JEONG, Jin Young CHOI, Kongtae RA, Source identification for potentially toxic metals using Pb isotopes and elemental ratios of road-deposited sediments, stream sediment, and soil from watershed in Busan, South Korea , SCIREA Journal of Geosciences. Volume 4, Issue 3, June 2020 | PP. 76-98.

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