title: Historical trend in heavy metal pollution in core sediments from the Masan Bay, Korea.
abstract: The spatiotemporal distribution and their mass accumulation rate (MAR) of heavy metals were investigated to evaluate the time-dependent historical trends of heavy metal concentration. The three short cores used for this study were collected from the catchment area (MS-PC5, 60cm length), the central part (MS-PC4, 40cm length) and the offshore (MS-PC2, 60cm length) of the Masan Bay, Korea. The concentration of heavy metals (Co, Ni, Cu, Zn, Cr and Pb) in catchment area is as much as 1.5-2 times higher than central part of the Bay, and about 2 times higher than offshore area approximately. In particular, MAR of metals (Cu, Zn and Pb) show clear spatiotemporal variation, so that MAR's of heavy metal may provide more accurate information in evaluating the degree of pollution. Temporally, the heavy metal concentration had been increased since the late 1970s, but it seems to decrease again since the 2004yr in catchment area. This may came from concentrated efforts for the government to reduce industrial waste release.
authors: Maritime Security Research Center, Korea Institute of Ocean Science and Technology (KIOST), 787 Hean-ro Ansan, 426-744, South Korea. Electronic address: jcho@kiost.ac.
authors: Jinhyung
authors: J
authors: Cho
authors: Marine Geology and Geophysics Division, KIOST, 787 Hean-ro Ansan, 426-744, South Korea. Electronic address: smhyun@kiost.ac.
authors: Sangmin
authors: S
authors: Hyun
authors: Korea Basic Science Institute (KBSI), 169-148 Gwahak-ro, Yuseong-gu, Daejeon 305-806, South Korea. Electronic address: hanjh@kbsi.re.kr.
authors: J-H
authors: JH
authors: Han
authors: Neo Environmental Business Co. (NeoEnBiz), A-1306 Dodang-dong, Wonmi-gu, Gyeonggi-do 175-209, South Korea. Electronic address: shkim@neoenbiz.com.
authors: Suhyun
authors: S
authors: Kim
authors: Maritime Security Research Center, Korea Institute of Ocean Science and Technology (KIOST), 787 Hean-ro Ansan, 426-744, South Korea. Electronic address: dhshin@kiost.ac.
authors: Dong-Hyeok
authors: DH
authors: Shin
mesh_terms: D061006:Bays; D004784:Environmental Monitoring / Q000379:methods; D019015:Geologic Sediments / Q000032:analysis*; D019216:Metals, Heavy / Q000032:analysis*; D056910:Republic of Korea; D062211:Spatio-Temporal Analysis; D014874:Water Pollutants, Chemical / Q000032:analysis*
chemical_list: D019216:Metals, Heavy; D014874:Water Pollutants, Chemical
keywords: Heavy metal; Historical trend; Masan Bay; PCA; Pollution