Pollution and ecological risk assessments for heavy metals in coastal, river, and road-deposited sediments from Apia City in Upolu Island, Samoa

Type Article
Date 2023-03
Language English
Author(s) Jeong Hyeryeong1, 2, Ra Kongtae2, 3
Affiliation(s) 1 : Ifremer, RBE/CCEM, F-44000 Nantes, France
2 : Marine Environmental Research Center, Korea Institute of Ocean Science and Technology (KIOST), Busan 49111, Republic of Korea
3 : Department of Ocean Science (Oceanography), KIOST School, University of Science and Technology (UST), Daejeon 34113, Republic of Korea
Source Marine Pollution Bulletin (0025-326X) (Elsevier BV), 2023-03 , Vol. 188 , P. 114596 (10p.)
DOI 10.1016/j.marpolbul.2023.114596
WOS© Times Cited 9
Keyword(s) Metal pollution, Coastal environment, Runoff, Enrichment factor, Pollution load index, Potential ecological risk index

This study was the first to investigate the pollution and ecological risks of heavy metals in coastal, river/stream and road-deposited sediments (RDS) from Apia in Samoa. Cr and Ni concentrations in sediment samples were higher than those of other metals. River sediments and RDS had relatively high EF values around the intensive commercial areas, with a moderate to significant enrichment of Cu, Zn, Cd, and Pb. The results indicate that Cr and Ni have a natural origin from volcanic parent materials, while Cu, Zn, Cd, and Pb originated from anthropogenic activities, such as traffic emissions and the discharge of municipal wastewater. The assessments of pollution and ecological risk revealed that coastal sediments adjacent to the river are anthropogenically contaminated and present a moderate ecological risk. This study demonstrates that metals that have accumulated in the urban impermeable layer and river/stream bed have flowed into the coastal environment through runoff.

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