Jeong Hyeryeong, Ra Kongtae
Ifremer, RBE/CCEM, F-44000 Nantes, France; Marine Environmental Research Center, Korea Institute of Ocean Science and Technology (KIOST), Busan 49111, Republic of Korea.
Marine 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.
Mar Pollut Bull. 2023 Mar;188:114596. doi: 10.1016/j.marpolbul.2023.114596. Epub 2023 Jan 25.
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.
本研究首次调查了萨摩亚阿皮亚沿海、河流/溪流及道路沉积物（RDS）中重金属的污染情况及生态风险。沉积物样本中铬（Cr）和镍（Ni）的浓度高于其他金属。河流沉积物和道路沉积物在密集商业区附近具有相对较高的富集系数（EF）值，铜（Cu）、锌（Zn）、镉（Cd）和铅（Pb）有中度至显著富集。结果表明，铬和镍源自火山母质的自然来源，而铜、锌、镉和铅则源于人为活动，如交通排放和城市污水排放。污染和生态风险评估显示，河流附近的沿海沉积物受到人为污染，并呈现中度生态风险。本研究表明，积聚在城市不透水层和河流/溪床中的金属已通过径流流入沿海环境。
