AI Article Synopsis
- PCBs and OCPs are persistent chemicals found in the Arctic environment, influenced by geochemical cycles, and their behaviors have been studied in various research projects.
- Despite their historical presence, the concentrations of these chemicals are generally decreasing over time, showing no significant ecological risk in soil or sediment when compared to set standards.
- However, certain chemicals like DDT and HCB showed increased concentrations with higher trophic levels, indicating a need for more research on the long-term impacts of these contaminants.
Article Abstract
Polychlorinated Biphenyls (PCBs) and Organochlorinated Pesticides (OCPs) are 'trapped' in a variety of environmental media and can therefore undergo further processing by geochemical cycles. By reviewing a wide range of research studies, we present and discuss the main progresses that affect legacy contaminants, such as migration and transformation processes, biological effects assessment across all Arctic media. PCBs and OCPs demonstrated an overall decreasing concentration trend over time in the Arctic. Ecological risk assessment was undertaken by comparison with two standards, suggesting that there was no ecological risk in either soil or sediment. The concentrations of HCB, ΣHCHs, ΣDDTs, chlordane, mirex, and ΣPCBs increased with trophic levels (TLs), showing a significant linear correlation (P < 0.001). The calculated trophic magnification factors (TMFs) values ranged from 0.0004 to 26.63, among which DDTs had the highest value. Future research need to focus on the long-term fate of PCBs and OCPs.
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| http://dx.doi.org/10.1016/j.marpolbul.2024.117042 | DOI Listing |
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