Kim, Youngnam;Hong, Seongjin;Lee, Junghyun;Yoon, Seo Joon;An, Yoonyoung;Kim, Min-Seob;Jeong, Hee-Dong;Khim, Jong Seong published 《Spatial distribution and source identification of traditional and emerging persistent toxic substances in the offshore sediment of South Korea》 in 2021. The article was appeared in 《Science of the Total Environment》. They have made some progress in their research.Quality Control of 4-tert-Octylphenol The article mentions the following:
While the coastal pollution of persistent toxic substances has been widely documented, information on offshore environments remains limited. Here, we investigated the spatial distribution and sources of PTSs in the offshore sediments (n = 34) of South Korea. Sediment samples collected from the Yellow Sea (n = 18), the South Sea (n = 10), and the East Sea (n = 6), in 2017-18 were analyzed for a total of 71 PTSs. Low-chlorinated PCBs (tri- and tetra Cl-CBs) were predominant (mean: 77%), primarily indicating atm. inputs. PAHs widely accumulated in the three seas with low to moderate level (22-250 ng g-1 OC), and dominated by high mol. weight PAHs (4-6 rings). PMF anal. revealed coast-specific PAHs sources; i.e., originated from mainly coke production (77%) in the Yellow Sea, vehicle emissions (68%) in the South Sea, and fossil fuel combustion (49%) in the East Sea. SOs showed significant contamination than other PTSs, with elevated concentrations in the Yellow Sea (mean: 350 ng g-1 OC). APs showed a similar regional distribution to SOs, but concentrations were much lower (mean: 17 ng g-1 OC). SOs and APs seemed to be introduced from rivers and estuaries on the west coast of Korea, where industrial and municipal activities are concentrated, then might be transported to offshore through tide or currents. Overall, the novel data presented for various PTSs in offshore Korean sediments warrant the necessity of a long-term monitoring effort and urgent management practice to protect marine ecosystem.4-tert-Octylphenol (cas: 140-66-9) were involved in the experimental procedure.
4-tert-Octylphenol(cas: 140-66-9) is a common environmental pollutant showing weak estrogenic effects.Quality Control of 4-tert-Octylphenol It has been shown to cause harm to vertebrate male reproductive systems.
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