Plastic pollution, specifically microplastics, are a major contributor of PCBs into the biosphere and especially into marine environments. PCBs concentrate in marine environments because freshwater systems, like rivers, act as a bridge for plastic pollution to be transported from terrestrial environments into marine environments. [ 45 ]

6 天之前 · Learn more about iPCBs, including the regulatory context, EPA enforcement, iPCBs in the environment, ongoing research conducted by the EPA, and pollution prevention efforts. Although no longer commercially produced in the United States, PCBs may be present in products and materials produced before the 1979 PCB ban.

2024年6月16日 · PCBs, or polychlorinated biphenyls, are industrial products or chemicals. PCB contamination is high in the Housatonic River and New Bedford Harbor in Massachusetts. According to the EPA, PCBs belong to a broad family of human-created organic chemicals known as chlorinated hydrocarbons.

2024年12月4日 · PCBs, or polychlorinated biphenyls, are a group of POPs, toxic, man-made, hazardous organic chemicals that have dangerous effects on the environment and our health. PCBs persist in the environment for long periods and can travel over great distances through air, water and migratory species across international boundaries.

2022年1月20日 · The unintentionally produced PCBs (UP-PCBs) formed during industrial thermal processes may play an increasingly significant role in PCB pollution in China. Low PCB levels were recorded in rural and underdeveloped districts, particularly in remote and high-altitude localities such as the Tibetan Plateau and the South China Sea.

2018年9月28日 · Using an individual-based model framework and globally available data on PCB concentrations in killer whale tissues, we show that PCB-mediated effects on reproduction and immune function threaten the long-term viability of >50% of the world’s killer whale populations.

Polychlorinated biphenyls (PCBs) were widely used in industrial and commercial applications, until they were banned in the late 1970s as a result of their significant environmental pollution. PCBs in the environment gained scientific interest because of their persistence and the potential threats they pose to humans.

2024年3月21日 · Levels of toxic polychlorinated biphenyls (PCBs) released into the environment could be higher now than they were during peak production in the 1970s. Despite being banned for over 40 years, new estimates suggest that significant amounts of these carcinogenic chemicals are inadvertently being formed as byproducts of other chemical processes.

2025年2月10日 · What are PCBs? Health effects of PCBs; PCB laws and regulations; 2023 PCB Final Rulemaking; Policy and guidance for PCB issues; Benefits of the PCB Cleanup and Disposal Program; Inadvertent PCBs

Upstream, pollution prevention solutions and viable alternatives to iPCB-containing products will reduce the generation of iPCBs and help protect human health and the environment.