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Persistent Problem: Global Challenges to Managing PCBs.

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Most countries are failing to manage Polychlorinated biphenyls (PCBs) waste by the 2028 deadline. Urgent action is needed to address remaining PCB stocks and prevent future pollution from similar chemicals.

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Area of Science:

  • Environmental Science
  • Environmental Chemistry
  • Chemical Engineering

Background:

  • Polychlorinated biphenyls (PCBs) are persistent organic pollutants (POPs) subject to global management under the Stockholm Convention.
  • The convention mandates environmentally sound management (ESM) of PCBs by 2028, with significant challenges in global compliance.
  • Over 10 million tonnes of PCB-containing materials remain, disproportionately in nations with limited waste management capacity.

Purpose of the Study:

  • To assess global progress towards the 2028 deadline for environmentally sound management of PCBs.
  • To compare PCB management strategies and outcomes in countries party to the Stockholm Convention versus non-parties.
  • To highlight challenges in PCB waste management and advocate for proactive management of emerging POPs.

Main Methods:

  • Analysis of global PCB stock data and national management progress reports.
  • Comparative assessment of PCB reduction efforts in selected countries (Canada, Czechia, USA).
  • Review of compliance with Stockholm Convention mandates for PCB ESM.

Main Results:

  • Less than 30% of countries are on track to meet the 2028 PCB ESM goal.
  • Canada and Czechia show significant progress (99% PCB reduction), nearing the goal.
  • The USA, not a signatory, has a large, poorly inventoried PCB stock with minimal reduction (∼3% since 2006).

Conclusions:

  • Global PCB management faces significant hurdles due to low compliance and capacity limitations in many countries.
  • The slow progress underscores the need for enhanced international cooperation and support for PCB waste management.
  • Failure to address current PCB stocks necessitates prioritizing the reduction of newer POPs like chlorinated paraffins and PFAS to prevent future environmental crises.