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Related Concept Videos

Flow Table Test01:12

Flow Table Test

276
The flow table test is an established method used to assess the workability of concrete, particularly useful for evaluating highly flowable concrete mixes. This test employs an apparatus that consists of a wooden board topped with a steel plate, collectively weighing 35 pounds. The board is connected to a base via a hinge and measures 27.6 inches on each side.
Concrete is placed within a truncated cone mold that is 8 inches high with an 8-inch base diameter and a 5-inch top diameter. The...
276

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An End-of-Life Plastic and Additive Flow Tracker Tool for Scenario Forecasting.

John D Chea1, Matthew Conway2, Gerardo J Ruiz-Mercado1,3

  • 1Office of Research & Development, US Environmental Protection Agency, Cincinnati, Ohio 45268, United States.

Industrial & Engineering Chemistry Research
|July 8, 2025
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Summary
This summary is machine-generated.

This study introduces a tool to track plastic waste and chemical additives, aiding policymakers in managing end-of-life plastics for a safer circular economy. It helps assess environmental and health impacts, promoting sustainable plastic management.

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Area of Science:

  • Environmental Science
  • Chemical Engineering
  • Public Policy

Background:

  • Plastic's widespread use leads to environmental and health risks from hazardous additives released at end-of-life (EoL).
  • Effective EoL plastic management is vital for a sustainable circular economy (CE), yet often overlooks chemical additives.
  • Increasing plastic demand exacerbates EoL challenges, necessitating better tools for policymakers and stakeholders.

Purpose of the Study:

  • To develop a Python-based tool (EoLPAFT) for tracking plastic and additive flows at EoL.
  • To support decision-makers in analyzing the impacts of plastic CE management solutions, including chemical additives.
  • To assess occupational exposure scenarios and environmental releases associated with EoL plastics.

Main Methods:

  • Development of a Python-based End-of-Life Plastic and Additive Flow Tracker (EoLPAFT).
  • Integration of chemical additive content and release data into EoL plastic management analysis.
  • Testing the tool with hypothetical scenarios: extended producer responsibility (EPR) and maintaining a CE for plastics.

Main Results:

  • The EoLPAFT tool enables holistic impact assessment of various plastic EoL management strategies.
  • Analysis of hypothetical scenarios projected long-term outcomes for EPR and CE models.
  • Demonstrated the importance of considering chemical additives in plastic CE strategies.

Conclusions:

  • Chemical additives are critical factors in EoL plastic management and CE strategies.
  • The EoLPAFT tool provides valuable insights for minimizing environmental, health, and economic impacts of plastic pollution.
  • Informed decision-making is essential for achieving a safer and more sustainable circular economy for plastics.