Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Emission Spectra02:39

Emission Spectra

75.9K
When solids, liquids, or condensed gases are heated sufficiently, they radiate some of the excess energy as light. Photons produced in this manner have a range of energies, and thereby produce a continuous spectrum in which an unbroken series of wavelengths is present.
75.9K
Deleterious Substances in Aggregate01:25

Deleterious Substances in Aggregate

540
Deleterious substances in aggregates can be detrimental to the quality and durability of concrete. These substances include organic impurities like loam, which interfere with cement hydration and are usually present in the sand. These prevent a good bond between aggregate and cement paste. Organic impurities can be detected using the colorimetric test, where the darkness of a solution after agitation indicates the level of organic content.
Another type of impurity is clay and fine material that...
540
Substance Use Disorders Affecting Sleep01:24

Substance Use Disorders Affecting Sleep

411
Substance use disorders involve a pattern of using drugs more extensively than intended and continuing use despite harmful consequences. This includes legal substances like alcohol and nicotine, as well as illegal drugs. These disorders often involve both physical and psychological dependence, reflecting compulsive use of substances that significantly alter thoughts, feelings, and behaviors, contributing to a major public health issue.
Understanding the concepts of physical dependence,...
411
Connective Tissue Fibers and Ground Substance01:17

Connective Tissue Fibers and Ground Substance

14.3K
One of the significant functions of connective tissue is connecting tissues and organs. Unlike epithelial tissue that is composed of cells closely packed with little or no extracellular space in between, connective tissue cells are dispersed in a matrix. The matrix usually includes a large amount of extracellular material produced by the connective tissue cells that are embedded within it. It plays a significant role in the functioning of this tissue. The major component of the matrix is a...
14.3K
Positron Emission Tomography01:29

Positron Emission Tomography

7.0K
Positron emission tomography (PET) is a medical imaging technique involving radiopharmaceuticals — substances that emit short-lived radiation. Although the first PET scanner was introduced in 1961, it took 15 more years before radiopharmaceuticals were combined with the technique and revolutionized its potential.
One of the main requirements of a PET scan is a positron-emitting radioisotope, which is produced in a cyclotron and then attached to a substance used by the part of the body...
7.0K
Atomic Emission Spectroscopy: Lab01:29

Atomic Emission Spectroscopy: Lab

604
AES is a powerful analytical technique, especially effective when used with plasma sources, producing abundant spectra in characteristic emission lines. The Inductively Coupled Plasma (ICP), in particular, yields superior quantitative analytical data due to its high stability, low noise, low background, and minimal interferences under optimal experimental conditions. However, newer air-operated microwave sources are emerging as promising alternatives that could be more cost-effective than...
604
  1. Home
  3. Research Domains
  5. Engineering
  7. Environmental Engineering
  9. Air Pollution Modelling And Control
  11. Comprehensive Assessment Of Poly- And Perfluoroalkyl Substances In China: Flows, Stocks, And Emissions From Polytetrafluoroethylene.
  1. Home
  3. Research Domains
  5. Engineering
  7. Environmental Engineering
  9. Air Pollution Modelling And Control
  11. Comprehensive Assessment Of Poly- And Perfluoroalkyl Substances In China: Flows, Stocks, And Emissions From Polytetrafluoroethylene.

Related Experiment Video

Design and Use of a Full Flow Sampling System FFS for the Quantification of Methane Emissions
08:18

Design and Use of a Full Flow Sampling System FFS for the Quantification of Methane Emissions

Published on: June 12, 2016

17.3K

Comprehensive Assessment of Poly- and Perfluoroalkyl Substances in China: Flows, Stocks, and Emissions from Polytetrafluoroethylene.

Xinyue Zhou1, Xue Zhao2, Tianyu Chen1

  • 1State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.

Environmental Science & Technology
|January 24, 2026

View abstract on PubMed

Summary
This summary is machine-generated.

This study assesses polytetrafluoroethylene (PTFE)-associated per- and polyfluoroalkyl substances (PFAS) in China. Production-phase controls are key to managing PFAS emissions and driving regulatory-induced shifts to emerging substances.

Keywords:
life cycle assessment (LCA)material flow analysis (MFA)perfluorooctanoic acid (PFOA)poly and perfluoroalkyl substances (PFAS)

More Related Videos

Assessment of the Cytotoxic and Immunomodulatory Effects of Substances in Human Precision-cut Lung Slices
12:04

Assessment of the Cytotoxic and Immunomodulatory Effects of Substances in Human Precision-cut Lung Slices

Published on: May 9, 2018

14.6K
Polytetrafluoroethylene PTFE as a Suture Material in Tendon Surgery
09:13

Polytetrafluoroethylene PTFE as a Suture Material in Tendon Surgery

Published on: October 6, 2022

4.0K

Related Experiment Videos

Design and Use of a Full Flow Sampling System FFS for the Quantification of Methane Emissions
08:18

Design and Use of a Full Flow Sampling System FFS for the Quantification of Methane Emissions

Published on: June 12, 2016

17.3K
Assessment of the Cytotoxic and Immunomodulatory Effects of Substances in Human Precision-cut Lung Slices
12:04

Assessment of the Cytotoxic and Immunomodulatory Effects of Substances in Human Precision-cut Lung Slices

Published on: May 9, 2018

14.6K
Polytetrafluoroethylene PTFE as a Suture Material in Tendon Surgery
09:13

Polytetrafluoroethylene PTFE as a Suture Material in Tendon Surgery

Published on: October 6, 2022

4.0K

Area of Science:

  • Environmental Science
  • Chemical Engineering
  • Materials Science

Background:

  • Polytetrafluoroethylene (PTFE) is a major source of environmental per- and polyfluoroalkyl substances (PFAS).
  • Understanding PFAS flows and emissions throughout the PTFE lifecycle is crucial for environmental management.
  • China's regulatory landscape is evolving concerning PFAS substances.

Purpose of the Study:

  • To conduct a comprehensive life cycle assessment of PTFE-associated nonpolymeric PFAS in China.
  • To quantify nonpolymeric PFAS flows, stocks, and emissions from 2020 to 2050.
  • To analyze the impact of regulatory policies on PFAS composition shifts.

Main Methods:

  • Dynamic material flow analysis was employed to model PFAS across all PTFE life stages.
polytetrafluoroethylene (PTFE)
  • Quantification of nonpolymeric PFAS flows, stocks, and emissions.
  • Assessment of regulatory policy impacts on PFAS compositional changes.

    • Main Results:

    • Significant growth in total nonpolymeric PFAS flows observed in 2023, with PTFE production being the primary source (95.5%).
    • In-use perfluorooctanoic acid (PFOA) stocks surged and are projected to decrease by 76.5% by 2050, aligning with regulatory phase-out measures.
    • Emerging PFAS are projected to dominate over legacy perfluoroalkyl acids (PFAAs) by 2050, indicating a significant compositional transformation.

    Conclusions:

    • PTFE production is a critical control point for managing nonpolymeric PFAS emissions.
    • Regulatory policies are effectively driving a shift from legacy to emerging PFAS.
    • This study provides essential insights for PFAS management in China, highlighting the importance of production-phase interventions.