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From UPSC perspective, the following things are important :
Prelims level: Labrys portucalensis F11
Why in the News?
A research team has discovered that Labrys portucalensis F11, a strain of aerobic bacteria from the Xanthobacteraceae family, can break down and transform multiple types of per- and polyfluoroalkyl substances (PFAS), a group of persistent environmental pollutants.
About Labrys portucalensis F11
- It is a type of bacteria that can break down harmful chemicals known as PFAS (Per- and Polyfluoroalkyl Substances).
- It was first found in contaminated soil at an industrial site in Portugal.
- Scientists have discovered that it can remove fluorine from certain chemical pollutants, making them less toxic.
- PFAS are known as “forever chemicals” because they do not break down easily in nature.
- Labrys portucalensis F11 can digest PFAS, helping to clean up polluted soil and water.
How does it work?
- It attacks the strong chemical bonds in PFAS, removing fluorine atoms.
- It uses carbon from PFAS as food, helping it grow while reducing pollution.
- It survives in oxygen-rich environments, making it ideal for cleaning up industrial waste sites.
- In 100 days, it broke down 90% of PFOS, one of the most harmful PFAS chemicals.
- Unlike most bacteria, it can also break down PFAS leftovers, making them even safer.
Back2Basics: Per- and Polyfluoroalkyl Substances (PFAS)
- Per- and Polyfluoroalkyl Substances (PFAS) are a group of synthetic chemicals widely used in industrial and consumer products for their waterproof, grease-resistant, and non-stick properties.
- They are often called “forever chemicals” because they do not break down easily in the environment or human body.
- PFAS are commonly found in non-stick cookware (Teflon), waterproof clothing, food packaging, fire-fighting foams, and industrial applications.
- These chemicals are known for their high resistance to heat, water, and oil, making them useful but also environmentally persistent.
- Common Uses:
- Non-stick cookware (Teflon), waterproof fabrics, stain-resistant coatings, and fire-fighting foams.
- Industrial applications such as metal plating, food packaging, and electronics manufacturing.
- Environmental and Health Concerns:
- PFAS are often called “forever chemicals” because they do not naturally degrade and persist in soil, water, and living organisms.
- Exposure to PFAS has been linked to cancer, liver damage, immune system disruption, and hormonal imbalances.
- Regulatory Actions:
- In 2023, the U.S. Environmental Protection Agency (EPA) designated PFOS (a type of PFAS) as a hazardous substance, requiring strict monitoring and clean-up efforts.
- Governments worldwide are phasing out PFAS use and funding research into bioremediation technologies like the F11 bacteria-based clean-up approach.
- In 2020, the Bureau of Indian Standards (BIS) adopted international criteria for sampling and testing certain PFAS compounds, such as perfluorooctanoic acid (PFOA) and perfluorooctane sulfonate (PFOS).
- However, comprehensive policies to regulate or ban PFAS are still lacking.
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PYQ:
[2013] Which of the following can be found as pollutants in the drinking water in some parts of India?
- Arsenic
- Sorbitol
- Fluoride
- Formaldehyde
- Uranium
Select the correct answer using the codes given below:
(a) 1 and 3 only
(b) 2, 4 and 5 only
(c) 1, 3 and 5 only
(d) 1, 2, 3, 4 and 5 |
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