Plasticizers Degradation
Summary
*Source: TH* **Context: **Researchers at IIT Roorkee have developed a groundbreaking method to degrade plasticizers, specifically **diethyl hexyl phthalate (DEHP)**, using bacterial enzymes. **About plasticizers degradation using bacterial enzymes:** • **What it is:** A method using bacterial enzymes to break down high molecular weight plasticizers like DEHP, commonly found in plastics and personal care products. • **Bacterial enzyme involved:** **Esterase enzyme** from **Sulfobacillus acidop
Exam Brief
GS-3IIT Roorkee developed a method using bacterial enzymes to degrade plasticizers like DEHP. This offers a sustainable solution to reduce plastic pollution. UPSC focuses on environmental pollution.
Key Facts
- Diethyl hexyl phthalate (DEHP) is a target plasticizer.
- Esterase enzyme from Sulfobacillus acidophilus is used.
- Comamonas testosteroni enzymes convert byproducts to water and CO2.
- The process breaks down DEHP into MEHP and 2-ethyl hexanol.
- Researchers aim to integrate five enzyme genes into bacteria.
Prelims — What UPSC Might Ask
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Source Article Content
Source: TH
**Context: **Researchers at IIT Roorkee have developed a groundbreaking method to degrade plasticizers, specifically diethyl hexyl phthalate (DEHP), using bacterial enzymes.
About plasticizers degradation using bacterial enzymes:
• What it is: A method using bacterial enzymes to break down high molecular weight plasticizers like DEHP, commonly found in plastics and personal care products. • Bacterial enzyme involved: Esterase enzyme from Sulfobacillus acidophilus for degrading DEHP into less harmful byproducts. Additional enzymes from Comamonas testosteroni for complete conversion into water and carbon dioxide. • Esterase enzyme from Sulfobacillus acidophilus for degrading DEHP into less harmful byproducts. • Additional enzymes from Comamonas testosteroni for complete conversion into water and carbon dioxide. • How it works: Step 1: DEHP is broken down into mono-(2-ethylhexyl) phthalate (MEHP) and 2-ethyl hexanol using the esterase enzyme. Step 2: Sequential enzymes convert MEHP to phthalate, then to intermediate compounds, ultimately producing water and carbon dioxide via bacterial metabolic pathways. Gene Integration: Researchers aim to integrate all five enzyme genes into bacteria to enhance degradation efficiency. • Step 1: DEHP is broken down into mono-(2-ethylhexyl) phthalate (MEHP) and 2-ethyl hexanol using the esterase enzyme. • Step 2: Sequential enzymes convert MEHP to phthalate, then to intermediate compounds, ultimately producing water and carbon dioxide via bacterial metabolic pathways. • Gene Integration: Researchers aim to integrate all five enzyme genes into bacteria to enhance degradation efficiency. • Significance: Environmental Impact: Provides a sustainable method to degrade carcinogenic plasticizers. Pollution Control: Reduces plasticizer contamination in water sources. Scalability: Enzyme production on a large scale through E. coli bacteria makes the method feasible for widespread use. Advancement in Biotechnology: Marks progress in enzyme engineering for addressing pressing environmental issues. • Environmental Impact: Provides a sustainable method to degrade carcinogenic plasticizers. • Pollution Control: Reduces plasticizer contamination in water sources. • Scalability: Enzyme production on a large scale through E. coli bacteria makes the method feasible for widespread use. • Advancement in Biotechnology: Marks progress in enzyme engineering for addressing pressing environmental issues. • Limitations: Current Lab Scale: Method is primarily tested in controlled environments; field application needs optimization. Enzyme Stability: Without bacterial integration, enzymes degrade quickly and need frequent replenishment. Time-Intensive Process: Degradation rates could be slow for large-scale applications. • Current Lab Scale: Method is primarily tested in controlled environments; field application needs optimization. • Enzyme Stability: Without bacterial integration, enzymes degrade quickly and need frequent replenishment. • Time-Intensive Process: Degradation rates could be slow for large-scale applications. Insta links:
• Waste-management plastic-waste