Nitrogenative Degradation of Polystyrene Waste

Journal of the American Chemical Society, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 8, 2025

Owing to massive production and poor end-of-life management, plastic waste pollution has become one of the most pressing environmental crises. In response mounting crisis, past several decades have witnessed development numerous methods technologies for recycling. However, current recycling often produce low-quality or low-value products, making it difficult recover operating costs. To this end, we report a novel preoxygenation-induced strategy nitrogenative degradation real-life polystyrene plastics into high-value aromatic nitrogen compounds in cost-effective manner. Thus, expensive highly demanding benzonitrile as well benzamide were obtained up 74% overall isolated yield from by using CuBr catalyst, O2 oxidant, CH3CN source. Detailed mechanistic investigations indicate that hydroxyl radicals activation play role selective aerobic process. Furthermore, multiple reaction pathways contribute formation benzamide.

Language: Английский

---

Tracing the Footprint of Microplastics: Transport Mechanism, Degradation, and Remediation in Marine Environment

Water Air & Soil Pollution, Journal Year: 2025, Volume and Issue: 236(2)

Published: Jan. 24, 2025

Language: Английский

---

Using Insect Larvae and Their Microbiota for Plastic Degradation

Insects, Journal Year: 2025, Volume and Issue: 16(2), P. 165 - 165

Published: Feb. 5, 2025

Plastic pollution is one of the biggest current global threats to environment given that petroleum-based plastic recalcitrant and can stay in for decades, even centuries, depending on specific type. Since less than 10% all made recycled, other solutions (such as incineration or landfill storage) are pollutant methods, new, environmentally friendly needed. In this regard, latest biotechnological discovery topic capability insect larvae use polymers carbon feedstock. This present review describes most relevant information capable degrading plastic, mainly Galleria mellonella (Fabricius, 1798), Tenebrio molitor (Linnaeus, 1758), Zophobas atratus 1776), also adds new about commonly studied “plastivore” insects such termites. covers literature from very first work describing degradation by published 2014 way research available (till June 2024), focusing identification a wide variety plastic-degrading microorganisms isolated guts understanding potential molecular mechanisms take place. It discoveries, which include novel enzymes waxworm saliva.

Language: Английский

---

Novel insights into insect mediated polystyrene biodegradation through bacterial genome analyses

Scientific Reports, Journal Year: 2025, Volume and Issue: 15(1)

Published: Jan. 7, 2025

Abstract Plastic pollution is a significant environmental challenge of contemporary age. Polystyrene (PS), among the most commonly used plastic polymers worldwide, highly durable and difficult to degrade. Despite various disposal strategies, PS continues impact biodiversity, human health, ecosystems. Recently, scientific community has focused on potential role microorganisms for biodegradation, particularly those from gut plastivorous insects. In previous study, three bacterial strains, each representing distinct taxonomic group ( Klebsiella , Pseudomonas Stenotrophomonas ), were isolated Alphitobius diaperinus larvae after rearing diet enriched in medium with as sole carbon source. The sp. strain, here identified S. indicatrix showed greatest degradation. present study investigates genetic profile newly strain DAI2m/c through genome sequencing, identify enzyme-encoding genes involved intracellular metabolic pathways responsible biodegradation styrene monomer. Our findings indicate that encodes all enzymes required one two recognized degradation pathways, suggesting its ability convert into byproducts are then utilized cellular energy production.

Language: Английский

---

Gut microbiota participates in polystyrene microplastics-induced defective implantation through impairing uterine receptivity

Journal of Environmental Management, Journal Year: 2025, Volume and Issue: 380, P. 124997 - 124997

Published: March 17, 2025

Language: Английский

---

Effect of supplemented diet on the kinetic profile of polystyrene biodegradation by Tenebrio molitor larvae: Physical, chemical, thermal, wettability and zeta potential measurements.

Journal of environmental chemical engineering, Journal Year: 2025, Volume and Issue: unknown, P. 116519 - 116519

Published: April 1, 2025

Language: Английский

---

Microbial and Enzymatic Biodegradation of Plastic Waste for a Circular Economy

Applied Sciences, Journal Year: 2024, Volume and Issue: 14(24), P. 11942 - 11942

Published: Dec. 20, 2024

Plastics play a crucial role in modern life, but their accumulation poses serious threat to both the environment and human health. Due effects on terrestrial aquatic environment, it is essential develop sustainable approaches dispose of waste plastics. Traditional methods plastic disposal, such as burning landfilling, are problematic since they produce hazardous byproducts. Biodegradation potentially effective, eco-friendly approach which uses microbial consortia or isolated enzymes break down waste. Enzymes interact with surfaces hydrolyse large polymer chains into smaller units. These byproducts can then be utilised carbon sources by microbes, eventually converted CO2 water. This review explores principal degradation, focus existing emerging polymers made readily biodegradable. In addition, valorisation for converting valuable considered. The implementation circular economy expected lead further development, including scaling up efficient bio-upcycling processes, serve stimulate environmental removal value-added use post-consumer streams.

Language: Английский

---

Properties of Chitin and Its Regenerated Hydrogels from the Insect Zophobas morio Fed Citrus Biomass or Polystyrene

Gels, Journal Year: 2024, Volume and Issue: 10(7), P. 433 - 433

Published: June 29, 2024

The potential of insects as a recycling tool has recently attracted attention. In this study, chitin was extracted with 1 M HCl for 24 h at 20 °C, followed by NaOH 5 90 and bleached 2.5% v/v NaOCl 2 °C from Zophobas morio (ZM) fed citrus waste biomass (OP) or polystyrene foam (PS). highest survival rate found in the OP group. properties resulting material are reported, well preparation hydrogels using DMAc/LiCl solvent. All chitins obtained were α-chitin. degrees deacetylation, crystallinity, molecular weight, solubility similar between PS feeds, they showed viscosities solution. had viscoelastic behavior, indicating that resultant their ZM those PS.

Language: Английский

---

ПЕРСПЕКТИВИ НИЗЬКОТЕМПЕРАТУРНОГО КАТАЛІТИЧНОГО КРЕКІНГУ ПОЛІСТИРОЛУ ЗА АТМОСФЕРНОГО ТИСКУ

Journal of Chemistry and Technologies, Journal Year: 2024, Volume and Issue: 32(2), P. 276 - 283

Published: July 10, 2024

Забруднення пластиком стало однією з глобальних екологічних загроз для людини і світу. Впродовж всього життєвого циклу пластмаси – від видобутку нафти до виробництва та утилізації, вони виділяють хімічні речовини, особливо якщо пластикові відходи не утилізуються належним чином, а зберігаються просто неба на незахищеному ґрунті поблизу джерел води. Хімічна переробка пластикових відходів, яка базується каталітичному крекінгу, запобігає викидам токсичних хімічних речовин у навколишнє середовище, дозволяє отримувати рідкі оливи добавки різних видів палива, також уникати значних енергетичних затрат за використання механічних термічних методів їх переробки. Каталітичний крекінг пластмас присутності природних синтетичних цеолітних каталізаторів широкий спектр ароматичних вуглеводнів. Модифіковані зразки основі CaY використано в крекінгу термопластичного полімеру полістиролу. Залежно обраного типу цеолітного каталізатора (ZSM-5, Ni-ZSM-5, USY, NiHY) визначено практичні виходи компонентів рідкої фракції: стиролу, димеру тримеру етилбензолу, метилстиролу, кумолу інших. Вихід стиролу ZSM-5 становив 42 %, Ni-ZSM-5 5.97 USY 1.26 NiHY 47.37 %. фракції 67.2 38.5 15 70.3 За результатами досліджень встановлено, що найбільш селективним ефективним каталізатором полістиролу (серед вищезазначених) є модифікований нікелем алюмосилікат (NiHY). вихід Отже, подальше вдосконалення необхідне підвищення селективності ефективності процесу низькотемпературного каталітичного метою отримання вторинної сировини синтезу

---