Orange peel ash coated Fe3O4 nanoparticles as a magnetically retrievable catalyst for glycolysis and methanolysis of PET waste

Lalhmangaihzuala, Samson; Laldinpuii, ZT; Khiangte, Vanlalngaihawma; Lallawmzuali, Gospel; Thanhmingliana,; Vanlaldinpuia, Khiangte

doi:10.1016/j.apt.2023.104076

Cited by 14 publications

(5 citation statements)

References 70 publications

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“…98 Lalhmangaihzuala prepared a green heterogeneous solid catalyst OPA@Fe 3 O 4 with a high specific surface area and high mesoporous quality from biomass waste, and the monomer yield of DMT reached 83% after reacting for 1 h at 200 °C. 105 The catalyst can be recycled and has stable catalytic efficiency, but the preparation process is relatively complex, which is not conducive to large-scale industrial promotion. Moreover, some teams have carried out methanolysis on discarded PET bottles under microwave irradiation, significantly shortening the reaction time.…”

Section: Recycling and Depolymerisation Of Petmentioning

confidence: 99%

Recycling and depolymerisation of poly(ethylene terephthalate): a review

Wang,

Li,

Zheng

et al. 2024

Polym. Chem.

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Section: Recycling and Depolymerisation Of Petmentioning

confidence: 99%

Recycling and depolymerisation of poly(ethylene terephthalate): a review

Wang,

Li,

Zheng

et al. 2024

Polym. Chem.

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“…In the last decade, magnetic nanoparticles have been recognized as excellent supports due to their easy preparation and operation, and high surface area, easy recovery by the magnetic field, which will lead to increased product purity [ 17 , 18 ]. Also, the most important advantage of magnetic nanoparticles is their separation from the reaction mixture with the help of a bar magnet [ 19 ]. Among the heterogeneous nanocatalysts, TiFe 2 O 4 has received much attention due to its simplicity in the synthesis method and easy separation using magnets [ 20 , 21 ].…”

Section: Introductionmentioning

confidence: 99%

TiFe2O4@SiO2–SO3H: A novel and effective catalyst for esterification reaction

Yakdhan Saleh,

Obaid Aldulaimi,

Mahmood Saeed

et al. 2024

Heliyon

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“…Novel sustainable catalytic methods behind the solvolysis, or glycolysis, of PET use biomass-waste-derived catalysts, like orange peel ash (OPA). These procedures produce BHET in similar yields to protocols using traditional catalysts like heavy metal acetate salts [6][7][8][9][10][11][12]. Chemical recycling is primarily focused on reproducing materials using monomers released through depolymerization but involves additional separation and purification steps to yield high-quality monomers.…”

Section: Introductionmentioning

confidence: 99%

Two-Step Chemo-Microbial Degradation of Post-Consumer Polyethylene Terephthalate (PET) Plastic Enabled by a Biomass-Waste Catalyst

Shingwekar,

Laster,

Kemp

et al. 2023

Bioengineering

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Polyethylene terephthalate (PET) pollution has significant environmental consequences; thus, new degradation methods must be explored to mitigate this problem. We previously demonstrated that a consortium of three Pseudomonas and two Bacillus species can synergistically degrade PET in culture. The consortium more readily consumes bis(2-hydroxyethyl) terephthalate (BHET), a byproduct created in PET depolymerization, compared to PET, and can fully convert BHET into metabolically usable monomers, namely terephthalic acid (TPA) and ethylene glycol (EG). Because of its crystalline structure, the main limitation of the biodegradation of post-consumer PET is the initial transesterification from PET to BHET, depicting the need for a transesterification step in the degradation process. Additionally, there have been numerous studies done on the depolymerization reaction of PET to BHET, yet few have tested the biocompatibility of this product with a bacterial consortium. In this work, a two-step process is implemented for sustainable PET biodegradation, where PET is first depolymerized to form BHET using an orange peel ash (OPA)-catalyzed glycolysis reaction, followed by the complete degradation of the BHET glycolysis product by the bacterial consortium. Results show that OPA-catalyzed glycolysis reactions can fully depolymerize PET, with an average BHET yield of 92% (w/w), and that the reaction product is biocompatible with the bacterial consortium. After inoculation with the consortium, 19% degradation of the glycolysis product was observed in 2 weeks, for a total degradation percentage of 17% when taking both steps into account. Furthermore, the 10-week total BHET degradation rate was 35%, demonstrating that the glycolysis products are biocompatible with the consortium for longer periods of time, for a total two-step degradation rate of 33% over 10 weeks. While we predict that complete degradation is achievable using this method, further experimentation with the consortium can allow for a circular recycling process, where TPA can be recovered from culture media and reused to create new materials.

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Orange peel ash coated Fe3O4 nanoparticles as a magnetically retrievable catalyst for glycolysis and methanolysis of PET waste

Cited by 14 publications

References 70 publications

Recycling and depolymerisation of poly(ethylene terephthalate): a review

Recycling and depolymerisation of poly(ethylene terephthalate): a review

TiFe2O4@SiO2–SO3H: A novel and effective catalyst for esterification reaction

Two-Step Chemo-Microbial Degradation of Post-Consumer Polyethylene Terephthalate (PET) Plastic Enabled by a Biomass-Waste Catalyst

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