Recent Advances in Chemical Recycling of Polyethylene Terephthalate Waste into Value Added Products for Sustainable Coating Solutions- Hope Vs Hype

Materials Advances ◽

10.1039/d1ma01112j ◽

2022 ◽

Author(s):

Krishanu Ghosal ◽

Chinmaya Nayak

Keyword(s):

Polyethylene Terephthalate ◽

Daily Life ◽

Value Added ◽

Chemical Recycling ◽

Dinner Table ◽

Recent Advances ◽

Value Added Products

In the current era of globalization, plastics are an indispensable part of our daily life; from morning toothbrush to night dinner table, plastics are everywhere in our daily life. In...

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Engineering Microbes to Bio-Upcycle Polyethylene Terephthalate

Frontiers in Bioengineering and Biotechnology ◽

10.3389/fbioe.2021.656465 ◽

2021 ◽

Vol 9 ◽

Author(s):

Lakshika Dissanayake ◽

Lahiru N. Jayakody

Keyword(s):

Polyethylene Terephthalate ◽

Metabolic Pathways ◽

Aquatic Ecosystems ◽

Value Added ◽

Building Blocks ◽

Chemical Recycling ◽

Plastic Pollution ◽

Microbial Cell Factories ◽

Cell Factories ◽

Value Added Products

Polyethylene terephthalate (PET) is globally the largest produced aromatic polyester with an annual production exceeding 50 million metric tons. PET can be mechanically and chemically recycled; however, the extra costs in chemical recycling are not justified when converting PET back to the original polymer, which leads to less than 30% of PET produced annually to be recycled. Hence, waste PET massively contributes to plastic pollution and damaging the terrestrial and aquatic ecosystems. The global energy and environmental concerns with PET highlight a clear need for technologies in PET “upcycling,” the creation of higher-value products from reclaimed PET. Several microbes that degrade PET and corresponding PET hydrolase enzymes have been successfully identified. The characterization and engineering of these enzymes to selectively depolymerize PET into original monomers such as terephthalic acid and ethylene glycol have been successful. Synthetic microbiology and metabolic engineering approaches enable the development of efficient microbial cell factories to convert PET-derived monomers into value-added products. In this mini-review, we present the recent progress of engineering microbes to produce higher-value chemical building blocks from waste PET using a wholly biological and a hybrid chemocatalytic–biological strategy. We also highlight the potent metabolic pathways to bio-upcycle PET into high-value biotransformed molecules. The new synthetic microbes will help establish the circular materials economy, alleviate the adverse energy and environmental impacts of PET, and provide market incentives for PET reclamation.

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Environment and plastics : A review on greener routes for plastic bottle (PET) waste management through recycling processes

AN ASIAN JOURNAL OF SOIL SCIENCE ◽

10.15740/has/ajss/15.2/105-110 ◽

2020 ◽

Vol 15 (2) ◽

pp. 105-110

Author(s):

Swati Singh

Keyword(s):

Polyethylene Terephthalate ◽

Value Added ◽

Waste Recycling ◽

Operating Conditions ◽

Chemical Recycling ◽

Short Term ◽

Research Papers ◽

Pet Waste ◽

Viable Solution ◽

Value Added Products

Many research papers have been contributed by several authors for making polyethylene terephthalate (PET) waste recycling economically and ecologically more viable as it creates environmental hazards when disposed off after its short term use. Recycling of PET waste was started in last two decades. Most of the authors are devoting their time in getting economically viable solution for development of methods based on either mechanical or chemical recycling. Some success has been obtained in development of chemical recycling methods which provides value added products from PET waste. In this study the operating conditions and mechanism of various recycling processes available for the recycling of polyethylene terephthalate (PET) waste are reported and described.

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Recent advances in the conversion of bioglycerol into value-added products

European Journal of Lipid Science and Technology ◽

10.1002/ejlt.200800210 ◽

2009 ◽

Vol 111 (8) ◽

pp. 788-799 ◽

Cited By ~ 67

Author(s):

Mario Pagliaro ◽

Rosaria Ciriminna ◽

Hiroshi Kimura ◽

Michele Rossi ◽

Cristina Della Pina

Keyword(s):

Value Added ◽

Recent Advances ◽

Value Added Products

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Recent advances in microbial CO2 fixation and conversion to value-added products

Chemical Engineering Journal ◽

10.1016/j.cej.2020.124584 ◽

2020 ◽

Vol 390 ◽

pp. 124584 ◽

Cited By ~ 7

Author(s):

Hossein Salehizadeh ◽

Ning Yan ◽

Ramin Farnood

Keyword(s):

Co2 Fixation ◽

Value Added ◽

Recent Advances ◽

Value Added Products

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Transition-metal catalyzed valorization of lignin: the key to a sustainable carbon-neutral future

Organic & Biomolecular Chemistry ◽

10.1039/c5ob02212f ◽

2016 ◽

Vol 14 (6) ◽

pp. 1853-1914 ◽

Cited By ~ 92

Author(s):

Markus D. Kärkäs ◽

Bryan S. Matsuura ◽

Timothy M. Monos ◽

Gabriel Magallanes ◽

Corey R. J. Stephenson

Keyword(s):

Transition Metal ◽

Value Added ◽

Recent Advances ◽

Carbon Neutral ◽

Transition Metal Catalyzed ◽

Metal Catalyzed ◽

Value Added Products

Recent advances in transition-metal catalyzed depolymerization of lignin to value-added products are discussed in this review.

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Recent Advances in the Reutilization of Granite Waste in Various Fields

Journal of Material Science and Technology Research ◽

10.31875/2410-4701.2021.08.5 ◽

2021 ◽

Vol 8 ◽

pp. 30-40

Author(s):

Di Wang ◽

Jinshan Lu ◽

Junxiong Zhan ◽

Zhiyong Liu ◽

Bin Xie

Keyword(s):

Building Materials ◽

Sewage Treatment ◽

Value Added ◽

High Strength ◽

Potash Feldspar ◽

Flotation Process ◽

Recent Advances ◽

Main Components ◽

Fine Ceramics ◽

Value Added Products

Quarrying and processing of granite produce large amounts of waste residues. Besides being a loss of resources, improper disposal of these wastes results in pollution of the soil, water and air around the dumpsites. The main components of granite waste are quartz, feldspars and a small amount of biotite. Due to its hard and dense texture, high strength, corrosion resistance and wear resistance, granite waste may be recycled into building materials, composite materials and fine ceramics, effectively improving their mechanical properties and durability. By using the flotation process, high value-added products such as potash feldspar and albite may be retrieved from granite waste. Also, granite waste has the potential for application in soil remediation and sewage treatment. This review presents recent advances in granite waste reutilization, and points out the problems associated with its use, and the related countermeasures, indicating the scale of high value-added reutilization of granite waste.

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