Plastics—Villain or Hero? Polymers and Recycled Polymers in Mineral and Metallurgical Processing—A Review

Devasahayam, Sheila; Singh, Raman Raghuvir Kumar; Chennakesavulu, K.; Bhattacharya, Sankar

doi:10.3390/ma12040655

Cited by 40 publications

(19 citation statements)

References 67 publications

(109 reference statements)

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“…Waste to energy encompasses the interconversion of waste materials to energy and can be possibly achieved with less segregation and rinsing. It can be a futuristic feasible global prospect for plastic waste management [76,77]. Recycled macro plastic fibres (polypropylene) are extensively used up in concrete to boost its post-cracking performance and to inhibit shrinkage cracks.…”

Section: Alternate Viable Methods For Plastic Waste Managementmentioning

confidence: 99%

Plastic waste management, a concern for community

Gupta

2021

Holist. approach environ.

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Plastics i.e. polymers are long chains or networks of monomer molecules which can be fabricated in desired shape, colour and specifications. The multi-functionality of this macromolecule has made it an integral part of society. Due to being given immense importance in various industrial sectors, like information technology, electrical, as well as electronics industries, intelligent, smart and advanced packaging systems, agriculture, automobiles, biomedical applications, etc., they are quite indispensable for the modern generation. The huge demand and high frequency usage have alarmed a number of countries littered with plastic wastes which need to be attended immediately. The effects of plastic solid waste on environmental living and non-living components are noticeable in the ever-increasing level of plastic pollution both on land and in the oceans globally. This paper compiles the various aspects and prospects of disposal methods like landfilling, recycling, progress in recovery and management of plastic waste (i.e. primary, secondary, tertiary and quaternary) in order to minimize its huge volumes. The depolymerisation process is the key technology behind its success which provides a high yield of product and a minimal amount of waste. Few innovative methods other than recycling published by different researchers are also discussed in this paper.

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Section: Alternate Viable Methods For Plastic Waste Managementmentioning

confidence: 99%

Plastic waste management, a concern for community

Gupta

2021

Holist. approach environ.

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“…Furthermore, the presence of carbon in plastic can be used to synthesize carbon nanotube. However, the incineration of hydrocarbon compound could lead to environmental issues due to the formation of dioxins and furans [32]. Therefore, this study is carried out to reuse plastic waste in engineering application.…”

Section: Fourier Transform Infrared (Ftir) Spectroscopymentioning

confidence: 99%

Characteristic Properties of Plastic Wastes: Possibility of Reinforcing Material for Soil

Yasmin

Ismail

Mohamed³

et al. 2021

Jurnal Teknologi

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The current statistic shows that the percentage of plastic has significantly increased in the landfill and leads to environmental issues due to its non-biodegradable characteristic. However, these challenges can be turned into opportunities by reusing and recycling such waste for civil engineering applications. Hence, the focuses of this paper are to analyze the possibility of utilizing plastic waste in the soil reinforcement field using VOSviewer software and to evaluate the chemical, thermal, physical, and mechanical properties of the plastics (plastic straw, plastic bottle, and plastic bag). The data for this study was collected from the articles published in Scopus. Nevertheless, there are very limited articles that relate soil reinforcement with the thermal, chemical, physical, and mechanical properties of plastic waste. Therefore, this paper aims to evaluate the properties of plastic waste, which were plastic bottles, plastic bags, and plastic straw. The properties of plastic waste have been investigated to ensure it meets the requirement for soil reinforcement technology. The Fourier transform infrared (FTIR) spectra indicated the presence of carbon and hydrogen chains in those plastics waste. The plastic straw, plastic bag, and plastic bottle were degraded at 382°C, 456°C, and 449°C, respectively. This finding indicated that all of these plastics waste were thermally stable in the tropical temperature. Moreover, the densities of the plastics waste were less than 1 g/cm3, which contributes to the lightweight material and it’s very crucial to eliminating the self-loading from the reinforcement material.

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“…[39], and hence the ferrospheres were never free from such elemental oxides. Such impure fly ash ferrospheres have been used as fillers in nanocomposites, coke, smelting [12], steel production and other iron and iron-based industries [123]. Additionally, the ferrospheres also find their application in catalysis-i.e., for profound oxidation and oxidative coupling of methane (OCM) [124], thermolysis of heavy oil and petroleum residue [114], magnetic carriers for the separation of recombinant proteins [125], and composite sorbents.…”

Section: Advances In the Recovery Of Ferrous Particles From Fly Ashmentioning

confidence: 99%

Advances in Methods for Recovery of Ferrous, Alumina, and Silica Nanoparticles from Fly Ash Waste

Yadav

Fulekar

2020

Ceramics

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Fly ash or coal fly ash causes major global pollution in the form of solid waste and is classified as a “hazardous waste”, which is a by-product of thermal power plants produced during electricity production. Si, Al, Fe Ca, and Mg alone form more than 85% of the chemical compounds and glasses of most fly ashes. Fly ash has a chemical composition of 70–90%, as well as glasses of ferrous, alumina, silica, and CaO. Therefore, fly ash could act as a reliable and alternative source for ferrous, alumina, and silica. The ferrous fractions can be recovered by a simple magnetic separation method, while alumina and silica can be extracted by chemical or biological approaches. Alumina extraction is possible using both alkali- and acid-based methods, while silica is extracted by strong alkali, such as NaOH. Chemical extraction has a higher yield than the biological approaches, but the bio-based approaches are more environmentally friendly. Fly ash can also be used for the synthesis of zeolites by NaOH treatment of variable types, as fly ash is rich in alumino-silicates. The present review work deals with the recent advances in the field of the recovery and synthesis of ferrous, alumina, and silica micro and nanoparticles from fly ash.

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Plastics—Villain or Hero? Polymers and Recycled Polymers in Mineral and Metallurgical Processing—A Review

Cited by 40 publications

References 67 publications

Plastic waste management, a concern for community

Plastic waste management, a concern for community

Characteristic Properties of Plastic Wastes: Possibility of Reinforcing Material for Soil

Advances in Methods for Recovery of Ferrous, Alumina, and Silica Nanoparticles from Fly Ash Waste

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