Melt densification of radioactive plastic wastes

Rao, Shodhan; Lal, K. B.

doi:10.1007/s10967-006-0367-3

Cited by 4 publications

(2 citation statements)

References 2 publications

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“…Unfortunately, plastic waste from nuclear industries are conventionally dealt with by compaction for landfill operations or direct incineration. For instance, the melt densification of plastic waste at temperatures below 200 °C was studied by Rao et al 158 and Jing et al 159 in an effort to reduce the volume of waste plastics containing cesium and strontium radionuclides for landfill operations. However, these conventional approaches have potential impacts on ecology; therefore, a process for safe and cost-effective disposal of such wastes is necessary.…”

Section: Polypropylene (Pp)mentioning

confidence: 99%

Thermochemical Recycling of Waste Plastics by Pyrolysis: A Review

et al. 2021

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The increasing demand for plastics for their widespread applications has ultimately resulted in accumulation of substantial plastic waste, which remains a concern due to limited efforts, inadequacy, and environmental distresses of conventional techniques for waste plastics remediation. The enhanced production of raw materials for polymer syntheses has a dual impact on our ecosystem by causing rapid depletion of nonrenewable petroleum resources and waste generation. To address this situation, researchers have adopted advanced thermochemical recycling processes to produce intermediate products of the petrochemical industries including monomers, fuels, and other value-added products. Such practices can potentially serve the purpose of a circular economy. This review aims to cover the recent highlights in the field of waste plastics pyrolysis including critical observations from the past to provide precise understanding. Consequently, the reactivities and product distributions for plastic feeds, pyrolysis reactors, roles of catalysts, and effects of operating parameters on reactivity and selectivity have been covered. Coprocessing of plastic waste with radioactive materials, biomass, and heavy petroleum residue is also discussed. Furthermore, an overview on kinetics and mechanistic aspects of plastic pyrolysis is presented with a discussion on relevant analytical techniques. The applications of pyrolysis oil as a fuel or fuel additive are comprised in a separate section. Lastly, comparisons of existing chemical recycling technologies, summaries of commercial operations, and future projections are provided.

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Section: Polypropylene (Pp)mentioning

confidence: 99%

Thermochemical Recycling of Waste Plastics by Pyrolysis: A Review

et al. 2021

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“…Polymer coatings are found in a variety of application areas, from food packaging [1][2][3] and automotive paints [4][5][6][7][8] to corrosion prevention [9][10][11][12][13][14] and material decontamination. [15][16][17][18][19][20][21] One of the DOI: 10.1002/marc.202300304 primary functions of coatings is to protect the underlying substrate against external agents, such as solvents, [22][23][24] toxins, [25,26] bacteria, [27][28][29][30][31][32] or corrosive ions, [33][34][35][36][37][38][39] that are harmful to the underlying surface. Since these external agents vary, protective coatings need to be designed for the specific application in question.…”

Section: Introductionmentioning

confidence: 99%

Visualizing Penetration of Fluorescent Dye through Polymer Coatings

Chaudhuri

Medhi

Zhang

et al. 2023

Macromol. Rapid Commun.

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Understanding how small molecules penetrate and contaminate polymer films is of vital importance for developing protective coatings for a wide range of applications. To this end, we visualize how rhodamine B fluorescent dye diffuses through polystyrene‐polydimethylsiloxane block copolymer coatings using confocal microscopy. The intensity of dye inside the coatings grows and decays non‐monotonically, which is likely due to a combination of dye molecule transport occurring concurrently in different directions. An empirical fitting equation allows us to compare the contamination rates between copolymers, demonstrating that dye penetration is related to the chemical makeup and configuration of the block copolymers. Our work shows that confocal microscopy can be a useful tool to visualize the transport of a fluorophore in space and time through a coating.This article is protected by copyright. All rights reserved

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