Analysis of contaminants and their formation mechanism in the desiccation-dissociation process of organic impurity of waste glass

Qin, Baojia; Yao, Zichun; Deng, Kangzhi; Ruan, Jujun; Xu, Zhenming

doi:10.1016/j.jhazmat.2021.125881

Cited by 13 publications

(7 citation statements)

References 22 publications

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“…The bond angle of H–C–C increased and the bond angle of H–C–H decreased, which indicated that the PP molecule was deformed. The reason why the chemical bonds of the PP molecule did not fracture might be the limitation of van der Waals force and Coulomb force . Except the PP molecule, other organic impurity molecules had been decomposed during the heat-desiccation dissociation process.…”

Section: Resultsmentioning

confidence: 99%

“…The organic impurity used in the experiment mainly includes labels and adhesives. Labels are mainly divided into paper labels and plastic labels . The main component of paper labels is cellulose, and main components of plastic labels are polypropylene (PP), polyethylene terephthalate, and polyvinyl chloride.…”

Section: Methodsmentioning

confidence: 99%

“…The vast majority of waste glass has not been properly treated, piling up in the wild and landfills and occupying a large amount of land resources . Due to the extensive source, the waste glass is usually mixed with various substances, such as plastics, metals, organic impurity, inorganic impurity, and so forth . These substances, such as plastics, may produce plenty of toxic and harmful substances after a long time of decomposition, which will cause serious harm to the environment and human body.…”

Section: Introductionmentioning

confidence: 99%

“…After simple cleaning and sorting, it can be reused as raw materials, which can greatly reduce carbon emissions in the glass industry in the context of circular economy . Meanwhile, waste glass also contains 1–3% of metal resources, such as Al, Cu, Fe, and so forth, whose recovery can also generate considerable economic benefits . Thus, whether from the environmental perspective and economic perspective, the recovery of waste glass is in line with the principle of sustainable development of resources and environment.…”

Section: Introductionmentioning

confidence: 99%

“…The heat-desiccation dissociation technology of organic impurity and inorganic impurity in waste glass utilizes the rotation of the roller to fluidize and diffuse the waste glass . The waste glass spirally moves forward in the roller and collides and rubs against each other in the fluidization and rotation process.…”

Section: Introductionmentioning

confidence: 99%

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Analysis of the Products and Decomposition Mechanisms of the Different Organic Impurities in Waste Glass during the Heat-Desiccation Dissociation Process

Qin

Huang

Ruan

et al. 2021

ACS Sustainable Chem. Eng.

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The heat-desiccation dissociation technology is recommended to remove the organic impurity during the recovery of waste glass. Some organic impurity attaches to waste glass and the other falls off during transportation and storage. However, their differences in pollutant release during heat-desiccation dissociation have not been reported. In this study, the products and decomposition mechanisms of different organic impurities during heat-desiccation dissociation were investigated. Organic impurity attached to waste glass produced fewer pollutants, and the components of gas and residue were simpler. The main component of gas was alanine (a nontoxic substance), accounting for 40.94%. However, the main component of gas of pure organic impurity was propene (a low-toxic substance), accounting for 28.94%. Molecular dynamics showed that the decomposition degree of organic impurity attached to waste glass was low, leading to the simpler product component. The formation of NH2 • was the main reason for the generation of alanine. Thus, the organic impurity that has fallen off should be removed before the heat-desiccation dissociation process. This study provides technological guidance for the heat-desiccation dissociation technology during waste glass recovery.

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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