Green Combined Resource Recycling System for the Recycling of Waste Glass

Yao, Zichun; Qin, Baojia; Huang, Zhihao; Ruan, Jujun; Xu, Zhenming

doi:10.1021/acssuschemeng.1c01797

Cited by 13 publications

(7 citation statements)

References 27 publications

(42 reference statements)

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“…For decades, pharmaceutical industries have relied on vials made of borosilicate glass, appreciated for its high chemical stability [ 3 ] and indefinite, in principle, recyclability [ 4 , 5 ]. It has been estimated that, in general, 6 tons of recycled glass directly save 6 tons of resources and reduce the emission of CO 2 by 1 ton [ 6 ]. However, this is hardly realized for pharmaceutical glasses, synthesized from high purity feedstock and shaped into preforms (e.g., tubes and rods, to be later transformed into vials, syringes, etc.…”

Section: Introductionmentioning

confidence: 99%

Upcycling of Pharmaceutical Glass into Highly Porous Ceramics: From Foams to Membranes

et al. 2022

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The present COVID-19 emergency has dramatically increased the demand for pharmaceutical containers, especially vials. End-of-life containers, however, cannot be easily recycled in the manufacturing of new articles. This paper presents some strategies for upcycling of pharmaceutical glass into various porous ceramics. Suspensions of a fine glass powder (70 vol%) are used as a starting material. Highly uniform cellular structures may be easily prepared by vigorous mechanical stirring of partially gelified suspensions with added surfactant, followed by drying and firing at 550–650 °C. Stabilization of the cellular structures at temperatures as low as the glass transition temperature (Tg) of the used glass is facilitated by thermal decomposition of the gel phase, instead of viscous flow sintering of glass. This finding enabled the preparation of glass membranes (∼78 vol% open porosity), by direct firing of hardened suspensions, avoiding any surfactant addition and mechanical stirring. The powders obtained by crushing of hardened suspensions, even in unfired state, may be used as a low-cost sorbent for dye removal.

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Section: Introductionmentioning

confidence: 99%

Upcycling of Pharmaceutical Glass into Highly Porous Ceramics: From Foams to Membranes

et al. 2022

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“…The traditional hydraulic cleaning process is used to remove the adhesive organic impurities on the surface of the waste glass. Each ton of waste glass is treated with 0.4 tons of organic wastewater, , which has poor economic benefits. Hot drying technology requires a tube furnace to provide a high temperature of nearly 1000 degrees, and energy consumption in the general planetary ball mill is more than 10 times.…”

Section: Resultsmentioning

confidence: 99%

Control the Mechanochemical Energy of Ball Milling To Remove Surface Organic Contamination without Damaging the Integrity of the Glass

Wu,

Lin,

Ruan

2023

ACS Sustainable Chem. Eng.

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Globally, more than 20 billion tons of waste glass are produced every year, which means that it has a considerable circular economic value. However, waste glass contains complex ingredients, and the surface often adheres to organic glue and labels, which, if improper disposal, may produce a large number of toxic and harmful substances. This paper presents a technique for removing and degrading organic impurities on glass surfaces by ball milling with a limited velocity. According to collision theory and the strength of materials, it was calculated that the glass would not be broken by ball milling at 146 r/min. Due to mechanochemistry reactions of organic pollutants on the surface, a large number of hydroxyl and ethylenic bond groups were decomposed, producing harmless organic gases, such as propane and ethyl acetate. The restricted mechanochemical energy would selectively break the hydroxyl bond and C–C bond with a lower energy barrier. The degradation rate of organic pollution on the surface of the waste glass could reach 85. 4%, the integrity of the recycled glass was not damaged, and the elastic modulus was reduced by 5.66%. The whole glass still maintained good mechanical properties. This paper provides an energy-saving and efficient method for waste glass to remove pollution, reduce damage, and promote the recycling of waste glass.

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“…Mixed impurities can be effectively separated and removed through sorting processes like high voltage electrostatic separation . Hydraulic cleaning technology is usually used to remove adhesive impurities on the waste glass surface, resulting in a large amount of high concentration organic wastewater, which limits the green recycling of waste glass . It is urgent to develop a green and efficient cleaning technology to remove adhesive impurities on the waste glass surface.…”

Section: Introductionmentioning

confidence: 99%

Removing Adhesive Impurities from Waste Glass to Regenerate into Ground Glass by High-Speed Fluid Friction Cleaning Technology

Lin,

Pang,

Qin

et al. 2023

ACS Sustainable Chem. Eng.

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Recycling waste glass is an important issue in the field of global environment protection and sustainable development, for which the removal of adhesive impurities on waste glass is the key. Hydraulic cleaning is the commonly used technology, which has low cleaning efficiency and produces a large amount of wastewater. Thus, it is vital to develop a green cleaning technology for waste glass. In this study, high-speed fluid friction cleaning technology was used to remove soy sauce stains on waste glass and recycle the waste glass. At 0.3 MPa, stains on waste glass were effectively cleaned by quartz sand, glass powder, and iron sand, which caused 0.017%, 0.006%, and 0.003% weight loss to the glass matrix for each 1 mm 2 of waste glass cleaning, respectively. After cleaning, the glass product can be reused as a ground glass. The ground glass prepared by a quartz sand treatment had the best properties. Movement behavior simulations of cleaning media showed that the ejection velocity of iron sand was the lowest at 62.6 m/s under 0.3 MPa, which was 13.4 and 12.4 m/s lower than that of quartz sand and glass powder. Lower ejection velocity was the main reason for the lowest weight loss of the glass matrix during the cleaning process. This paper provides a novel idea for recycling waste glass with adhesive impurities.

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Green Combined Resource Recycling System for the Recycling of Waste Glass

Cited by 13 publications

References 27 publications

Upcycling of Pharmaceutical Glass into Highly Porous Ceramics: From Foams to Membranes

Upcycling of Pharmaceutical Glass into Highly Porous Ceramics: From Foams to Membranes

Control the Mechanochemical Energy of Ball Milling To Remove Surface Organic Contamination without Damaging the Integrity of the Glass

Removing Adhesive Impurities from Waste Glass to Regenerate into Ground Glass by High-Speed Fluid Friction Cleaning Technology

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