Environmental and economic evaluation of cathode ray tube (CRT) funnel glass waste management options in the United States

Xu, Qingbo; Yu, Mengjing; Kendall, Alissa; He, Wenzhi; Li, Guangming; Schoenung, Julie M.

doi:10.1016/j.resconrec.2013.07.001

Cited by 43 publications

(9 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The state-of-the-art recovery process based on hydrometallurgy methods, solvent extraction, is a heavy burden to the environment. Besides the emission of volatile solvents and ammonia waste gas, the inorganic acids adopted in the complete leaching and liquid–liquid extraction procedures contributed significantly to the ozone depletion, human toxicity potential, marine aquatic eco-toxicity potential, eutrophication, greenhouse gas emission, and material cost of the total hydrometallurgy process. ,− The selective leaching process was regarded as an efficient technique to decrease the acid consumptions. In the recovery of a NdFeB permanent magnet, the acids needed in the selective leaching were only 1 / 8 of the complete leaching theoretically (the calculation details were shown in the Supporting Information).…”

Section: Resultsmentioning

confidence: 99%

Efficient Recovery of End-of-Life NdFeB Permanent Magnets by Selective Leaching with Deep Eutectic Solvents

Liu

Yan

Zhang

et al. 2020

Environ. Sci. Technol.

View full text Add to dashboard Cite

The NdFeB permanent magnet is a critical material in digital electronics and clean energy industry. Traditional recovery processes based on the solvent extraction technique would consume high energy and large amounts of chemicals as well as resulting in abundant secondary organic wastes. In this work, a green process using deep eutectic solvents (DESs) in the selective leaching technology was designed to recover NdFeB permanent magnets. Nine kinds of DESs composed of guanidine were prepared and screened as the leachants. The guanidine hydrochloride–lactic acid (GUC–LAC) combined DES achieved the highest separation factor (>1300) between neodymium and iron through simple dissolution of their corresponding oxide mixture. The mass concentration of Nd dissolved in the GUC–LAC DES could reach 6.7 × 104 ppm. The viscosity of this type of DES at 50 °C was 36 cP, which was comparable to many common organic solvents. In a practical recovery of roasted magnet powders, the Nd2O3 product with 99% purity was facilely obtained with only one dissolution step, followed by a stripping process with oxalic acid. Even after 3 cycles, the GUC–LAC DES kept the same dissolution property and chemical stability. With such superior performances in selective leaching of rare earth elements from transition metals, the GUC–LAC DES is greatly promising in the rare earth element recovery field.

show abstract

Section: Resultsmentioning

confidence: 99%

Efficient Recovery of End-of-Life NdFeB Permanent Magnets by Selective Leaching with Deep Eutectic Solvents

Liu

Yan

Zhang

et al. 2020

Environ. Sci. Technol.

View full text Add to dashboard Cite

show abstract

“…Other works show that recycling generally has a lower impact compared to other alternatives such as incineration or landfill ( Hong et al, 2015 ;Wäger et al, 2011 ). Another aspect that has been studied is the collection and logistic of WEEE due to its high variability, which can compromise their environmental benefits ( Caudill and Dickinson, 2004 ;Gamberini et al, 2010 ;Xu et al, 2013 ).…”

Section: Literature Reviewmentioning

confidence: 99%

Life cycle assessment of repurposed waste electric and electronic equipment in comparison with original equipment

Martínez

Carrillo

Iglesias

et al. 2021

Sustainable Production and Consumption

View full text Add to dashboard Cite

“…Additionally, this manner of recycling CRT glass is not extensively utilized due to its low pro tability, largely a result of the high cost of processing it to meet manufacturers' standards (Ravi V 2012). Furthermore, common disposal practices such as glass smelting or discarding of electronics in land lls are becoming obsolete and unsustainable due to the associated environmental risks (Xu QB et al 2013). Therefore, more lowcost and environmentally friendly recycling methods need to be developed to solve the current issues with CRT glass waste management.…”

Section: Introductionmentioning

confidence: 99%

Preparation of hydrothermally solidified materials from waste cathode ray tube panel glass for construction applications

Zhang

Xu²,

Wang

et al. 2022

Environ Sci Pollut Res

Self Cite

View full text Add to dashboard Cite

Solidi cation of cathode ray tube (CRT) panel glass was carried out using a hydrothermal processing method. In this way, the glass powder was rst compacted in a mold at 20 MPa, and then hydrothermally cured in an autoclave under saturated steam pressure at 200 ℃ for 6 hours. The CRT panel glass was then hydrothermally solidi ed by the formation of tobermorite (Ca 5 Si 6 O 16 (OH) 2 •4H 2 O), which was encouraged by the addition of slaked lime (Ca(OH) 2 ). The nal solidi ed specimen's strength was heavily depended on the amount of tobermorite formed, with higher concentrations of tobermorite producing commensurately greater mechanical strength. With the addition of slaked lime at 20%-30% by mass, the specimen achieved a exural strength of approximately 16 MPa, which is su ciently great for using as a construction material. As such, there is cause to believe that the hydrothermal processing method used here may have substantial potential for the product of high-quality recycled CRT panel glass with properties suitable for utilization as a construction material.

show abstract

Environmental and economic evaluation of cathode ray tube (CRT) funnel glass waste management options in the United States

Cited by 43 publications

References 12 publications

Efficient Recovery of End-of-Life NdFeB Permanent Magnets by Selective Leaching with Deep Eutectic Solvents

Efficient Recovery of End-of-Life NdFeB Permanent Magnets by Selective Leaching with Deep Eutectic Solvents

Life cycle assessment of repurposed waste electric and electronic equipment in comparison with original equipment

Preparation of hydrothermally solidified materials from waste cathode ray tube panel glass for construction applications

Contact Info

Product

Resources

About