Preparation of foamed glasses from CRT TV glass by means of hydrothermal hot-pressing technique

Matamoros-Veloza, Z.; Rendón-Ángeles, J.C.; Yanagisawa, Kazumichi; Cisneros-Guerrero, M.A.; Cisneros-Guerrero, M.M; Aguirre, Luis E.

doi:10.1016/j.jeurceramsoc.2007.09.014

Cited by 42 publications

(21 citation statements)

References 12 publications

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“…hydrothermal hot-pressing is now widely used as a new technique for functional material synthesis and fixation of solid waste [10,11]. In hydrothermal hotpressing, ion product is thousand times that of the value under normal temperature and pressure, which is the reason for its considerable increase in reaction rate.…”

Section: Introduction Cmentioning

confidence: 99%

High-Strength Solidification of Fly Ash/Carbide Slag and Its Fixing Ability for Heavy Metals

Song¹,

Wei²,

Ji³

et al. 2017

JRST

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Hydrothermal hot-pressing will occur between silica in fly ash and calcium in carbide slag and give rise to high-strength hydrates. High-strength solidified specimens were prepared with fly ash and carbide slag via hydrothermal hot-pressing at 200°C and 7 MPa. The effect of concentration of activator and content of carbide slag on compressive strength of the specimens was analyzed. It was found that when the mass ratio of fly ash to carbide slag was 1:1 and 20% 5 mol/L NaOH solution was added, the solidified specimens contained a large amount of cross-linked fibrous tobermorite with compressive strength of 70.93 MPa. The solidified specimens had a good fixation effect on such heavy metals as Cu, Zn, Cd and Pb. Hydrothermal hot-pressing, featured by simple procedures, easy automation and low cost, is an ideal potential way of utilizing fly ash and carbide slag and fixation of heavy metals.

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Section: Introduction Cmentioning

confidence: 99%

High-Strength Solidification of Fly Ash/Carbide Slag and Its Fixing Ability for Heavy Metals

Song¹,

Wei²,

Ji³

et al. 2017

JRST

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“…Tung-Chai Ling [13] used recycled glass derived from CRT glass with a specific gravity of approximately 3.0 g/cm 3 as fine aggregate for preparing cement mortars for X-ray radiation-shielding applications. Functional materials such as different foam glasses made by CRT glasses were investigated as well [14][15][16]. Longprocess time, high-energy consumption and low-lead recovery efficiency, however, limited the recycling of waste CRT glass.…”

Section: Introductionmentioning

confidence: 99%

Detoxification effect of chlorination procedure on waste lead glass

Erzat

Zhang

2014

J Mater Cycles Waste Manag

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This work reports the detoxification effect of chlorinating volatilization procedure on waste lead glass. The effects of various reaction parameters on lead removal efficiencies were examined, and the optimal operation conditions were 1000°C, 2 h, and 600 ± 50 Pa, respectively. Moreover, it was found that the residues could be safely applied in a wide range, e.g., for wollastonite synthesis by an environmental benign technique. Accordingly, the typical hazardous waste was successfully converted into a safe raw material for further industrial application.

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“…Thus far, many studies have been carried out on CRT glass treatments [4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21]. In previous years, CRT glass was generally cleaned, sorted and sent to glass manufacturers for new CRT glass manufacturing.…”

Section: Introductionmentioning

confidence: 99%

“…In previous years, CRT glass was generally cleaned, sorted and sent to glass manufacturers for new CRT glass manufacturing. Currently, due to the extreme reduction in CRT production, much attention had been attracted to the recycle of CRT glass as a secondary raw material, such as reutilization as glaze [4,5], glass ceramic [6], foam glass [7][8][9][10][11][12] and glass matrix composites [13][14][15][16]. Nevertheless, these methods paid little attention to the environmental security, since the prepared products still contain dangerous heavy metals, which should be removed or separated.…”

Section: Introductionmentioning

confidence: 99%

Effective utilization of waste cathode ray tube glass—Crystalline silicotitanate synthesis

Chen

Zhang

Zhu

2010

Journal of Hazardous Materials

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a b s t r a c tA novel process for crystalline silicotitanate (CST) synthesis was developed using waste cathode ray tube (CRT) panel glass as silicon source. The key trait of the process was to extract most of the silicon out of the glass for CST preparation, but leave Ba and Sr in the residue which had the potential to be employed as raw material for metallic Ba and Sr metallurgy. In the synthesis process, waste CRT panel glass was firstly treated by supercritical water (SCW)-NaOH solution for Si extraction, then sol-gel and hydrothermal treatments were used for CST preparation. 80% of Si in the glass could be extracted into the solution, while Sr and Ba were enriched in the residue in the form of Sr 2 SiO 4 and Ba 2 Si 3 O 8 , respectively. Sr and Ba contents in the residue were 2-3 times higher than those in the raw glass. SEM, XRD and TEM results indicated that CST was successfully synthesized. Ion exchanging experiments showed that the batch distribution coefficient of the synthesized CST to Cs + was up to 1.2 × 10 4 mL/g at pH 0.26.

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Preparation of foamed glasses from CRT TV glass by means of hydrothermal hot-pressing technique

Cited by 42 publications

References 12 publications

High-Strength Solidification of Fly Ash/Carbide Slag and Its Fixing Ability for Heavy Metals

High-Strength Solidification of Fly Ash/Carbide Slag and Its Fixing Ability for Heavy Metals

Detoxification effect of chlorination procedure on waste lead glass

Effective utilization of waste cathode ray tube glass—Crystalline silicotitanate synthesis

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