Treatment of airborne asbestos and asbestos-like microfiber particles using atmospheric microwave air plasma

Averroes, A.; Sekiguchi, Hidetoshi; Sakamoto, K.

doi:10.1016/j.jhazmat.2011.08.062

Cited by 21 publications

(5 citation statements)

References 17 publications

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“…16–18 This method has also the advantages that it can be directly applied in the field and it can be used as an alternative maintenance method to substitute for the dismantling process of asbestos-containing materials, while focusing on its safe and continuous use. 19–22…”

Section: Introductionmentioning

confidence: 99%

Improvement in the prevention of asbestos fibre release from ceiling materials by increasing the penetration of a silicate stabilizer through dilution

Shin

Choi

Jeon

et al. 2017

Indoor and Built Environment

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The effect of diluting asbestos stabilizer on its performance of suppressing the asbestos fibre release has been investigated in terms of its penetrability into ceiling materials containing asbestos fibres. The performance of a silicate stabilizer was determined for cases where the ceiling material was damaged by external factors. The higher dilution rate of the stabilizer resulted in lower viscosities and hence greater penetration depths into asbestos ceiling materials. In addition, for cases in which the diluted stabilizer was sprayed several times onto the ceiling materials, the released asbestos fibre concentration was shown to be reduced by approximately 89% compared to the case of damaged ceiling material. Furthermore, this held true in cases where treated ceiling materials were damaged. The optimum condition, considering both performance and efficiency, is for a stabilizer with distilled water to be applied onto the damaged asbestos ceiling materials several times.

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Section: Introductionmentioning

confidence: 99%

Improvement in the prevention of asbestos fibre release from ceiling materials by increasing the penetration of a silicate stabilizer through dilution

Shin

Choi

Jeon

et al. 2017

Indoor and Built Environment

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“…Chemical treatment methods of asbestos-containing material using oxalic acid [21], Na-oxalate and Na-acetate [22], sulfuric acid [23], and hydrogen peroxide [24] could alter significantly asbestos material. Thermal treatment methods of asbestos using microwave [25][26][27] and microwave air plasma [28] could also alter effectively asbestos to non-hazardous form. However, thermal treatment requires vast amount of energy.…”

Section: Introductionmentioning

confidence: 99%

Direct Aqueous Mineral Carbonation of Waste Slate Using Ammonium Salt Solutions

Rha

et al. 2015

Metals

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Abstract:The carbonation of asbestos-containing waste slate using a direct aqueous mineral carbonation method was evaluated. Leaching and carbonation tests were conducted on asbestos-containing waste slate using ammonium salt (CH3COONH4, NH4NO3, and NH4HSO4) solutions at various concentrations. The CH3COONH4 solution had the highest Ca-leaching efficiency (17%-35%) and the NH4HSO4 solution had the highest Mg-leaching efficiency (7%-24%) at various solid dosages and solvent concentrations. The CaCO3 content of the reacted materials based on thermogravimetric analysis (TGA) was approximately 10%-17% higher than that of the as-received material for the 1 M CH3COONH4 and the 1 M NH4HSO4 solutions. The carbonates were precipitated on the surface of chrysotile, which was contained in the waste slate reacted with CO2. These results imply that CO2 can be sequestered by a direct aqueous mineral carbonation using waste slate.

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“…Thermal asbestos detoxification treatments in a water vapor atmosphere [7] and using microwaves [8][9][10] and microwave air plasma [11] have also been proposed. Kozawa et al [7] showed that chrysotile was decomposed by heat treatment at 800 C in a water vapor atmosphere; the atmosphere also reduced the temperature of chrysotile decomposition.…”

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confidence: 99%

A Low Temperature Detoxification Method for Treatment of Chrysotile-Containing Waste Roofing Slate

Jang

2017

Minerals

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Abstract:In this study, we evaluated a two-step process for detoxification of waste roofing slate, involving cement hydrate removal and low temperature detoxification using oxalic acid. These treatments were conducted on raw material and intermediate product, respectively. Cement hydrate removal effectively eliminated most Ca-containing cement hydrate components from the raw material under the following conditions: HCl to solid ratio: 0.456 g/g, reaction time: 2 h, and solid to liquid ratio: 0.124 g/mL. Following low temperature (~100 • C) detoxification of intermediate product obtained after cement hydrate removal, chrysotile in waste roofing slate was effectively transformed to Mg-oxalate under conditions of oxalic acid to solid ratio of >0.67 g/g.

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Treatment of airborne asbestos and asbestos-like microfiber particles using atmospheric microwave air plasma

Cited by 21 publications

References 17 publications

Improvement in the prevention of asbestos fibre release from ceiling materials by increasing the penetration of a silicate stabilizer through dilution

Improvement in the prevention of asbestos fibre release from ceiling materials by increasing the penetration of a silicate stabilizer through dilution

Direct Aqueous Mineral Carbonation of Waste Slate Using Ammonium Salt Solutions

A Low Temperature Detoxification Method for Treatment of Chrysotile-Containing Waste Roofing Slate

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