Vitrification of Chromium Electroplating Sludge

Li, Chun‐Teh; Lee, Wen‐Jhy; Huang, Kuo‐Lin; Fu, Sheng-Feng; Lai, Yicheng

doi:10.1021/es062803d

Cited by 87 publications

(41 citation statements)

References 16 publications

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“…Both the EAF fly ash and cullet powders were sieved out using a #100 mesh (with 150 μm pore diameter) metallic sieve before use. Based on our previous studies (Li et al, 2003;Li et al, 2007a), the sieved EAF fly ash and cullet were mixed homogeneously in the mass ratios of 7:3 to adjust the basicity (CaO/SiO 2 in mass) of the mixture.…”

Section: Raw Materialsmentioning

confidence: 99%

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Fate of Polychlorinated Dibenzo-p-dioxins and Dibenzofurans during the Thermal Treatment of Electric Arc Furnace Fly Ash

Lin

Zhou

Shih

et al. 2011

Aerosol Air Qual. Res.

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Thermal treatment is often employed to recover the metals contained in electric arc furnace (EAF) fly ash, which is considered a major source of PCDD/Fs. After the present treatment, the mass and volume of untreated material (EAF fly ash + cullet) were significantly reduced by 44.2 and 89.2%, respectively; meanwhile the density increased significantly by 476%. These results indicate that the mass and volume of EAF fly ash can be effectively reduced to benefit the further disposal in landfill. Additionally, this study also investigated the fate of polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs) during the thermal treatment. For the EAF fly ash with an original PCDD

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Section: Raw Materialsmentioning

confidence: 99%

“…The vitrification approach has been shown to successfully treat hazardous materials, such as fly ash and sludge (Li et al, 2007a;Chou et al, 2009;Kuo et al, 2009;Wang et al, 2010c). There are three kinds of vitrification depending on the heat source: electric melting, burner melting and blast melting.…”

Section: Introductionmentioning

confidence: 99%

Fate of Polychlorinated Dibenzo-p-dioxins and Dibenzofurans during the Thermal Treatment of Electric Arc Furnace Fly Ash

Lin

Zhou

Shih

et al. 2011

Aerosol Air Qual. Res.

View full text Add to dashboard Cite

show abstract

“…Vitrification has been used to successfully treat the hazardous materials in fly ash, sludge and so on (Li et al, 2007a;Chou et al, 2009;Kuo et al, 2009). There are three kinds of vitrification based on the heat source: electric melting, burner melting and blast melting.…”

Section: Introductionmentioning

confidence: 99%

Emissions of Polybrominated Diphenyl Ethers during the Thermal Treatment for Electric Arc Furnace Fly Ash

Lin

Zhou

Shih

et al. 2012

Aerosol Air Qual. Res.

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This study investigated the fate of polybrominated diphenyl ethers (PBDEs) in a thermal treatment system that was employed to recover the metals from the electric arc furnace (EAF) fly ash. After 1450°C thermal treatment, the content of PBDEs in the EAF fly ash (50128 ng/kg) was greatly reduced by 98.9%, based on the solid destruction efficiency (SDE). The sums of five PBDE contents in ingot and slag were 86.0 and 32.3 ng/kg, respectively, revealing that the residual PBDE content in slag was much lower than those in woodland (180 and 710 ng/kg) and grassland (440 ng/kg) soils (Harrad and Hunter, 2006). With this PBDE level, the slag can be either safely disposed of in landfills or utilized as construction material. After the 1450°C thermal treatment and 1200°C secondary combustion, 95.8% of the PBDEs were destroyed or removed without air pollution control devices (APCDs). The PBDE concentrations in cooling unit and filter (APCDs) were 8810 and 327 pg/Nm 3 , respectively, while that in the PUF cartridges (final emission) was 13009 pg/Nm 3 . However, the PBDE concentration of the untreated flue gas was 22.1 ng/Nm 3 , which is still higher than that measured in the exhausts from various stationary sources (15.7-46.7 ng/Nm 3 ) (Wang et al., 2010a, c). Fortunately, the concentration of PBDEs can be effectively reduced to a much lower level (13.0 ng/Nm 3 ) in the flue gas. In addition, after the Pearson correlation analyses, the logarithm contents of PBDEs and PCDD/Fs showed a statistically high correlation (r = 0.930-1.000). Consequently, thermal treatment with APCDs can effectively reduce the PBDEs in EAF fly ash, while the heavy metals can also be recovered.

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“…[1][2][3][4] After vitrification, useful metals can be recovered, with the residue encapsulated by a glassy matrix. 5,6 Organic toxic substances are destroyed, and inorganic hazardous materials are transformed into stable slag.…”

Section: Technical Papermentioning

confidence: 99%

Stabilization of Residues Obtained from the Treatment of Laboratory Waste: Part 2—Transformation of Plasma Vitrified Slag into Composites

Kuo

Tseng

Chang

et al. 2011

Journal of the Air & Waste Management Association

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The Sustainable Environment Research Center of National Cheng Kung University in Taiwan has set up a treatment plant to dispose of laboratory waste. In the treatment process, the residue from the incineration system and the physical and chemical system is vitrified by a plasma melting system. Part 1 of this study described the treatment path of metals during vitrification. In Part 2, plasma vitrified slag is reused by using a molding technology. Unsaturated polyester resin and glass fiber were used as the molding material and additive, respectively, in the molding process. With an appropriate mixing ratio of unsaturated polyester resin, glass fiber, and slag, the physical properties of composites improved, and the ultimate tensile strength reached 17.6 MPa. However, an excess amount of slag reduced the strength and even retarded the production of composites. Differential thermal analysis and the water bathing test results show that the composite decomposed at 80°C and that it vaporized at 187°C. Although the unsaturated polyester resin decomposed, the metal encapsulated in the slag did not leach out. The results show that the reuse of slag using molding technology should be taken into consideration.

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Vitrification of Chromium Electroplating Sludge

Cited by 87 publications

References 16 publications

Fate of Polychlorinated Dibenzo-p-dioxins and Dibenzofurans during the Thermal Treatment of Electric Arc Furnace Fly Ash

Fate of Polychlorinated Dibenzo-p-dioxins and Dibenzofurans during the Thermal Treatment of Electric Arc Furnace Fly Ash

Emissions of Polybrominated Diphenyl Ethers during the Thermal Treatment for Electric Arc Furnace Fly Ash

Stabilization of Residues Obtained from the Treatment of Laboratory Waste: Part 2—Transformation of Plasma Vitrified Slag into Composites

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