Effect of plasma treatment on Ni molecular environment in a spent catalyst and a plating sludge

Lin, Yong Yang; Yang, Jing Qiang; Wang, H. Paul; Hsiung, Tung Li

doi:10.1016/j.elspec.2006.12.026

Cited by 7 publications

(4 citation statements)

References 9 publications

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“…Previous studies reported that a plasma reactor can be used to vitrify fly ash, sludge, and catalysts. [15][16][17][18] However, few papers have focused on the vitrification of residues from the treatment of LW.…”

Section: Introductionmentioning

confidence: 99%

Stabilization of Residues Obtained from the Treatment of Laboratory Waste. Part 1—Treatment Path of Metals in a Plasma Melting System

Kuo

Chang

et al. 2010

Journal of the Air & Waste Management Association

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The objective of this study is to investigate the treatment path of metals during the plasma vitrification of fly ash, bottom ash, sludge, and activated carbon collected from a laboratory waste treatment plant. Sampling, digestion, and analysis procedures that followed the standard methods of the Taiwan Environmental Protection Administration were used to determine the composition of the input and output materials. The microstructure was qualitatively examined using a scanning electron microscope. The results show that the vitrification process successfully vitrified the toxic input materials into a stable, glassy, amorphous slag. During vitrification, metals with low boiling points (As, Cd, Hg, Pb, and Zn) were vaporized into the flue gas. Metals with high boiling points and high specific weights went into the ingot, and the residual metals remained in the molten materials as the slag. The distribution of metals shows their behavior during vitrification and can provide a reference for vitrifying hazardous materials.

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Section: Introductionmentioning

confidence: 99%

Stabilization of Residues Obtained from the Treatment of Laboratory Waste. Part 1—Treatment Path of Metals in a Plasma Melting System

Kuo

Chang

et al. 2010

Journal of the Air & Waste Management Association

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“…Among these technologies, vitrification is energy consuming but effective in treating ashes [8]. In addition, it can also treat various hazardous materials such as fly ash, spent catalysts, sewage sludge, and radioactive waste [9][10][11][12]. It has been reported that using vitrification to treat incinerator ashes reduces the volume of wastes, immobilizes heavy metals, destroys organic toxics, and recovers valuable metals [13][14][15].…”

Section: Introductionmentioning

confidence: 98%

Chemical and physical properties of plasma slags containing various amorphous volume fractions

Kuo¹,

Wang²,

Tsai³

et al. 2009

Journal of Hazardous Materials

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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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Effect of plasma treatment on Ni molecular environment in a spent catalyst and a plating sludge

Cited by 7 publications

References 9 publications

Stabilization of Residues Obtained from the Treatment of Laboratory Waste. Part 1—Treatment Path of Metals in a Plasma Melting System

Stabilization of Residues Obtained from the Treatment of Laboratory Waste. Part 1—Treatment Path of Metals in a Plasma Melting System

Chemical and physical properties of plasma slags containing various amorphous volume fractions

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

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