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

Abstract

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.

Polychlorinated Dibenzo-p-dioxin and Dibenzofuran (PCDD/F) Emission Behavior during Incineration of Laboratory Waste. Part 1: Emission Profiles Obtained Using Chemical Assay and Bioassay

“…Due to the complex composition and varying quality of LW, it is much more difficult to treat LW than it is to treat other industrial waste. The Ministry of Education has thus financially supported the Sustainable hazardous materials are transformed into stable slag, and the slag can be further remade composite with polyester resin (Kuo et al, 2011).…”

Práticas ambientais em laboratórios químicos universitários: uma revisão sistemática de literatura

“…A Figura 2 ilustra como essas categorias foram elencadas, bem como os principais resultados encontrados na revisão sistemática da literatura. Alves et al, 2005;Benatti et al, 2006;Zweckmair et al, 2017), seguido pela reutilização e reciclagem de resíduos com 18 (Kuo et al, 2011;Silva et al, 2015) e segregação/caracterização/coleta seletiva dos resíduos representado por 15 artigos (Smith, Fredeen & Booth, 2010;Zach, 2000). Esse resultado condiz com o princípio da química verde de priorizar a prevenção frente à geração de resíduos (Lenardão, Freitag, Dabdoub, Batista & Silveira, 2003).…”

Evaluation of Thermal Treatments for Elutriated Mixed Incinerator Ashes. Part 1: Co-Incineration with Laboratory Waste

“…It is not suitable to solidify the RMA with cement because of its high levels of Cl and PCDD/Fs. It is therefore sent to the plasma melting system for final disposal (Kuo et al, 2011).…”

“…The hazardous materials are transformed via vitrification into stable slag, which can be made into a composite with polyester resin (Kuo et al, 2011).…”