title: 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 degrees C and that it vaporized at 187 degrees 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.
authors.affiliation: Department of Safety Health and Environmental Engineering, Chung Hwa University of Medical Technology, Tainan, Taiwan, Republic of China. yiming@mail.hwai.edu.tw
authors.forename: Yi-Ming
authors.initials: YM
authors.lastname: Kuo
authors.forename: Ho-Jung
authors.initials: HJ
authors.lastname: Tseng
authors.forename: Juu-En
authors.initials: JE
authors.lastname: Chang
authors.forename: Chih-C
authors.initials: CC
authors.lastname: Chao
authors.forename: Chih-Ta
authors.initials: CT
authors.lastname: Wang
authors.forename: Guo-Ping
authors.initials: GP
authors.lastname: Chang-Chien
authors.forename: Jian-Wen
authors.initials: JW
authors.lastname: Wang
mesh_terms: D004055:Differential Thermal Analysis; D005898:Glass; D008422:Materials Testing; D008670:Metals / Q000032:analysis; D011091:Polyesters; D059027:Recycling; D012117:Resins, Synthetic; D058989:Vitrification; D014866:Waste Products / Q000032:analysis
chemical_list: D008670:Metals; D011091:Polyesters; D012117:Resins, Synthetic; D014866:Waste Products; C009753:fiberglass