title: Reduction of pollutants in painting operation and suggestion of an optimal technique for extracting titanium dioxide from paint sludge in car manufacturing industries--case study (SAIPA).
abstract: Paint sludge of car manufacturing industries are not disposed in landfills, since they contain hazardous materials with a high concentration of chromium, aluminum, titanium, barium, copper, Iron, magnesium, strontium, and so on. Thus, it is essential to find solutions in order to neutralize them or suggest cost-effective techniques, which are also environmentally acceptable. Because, this sludge contains considerable amounts of Ti pigments and unbaked resins, recycling these pigments--which could be used in a variety of industries such as paint factories--is an appropriate subject for further research. In this article, with the aim of identification of main pollutants in order to eliminate them and suggest a cost-effective solution to recover the sludge, a large number of tests including X-ray fluorescence spectroscopy, X ray diffraction spectroscopy, and diffusion thermal analysis are conducted to determine types and concentration of elements, and combinations of paint sludge in car manufacturing industries. As titanium dioxide (TiO₂) is widely used as the main pigment of automobile paints, an optimal technique is suggested for extracting TiO₂ with high purity percentage through adopting scientific methods such as membrane and electrolysis.
authors.affiliation: Department of Environment and Energy, Science and Research Branch, Islamic Azad University, Tehran, Iran.
authors.forename: Seyed Mostafa
authors.initials: SM
authors.lastname: Khezri
authors.forename: Seyed Mahmood
authors.initials: SM
authors.lastname: Shariat
authors.forename: Sahar
authors.initials: S
authors.lastname: Tabibian
mesh_terms: D001336:Automobiles; D004055:Differential Thermal Analysis; D006358:Hot Temperature; D006813:Humidity; D007220:Industrial Waste / Q000032:analysis*; D007221:Industry; D010150:Paint / Q000032:analysis*; D012037:Refuse Disposal; D014025:Titanium / Q000302:isolation & purification*; D014961:X-Ray Diffraction
chemical_list: D007220:Industrial Waste; C009495:titanium dioxide; D014025:Titanium