Department of Occupational Health Engineering;
Faculty of Medical Sciences;
Tarbiat Modares University;
14115-111 Tehran;
Iran;
Department of Environmental Health Engineering;
School of Public Health;
Iran University of Medical Sciences;
14665-354 Tehran;
Iran;
Department of Occupational Health Engineering.School of Public Health;
Mashhad University of Medical Sciences;
13131-99137 Mashhad;
Iran;
sulfur dioxide; packed-bed plasma; glass pellets; ceramic pellets; response surface methodology(RSM);