NIOSHTIC-2 Publications Search
Kaolin pneumoconiosis in a Georgia mill.
Sepulveda M-J; Vallayathan V; Stettler LE; Piacitelli L; Tucker JH
Health issues related to metal and nonmetallic mining. Wagner WL, Rom WN, Merchant JA, eds. Boston, MA: Butterworth, 1983 Jan; :331-344
Results of a health hazard evaluation conducted by NIOSH at a kaolin mill (SIC-3295) in Georgia were summarized. Area and personal air samples were analyzed for respirable dust, crystalline silica (7631869), fibers, and trace metals. Medical evaluations including lung function testing and chest X-ray examinations were performed on 49 current and 21 former workers. The workers were administered a modified version of the British Research Medical Research Council Respiratory questionnaire. Lung tissue biopsy samples from two workers were examined. Airborne dust samples had an elemental composition corresponding to 96 percent kaolinite (12141467) and 4 percent titanium-dioxide (13463677). Total dust exposures at three work stations exceeded 10 milligrams per cubic meter. Baghouse and bin related work had the highest dust exposures. Five mill work stations adjacent to pulverizers and the baghouse had respirable dust fractions exceeding 50 percent. Other locations had 10 to 20 percent respirable dust fractions. No crystalline silica was found in the respirable dust samples. Pneumoconiosis was present in 11 percent of the current workers. Former workers with 5 or more years of kaolin exposure had a 19 percent prevalence rate of pneumoconiosis. Three of eight workers with pneumoconiosis exhibited restrictive, obstructive, and mixed deficits in their lung function. All had prominent smoking histories. The two biopsy specimens exhibited nodular lesions and diffuse fibrosis. The authors conclude that pneumoconiosis has been documented in a group of kaolin workers and that crystalline silica free kaolinite has a definite pathogenic potential.
Health-hazards; Air-sampling; Epidemiology; Particulate-dust; Respirable-dust; Lung-disorders; Lung-fibrosis; Lung-tissue; Mineral-dusts; Occupational-exposure
7631-86-9; 12141-46-7; 13463-67-7
Wagner WL; Rom WN; Merchant JA
Health issues related to metal and nonmetallic mining. Wagner WL, Rom WN, Merchant JA, eds. Boston, MA: Butterworth, 1983 Jan; . Proceedings of the Fourth Annual RMCOEH Occupational and Environmental Health Conference, April 7-9, 1982, Park City, Utah, sponsored by the Rocky Mountain Center for Occupational and Environmental Health
GA; WV; OH; MA; UT
Page last reviewed: August 23, 2019
Content source: National Institute for Occupational Safety and Health Education and Information Division