Chemical composition of cotton gin external emissions: proximate and elemental analysis
1997
Hughs, S.E. | Wakelyn, P.J. | Rousselle, M.A. | Columbus, E.P.
Seed cotton from producers in Alabama, Arizona, Arkansas, California, Mississippi, Missouri, New Mexico, South Carolina, Tennessee, and Texas was ginned at either the Stoneville or Mesilla Park USDA, ARS Cotton Ginning Laboratories. Particulate emissions during ginning were sampled from the exhausts of the unloader separator and the first lint cleaner. Proximate and X-ray fluorescence analyses were performed on the emission particulate sampled from both exhausts and the particulate captured by the unloader cyclone. Proximate analyses showed that the large constituent of gin emissions is noncellulosic plant material (range of 43 to 66%), followed by cellulose (range of 17 to 40%), with the remainder being inorganic soil particles and water. X-ray fluorescence was used to determine the level 19 different elements including arsenic, lead, and mercury. None of these elements occurred at levels of any concern for meeting either EPA or OSHA regulations and could be attributed primarily to native soil content of the harvested seed cotton.
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