Aerosols concentration in the Candiota area applying different gravimetric methods of sampling and numeric modelling

摘要

The main purpose of the present work is to study the concentration of atmospheric particles in the Candiota region, in the state of Rio Grande do Sul, where the Presidente Medici coal power palnt is located. Aerosol samples were collected at the studied locations between December 2000 and December 2001 during 24h periods at 15 day itervals using HV PM_(10) and dichotomous samplers. Then, the values obtained with the ISCST (Industrial Source Complex Term) model, with the HV PM_(10) sampler at all studied stations, and with the dichotomous sampler at the 8 de Agoto station were compared with each other. The results show that the values for the model had been underestimated in relation to the HV PM_(10) data for the studied stations, but agreed with the values obtained with the dichotomous sampler.