Blood markers among residents from a coal mining area.

Coal extraction and processing generate environmental contamination, which has several negative impacts on human health. Hematological and biochemical parameters are effective biomarkers of the exposure of a population to air pollutants. Thus, this study aimed to evaluate hematological and biochemical parameters in adult residents in a coal mining region in the largest national reserve in Brazil, as well as to investigate their relations with air quality. The study included three cities in the south of Brazil, which are located near an important power plant and coal mine. The air quality was analyzed by PM10, NOx, and SO at five air quality monitoring stations, socioeconomic and demographic characteristics were evaluated with a questionnaire, and biochemical parameters were assessed in blood samples. The mean PM10 in the study area was 19.18 μg/m. The air quality varied among the five monitoring stations, and the Candiota station exceeded the reference limit by 63.3%. In general, participants had lived more than 10 years in the municipality and had hepatic and renal parameters within the reference values. A higher prevalence of alterations was found in hematological parameters (43.1%) and liver function (30%). Among the three cities, the population of Pedras Altas seems to have a greater impairment of the blood parameters evaluated. The only parameter that was correlated with PM10 was the hematocrit level (r = 0.33; P < 0.001).