Resumo

CHUI BETANCUR, Heber Nehemías; ACOSTA NAJARRO, Dwight Roberto  e  ROQUE HUANCA¹, Bernardo. Identification of fine particulate material (pm2.5) by electron-microscopy scanning, neighboring the cesur cement plant of the district of Caracoto, Puno, Peru . Rev. Bol. Quim [online]. 2017, vol.34, n.3, pp.72-78. ISSN 0250-5460.

In this paper, the average percentage of PM_2.5 particulate matter and the chemical composition of the sediments deposited on roofs constructed with corrugated metal sheets of houses near the industrial cement plant was determined. The particle size distribution was calculated by means of the ImageJ software version 1.50i, using the B1, B2 and B3 micrographs obtained with the Scanning Electron Microscope, as a result: 5% of the particles had a size greater than 10μm (> PM₁₀) on average, 39% of the particles had sizes between 2.5μm - 10μm (PM_10-2.5) on average and 56% of particles had sizes smaller than 2.5μm (<PM_2.5), these particles <PM_2.5 being the most harmful to health and are associated with diseases such as pneumonia, asthma and child bronchitis. The particles are composed of: O, Ca, Mg, Na, Si, S, Fe, Ti, K, Al; these chemical elements are characteristic of the crystalline phases of each cement manufacturing process, while the elements:  Pu, Zn, Cl are present in the side that was next to the ceiling, since these are covered by an alloy of 55% of Al and 43% of Zn.

Palavras-chave : Particulate matter; Pneumonia; Asthma; Bronchitis; Caracoto; Cement plant.

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