Mapping of PM10 concentrations and metal source identifications in air ambient at surrounding area of Padang cement factory

Abstract

Objective: This study aims to map the ambient air quality in the region of Semen Padang factory due to presence PM10 and metals of Ca, Al, Fe, Si and Na. Methodology: Measurements using a low volume sampler and analysis of PM10 concentration using a gravimetric method. Analysis of metal concentrations of Ca, Al, Fe, Si and Na by using spectophotometric atomic absorption method. The PM10 concentration during the day which ranged from 32.64-118.13 μg N m-3, higher than the night that ranged between 22.48-43.41 μg N m-3. Concentration of PM10 during 24 h on the calculation ranges between 28.05-130.77 μg N m-3 and do not exceed the ambient air quality standard that is 150 μg N m-3. Results: Metal concentrations of Na and Si is greater than the metals of Ca, Al and Fe both during the day, while at night the metal of Na is greater than the metal of Si, Ca, Fe and Al. Mapping the concentration of PM10 and metals Ca, Al, Fe, Si and Na with 10 surfers obtained radial spread of concentration during the day where the dominant direction of the spread is to the East, while at night the dominant towards the West and Northwest. Conclusion: The location that has the highest concentration of PM10 and metals both day and night there is at Block D Gadut area within ±1.5 km West of Semen Padang factory.