Abstract
Fifteen residence houses at different distances from a nearby limestone quarry were chosen to determine the concentration of elements in an indoor dust study. The samples were collected using a brush and a plastic dust pan. The elements concentrations were determined by wet digestion method with analysis using inductively coupled plasma–optical emission spectrometer (ICP-OES). The results show that the mean elements concentrations in residences houses were in the range 7.96 - 21.19, 0.21 – 0.83, 1.29 – 4.57, 0.14 – 0.26, 0.01 – 0.04 and 0.01 – 0.03 mgkg-1 for Ca, Mg, Fe, Ni, Pb and Zn respectively. The elements concentration in the investigated residential buildings areas were followed the order Ca > Fe > Mg > Zn > Ni > Pb. The evaluation of the elements contamination status of the indoor dust was carried out by using the geoaccumulation index (Igeo). Geoaccumulation index (Igeo) reveal that indoor dust of residential buildings was strongly polluted (Igeo > 5) with Ca, Mg and Fe.
Highlights
Rapid economic progress and the increased population growth, had made many residential development and township to expand and grow
Element in indoor dust at residential building could be derived from indoor and outdoor sources, the result of this study indicated that major influence was from outdoor sources which can be suggested from quarry activities and street dust
The elements analysis of indoor dust sample in selected residential building in this study help to explain the influence of nearby quarry activities to the concentration of elements of indoor dust
Summary
Rapid economic progress and the increased population growth, had made many residential development and township to expand and grow. The quarrying process consists of stockpiling, loading, transportation and processing of minerals material of the quarry [3] All of these processes will contribute to the emission of quarry mining dust. Outdoor surrounding and residents’ activities can give contribution to the indoor dust at the same time effects elements concentration. The outdoor activities such as quarrying, industrial and construction activities produced dust and have high possible to penetrate indoor environment. This study was aimed to identify and measure the concentration of elements in indoor dust and to calculate the Geo-accumulation Index (Igeo) to evaluation the contamination status of elements in indoor dust at residential buildings nearby the quarry sites
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