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A preliminary assessment of microplastics in indoor dust of a develo** country in South Asia

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Abstract

Microplastics (MPs) pollution is an emerging global environmental concern. Considering the high fraction of time people spend indoors, the human population can be directly exposed to this contamination through indoor dust. This preliminary study evaluates MPs’ abundance and human health risk assessment in the deposited indoor dust. A total of forty dust samples (n = 20) were collected from homes in two different cities (Pakistan) in steel mesh pouches using the vacuum cleaner. The identification and quantification of MPs were conducted with a stereo microscope, whereas the qualitative assessment was performed with Fourier transform infrared spectroscopy (FTIR). The US EPA parameters to calculate the human health risk assessment were used to determine MPs’ risk per-day/month/year. Overall, microfibers were the dominant category, followed by microfilms, micro-fragments, and nurdles. The chemical categorization of MPs was revealed as polyester, polyethylene, copolymers of polypropylene, and polyurethane. In Lahore, an average abundance of 241.45 (items/m2) MPs were observed compared to Sahiwal, with 162.1 (items/m2). More than 90% of the identified MPs were microfibers, with higher detection frequency and abundance in Lahore than Sahiwal. The human health risk assessment revealed high exposure risk because of indoor MPs. Moreover, toddlers were more vulnerable as compared to adults at both low and high exposure risk scenarios. There is an imminent need to conduct in-depth risk assessment focusing on the respirable fraction of MPs.

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Acknowledgements

The authors would like to thank the Higher Education Commission of Pakistan for providing funds under the National Research Program for Universities (NRPU No: 8463/Punjab/ NRPU/R&D/HEC/ 2017) to carry out this extensive research.

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  1. College of Earth and Environmental Sciences, University of the Punjab, Lahore (54590), Pakistan

    Iqra Aslam, Abdul Qadir & Sajid Rashid Ahmad

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Aslam, I., Qadir, A. & Ahmad, S.R. A preliminary assessment of microplastics in indoor dust of a develo** country in South Asia. Environ Monit Assess 194, 340 (2022). https://doi.org/10.1007/s10661-022-09928-3

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