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Assessing Microplastic Distribution in Indoor Environments: A Case Study of a University Facility in Kuala Lumpur
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Microplastics were detected in the indoor air and settled dust of a Malaysian university building at concentrations averaging 156 particles per cubic metre in offices and 104 in classrooms, with estimated daily adult intakes of over 150 microplastic particles per kilogram of body weight per day. These findings confirm that indoor environments — where people spend the majority of their time — are a significant and often overlooked route of human microplastic inhalation and ingestion.
Abstract Detection of microplastics in indoor air environments has raised concerns related to the potential public health risks associated with exposure. The present investigation examines the prevalence of microplastics in a university facility situated in Kuala Lumpur, Malaysia. Specifically, this study analyzed 24 samples of indoor dust for microplastics in both the classrooms and the offices of the faculty members, which were located on the same floor of the building. Findings indicate that microplastics were found in active samples in the office and classroom with a mean concentration of (156 ± 48 MPs/m 3 ; n = 6) and (104 ± 13 MPs/m 3 ; n = 6) MPs/m 3 , respectively, while deposition rates were 1898 ± 908 MPs/m 2 /day and 3434 ± 624 MPs/m 2 /day for classroom and office respectively. Besides, the estimated daily intake of an adult in the office and classroom was 227 MPs/kg /BW/day and 163 MPs/kg/BW/day, respectively. Findings from the present study indicate that indoor environments are prone to microplastic pollution, although microplastic concentration varies significantly based on the different characteristics of indoor settings.
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