"Effects of Weathering on Microplastic Dispersibility and Pollutant Upt" by Ahmed Al Harraq, Philip J. Brahana et al.

Faculty Publications

Title

Effects of Weathering on Microplastic Dispersibility and Pollutant Uptake Capacity

Authors

Ahmed Al Harraq, Cain Department of Chemical Engineering, Louisiana State University, Baton Rouge, Louisiana 70803, United States.
Philip J. Brahana, Cain Department of Chemical Engineering, Louisiana State University, Baton Rouge, Louisiana 70803, United States.
Olivia Arcemont, Cain Department of Chemical Engineering, Louisiana State University, Baton Rouge, Louisiana 70803, United States.
Donghui Zhang, Department of Chemistry, Louisiana State University, Baton Rouge, Louisiana 70803, United States.
Kalliat T. Valsaraj, Cain Department of Chemical Engineering, Louisiana State University, Baton Rouge, Louisiana 70803, United States.
Bhuvnesh Bharti, Cain Department of Chemical Engineering, Louisiana State University, Baton Rouge, Louisiana 70803, United States.

Document Type

Article

Publication Date

11-16-2022

Abstract

Microplastics are ubiquitous in the environment, leading to a new form of plastic pollution crisis, which has reached an alarming level worldwide. Micron and nanoscale plastics may get integrated into ecological cycles with detrimental effects on various ecosystems. Commodity plastics are widely considered to be chemically inert, and alterations in their surface properties due to environmental weathering are often overlooked. This lack of knowledge on the dynamic changes in the surface chemistry and properties of (micro)plastics has impeded their life-cycle analysis and prediction of their fate in the environment. Through simulated weathering experiments, we delineate the role of sunlight in modifying the physicochemical properties of microplastics. Within 10 days of accelerated weathering, microplastics become dramatically more dispersible in the water column and can more than double the surface uptake of common chemical pollutants, such as malachite green and lead ions. The study provides the basis for identifying the elusive link between the surface properties of microplastics and their fate in the environment.

Publication Source (Journal or Book title)

ACS environmental Au

First Page

549

Last Page

555

Recommended Citation

Al Harraq, A., Brahana, P. J., Arcemont, O., Zhang, D., Valsaraj, K. T., & Bharti, B. (2022). Effects of Weathering on Microplastic Dispersibility and Pollutant Uptake Capacity. ACS environmental Au, 2 (6), 549-555. https://doi.org/10.1021/acsenvironau.2c00036

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