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Microplastics in Sharjah's Groundwater: Enumeration, Characterization and Spatial Distribution
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Microplastics were detected in groundwater boreholes across the Rahmaniya and Falah regions of Sharjah, UAE, with concentrations ranging up to 235 particles per liter, and identified as polyethylene terephthalate, polyethylene, and polypropylene. Since groundwater supplies more than half of the UAE's water, these findings raise significant drinking water safety concerns and point to nearby landfills and industrial areas as likely contamination sources.
The global production of plastics is projected to continue rising with increasing consumption.Plastics break down in the environment, leading to the formation of microplastics.Despite the growing concern over microplastic pollution, there have been limited studies assessing its contamination in groundwater.This may be attributed to the lack of monitoring efforts specifically focused on microplastics in groundwater.In the UAE, groundwater accounts for more than half of the water supply.Therefore, the main objective of this study was to investigate the presence of microplastics in groundwater in the UAE.The study identified 30 groundwater boreholes in the Rahmaniya, Bedee, and Falah regions of Sharjah, UAE, from which samples were collected.To prepare the samples, a series of pretreatment procedures involving 30% hydrogen peroxide, density separation, and extraction filters were employed.Microplastics were subsequently detected using a microscope with 40x magnification, revealing the presence of microplastics in the water of 11 boreholes in Rahmaniya, ranging from 12 to 235 n/L, respectively.In the Falah area, contamination was observed in two boreholes, with 56 and 41 n/L, respectively, while no contamination was found in the Bedee area.Characterization of microplastics was conducted using ATR-FTIR analysis, which has successfully matched the obtained spectra with polyethylene terephthalate, polyethylene, and polypropylene for 10 samples.GIS analysis, using IDW interpolation, highlighted significant microplastics contamination in Rahmaniya.The study also identified potential sources of contamination, including industrial areas, the Sajaa landfill, Bedee Farmland, and the water dump lagoon.
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