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Microplastic in an Arid Region: Identification, Quantification and Characterization on and Alongside Roads in Al Ain, Abu Dhabi, United Arab Emirates

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Journal of Environmental Protection 2022年第10期13卷 671-688页

作者： Rana Zeeshan Habib tholkappiyan ramachandran Fathalla Hamed Ruwaya Al Kindi Abdel-Hamid Ismail Mourad Thies Thieman Department of Biology College of Science United Arab Emirates University Al Ain Abu Dhabi United Arab Emirates Department of Mechanical and Aerospace Engineering College of Science United Arab Emirates University Al Ain Abu Dhabi United Arab Emirates Department of Physics College of Science United Arab Emirates University Al Ain Abu Dhabi United Arab Emirates Department of Chemistry College of Science United Arab Emirates University Al Ain Abu Dhabi United Arab Emirates

Microplastic content was analyzed in road dust, soils alongside roads and stormwater run-offs in Al Ain City, Abu Dhabi. Apart from tire wear material, fibers and degradation products of meso- and macroplastics such as plastic bags and plastic bottle tops were found to be the most dominant plastic microparticles. Speed bumps and artificial turf/lawns were also evaluated as potential sources of microplastics on and alongside roads. It was found that in arid regions Aeolian transport of microplastics may be more important than transport by water.

关键词： Road Wear Microplastic Artificial Turf Glass Reflector Beads Speed Bumps

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Analysis of the Solid Contents of Toothpastes Available in UAE (United Arab Emirates) Markets

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Journal of Environmental Protection 2022年第7期13卷 539-556页

作者： Marim Elkashlan Vijo Poulose Rana Zeeshan Habib Obaida Karabala Afnan Aldhanhani Maryam Shakir Heba Shaath tholkappiyan ramachandran Abdel-Hamid Ismail Mourad Fathalla Hamed Ruwaya Al Kendi Thies Thiemann Department of Chemistry College of Science United Arab Emirates University Al Ain United Arab Emirates Department of Biology College of Science United Arab Emirates University Al Ain United Arab Emirates Department of Mechanical and Aerospace Engineering College of Engineering United Arab Emirates University Al Ain United Arab Emirates Department of Physics College of Science United Arab Emirates University Al Ain United Arab Emirates

In order to find out whether any toothpastes commercially available in the United Arab Emirates (UAE) carry microplastic content in form of plastic microbeads, the filterable solid contents of 31 toothpastes from UAE markets and 2 toothpastes imported from Syria were analyzed. FT-IR studies of the solids revealed that the major solid components were hydrated silica and calcium carbonate, where the individual toothpaste product exhibited either one or the other as the dominant constituent. Titrimetric analysis of the alkalinity of the ash of the toothpastes was carried out. The solids, ashed at 600°C were subjected to FT-IR and EDS (energy dispersive X-ray spectroscopic) analysis. The ash of some of the products was shown to have TiO2 and Ca3 (PO4)2 as minor components. Mostly organic dyes were used as colorants;however, iron oxide (Fe2O3) was also found. Importantly, none of the toothpastes carried any solid microplastic particles. Only 3 toothpastes carried microbeads at all, which were made of either silica or microcrystalline cellulose. This finding indicates that toothpastes, at least in the UAE, are no longer a significant source of microplastic in the environment. The results were compared to a toothpaste bought through the internet with a formulation from 2014, which exhibited polythene microplastic at 1.31 ± 0.39 w% of the filterable solid content.

关键词： Toothpastes Formulation Microplastic Plastic Pollution Colorants

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Microplastic in an Arid Region: Identification,Quantification and Characterization on and Alongside Roads in Al Ain, Abu Dhabi, United Arab Emirates

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Journal of Environmental Protection 2022年第10期

作者： rana zeeshan habib tholkappiyan ramachandran fathalla hamed ruwaya al kindi abdel-hamid ismail mourad thies thiemann

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