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Are Water Filters Effective Against Microplastics?
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Comparing microplastic concentrations in water from purifiers, tap water, and ceramic filters found ceramic filters had significantly lower MP levels (0.49 MPs/L) compared to purifiers (1.41 MPs/L) and tap water (1.13 MPs/L) across 9,262 identified microplastic items.
Microplastics (MPs) are reported as ubiquitous in the environment. In recent years, these microplastic particles have been found in table salt, seafood, and honey, as well as in drinking water. However, the process by which water reaches households for consumption has not yet been investigated. Thus, we compared the concentration, shape, color, size, and polymer types of MPs in water sources that have passed through different filtration techniques for human consumption such as water purifiers, ceramic filters, and tap water. A total of 9262 items of microplastics were identified in the analyzed water samples. Higher MP concentration (ANOVA, F = 68.16; D.F. = 2; p < 0.01) was observed in water from purifiers (1.41 MPs/L) and taps (1.13 MPs/L) compared to ceramic filter water (0.49 MPs/L). Transparent fibers ranging in size from <500 µ to >5 mm, composed of polyester, polypropylene, and polyamide, were predominant in all water samples. We emphasize that regulations and restrictions related to the production and use of plastics, promotion of environmental education (scientific dissemination) for the population, and the development and popularization of filters that promote the retention of MPs at the source and also in sinks are useful measures for reducing contamination of water bodies and water for human consumption.
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