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Removal of microplastics from wastewater: available techniques and way forward

Water Science & Technology 2021 100 citations ? Citation count from OpenAlex, updated daily. May differ slightly from the publisher's own count.
Surya Singh, Madhanraj Kalyanasundaram, Vishal Diwan

Summary

This review surveys the available techniques for removing microplastics from wastewater, including filtration, coagulation, biological treatment, and advanced methods like membrane bioreactors. Researchers found that while conventional treatment plants can remove a substantial fraction of microplastics, significant amounts still pass through to the environment. The study emphasizes the need for upgrading wastewater treatment systems to better capture these emerging contaminants.

Study Type Environmental

Microplastics are the newly emerged contaminants with a presence in almost every part of the globe. Despite being small in size, microplastic particles have proved to be harmful for plants, animals, humans, and for the ecosystem in general. Water is one of the most important routes through which microplastics transfer from one place to another. Moreover, water is also an important route for the ingestion of microplastics in human, which results in various health issues, such as cancer, mutagenic and teratogenic abnormalities. Thus, microplastics in water is an emerging public health issue which needs attention and, hence, it is important to investigate removal techniques for microplastics in wastewater. Although, there are some biological, chemical/electrochemical, and physical techniques to remove microplastics, their wide scale applicability and cost-effectiveness is an issue. In this review, we have discussed the existing and upcoming treatment technologies for the removal of microplastics from wastewater and also tried to present an overview for the future approaches.

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