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Removal of microplastics in water: Technology progress and green strategies
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Researchers reviewed existing technologies for removing microplastics from water, including filtration, magnetic separation, chemical coagulation, and biodegradation. Each method has significant trade-offs — filtration is costly, chemical approaches risk secondary pollution, and biological methods are slow — pointing to the need for integrated, environmentally friendly strategies that combine multiple approaches.
Microplastics (MPs) are globally distributed in aquatic environments, and become a growing threat to the ecosystem. It is urgently needed to develop effective technologies to remove MPs from water. In this review, we summarized progress in major technologies for the removal of MPs. Currently, multiple technologies for MPs removal have been developed including physical, chemical, and biological approaches. Filtration technology has a various removal efficiency, but a relatively high cost due to membrane fouling and replacing new filter membranes. The approach of adsorption and magnetic separation is a simple removal method; however, additive sorbents may cause secondary pollution. There is a similar problem of chemical residua in coagulation and oxidation treatment. In contrast, biodegradation and bioreactors are often of a low degradation efficiency. Then, existing removal technologies were comparatively analyzed in several aspects, especially practical efficiency and environmental impacts. Finally, green strategies for plastic abatement were proposed, including zero pollutant removal technology, integrated environmentally friendly approaches, recycling use of conventional plastic, and developing biodegradable plastic in the future.
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Research digests by email
When a large batch of papers lands in the Atlas, we read through it and send a short write-up of what stood out.