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Microplastics Are Contaminants of Emerging Concern in Freshwater Environments: An Overview
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This overview examines the emerging problem of microplastic contamination in freshwater environments, covering sources, occurrence, and potential effects on aquatic ecosystems. The authors discuss how microplastics enter lakes and rivers through wastewater treatment plants, runoff, and degradation of larger plastic debris. The review highlights that freshwater microplastic pollution deserves the same research attention as marine contamination, given that rivers serve as major transport pathways for plastics reaching the ocean.
In recent years, interest in the environmental occurrence and effects of microplastics (MPs) has shifted towards our inland waters, and in this chapter we provide an overview of the issues that may be of concern for freshwater environments. The term ‘contaminant of emerging concern’ does not only apply to chemical pollutants but to MPs as well because it has been detected ubiquitously in freshwater systems. The environmental release of MPs will occur from a wide variety of sources, including emissions from wastewater treatment plants and from the degradation of larger plastic debris items. Due to the chemical makeup of plastic materials, receiving environments are potentially exposed to a mixture of micro- and nano-sized particles, leached additives, and subsequent degradation products, which will become bioavailable for a range of biota. The ingestion of MPs by aquatic organisms has been demonstrated, but the long-term effects of continuous exposures are less well understood. Technological developments and changes in demographics will influence the types of MPs and environmental concentrations in the future, and it will be important to develop approaches to mitigate the input of synthetic polymers to freshwater ecosystems.
More Papers Like This
Microplastics as Emerging Contaminants
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This review examines microplastics as emerging contaminants in freshwater resources, covering their sources, distribution, and potential health and ecological effects. Researchers summarize evidence of microplastic contamination in rivers, lakes, and drinking water and discuss the inadequacy of current water treatment to fully remove these particles. The paper calls for more research and regulatory attention to microplastics as a freshwater contaminant.
Sources, Occurrence, and Analysis of Microplastics in Freshwater Environments
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This review summarizes current knowledge on microplastic sources and occurrence in freshwater environments, noting that freshwater systems are major conduits delivering microplastics to the ocean. The review highlights that freshwater microplastic research lags far behind marine studies despite rivers and lakes being primary pollution pathways.
Microplastic contamination, an emerging threat to the freshwater environment: a systematic review
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Researchers systematically reviewed the spread of microplastics in freshwater ecosystems — rivers, lakes, and streams — documenting their sources, how they move through water, the damage they cause to aquatic organisms, and the methods used to detect them. Their review serves as a baseline reference for future research and calls for improved waste management to protect freshwater environments from ongoing microplastic contamination.
Microplastics in freshwater systems: A review on occurrence, environmental effects, and methods for microplastics detection
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This review summarizes the current understanding of microplastic contamination in freshwater systems, from sources like wastewater treatment plants to their effects on aquatic life. Researchers note that microplastics can carry toxic chemicals and have been shown to cause intestinal damage and metabolic changes in fish. The paper highlights that freshwater microplastic pollution is a significant and growing concern that warrants more research attention.
Microplastic Pollution in Fresh Water
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This review summarizes current knowledge on microplastic pollution in freshwater systems, covering sources such as atmospheric deposition, stormwater runoff, and wastewater, as well as the diverse shapes, sizes, and polymer types found in rivers and lakes. The authors highlight that freshwater microplastic contamination is comparable in scale to marine contamination and that the pathways to human health via drinking water and food supply demand urgent policy attention.
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