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Hidden pathways: Detection and quantification of microplastics across treatment stages of pharmaceutical WWTPs
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Pharmaceutical factories are releasing tiny plastic particles into wastewater, and even after treatment, more than half of these particles still make it through into rivers and streams. Researchers found the water leaving these plants still contained hundreds of microplastic particles per liter, mostly tiny white plastic fragments that can break down further once released into the environment. This matters because as these microplastics spread through waterways, they can accumulate in fish and other wildlife, eventually working their way into the food we eat and raising concerns about long-term health effects.
Recently, it has been recognised that the pharmaceutical industry has emerged as a new source of microplastic contamination, particularly when treated wastewater is discharged into aquatic systems. Microplastics have been widely reported in aquatic animals, the terrestrial environment, and food systems, but the prevalence and characteristics of microplastics associated with the pharmaceutical industry remain poorly understood. This study investigates the degree of microplastic contamination, along with its loading and retention capacity, in samples collected from various treatment processes at five pharmaceutical industrial plants. Microplastics found in influent and effluent samples ranged from 720 to 920 particles/L and 170-490 particles/L, respectively. Similarly, the loading and retention capacities between the influent and effluent range from 0.99 to 1.90 × 10 and 54.76-67.07%, respectively. Microplastics were categorised by size, shape, and color using an optical microscope, with white (3290 ± 765.44 particles), fragment (4270 ± 522.2 particles), and size (100-500 µm) being predominantly identified in all samples of the treatment process. Polymer compositional analysis revealed that polyethylene was the most abundant. Further, the effluent samples were evaluated using a conditional fragmentational model and SEM analysis, which indicates that microplastics may likely be produced by the breakdown of larger plastic material under stressor environmental conditions of EC and pH, which play a role in MPs distribution, polymer characterisation and morphology. Additionally, the environmental risk assessment indicates varying ecological risks posed by effluent microplastics and emphasises the need to mitigate microplastic pollution to maintain ecosystem and human health.
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Treatment of Microplastics from Pharmaceutical Industrial Wastewater
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Pharmaceutical manufacturing generates wastewater containing microplastics from plastic equipment, packaging, and processing materials, a source of contamination that surged during the COVID-19 pandemic as drug production ramped up. This review examines the nature of microplastic contamination in pharmaceutical wastewater and evaluates treatment techniques for removing these particles before discharge. Addressing this overlooked industrial source is important for reducing microplastic loads entering water systems from healthcare and pharmaceutical infrastructure.
Wastewater treatment plants’ contribution in microplastics’ contamination of surface water. Effluent concentration and detection techniques review
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Wastewater treatment plants remove most microplastics (tiny plastic bits under 5mm) from sewage, but even the small fraction that slips through adds up fast, some plants may release millions of these particles into rivers and lakes every single day. This review of existing studies matters because these waterways often connect back to our drinking water and food supply, meaning the plastic pollution we flush away could eventually make its way back to us.
Size- and Polymer-Specific Assessment of Micro- and Nanoplastics in a European Wastewater Treatment System
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Scientists studied tiny plastic particles in European wastewater treatment plants and found that these facilities can remove most microplastics from sewage, but many still escape into the environment. Even though the treatment plants filter out a lot of plastic pollution, the enormous amount of wastewater they process means millions of plastic particles still end up in rivers and oceans every day. This matters because these plastic particles can eventually make their way into our drinking water and food chain, potentially affecting human health.
Wastewater treatment plants as a source of microplastics to the environment.
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This study was the first to characterize the contribution of a wastewater treatment plant to microplastic pollution in a receiving water body, confirming that plants are significant sources of microplastics despite removing the majority of particles. The findings highlight the need to upgrade treatment processes or implement new technologies specifically targeting microplastic removal.
Toward a Better Understanding of the Contribution of Wastewater Treatment Plants to Microplastic Pollution in Receiving Waterways
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This review examines how wastewater treatment plants (WWTPs) contribute to microplastic pollution in receiving waterways, synthesizing evidence on removal efficiencies of different treatment stages and the characteristics of microplastics that escape into the environment. Researchers found that while WWTPs remove the majority of incoming microplastics, they remain a significant source of microplastic discharge due to the large volumes of wastewater processed daily.
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