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Effective Removal of Microplastic Particles from Wastewater Using Hydrophobic Bio-Substrates
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Researchers tested natural cattail plant fibers as a low-cost, biodegradable material for removing microplastics from wastewater. The hydrophobic fibers were effective at adsorbing microplastic particles, with removal efficiency influenced by water chemistry and contact time. The study suggests that plant-based bio-adsorbents could offer a sustainable and affordable alternative for filtering microplastics from water treatment systems.
The rapid increase in soil and water pollution is primarily attributed to anthropogenic factors, notably the mismanagement of post-consumer plastics on a global scale. This exploratory research design evaluated the effectiveness of natural hydrophobic cattail (Typha Latifolia) fibres (CFs) as bio-adsorbents of microplastic particles (MPPs) from wastewater. The study investigates how the composition of the adsorption environment affects the adsorption rate. Straightforward batch adsorption tests were conducted to evaluate the “spontaneous” sorption of MPPs onto CFs. Five MPP materials (PVC, PP, LDPE, HDPE, and Nylon 6) were evaluated. Industrial wastewater (PW) and Type II Distilled Water (DW) were employed as adsorption environments. The batch test results show that CFs are effective in removing five MPP materials from DW and PW. However, a higher removal percentage of MPPs was observed in PW, ranging from 89% to 100% for PVC, PP, LDPE, and HDPE, while the adsorption of Nylon 6 increased to 29.9%, a removal increase of 50%. These findings indicate that hydrophobic interactions drive the “spontaneous and instantaneous” adsorption process and that adjusting the adsorption environment can effectively enhance the MPP removal rate. This research highlights the significant role that bio-substrates can play in mitigating environmental pollution, serving as efficient, sustainable, non-toxic, biodegradable, low-cost, and reliable adsorbents for the removal of MPPs from wastewaters.
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Effective Removal of Microplastics Particles from Wastewater using Bio-Substrates
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Researchers evaluated cattail (Typha latifolia) fibres as bio-adsorbents for removing microplastic particles (PVC, PP, LDPE, HDPE, and Nylon 6) from both industrial and distilled wastewater in batch adsorption tests. They found that cattail fibres effectively adsorbed microplastics through spontaneous surface interactions, with adsorption performance varying by plastic type and wastewater composition.
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Researchers found that coating coconut coir (a natural fiber) with biofilm — communities of microorganisms — boosted its ability to capture microplastics from wastewater, achieving 85–95% removal efficiency compared to 72–82% without biofilm. This low-cost, natural approach offers a promising sustainable filter material for tackling microplastic pollution in water treatment systems.
An Innovative Sorption Technology for Removing Microplastics from Wastewater
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This study developed a sorption-based technology for removing microplastics from wastewater using inexpensive natural materials, demonstrating high removal efficiency suitable for deployment as a tertiary treatment stage at wastewater treatment plants or for treating process and surface water.
A critical review of microplastics and nanoplastics in wastewater: Insights into adsorbent-based remediation strategies
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This review analyzes research on removing microplastics and nanoplastics from water using materials that absorb the particles, finding that adsorption is the most widely studied removal method. Carbon-based and metal-based materials currently dominate the research, but plant-based (biopolymer) adsorbents are gaining attention because they are biodegradable and non-toxic. Better removal technologies are critical because conventional water treatment often fails to capture the smallest plastic particles that pose the greatest risk to human health.
Adsorption Isotherms of PP, PVC, PA6, LDPE, and HDPE Microplastic Particles, and Their Blend on a Hydrophobic Bio-Substrate at Three Temperatures and Two Environments
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Researchers tested cattail fluff — a superhydrophobic natural material — as a low-cost adsorbent for five plastic polymer types and their blends, achieving removal capacities up to 3,597 mg/g in distilled water, with the Dubinin–Radushkevich isotherm best describing the predominantly physical adsorption mechanism.
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