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Removal of Classical and Emerging Contaminants in Water Treatment Using Super-Bridging Fiber-Based Materials
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Researchers designed iron-grafted cellulose fibers and tested them for removing both classical contaminants and emerging pollutants including microplastics from wastewater, demonstrating high removal efficiency across a broad range of contaminant types in a single treatment step.
New solutions are required to increase the capacity, robustness, and versatility of water treatment plants for both drinking water and wastewater applications. In this work, iron-grafted cellulose fibers were designed and tested for the removal of classical and emerging contaminants in wastewater treatment. The synthesis of Fe-fibers was optimized to maximize the amount of positively charged iron (hydr)oxides grafted onto cellulose to improve the adsorption capacity for negatively charged contaminants such as phosphorus. Compared to conventional physicochemical treatment and ballast treatment, the fibers drastically increased floc size, hence allowing the replacement of settling by screening, a technology that is more compact than settling tanks. Fibers used in combination with coarse screens (mesh size of 1000 μm) improved the removal of total suspended solids from 22% (conventional treatment) to 81% (fiber-based treatment). When fibers were used in combination with a coagulant and a flocculant, nanoplastics removal increased dramatically after separation via screening (1000 μm mesh), from 20 to 71%. For benzene, toluene, ethylbenzene, and xylene (BTEX), cellulose fibers and Fe-grafted fibers removed, respectively, 88 and 80% of the contaminant load. Finally, fibers were proven to be washable and reusable more than five times, which shows potential for operational cost reduction and environmental benefits.
More Papers Like This
Super-bridging fibrous materials for water treatment
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Researchers engineered fiber-based materials that dramatically increase the size of clumped particles (called flocs) during water treatment, reducing the need for chemical additives by up to 60% while also effectively removing emerging contaminants like microplastics and nanoplastics from drinking water.
Impact of fiber-based super-bridging agents on contaminant removal via settling and screening: microplastics, textile fibers, and turbidity
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Researchers added fiber-based super-bridging agents to standard water treatment coagulation and flocculation processes and found they created flocs 10 to 100 times larger than normal, dramatically improving settling. The agents also cut chemical demand by 50% and improved removal of microplastics, textile fibers, and turbidity from water. This approach could make water treatment more efficient and cost-effective while specifically targeting microplastic removal.
Super-bridging Fibrous Materials for Water Treatment: Impacts on Removal of Plastic Particles, Phosphorus and Natural Organic Matter
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Researchers developed fiber-based materials that act as super-bridging agents in water treatment, creating much larger flocs than conventional coagulants alone and improving the removal of plastic particles, phosphorus, and natural organic matter. The materials reduced coagulant and flocculant usage by up to 40-60%, lowering both costs and chemical footprint.
Super-bridging Fibrous Materials for Water Treatment: Impacts on Removal of Plastic Particles, Phosphorus and Natural Organic Matter
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Researchers developed fiber-based materials that act as super-bridging agents in water treatment, creating much larger flocs than conventional coagulants alone and improving the removal of plastic particles, phosphorus, and natural organic matter. This entry appears to be a duplicate of paper 60960 from the same study.
Fibrous super-bridging agents simultaneously improve contaminants removal and sludge dewatering via a very compact three-in-one process
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Researchers developed a compact three-step water treatment process using fibrous bridging agents that simultaneously removes contaminants — including nanoplastics and microplastics — and dewaters sludge more efficiently than conventional methods. This streamlined approach could make clean water treatment more accessible for small towns and underserved communities in developing countries.
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