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Removal of microplastics by electrocoagulation
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Researchers investigated electrocoagulation (EC) as a microplastic removal method using a fractional factorial design to evaluate electrode type, contact time, agitation speed, and current density, finding that an aluminum anode at 20 A/m2 and 70 rpm achieved 98.04% microplastic removal within 15 minutes with high model accuracy (R2 = 0.99).
With the gradual increase of microplastics in water bodies, it is essential to understand the current treatment processes for their removal. This study aims to investigate the removal of microplastics in synthetic solution by electrocoagulation (EC). The effects of electrode type, contact time (min), agitation speed (rpm) and current density (A/m²) were evaluated using a fractional factorial design. The results showed that the aluminum anode achieved a higher removal of microplastics than the iron anode, reaching 98.04% removal with the aluminum operational configuration within 15 min at 70 rpm and a current density of 20 A/m². A high correlation between the predicted and observed removal was evidenced, with values of R²= 0.99 and adjusted R²= 0.98, indicating a good agreement between the model and the experimental data, confirming the validity and feasibility of the adopted linear model. This study demonstrates that the electrocoagulation process has a great potential for the removal of microplastics.
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Researchers optimized an electrocoagulation process using aluminum electrodes to remove microplastics from biological wastewater treatment plant effluent. Using Taguchi experimental design, they identified the most important process variables affecting removal efficiency, including current density and treatment time. The study demonstrates that electrocoagulation can be an effective supplementary treatment step for reducing microplastic discharge from wastewater facilities.
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This study evaluated electrocoagulation with aluminum electrodes for removing polyethylene microbeads from water, testing the effects of electrode distance, stirring speed, and contact time. The optimized conditions achieved high removal efficiency, demonstrating electrocoagulation as a viable method for microbead-containing greywater treatment.
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Researchers evaluated the use of electrocoagulation for removing micropolystyrene particles from synthetic wastewater, testing variables like electrode material, current density, and particle size. They found that the process was effective at removing microplastics, with aluminum electrodes and higher current densities achieving the best results. The study supports electrocoagulation as a viable treatment technology for reducing microplastic loads in wastewater.
Experimental Investigation of Microplastic Removal from Drinking Water Using Aluminium Electrocoagulation: Process Performance and Operating Parameters
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Researchers tested a method called electrocoagulation, which uses aluminium electrodes and electricity, to remove microplastic particles from real drinking water samples in a small lab reactor. Under optimised settings, the process removed about 80% of microplastics, working best at near-neutral pH and moderate electrical current.
Response Surface Methodology for Optimizing Electrocoagolation-based Removal of Polypropylene Microplastics from Wastewater: Efficiency Comparison of Rubber and Thermoplastic-Derived Particles
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This study optimized electrocoagulation for polypropylene microplastic removal from wastewater, achieving 97% efficiency at a cost of roughly $0.23 per cubic meter under ideal pH and current density conditions, with over 90% efficiency across all tested plastic types. The results offer a cost-effective, scalable treatment approach that could significantly reduce microplastic discharge into aquatic environments from municipal and industrial wastewater.
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