Removal of Microbeads from Wastewater Using Electrocoagulation.
William Perren1, Arkadiusz Wojtasik1, Qiong Cai1
1Department of Chemical & Process Engineering, Faculty of Engineering and Physical Sciences, University of Surrey, Guildford, Surrey GU2 7XH, U.K.
Electrocoagulation (EC) effectively removes over 90% of microplastics from wastewater. This study optimized EC parameters, finding optimal conditions for efficient and energy-saving microplastic remediation.
Area of Science:
- Environmental Science
- Water Treatment Engineering
- Materials Science
Background:
- Microplastic pollution poses a significant threat to marine ecosystems.
- Effective removal of microplastics from wastewater is crucial for environmental protection.
- Established water treatment processes require evaluation for microplastic remediation.
Purpose of the Study:
- To investigate the efficacy of electrocoagulation (EC) for microplastic removal from wastewater.
- To determine the influence of operational parameters on EC's microplastic removal efficiency.
- To assess the economic viability and energy efficiency of EC for microplastic remediation.
Main Methods:
- Utilized artificial wastewater spiked with polyethylene microbeads.
- Employed a 1 L stirred-tank batch reactor for electrocoagulation experiments.
- Investigated the effects of initial pH, NaCl concentration, and current density on removal efficiency.
Main Results:
- Achieved microplastic removal efficiencies exceeding 90% across various conditions.
- Optimal removal efficiency of 99.24% was observed at pH 7.5.
- Identified 0-2 g/L NaCl concentration and low current density (11 A/m²) as optimal for cost-effective and energy-efficient operation.
Conclusions:
- Electrocoagulation is a highly effective technology for removing microplastics from wastewater.
- Optimized EC parameters enhance removal efficiency and reduce operational costs.
- EC offers a promising solution for mitigating microplastic pollution in aquatic environments.
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