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<p>Algal blooms, caused by excessive microalgae growth, threaten water quality, aquatic ecosystems and human health by releasing cyanotoxins and unpleasant odours. Conventional algae elimination methods, including the use of copper sulfate algaecides, are chemically intensive and environmentally unsustainable. This study introduces an innovative filtration system featuring a zero-valent copper microporous filter (CuMF), offering a sustainable solution for aquaculture systems susceptible to algal blooms and associated harmful by-products. The CuMF achieves 100% algae retention while maintaining an ultrahigh water permeability (11,700 l m<sup>−2</sup> h<sup>−1</sup> bar<sup>−1</sup>), markedly outperforming conventional polymeric filters. Furthermore, the CuMF facilitates spontaneous Cu(III) generation for selective oxidation of extracellular organic matter via interfacial electron transfer while preserving algal cells for resource recovery. In aquaculture systems impacted by harmful algal proliferation, this filtration system delivers long-term stability, high-concentration algal biomass recovery, and efficient removal of algal toxins, odorous compounds, micropollutants, antibiotic resistance genes, and viruses, enabling closed-loop water reuse. Techno-economic analysis and life-cycle assessment validate the feasibility of CuMF, with a 64.8% reduction in economic costs and a 77.5–97.2% decrease in environmental impacts across 21 categories, compared with using algaecides. These findings position the CuMF as an innovative and environmentally sustainable solution for mitigating algal blooms and advancing resource-efficient, circular aquaculture.</p>

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Advancing sustainable aquaculture with a zero-valent copper filter system

  • 期刊论文

  • 发表日期：

    2026年7月27日

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  • Tingting Zhu,
  • Wen Zhang,
  • Junwei Zhang,
  • Xia Liu,
  • Yifei Wang,
  • Siyu Zhang,
  • Li Yan,
  • Yunfei Tan,
  • Ruiping Liu,
  • Chengzhi Hu,
  • Jiuhui Qu,
  • Menachem Elimelech,
  • Meng Sun

摘要

Algal blooms, caused by excessive microalgae growth, threaten water quality, aquatic ecosystems and human health by releasing cyanotoxins and unpleasant odours. Conventional algae elimination methods, including the use of copper sulfate algaecides, are chemically intensive and environmentally unsustainable. This study introduces an innovative filtration system featuring a zero-valent copper microporous filter (CuMF), offering a sustainable solution for aquaculture systems susceptible to algal blooms and associated harmful by-products. The CuMF achieves 100% algae retention while maintaining an ultrahigh water permeability (11,700 l m−2 h−1 bar−1), markedly outperforming conventional polymeric filters. Furthermore, the CuMF facilitates spontaneous Cu(III) generation for selective oxidation of extracellular organic matter via interfacial electron transfer while preserving algal cells for resource recovery. In aquaculture systems impacted by harmful algal proliferation, this filtration system delivers long-term stability, high-concentration algal biomass recovery, and efficient removal of algal toxins, odorous compounds, micropollutants, antibiotic resistance genes, and viruses, enabling closed-loop water reuse. Techno-economic analysis and life-cycle assessment validate the feasibility of CuMF, with a 64.8% reduction in economic costs and a 77.5–97.2% decrease in environmental impacts across 21 categories, compared with using algaecides. These findings position the CuMF as an innovative and environmentally sustainable solution for mitigating algal blooms and advancing resource-efficient, circular aquaculture.