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<p>Escalating phosphorus (P) pollution and depleting P reserves demand sustainable P control strategies. Here we developed a microbially enhanced La–Zr-loaded basalt (MLZB) system integrating physicochemical adsorption with microbial metabolism for P removal and recovery. Adsorption creates a P-enriched microenvironment that fosters P-solubilizing bacteria, which secrete organic acids to release adsorbed P and regenerate adsorption sites. These bacteria mediate P storage and re-release via polyphosphate metabolism, making P available to eukaryotes. Ultimately, biodiverse microbial communities harbouring key P-metabolic genes were established within MLZB. Over a 1-year continuous treatment of real agricultural non-point source polluted water, this system maintained P removal efficiencies exceeding 90.0%, with its effluent consistently meeting the discharge standard of 0.2 mg l<sup>−1</sup>. The basalt matrix was regenerated, whereas P-containing products were recovered through incineration. MLZB offers an economically superior alternative to traditional chemicals by serving as an effective P cycle medium. It markedly reduces ecological impacts and promotes the development of circular economy.</p>

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Adsorption–microbial integration pioneers sustainable phosphorus cycle

  • 期刊论文

  • 发表日期：

    2026年1月26日

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  • Tianming Wu,
  • Wen-Jie Fu,
  • Zheng Yan,
  • Binggong Li,
  • Zhe Zhao,
  • Lu Wang,
  • Lei Yan,
  • Kaiqing Tong,
  • Gong Zhang,
  • Yusheng Niu

摘要

Escalating phosphorus (P) pollution and depleting P reserves demand sustainable P control strategies. Here we developed a microbially enhanced La–Zr-loaded basalt (MLZB) system integrating physicochemical adsorption with microbial metabolism for P removal and recovery. Adsorption creates a P-enriched microenvironment that fosters P-solubilizing bacteria, which secrete organic acids to release adsorbed P and regenerate adsorption sites. These bacteria mediate P storage and re-release via polyphosphate metabolism, making P available to eukaryotes. Ultimately, biodiverse microbial communities harbouring key P-metabolic genes were established within MLZB. Over a 1-year continuous treatment of real agricultural non-point source polluted water, this system maintained P removal efficiencies exceeding 90.0%, with its effluent consistently meeting the discharge standard of 0.2 mg l−1. The basalt matrix was regenerated, whereas P-containing products were recovered through incineration. MLZB offers an economically superior alternative to traditional chemicals by serving as an effective P cycle medium. It markedly reduces ecological impacts and promotes the development of circular economy.