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<p>Triclosan (TCS), a widely utilized antimicrobial agent, poses significant threats to ecosystem stability and public health due to its environmental persistence and bioaccumulative potential. This research systematically investigates the enrichment and distribution mechanisms of TCS in aquatic-sedimentary-plant integrated systems, while evaluating the synergistic the collaborative remediation performance and associated eco-physiological regulation mechanisms through strategic co-cultivation of submerged (<i>Vallisneria natans</i>), emergent (<i>Acorus calamus</i>), and floating macrophytes (<i>Eichhornia crassipes/Pistia stratiotes</i>). Experimental results revealed that the multispecies planting system significantly enhanced TCS removal efficiency, achieving a sediment TCS removal rate over 78% after 50&#xa0;days of treatment. The introduction of floating macrophytes enhanced interspecific synergies through modifications in light allocation and optimizing resource competition dynamics. Microbial community analysis revealed the abundance of Proteobacteria exhibited a strong positive correlation (r = 0.999, <i>p</i> &lt; 0.001) with the sediment TCS partitioning coefficient (lgKd), with its metabolic functions playing a predominant role in TCS degradation. Our findings confirm that multi-species synergies effectively govern TCS environmental fate through plant-microbial coordination and ecological niche differentiation, providing theoretical and practical foundations for constructing efficient and stable aquatic remediation systems.</p>

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Investigation on the enrichment and partitioning of triclosan (TCS) in aquatic-sedimentary-multispecies plant systems

  • 期刊论文

  • 发表日期：

    2025年10月28日

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  • Li Hua,
  • Gaofan Dai,
  • Yu Chen,
  • Linfeng Li

摘要

Triclosan (TCS), a widely utilized antimicrobial agent, poses significant threats to ecosystem stability and public health due to its environmental persistence and bioaccumulative potential. This research systematically investigates the enrichment and distribution mechanisms of TCS in aquatic-sedimentary-plant integrated systems, while evaluating the synergistic the collaborative remediation performance and associated eco-physiological regulation mechanisms through strategic co-cultivation of submerged (Vallisneria natans), emergent (Acorus calamus), and floating macrophytes (Eichhornia crassipes/Pistia stratiotes). Experimental results revealed that the multispecies planting system significantly enhanced TCS removal efficiency, achieving a sediment TCS removal rate over 78% after 50 days of treatment. The introduction of floating macrophytes enhanced interspecific synergies through modifications in light allocation and optimizing resource competition dynamics. Microbial community analysis revealed the abundance of Proteobacteria exhibited a strong positive correlation (r = 0.999, p < 0.001) with the sediment TCS partitioning coefficient (lgKd), with its metabolic functions playing a predominant role in TCS degradation. Our findings confirm that multi-species synergies effectively govern TCS environmental fate through plant-microbial coordination and ecological niche differentiation, providing theoretical and practical foundations for constructing efficient and stable aquatic remediation systems.