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Although long-term studies on enhanced biological phosphorus removal systems and biofilm-based phosphorus enrichment processes have established the crucial involvement of extracellular polymeric substances (EPS), the mechanisms by which EPS participate in phosphorus uptake and release remain debated. Key points of contention include whether EPS exhibit independent phosphorus sequestration and release capabilities distinct from cellular metabolic activities, and whether biochemical reactions or physico-chemical precipitation processes dominate within EPS. This review summarizes major findings from previous research on phosphorus uptake and release mechanisms mediated by EPS. Based on the transport and transformation behavior of phosphorus and its compounds in environmental systems, as well as critical phenomena recently observed in sequencing batch biofilm reactors for phosphorus removal and enrichment, a new hypothesis is proposed: under redox-regulated conditions, the dominant mechanism of EPS in biological phosphorus cycling involves physico-chemical processes of binding/fixation and dissociation/mobilization, while phosphorus migration between EPS and the aqueous phase is primarily diffusion-driven. This hypothesis offers an integrated framework for explaining phosphorus translocation and transformation between EPS and the solution, helps to reconcile existing controversies and unanswered questions in the literature, and provides a novel theoretical basis for understanding the role of EPS in biological phosphorus removal processes.

, authors=Zhen BI1, 2, Ge SONG1, Yong HUANG1, 2, *, authorsList=Zhen BI, Ge SONG, Yong HUANG, authorCompany=null, correspAuthors=Yong HUANG, authorNote=null, correspAuthorsNote=null, copyrightStatement=null, copyrightOwner=null, extLink=null, articleAbsUrl=null, sourceXml=null, magXml=null, pdfUrl=null, pdf=null, pdfFileSize=null, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=null, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=null, mapNumber=null, fund=null), CN=ArticleExt(id=1314918489190658406, articleId=1314918487231918436, tenantId=1146029695717560320, journalId=1234093305789726721, language=CN, title=胞外聚合物在吸磷/释磷过程中的作用机制, columnId=1234106386565624579, journalTitle=中国环境科学, columnName=水污染与控制, runingTitle=null, highlight=null, articleAbstract=

尽管生物除磷系统和生物膜磷富集系统的长期研究结果已证实了胞外聚合物(EPS)的重要作用,然而对其在吸磷/释磷过程中的作用机制,尤其是围绕EPS是否具有独立于细胞吸磷/释磷的能力,以及EPS中是发生生物化学反应还是物理化学沉淀作用这两方面尚存在争议.本文综述了现有EPS吸磷/释磷作用机制相关研究的主要成果,并基于磷及其化合物在环境中的迁移转化特性,结合近年来在序批式生物膜去除富集磷系统中所观察到的重要现象,对EPS吸磷/释磷作用机制提出了新的假说:即氧化还原条件调控下,磷的结合/固定与离解/迁移的物理化学过程,是EPS在生物吸磷/释磷过程中的主导性作用机制,而磷在EPS与溶液间的迁移过程主要受扩散的支配.利用新假说,可以清晰地描述磷在EPS与溶液间的迁移转化过程,澄清文献中的相关争议和质疑,为阐释生物除磷过程中EPS的作用提供了新的理论视角.

, authors=毕贞1, 2, 宋歌1, 黄勇1, 2, *, authorsList=毕贞, 宋歌, 黄勇, authorCompany=null, correspAuthors=黄勇, authorNote=

毕贞(1986-),女,江苏苏州人,副教授,博士,研究方向为污水处理与资源化利用技术.发表论文30余篇..

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毕贞(1986-),女,江苏苏州人,副教授,博士,研究方向为污水处理与资源化利用技术.发表论文30余篇..

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毕贞(1986-),女,江苏苏州人,副教授,博士,研究方向为污水处理与资源化利用技术.发表论文30余篇..

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胞外聚合物在吸磷/释磷过程中的作用机制
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毕贞 1, 2 , 宋歌 1 , 黄勇 1, 2, *
中国环境科学 | 水污染与控制 2025,45(12): 6602-6616
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中国环境科学 |水污染与控制 2025 , 45 (12) : 6602 -6616
胞外聚合物在吸磷/释磷过程中的作用机制
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毕贞1, 2 , 宋歌1, 黄勇1, 2, *
作者信息
  • 1.苏州科技大学环境科学与工程学院,江苏 苏州 215009
  • 2.城市生活污水资源化利用技术国家地方联合工程实验室,江苏 苏州 215009
通讯作者:
* 责任作者,教授,
作者简介:

毕贞(1986-),女,江苏苏州人,副教授,博士,研究方向为污水处理与资源化利用技术.发表论文30余篇..

The role of extracellular polymeric substances in phosphorus adsorption processes
Zhen BI1, 2 , Ge SONG1, Yong HUANG1, 2, *
Affiliations
  • 1.School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou 215009, China
  • 2.National and Local Joint Engineering Laboratory of Municipal Sewage Resource Utilization Technology, Suzhou 215009, China
出版时间: 2025-12-20
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尽管生物除磷系统和生物膜磷富集系统的长期研究结果已证实了胞外聚合物(EPS)的重要作用,然而对其在吸磷/释磷过程中的作用机制,尤其是围绕EPS是否具有独立于细胞吸磷/释磷的能力,以及EPS中是发生生物化学反应还是物理化学沉淀作用这两方面尚存在争议.本文综述了现有EPS吸磷/释磷作用机制相关研究的主要成果,并基于磷及其化合物在环境中的迁移转化特性,结合近年来在序批式生物膜去除富集磷系统中所观察到的重要现象,对EPS吸磷/释磷作用机制提出了新的假说:即氧化还原条件调控下,磷的结合/固定与离解/迁移的物理化学过程,是EPS在生物吸磷/释磷过程中的主导性作用机制,而磷在EPS与溶液间的迁移过程主要受扩散的支配.利用新假说,可以清晰地描述磷在EPS与溶液间的迁移转化过程,澄清文献中的相关争议和质疑,为阐释生物除磷过程中EPS的作用提供了新的理论视角.

胞外聚合物  /  聚磷菌  /  磷迁移与转化  /  生物除磷  /  生物膜

Although long-term studies on enhanced biological phosphorus removal systems and biofilm-based phosphorus enrichment processes have established the crucial involvement of extracellular polymeric substances (EPS), the mechanisms by which EPS participate in phosphorus uptake and release remain debated. Key points of contention include whether EPS exhibit independent phosphorus sequestration and release capabilities distinct from cellular metabolic activities, and whether biochemical reactions or physico-chemical precipitation processes dominate within EPS. This review summarizes major findings from previous research on phosphorus uptake and release mechanisms mediated by EPS. Based on the transport and transformation behavior of phosphorus and its compounds in environmental systems, as well as critical phenomena recently observed in sequencing batch biofilm reactors for phosphorus removal and enrichment, a new hypothesis is proposed: under redox-regulated conditions, the dominant mechanism of EPS in biological phosphorus cycling involves physico-chemical processes of binding/fixation and dissociation/mobilization, while phosphorus migration between EPS and the aqueous phase is primarily diffusion-driven. This hypothesis offers an integrated framework for explaining phosphorus translocation and transformation between EPS and the solution, helps to reconcile existing controversies and unanswered questions in the literature, and provides a novel theoretical basis for understanding the role of EPS in biological phosphorus removal processes.

extracellular polymeric substances (EPS)  /  polyphosphate-accumulating organisms (PAOs)  /  phosphorus migration and transformation  /  biological phosphorus removal  /  biofilm
毕贞, 宋歌, 黄勇. 胞外聚合物在吸磷/释磷过程中的作用机制. 中国环境科学, 2025 , 45 (12) : 6602 -6616 .
Zhen BI, Ge SONG, Yong HUANG. The role of extracellular polymeric substances in phosphorus adsorption processes[J]. China Environmental Science, 2025 , 45 (12) : 6602 -6616 .
  • 国家自然科学基金资助项目(51938010)
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  • 接收时间:2025-05-20
  • 首发时间:2026-10-08
  • 出版时间:2025-12-20
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  • 收稿日期:2025-05-20
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国家自然科学基金资助项目(51938010)
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    1.苏州科技大学环境科学与工程学院,江苏 苏州 215009
    2.城市生活污水资源化利用技术国家地方联合工程实验室,江苏 苏州 215009

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鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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