| 郭文娟,李国亭,宋志鑫,王梦悦.化学通报,2026,89(1):80-88. |
| 导电材料强化胞外电子转移促进蓝铁石结晶的研究进展 |
| Advances in Vivianite Crystallization Enhanced by Conductive Materials through Facilitated Extracellular Electron Transfer |
| 投稿时间：2025-09-03 修订日期：2025-10-16 |
| DOI： |
| 中文关键词: 蓝铁石 磷回收 导电材料 胞外电子转移 城市污泥 |
| 英文关键词:Vivianite Phosphorus Recovery Conductive Materials Extracellular Electron Transfer Municipal Sludge |
| 基金项目:河南省重点研发专项项目(231111320200)资助 |
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| 中文摘要: |
| 由于磷矿资源的短缺,以蓝铁石(Vivianite, Fe3(PO4)2.8H2O)的形式从城市污泥系统中回收磷,因其简单易得、高含磷量和高经济价值的优势,成为目前备受关注的磷回收方法。蓝铁石是在还原环境中,由于异化铁还原微生物的作用,将Fe(Ⅲ)/ Fe3+还原为Fe2+与正磷酸盐(PO43-)结晶而成的。微生物的细胞外电子转移(Extracellular electron transfer,EET)是影响蓝铁石生成的关键作用机制。投加导电材料(Conductive Materials,CMs)被证实可以通过促进微生物的EET,解决电子传递受限和铁还原效率低的瓶颈,强化蓝铁石结晶。因此,本文在梳理EET机制的基础上,综述了多种碳基、铁基和铁碳复合CMs促进EET强化蓝铁石结晶的最新研究进展,进一步解析了CMs强化EET的作用机制,并探讨了未来可能的研究方向。 |
| 英文摘要: |
| Due to the shortage of phosphorus resources, phosphorus recovery from urban sewage/sludge systems in the form of vivianite (Fe3(PO4)2.8H2O) has attracted significant attention as a promising method owing to its simplicity, high phosphorus content, and economic value. Vivianite is formed under reducing conditions through the crystallization of ferrous iron (Fe2+) and orthophosphate(PO43-), resulting from the microbial dissimilatory iron reduction of Fe(III)/Fe3+ by iron-reducing microorganisms. Extracellular electron transfer (EET) is a key mechanism influencing vivianite formation. The addition of conductive materials (CMs) has been shown to enhance vivianite crystallization by facilitating microbial EET, thereby addressing limitations in electron transfer and improving the efficiency of iron reduction. Based on a systematic analysis of EET mechanisms, this review summarizes recent advances in the application of various carbon-based, iron-based, and iron-carbon composite CMs for enhancing EET to promote vivianite crystallization. Furthermore, the mechanisms through which CMs facilitate EET are elucidated, and potential future research directions are discussed. |
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