铁(II)供应率和细胞外聚合物质对铁酸盐生物转化的调节作用

IF 4.5 1区 地球科学 Q1 GEOCHEMISTRY & GEOPHYSICS
Anxu Sheng , Yurong Deng , Yuefei Ding , Linxin Cheng , Yuyan Liu , Xiaoxu Li , Yuji Arai , Juan Liu
{"title":"铁(II)供应率和细胞外聚合物质对铁酸盐生物转化的调节作用","authors":"Anxu Sheng ,&nbsp;Yurong Deng ,&nbsp;Yuefei Ding ,&nbsp;Linxin Cheng ,&nbsp;Yuyan Liu ,&nbsp;Xiaoxu Li ,&nbsp;Yuji Arai ,&nbsp;Juan Liu","doi":"10.1016/j.gca.2024.08.029","DOIUrl":null,"url":null,"abstract":"<div><div>Biotransformation of ferrihydrite (Fh) by dissimilatory iron-reducing bacteria (DIRB) into various secondary minerals assemblages widely occurs in anaerobic environments. While respiration-driven supply rates of Fe(II) have been proposed as a primary factor controlling kinetics and mineral products of this process, the specific mechanism by which DIRB respiration rates regulate Fh biotransformation remains elusive. Here, to minimize the complex effects of microbial cells, we conducted Fh transformation using 1 mM biogenic Fe(II) (BioFe(II)), added at different rates to mimic diverse respiration-driven supply rates of Fe(II) by DIRB. For comparison, transformation experiments with FeSO<sub>4</sub> alone and FeSO<sub>4</sub> plus citrate (CitFe(II)) added at the corresponding supply rates were performed to decouple the specific effects of Fe(II) addition rates and extracellular polymeric substances (EPS) associated with BioFe(II). Decreasing FeSO<sub>4</sub> supply rates favored the transformation of Fh to lepidocrocite (Lp) over to Gt and the subsequent transformation of Lp to magnetite (Mt), altering the transformation pathway from Fh → Lp/Gt → Gt to Fh → Lp/Gt → Mt/Gt. These results underscore the significant effect of aqueous Fe(II) supply rates on the competition of olation and oxolation of labile Fe(III) intermediates into different secondary minerals. In the experiments with BioFe(II) and CitFe(II), although EPS or citrate slightly increased Fe(II) adsorption and Fe(III)<sub>labile</sub> generation, the increase in sorbed Fe(II) was minimal compared to the variations in aqueous Fe(II) concentrations caused by the different Fe(II) supply rates. At the same Fe(II) supply rates, EPS or citrate notably inhibited the transformation of Fh to Gt and the further conversion of Lp, altering the pathway from Fh → Mt/Gt/Lp to primarily Fh → Lp. These effects became more pronounced with the decrease of BioFe(II) and CitFe(II) supply rates. Our findings provide new insights into how DIRB respiration rates control kinetics, pathways, and mineral products of Fh transformation, which is crucial for elucidating the relevant biogeochemical cycling of nutrients and (im)mobilization of contaminants.</div></div>","PeriodicalId":327,"journal":{"name":"Geochimica et Cosmochimica Acta","volume":"385 ","pages":"Pages 87-99"},"PeriodicalIF":4.5000,"publicationDate":"2024-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Regulation of ferrihydrite biotransformation by Fe(II) supply rates and extracellular polymeric substances\",\"authors\":\"Anxu Sheng ,&nbsp;Yurong Deng ,&nbsp;Yuefei Ding ,&nbsp;Linxin Cheng ,&nbsp;Yuyan Liu ,&nbsp;Xiaoxu Li ,&nbsp;Yuji Arai ,&nbsp;Juan Liu\",\"doi\":\"10.1016/j.gca.2024.08.029\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>Biotransformation of ferrihydrite (Fh) by dissimilatory iron-reducing bacteria (DIRB) into various secondary minerals assemblages widely occurs in anaerobic environments. While respiration-driven supply rates of Fe(II) have been proposed as a primary factor controlling kinetics and mineral products of this process, the specific mechanism by which DIRB respiration rates regulate Fh biotransformation remains elusive. Here, to minimize the complex effects of microbial cells, we conducted Fh transformation using 1 mM biogenic Fe(II) (BioFe(II)), added at different rates to mimic diverse respiration-driven supply rates of Fe(II) by DIRB. For comparison, transformation experiments with FeSO<sub>4</sub> alone and FeSO<sub>4</sub> plus citrate (CitFe(II)) added at the corresponding supply rates were performed to decouple the specific effects of Fe(II) addition rates and extracellular polymeric substances (EPS) associated with BioFe(II). Decreasing FeSO<sub>4</sub> supply rates favored the transformation of Fh to lepidocrocite (Lp) over to Gt and the subsequent transformation of Lp to magnetite (Mt), altering the transformation pathway from Fh → Lp/Gt → Gt to Fh → Lp/Gt → Mt/Gt. These results underscore the significant effect of aqueous Fe(II) supply rates on the competition of olation and oxolation of labile Fe(III) intermediates into different secondary minerals. In the experiments with BioFe(II) and CitFe(II), although EPS or citrate slightly increased Fe(II) adsorption and Fe(III)<sub>labile</sub> generation, the increase in sorbed Fe(II) was minimal compared to the variations in aqueous Fe(II) concentrations caused by the different Fe(II) supply rates. At the same Fe(II) supply rates, EPS or citrate notably inhibited the transformation of Fh to Gt and the further conversion of Lp, altering the pathway from Fh → Mt/Gt/Lp to primarily Fh → Lp. These effects became more pronounced with the decrease of BioFe(II) and CitFe(II) supply rates. Our findings provide new insights into how DIRB respiration rates control kinetics, pathways, and mineral products of Fh transformation, which is crucial for elucidating the relevant biogeochemical cycling of nutrients and (im)mobilization of contaminants.</div></div>\",\"PeriodicalId\":327,\"journal\":{\"name\":\"Geochimica et Cosmochimica Acta\",\"volume\":\"385 \",\"pages\":\"Pages 87-99\"},\"PeriodicalIF\":4.5000,\"publicationDate\":\"2024-09-04\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Geochimica et Cosmochimica Acta\",\"FirstCategoryId\":\"89\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0016703724004356\",\"RegionNum\":1,\"RegionCategory\":\"地球科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"GEOCHEMISTRY & GEOPHYSICS\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Geochimica et Cosmochimica Acta","FirstCategoryId":"89","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0016703724004356","RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"GEOCHEMISTRY & GEOPHYSICS","Score":null,"Total":0}
引用次数: 0

摘要

在厌氧环境中,溶铁还原菌(DIRB)将铁酸盐(Fh)生物转化为各种次生矿物集合体的现象广泛存在。虽然呼吸驱动的铁(II)供应率被认为是控制这一过程的动力学和矿物产物的主要因素,但 DIRB 呼吸率调节 Fh 生物转化的具体机制仍然难以捉摸。在这里,为了尽量减少微生物细胞的复杂影响,我们使用 1 mM 生物源铁(II)(BioFe(II))进行了 Fh 转化,以不同的速率加入以模拟 DIRB 不同的呼吸驱动的铁(II)供应速率。为了进行比较,还进行了单独添加 FeSO4 和以相应供应率添加 FeSO4 加柠檬酸盐(CitFe(II))的转化实验,以消除 Fe(II) 添加率和与 BioFe(II) 相关的胞外聚合物质(EPS)的特定影响。降低 FeSO4 的供应率有利于 Fh 向鳞片石(Lp)的转化,而不是向 Gt 的转化,以及 Lp 向磁铁矿(Mt)的转化,从而改变了从 Fh → Lp/Gt → Gt 到 Fh → Lp/Gt → Mt/Gt 的转化途径。这些结果表明,水溶液中铁(II)的供应率对可溶性铁(III)中间产物在不同次生矿物中的氧化和氧化竞争有重要影响。在使用 BioFe(II) 和 CitFe(II) 的实验中,虽然 EPS 或柠檬酸盐略微增加了铁(II)的吸附和铁(III)的生成,但与不同的铁(II)供应率导致的水体铁(II)浓度变化相比,吸附铁(II)的增加是微不足道的。在相同的 Fe(II)供应率下,EPS 或柠檬酸盐明显抑制了 Fh 向 Gt 的转化和 Lp 的进一步转化,改变了 Fh → Mt/Gt/Lp 到主要是 Fh → Lp 的途径。随着生物铁(II)和柠檬铁(II)供应率的降低,这些影响变得更加明显。我们的研究结果为了解 DIRB 呼吸速率如何控制 Fh 转化的动力学、途径和矿物产物提供了新的视角,这对于阐明相关的营养物质生物地球化学循环和污染物的(非)移动至关重要。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Regulation of ferrihydrite biotransformation by Fe(II) supply rates and extracellular polymeric substances
Biotransformation of ferrihydrite (Fh) by dissimilatory iron-reducing bacteria (DIRB) into various secondary minerals assemblages widely occurs in anaerobic environments. While respiration-driven supply rates of Fe(II) have been proposed as a primary factor controlling kinetics and mineral products of this process, the specific mechanism by which DIRB respiration rates regulate Fh biotransformation remains elusive. Here, to minimize the complex effects of microbial cells, we conducted Fh transformation using 1 mM biogenic Fe(II) (BioFe(II)), added at different rates to mimic diverse respiration-driven supply rates of Fe(II) by DIRB. For comparison, transformation experiments with FeSO4 alone and FeSO4 plus citrate (CitFe(II)) added at the corresponding supply rates were performed to decouple the specific effects of Fe(II) addition rates and extracellular polymeric substances (EPS) associated with BioFe(II). Decreasing FeSO4 supply rates favored the transformation of Fh to lepidocrocite (Lp) over to Gt and the subsequent transformation of Lp to magnetite (Mt), altering the transformation pathway from Fh → Lp/Gt → Gt to Fh → Lp/Gt → Mt/Gt. These results underscore the significant effect of aqueous Fe(II) supply rates on the competition of olation and oxolation of labile Fe(III) intermediates into different secondary minerals. In the experiments with BioFe(II) and CitFe(II), although EPS or citrate slightly increased Fe(II) adsorption and Fe(III)labile generation, the increase in sorbed Fe(II) was minimal compared to the variations in aqueous Fe(II) concentrations caused by the different Fe(II) supply rates. At the same Fe(II) supply rates, EPS or citrate notably inhibited the transformation of Fh to Gt and the further conversion of Lp, altering the pathway from Fh → Mt/Gt/Lp to primarily Fh → Lp. These effects became more pronounced with the decrease of BioFe(II) and CitFe(II) supply rates. Our findings provide new insights into how DIRB respiration rates control kinetics, pathways, and mineral products of Fh transformation, which is crucial for elucidating the relevant biogeochemical cycling of nutrients and (im)mobilization of contaminants.
求助全文
通过发布文献求助,成功后即可免费获取论文全文。 去求助
来源期刊
Geochimica et Cosmochimica Acta
Geochimica et Cosmochimica Acta 地学-地球化学与地球物理
CiteScore
9.60
自引率
14.00%
发文量
437
审稿时长
6 months
期刊介绍: Geochimica et Cosmochimica Acta publishes research papers in a wide range of subjects in terrestrial geochemistry, meteoritics, and planetary geochemistry. The scope of the journal includes: 1). Physical chemistry of gases, aqueous solutions, glasses, and crystalline solids 2). Igneous and metamorphic petrology 3). Chemical processes in the atmosphere, hydrosphere, biosphere, and lithosphere of the Earth 4). Organic geochemistry 5). Isotope geochemistry 6). Meteoritics and meteorite impacts 7). Lunar science; and 8). Planetary geochemistry.
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
copy
已复制链接
快去分享给好友吧!
我知道了
右上角分享
点击右上角分享
0
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术官方微信