| 黄海透光层悬浮半导体矿物组成及其促进微生物胞外电子传递过程初探 |
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| 引用本文： | 刘佳,孙元,任桂平,鲁安怀,李艳,丁竑瑞.黄海透光层悬浮半导体矿物组成及其促进微生物胞外电子传递过程初探[J].岩石矿物学杂志,2020,39(1):96-104. |
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| 作者姓名： | 刘佳 孙元 任桂平 鲁安怀 李艳 丁竑瑞 |
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| 作者单位： | 造山带与地壳演化教育部重点实验室, 矿物环境功能北京市重点实验室, 北京大学 地球与空间科学学院, 北京 100871,造山带与地壳演化教育部重点实验室, 矿物环境功能北京市重点实验室, 北京大学 地球与空间科学学院, 北京 100871,造山带与地壳演化教育部重点实验室, 矿物环境功能北京市重点实验室, 北京大学 地球与空间科学学院, 北京 100871,造山带与地壳演化教育部重点实验室, 矿物环境功能北京市重点实验室, 北京大学 地球与空间科学学院, 北京 100871,造山带与地壳演化教育部重点实验室, 矿物环境功能北京市重点实验室, 北京大学 地球与空间科学学院, 北京 100871,造山带与地壳演化教育部重点实验室, 矿物环境功能北京市重点实验室, 北京大学 地球与空间科学学院, 北京 100871 |
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| 基金项目： | 国家自然科学基金重点项目（91851208）；国际合作重点项目（41820104003） |
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| 摘 要： | 在地球上最为活跃的海洋透光层体系中,矿物-微生物交互作用的形式十分丰富。系统采集了黄海近海透光层水体样品,测试分析发现其中分布大量悬浮半导体矿物及微生物群落。通过电感耦合等离子质谱仪(ICP-MS)、环境扫描电子显微镜(ESEM)及配有的EDX能谱仪,从宏观到微区对悬浮颗粒矿物的化学元素组成进行了测试分析,发现其主要矿物组成元素为Si、O、Na、K、Ca、Al等,且含有较高含量的Mn、Fe、Ti等金属元素;通过X射线衍射光谱(XRD)、拉曼光谱(Raman)测试从整体到局部分析悬浮颗粒矿物的物相组成,发现其主要组成矿物为石英、钠长石、方解石、云母和绿泥石等,还有锐钛矿、金红石、板钛矿、针铁矿等铁、钛金属氧化物半导体矿物。通过16S rRNA高通量测序分析海水中主要微生物群落为Proteobacteria、Actinobacteria、Bacteroidetes、Planctomycetes、Woeseia、Fluviicola等,并通过构建双室反应体系对海水微生物与悬浮矿物间氧化还原作用及胞外电子传递过程进行了表征,结果显示增加海水悬浮矿物作为电子受体后,体系开路电压由330. 80 mV提升至426. 59 mV,提升比率达130%,最大输出功率由8. 376 9 mW/m^2提升至12. 096 8 mW/m^2,为原体系的1. 44倍。实验研究表明,海水透光层悬浮矿物能有效参与并促进微生物胞外电子传递过程,为后续深入研究基于电子能量传递利用的半导体矿物-微生物协同作用以及元素循环调控机制奠定初步基础。
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| 关 键 词： | 海洋透光层 半导体矿物 电化学 微生物 胞外电子传递 |
| 收稿时间： | 2019/8/26 0:00:00 |
| 修稿时间： | 2019/12/10 0:00:00 |
A preliminary study of the composition of suspended semiconductive minerals in the euphotic zone of the Yellow Sea and the process of promoting extracellular electron transfer of microorganisms |
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| LIU Ji,SUN Yuan,REN Gui-ping,LU An-huai,LI Yan and DING Hong-rui.A preliminary study of the composition of suspended semiconductive minerals in the euphotic zone of the Yellow Sea and the process of promoting extracellular electron transfer of microorganisms[J].Acta Petrologica Et Mineralogica,2020,39(1):96-104. |
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| Authors: | LIU Ji SUN Yuan REN Gui-ping LU An-huai LI Yan and DING Hong-rui |
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| Institution: | Key Laboratory of Orogenic Belts and Crustal Evolution, Beijing Key Laboratory of Mineral Environmental Function, School of Earth and Space Sciences, Peking University, Beijing 100871, China,Key Laboratory of Orogenic Belts and Crustal Evolution, Beijing Key Laboratory of Mineral Environmental Function, School of Earth and Space Sciences, Peking University, Beijing 100871, China,Key Laboratory of Orogenic Belts and Crustal Evolution, Beijing Key Laboratory of Mineral Environmental Function, School of Earth and Space Sciences, Peking University, Beijing 100871, China,Key Laboratory of Orogenic Belts and Crustal Evolution, Beijing Key Laboratory of Mineral Environmental Function, School of Earth and Space Sciences, Peking University, Beijing 100871, China,Key Laboratory of Orogenic Belts and Crustal Evolution, Beijing Key Laboratory of Mineral Environmental Function, School of Earth and Space Sciences, Peking University, Beijing 100871, China and Key Laboratory of Orogenic Belts and Crustal Evolution, Beijing Key Laboratory of Mineral Environmental Function, School of Earth and Space Sciences, Peking University, Beijing 100871, China |
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| Abstract: | Based on the most active marine system on the earth, the authors studied the interaction between minerals and microorganisms in this paper. In this study, a large number of suspended particles and microbial communities were found from water samples in euphotic zone of the Yellow Sea. ICP-MS, ESEM and the equipped EDX tested the element composition of suspended particle macroscopically and microscopically. The main elements are Si, O, Na, K, Ca and Al, as well as high content of Mn, Fe and Ti. X-ray diffraction spectroscopy (XRD) and Raman spectroscopy shows that the main mineral components of suspended particles are quartz, albite, calcite, mica and chlorite etc. Moreover, semiconductor minerals of iron and titanium metal oxides such as anatase, rutile, brookite and goethite were also found in suspended minerals. The composition characteristics of the microbial communities were preliminarily analyzed through 16S rRNA, and the main communities are Proteobacteria, Actinobacteria, Bacteroidetes, Planctomycetes, Woeseia, Fluviicolas. A dual-chamber reactor was used to study the mechanism of redox reaction and electron transfer process between microorganisms and suspended minerals. With the increase of suspended minerals as the electron acceptor, the open circuit voltages of the system were increased from 330.80 mV to 426.59 mV, and their maximum output powers were increased from 8.376 9 mW/m2 to 12.096 8 mW/m2. Experiments indicate that suspended minerals in the euphotic zone can effectively participate in and promote the process of extracellular electron transfer, which will make a foundation for further research on electron energy transfer based on the interactions of semiconductive minerals and microorganisms, as well as the regulation mechanism of elements cycling. |
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| Keywords: | marine euphotic zone semiconductive mineral electrochemistry microorganisms extracellular electron transfer |
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