硅藻生物硅中铝的赋存及其生物地球化学效应  

Occurrence of Aluminum in Diatomaceous Biological Silica and Its Effectson Al-biogeochemical Cycle

作　　者：刘冬[1,2] 田倩 袁鹏[1,2] 李梦圆 LIU Dong;TIAN Qian;YUAN Peng;LI Meng-yuan(CAS Key Laboratory of Mineralogy and Metallogeny/Guangdong Provincial Key Laboratory of Mineral Physics and Materials,Guangzhou Institute of Geochemistry,Chinese Academy of Sciences,Guangzhou 510640,China;CAS Center for Excellence in Deep Earth Science,Chinese Academy of Sciences,Guangzhou 510640,China;University of Chinese Academy of Sciences,,Beijing 100049,China)

机构地区：[1]中国科学院广州地球化学研究所中国科学院矿物学与成矿学重点实验室/广东省矿物物理与材料研究开发重点实验室,广州510640 [2]中国科学院深地科学卓越创新中心,广州510640 [3]中国科学院大学,北京100049

出　　处：《矿物岩石地球化学通报》2022年第2期235-244,共10页Bulletin of Mineralogy, Petrology and Geochemistry

基　　金：国家自然科学基金资助项目(41202024,41772041,42172047);国家高层次人才特殊支持计划项目;近海海洋环境科学国家重点实验室(厦门大学)访问学者基金资助项目(MELRS2006);广东省科技计划项目(2020B1212060055)。

摘　　要：硅藻是铝生物地球化学循环的重要驱动者。淡水和海洋硅藻均可对铝进行捕获,并将其作为构建硅藻生物硅的骨架元素。由此,铝在硅藻生物硅“携带”下迁移和循环,并通过降低硅藻生物硅的溶解度对其固碳效应等产生重要影响。本文主要从硅藻和铝的生物-元素界面作用机制、铝在硅藻生物硅中的赋存特征以及铝对硅藻生物硅的“生物泵”效率的影响及机制三方面,介绍铝的生物地球化学循环受硅藻驱动的机制以及铝在硅藻生物硅中赋存所引起的地球化学效应,最后提出相关研究面临的挑战和亟待解决的一些问题。The biogeochemical cycle of aluminum(Al)is driven by diatoms.Diatoms take up Al to build their silica frustules(biological silica,BSi)in continental fresh water and seawater.The migration and cycling of Al in BSi will reduce the solubility of BSi,thereby affecting the global carbon sequestration of diatoms.This article introduces the biogeochemical mechanism of diatoms driving the cycle of Al and the geochemical effect of Al presenting in BSi from three perspectives:the reaction and mechanism on the biological-element interface between diatoms and Al,the occurrence characteristics of Al in BSi,and the influence and mechanism of Al on the efficiency of the“biological carbon pump”of diatoms.This article also discusses issues and suggestions in the field of Al biogeochemical cycles.

关 键 词：硅藻 铝生物地球化学循环 硅藻生物硅 生物泵 固碳 

分 类 号：P59[天文地球—地球化学]