海洋粘土矿物与颗石藻Emiliania huxleyi共培养的实验研究

发布时间：2019-01-14 15:04

【摘要】：颗石藻是海洋中广泛分布的超微型浮游藻,经生物矿化作用形成的碳酸钙质颗石,在古海洋学研究中具有重要意义。海洋粘土矿物与有机质的有机-无机相互作用在全球碳循环中扮演着重要角色。本文选取广泛分布于海洋的赫氏颗石藻Emiliania huxleyi与海洋粘土矿物中具有代表性的伊利石和蒙脱石共培养。通过对颗石藻生长曲线和Sr/Ca、Mg/Ca元素比值、颗石藻与粘土矿物样品的紫外可见光吸收光谱、红外吸收光谱和矿物物相等分析,研究海洋粘土矿物与颗石藻的相互作用规律。通过研究表明伊利石对颗石藻的影响较小,蒙脱石因对营养元素的吸附和颗石藻的絮凝作用对颗石藻的生长和Sr/Ca、Mg/Ca元素比值影响较大。颗石藻代谢分泌的生物分子未能通过层间插层作用进入伊利石层间,颗石藻分泌的生物分子可通过插层作用进入并储存于蒙脱石层间,海洋粘土矿物中的蒙脱石与海洋微生物的相互作用值得地球微生物家关注,可能有助于对古海洋环境的认识。
[Abstract]:Caryophyta is a widely distributed ultramicro plankton in the ocean. It is of great significance in paleoceanographic research for the formation of calcium carbonate granulite by biomineralization. The organic-inorganic interaction between marine clay minerals and organic matter plays an important role in the global carbon cycle. In this paper, Emiliania huxleyi, which is widely distributed in the sea, is cocultured with Illite and montmorillonite, which are representative of marine clay minerals. By analyzing the growth curve and the ratio of Sr/Ca,Mg/Ca elements, the UV-Vis absorption spectra, the infrared absorption spectra and the mineral contents of the samples were analyzed. The interaction between marine clay minerals and Caryophyta was studied. The results showed that Illite had little effect on the growth and the ratio of Sr/Ca,Mg/Ca elements to montmorillonite because of its adsorption of nutrient elements and flocculation. The biomolecules secreted by the metabolism of Chlorella failed to enter the Illite layer by intercalation, and the biomolecules secreted by the alga could enter and store in the montmorillonite layer by intercalation. The interaction between montmorillonite and marine microbes in marine clay minerals deserves the attention of microbiologists of the earth and may be helpful to the understanding of paleo-marine environment.
【作者单位】：西南科技大学环境与资源学院固体废物处理与资源化教育部重点实验室;低成本废水处理技术四川省国际科技合作基地西南科技大学;
【基金】：国家自然科学基金资助项目(41472310,41672039) 西南科技大学研究生创新基金(16ycx041)~~
【分类号】：Q949.2;P736.3

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