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Impact of Montmorillonite and Calcite on Release and Adsorption of Cyanobacterial Fatty Acids at Ambient Temperature 总被引:1,自引:0,他引:1
Minerals might act as important sorbents of sedimentary organic matter and reduce biodegradation, which favors the formation of hydrocarbon source rocks in the earth's history. Since most organic matter is degraded during the sinking process, at ambient temperature, it is important to investigate the adsorption capacity of different minerals during this process, to assess the organic loss from primary productivity to sedimentary organic matter. In this study, montmorillonite and calcite have been selected to study the impact of different minerals on the release, adsorption, and deposition of cyanobacterial (Synechococcus elonpata) fatty acids (FAs) at ambient temperature. Gas chromatography (GC), gas chromatography-mass spectrometry (GC-MS) have been utilized to detect the variation in fatty acids. Primary results suggest that minerals have a different impact on dissolved organic matter. Montmorillonite can specifically enhance the release of fatty acids from cyanobacterial cells by lowering the pH values of the solution. The adsorption of the dissolved organic matter by montmorillonite will also be enhanced under a lower pH value. Conjunction of fatty acids with montmorillonite to form a complex will favor the sinking and preservation of these organics. Selective adsorption is observed among fatty acids with different carbon numbers. In contrast, calcite does not show any impact on the release and adsorption of organic matter even though it is reportedly capable of acting as a catalyst during the transformation of organic matter at high temperature. The primary data bridge a link between primary productivity and sedimentary organic matter, suggesting the relative importance of claystones in the formation of hydrocarbon source rocks in the earth's history. 相似文献
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政府间国际组织作为政治全球化中的一个重要作用者,体现出不同于经济维度的全球化联系。文章运用链锁网络模型计算中日两国政府间国际组织的两两连接度,分析中日两国的全球国际政治联系的图景与差异。研究发现:1)中日两国的政府间国际组织办公室数量接近,但日本的全球联系强于中国;2)在与中日两国联系较为紧密的国家中,日本与它们的联系普遍强于中国;3)中国与亚洲和非洲发展中国家的联系在中国的全球政治联系网络中占据相对重要的地位,而日本的全球政治联系主要发生在欧美发达国家之间。最后从战后国际政治秩序和地缘政治的角度对上述差异进行分析讨论,对中国未来参与联合国框架下的政府间国际事务及如何提高国际政治影响力提出了建议。 相似文献
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