地球科学进展 ›› 2016, Vol. 31 ›› Issue (11): 1151 -1158. doi: 10.11867/j.issn.1001-8166.2016.11.1151

综述与评述 上一篇    下一篇

有机碳—氧化铁结合对海洋环境中沉积有机碳保存的影响
赵彬 1, 2, 姚鹏 1*, *, 于志刚 1, 3   
  1. 1.中国海洋大学海洋化学理论与工程技术教育部重点实验室, 山东 青岛 266100;
    2.中国海洋大学化学化工学院, 山东 青岛 266100;
    3.青岛海洋科学与技术国家实验室海洋生态与环境科学功能实验室, 山东 青岛 266237
  • 收稿日期:2016-08-10 修回日期:2016-10-20 出版日期:2016-11-20
  • 通讯作者: 姚鹏(1977-),男,山东菏泽人,教授,主要从事海洋有机生物地球化学研究.E-mail:yaopeng@ouc.edu.cn
  • 基金资助:
    国家自然科学基金重点国际(地区)合作研究项目“长江口及邻近海域沉积有机碳的保存机制研究”(编号:41620104001); 国家自然科学基金面上项目“长江口—东海内陆架沉积有机碳的再矿化作用研究”(编号:41676063)资助

The Effect of Organic Carbon-Iron Oxide Association on the Preservation of Sedimentary Organic Carbon in Marine Environments

Zhao Bin 1, 2, Yao Peng 1, *, Yu Zhigang 1, 3   

  1. 1.Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education,Qingdao 266100,China;
    2.College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, China;
    3.Laboratory of Marine Ecology and Environmental Science, Qingdao National Laboratory forMarine Science and Technology, Qingdao 266237, China
  • Received:2016-08-10 Revised:2016-10-20 Online:2016-11-20 Published:2016-11-20
  • Contact: Yao Peng(1979-),male,Heze City,Shandong Province, Professor. Research areas include oceanography and biogeochemistry.E-mail:yaopeng@ouc.edu.cn
  • About author:Zhao Bin(1988-),male,Qingdao City,Shandong Province,Ph.D. student. Research areas include oceanography and biogeochemistry.E-mail:zhaobin1988@hotmail.com
  • Supported by:
    Project supported by the Major International Joint Research Project of National Science Foundation of China “ Preservation mechanisms of sedimentary organic carbon in the Changjiang Estuary and adjacent shelf ”(No.41620104001); the National Natural Science Foundation of China“ Remineralization of sedimentary organic carbon in the Changjiang Estuary-East China Sea inner shelf ”(No.41676063)
有机碳在海洋环境中的长期保存机制一直是海洋碳循环研究的重点,也是研究气候变化与全球碳循环之间作用和反馈的关键。据估算,表层海洋沉积物中约20%的有机碳是通过与氧化铁的结合而保存下来的,因此与氧化铁结合是有机碳长期保存的关键因素之一。研究表明,有机碳—氧化铁复合物的形成主要通过吸附和共沉淀这2种机制,共沉淀反应是有机碳与氧化铁在海洋环境中结合的主导机制。不同来源的有机物在发生与铁氧化物的共沉淀或吸附作用时是有选择性的,在大部分海洋环境中铁氧化物优先与海洋有机碳结合,但在河口三角洲区域,铁氧化物优先与陆源有机碳结合。大量的陆源输入,较高的初级生产和频繁的再悬浮活动使河口边缘海特别适于开展有机碳—氧化铁结合的相关研究,这也是今后研究的重点方向。
Understanding the mechanisms responsible for long-term storage of organic carbon (OC) in marine environment is important for studying the marine carbon cycling and predicting how the global carbon cycle will respond to climate change. It is estimated that more than 20% of the OC in marine sediments is associated with iron oxides and thus these complexes are one of the most important factors in the long-term storage of OC. The OC-iron oxide (OC-Fe) association can be formed through either adsorption or co-precipitation, but the dominant mechanism of OC-Fe association in marine environments is co-precipitation. The combination of OC from different sources with iron oxides is selective. Iron oxides preferentially combine with marine OC in most marine environments, but in estuarine delta regions they prefer terrestrial OC. Due to large inputs of terrestrial materials, high primary production and frequent re-suspension, estuarine and marginal seas are suitable sites for OC-Fe association studies, which should be emphasized in the future.

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