Advances in Earth Science ›› 2016, Vol. 31 ›› Issue (11): 1151-1158. doi: 10.11867/j.issn.1001-8166.2016.11.1151

• Orginal Article • Previous Articles     Next Articles

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

Bin Zhao 1, 2( ), Peng Yao 1, *( ), Zhigang Yu 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: Peng Yao;
  • About author:

    First author:Zhao Bin(1988-),male,Qingdao City,Shandong Province,Ph.D. student. Research areas include oceanography and

  • 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)

Bin Zhao, Peng Yao, Zhigang Yu. The Effect of Organic Carbon-Iron Oxide Association on the Preservation of Sedimentary Organic Carbon in Marine Environments[J]. Advances in Earth Science, 2016, 31(11): 1151-1158.

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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