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In situ, high-resolution DGT measurements of dissolved sulfide, iron and phosphorus in sediments of the East China Sea: Insights into phosphorus mobilization and microbial iron reduction.
Mar Pollut Bull. 2017 Nov 15; 124(1):400-410.MP

Abstract

Dissolved sulfide, iron (Fe), and phosphorus (P) concentrations in sediments of the East China Sea were simultaneously measured in situ by diffusive gradients in thin films (DGT) technique. The results, by combination with solid-phase Fe speciation, were used to characterize the interplays of Fe, S and P. Diverse distributions of dissolved sulfide among the sites are attributable to highly dynamic diagenetic regimes and varying availability of labile organic carbon (OC). The DGT technique provided high-resolution evidence for coexistence of microbial iron reduction (MIR) and sulfate reduction in localized zones, and for Fe-coupled P mobilization. Measured Fe2+/P ratios suggest that Fe2+ reoxidatiion at the oxic zones can serve as an efficient scavenger of P. Empirical estimation indicates that MIR plays an important role in anaerobic OC mineralization in the sediments, which is a combined result of low availability of labile OC, high reactive Fe content, and unsteady diagenetic regimes.

Authors+Show Affiliations

Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, China.Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, China. Electronic address: zhumaoxu@ouc.edu.cn.Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, China.Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, China.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

28778383

Citation

Ma, Wei-Wei, et al. "In Situ, High-resolution DGT Measurements of Dissolved Sulfide, Iron and Phosphorus in Sediments of the East China Sea: Insights Into Phosphorus Mobilization and Microbial Iron Reduction." Marine Pollution Bulletin, vol. 124, no. 1, 2017, pp. 400-410.
Ma WW, Zhu MX, Yang GP, et al. In situ, high-resolution DGT measurements of dissolved sulfide, iron and phosphorus in sediments of the East China Sea: Insights into phosphorus mobilization and microbial iron reduction. Mar Pollut Bull. 2017;124(1):400-410.
Ma, W. W., Zhu, M. X., Yang, G. P., & Li, T. (2017). In situ, high-resolution DGT measurements of dissolved sulfide, iron and phosphorus in sediments of the East China Sea: Insights into phosphorus mobilization and microbial iron reduction. Marine Pollution Bulletin, 124(1), 400-410. https://doi.org/10.1016/j.marpolbul.2017.07.056
Ma WW, et al. In Situ, High-resolution DGT Measurements of Dissolved Sulfide, Iron and Phosphorus in Sediments of the East China Sea: Insights Into Phosphorus Mobilization and Microbial Iron Reduction. Mar Pollut Bull. 2017 Nov 15;124(1):400-410. PubMed PMID: 28778383.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - In situ, high-resolution DGT measurements of dissolved sulfide, iron and phosphorus in sediments of the East China Sea: Insights into phosphorus mobilization and microbial iron reduction. AU - Ma,Wei-Wei, AU - Zhu,Mao-Xu, AU - Yang,Gui-Peng, AU - Li,Tie, Y1 - 2017/08/01/ PY - 2017/05/15/received PY - 2017/07/20/revised PY - 2017/07/22/accepted PY - 2017/8/6/pubmed PY - 2018/7/3/medline PY - 2017/8/6/entrez KW - DGT KW - East China Sea KW - Iron KW - Marine sediment KW - Phosphorus KW - Sulfide SP - 400 EP - 410 JF - Marine pollution bulletin JO - Mar Pollut Bull VL - 124 IS - 1 N2 - Dissolved sulfide, iron (Fe), and phosphorus (P) concentrations in sediments of the East China Sea were simultaneously measured in situ by diffusive gradients in thin films (DGT) technique. The results, by combination with solid-phase Fe speciation, were used to characterize the interplays of Fe, S and P. Diverse distributions of dissolved sulfide among the sites are attributable to highly dynamic diagenetic regimes and varying availability of labile organic carbon (OC). The DGT technique provided high-resolution evidence for coexistence of microbial iron reduction (MIR) and sulfate reduction in localized zones, and for Fe-coupled P mobilization. Measured Fe2+/P ratios suggest that Fe2+ reoxidatiion at the oxic zones can serve as an efficient scavenger of P. Empirical estimation indicates that MIR plays an important role in anaerobic OC mineralization in the sediments, which is a combined result of low availability of labile OC, high reactive Fe content, and unsteady diagenetic regimes. SN - 1879-3363 UR - https://www.unboundmedicine.com/medline/citation/28778383/In_situ_high_resolution_DGT_measurements_of_dissolved_sulfide_iron_and_phosphorus_in_sediments_of_the_East_China_Sea:_Insights_into_phosphorus_mobilization_and_microbial_iron_reduction_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0025-326X(17)30648-3 DB - PRIME DP - Unbound Medicine ER -