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Reactive iron and its buffering capacity towards dissolved sulfide in sediments of Jiaozhou Bay, China.
Mar Environ Res. 2012 Sep; 80:46-55.ME

Abstract

Reactive iron (Fe) oxides in marine sediments play a critical role in removal of free sulfide. In this study, 0.5 and 6 N HCl-extractable Fe, acid volatile sulfide (AVS), and pyrite were examined in sediments at three sites of eutrophic Jiaozhou Bay to investigate the interactions of sulfur and Fe and possible influences of eutrophication on free sulfide removal. The results indicate that formation and accumulation of AVS and pyrite are limited by low availability of labile organic matter, despite eutrophication of the bay water. Quick buffering of free sulfide proceeded mainly via consumption of 0.5 N HCl-extractable Fe (labile Fe), however, the consumption did not result in a depletion of the Fe pool. High residual buffering capacity enables a quick removal of free sulfide in porewater, and thereby it is difficult for sulfide to accumulate and to cause detrimental effects on benthic organisms at the present steady state. Significant effects of eutrophication on Fe and sulfur geochemistry is restricted only to the estuarine sediments which were subject to direct wastewater discharges, whereas no such effects were observed in other sediments of the bay.

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. zhumaoxu@ouc.edu.cnNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

22840195

Citation

Zhu, Mao-Xu, et al. "Reactive Iron and Its Buffering Capacity Towards Dissolved Sulfide in Sediments of Jiaozhou Bay, China." Marine Environmental Research, vol. 80, 2012, pp. 46-55.
Zhu MX, Liu J, Yang GP, et al. Reactive iron and its buffering capacity towards dissolved sulfide in sediments of Jiaozhou Bay, China. Mar Environ Res. 2012;80:46-55.
Zhu, M. X., Liu, J., Yang, G. P., Li, T., & Yang, R. J. (2012). Reactive iron and its buffering capacity towards dissolved sulfide in sediments of Jiaozhou Bay, China. Marine Environmental Research, 80, 46-55. https://doi.org/10.1016/j.marenvres.2012.06.010
Zhu MX, et al. Reactive Iron and Its Buffering Capacity Towards Dissolved Sulfide in Sediments of Jiaozhou Bay, China. Mar Environ Res. 2012;80:46-55. PubMed PMID: 22840195.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Reactive iron and its buffering capacity towards dissolved sulfide in sediments of Jiaozhou Bay, China. AU - Zhu,Mao-Xu, AU - Liu,Juan, AU - Yang,Gui-Peng, AU - Li,Tie, AU - Yang,Ru-Jun, Y1 - 2012/07/10/ PY - 2012/05/01/received PY - 2012/06/26/revised PY - 2012/06/28/accepted PY - 2012/7/31/entrez PY - 2012/7/31/pubmed PY - 2012/12/12/medline SP - 46 EP - 55 JF - Marine environmental research JO - Mar Environ Res VL - 80 N2 - Reactive iron (Fe) oxides in marine sediments play a critical role in removal of free sulfide. In this study, 0.5 and 6 N HCl-extractable Fe, acid volatile sulfide (AVS), and pyrite were examined in sediments at three sites of eutrophic Jiaozhou Bay to investigate the interactions of sulfur and Fe and possible influences of eutrophication on free sulfide removal. The results indicate that formation and accumulation of AVS and pyrite are limited by low availability of labile organic matter, despite eutrophication of the bay water. Quick buffering of free sulfide proceeded mainly via consumption of 0.5 N HCl-extractable Fe (labile Fe), however, the consumption did not result in a depletion of the Fe pool. High residual buffering capacity enables a quick removal of free sulfide in porewater, and thereby it is difficult for sulfide to accumulate and to cause detrimental effects on benthic organisms at the present steady state. Significant effects of eutrophication on Fe and sulfur geochemistry is restricted only to the estuarine sediments which were subject to direct wastewater discharges, whereas no such effects were observed in other sediments of the bay. SN - 1879-0291 UR - https://www.unboundmedicine.com/medline/citation/22840195/Reactive_iron_and_its_buffering_capacity_towards_dissolved_sulfide_in_sediments_of_Jiaozhou_Bay_China_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0141-1136(12)00121-3 DB - PRIME DP - Unbound Medicine ER -