Tags

Type your tag names separated by a space and hit enter

Combined Fe/P and Fe/S ratios as a practicable index for estimating the release potential of internal-P in freshwater sediment.
Environ Sci Pollut Res Int. 2018 Apr; 25(11):10740-10751.ES

Abstract

Release of phosphorus (P) from sediment is a major source of P in many freshwater lakes. Currently, assessing the ability of sediment to release P, which is valuable to the management of water eutrophication, remains a challenge. Thus, the purpose of this study was to find effective indexes for predicting the release potential of internal-P. In this study, high-resolution diffusive gradients in thin films (DGT) and conventional sequential extraction were used to characterize the distribution and speciation of P, iron (Fe), and sulfur (S) in the surface sediment of a mildly eutrophic reservoir in southwestern China. Sediment samples exhibited large variations in Fe, S, and P, thereby providing favorable conditions for investigating the effects of Fe and S on sediment P mobilization. In contrast to traditional knowledge, our results show that total P (TP) and redox-sensitive P(BD-P) are poorly correlated with releasable P(DGT-P). This implies that high levels of sedimentary TP and BD-P do not necessarily result in an elevated release of internal-P under anaerobic conditions. Sedimentary P release was greatly suppressed at ratios of Fe/P > 30 and Fe/S > 6. Significant positive correlations between DGT-P and DGT-Fe or DGT-S suggest that Fe and S play an important role in governing the mobility of sedimentary P. These results support the combined Fe/P and Fe/S ratios as an effective and practicable index for assessing the ability of sediment to release P. Thus, our study provides a new and simple method for assessing sedimentary P pollution in freshwater ecosystems.

Authors+Show Affiliations

State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang, 550002, People's Republic of China.State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang, 550002, People's Republic of China. chenjingan@vip.skleg.cn.State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang, 550002, People's Republic of China.State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang, 550002, People's Republic of China. College of Resources and Environment, University of Chinese Academy of Sciences, Beijing, 100049, People's Republic of China.State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang, 550002, People's Republic of China.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

29396822

Citation

Wang, Jingfu, et al. "Combined Fe/P and Fe/S Ratios as a Practicable Index for Estimating the Release Potential of internal-P in Freshwater Sediment." Environmental Science and Pollution Research International, vol. 25, no. 11, 2018, pp. 10740-10751.
Wang J, Chen J, Guo J, et al. Combined Fe/P and Fe/S ratios as a practicable index for estimating the release potential of internal-P in freshwater sediment. Environ Sci Pollut Res Int. 2018;25(11):10740-10751.
Wang, J., Chen, J., Guo, J., Sun, Q., & Yang, H. (2018). Combined Fe/P and Fe/S ratios as a practicable index for estimating the release potential of internal-P in freshwater sediment. Environmental Science and Pollution Research International, 25(11), 10740-10751. https://doi.org/10.1007/s11356-018-1373-z
Wang J, et al. Combined Fe/P and Fe/S Ratios as a Practicable Index for Estimating the Release Potential of internal-P in Freshwater Sediment. Environ Sci Pollut Res Int. 2018;25(11):10740-10751. PubMed PMID: 29396822.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Combined Fe/P and Fe/S ratios as a practicable index for estimating the release potential of internal-P in freshwater sediment. AU - Wang,Jingfu, AU - Chen,Jingan, AU - Guo,Jianyang, AU - Sun,Qingqing, AU - Yang,Haiquan, Y1 - 2018/02/02/ PY - 2017/10/09/received PY - 2018/01/22/accepted PY - 2018/2/6/pubmed PY - 2018/12/12/medline PY - 2018/2/4/entrez KW - DGT KW - Fe/P KW - Fe/S KW - Phosphorus KW - Release potential KW - Sediment SP - 10740 EP - 10751 JF - Environmental science and pollution research international JO - Environ Sci Pollut Res Int VL - 25 IS - 11 N2 - Release of phosphorus (P) from sediment is a major source of P in many freshwater lakes. Currently, assessing the ability of sediment to release P, which is valuable to the management of water eutrophication, remains a challenge. Thus, the purpose of this study was to find effective indexes for predicting the release potential of internal-P. In this study, high-resolution diffusive gradients in thin films (DGT) and conventional sequential extraction were used to characterize the distribution and speciation of P, iron (Fe), and sulfur (S) in the surface sediment of a mildly eutrophic reservoir in southwestern China. Sediment samples exhibited large variations in Fe, S, and P, thereby providing favorable conditions for investigating the effects of Fe and S on sediment P mobilization. In contrast to traditional knowledge, our results show that total P (TP) and redox-sensitive P(BD-P) are poorly correlated with releasable P(DGT-P). This implies that high levels of sedimentary TP and BD-P do not necessarily result in an elevated release of internal-P under anaerobic conditions. Sedimentary P release was greatly suppressed at ratios of Fe/P > 30 and Fe/S > 6. Significant positive correlations between DGT-P and DGT-Fe or DGT-S suggest that Fe and S play an important role in governing the mobility of sedimentary P. These results support the combined Fe/P and Fe/S ratios as an effective and practicable index for assessing the ability of sediment to release P. Thus, our study provides a new and simple method for assessing sedimentary P pollution in freshwater ecosystems. SN - 1614-7499 UR - https://www.unboundmedicine.com/medline/citation/29396822/Combined_Fe/P_and_Fe/S_ratios_as_a_practicable_index_for_estimating_the_release_potential_of_internal_P_in_freshwater_sediment_ L2 - https://dx.doi.org/10.1007/s11356-018-1373-z DB - PRIME DP - Unbound Medicine ER -