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Phosphorus mobilization in lake sediments: Experimental evidence of strong control by iron and negligible influences of manganese redox reactions.
Environ Pollut. 2019 Mar; 246:472-481.EP

Abstract

Iron (Fe) and manganese (Mn) reactions have been regarded as the primary factors responsible for the mobilization of phosphorus (P) in lake sediments, although their individual roles are hard to distinguish. In this study, in situ mobilization of P, Fe and Mn in sediments was assessed by high resolution spatio-temporal sampling of their labile forms using diffusive gradient in thin films (DGT) and suction device (Rhizon) techniques. It was found that the monthly concentration distributions showed greater agreement and better correlation coefficients between labile P and labile Fe, than those between labile P and labile Mn, implying that Fe plays a key role in controlling P release in sediments. Furthermore, better correlations were observed between hourly changes in concentrations of soluble reactive phosphorus (SRP) and soluble Fe(II), than those between SRP and soluble Mn. Changes were observed under simulated anaerobic incubation conditions, suggesting that P release was caused by the reductive dissolution of Fe oxides. This was supported by the lack of influences on P release from reductive dissolution of Mn oxides in the sediment-water interface and top sediment layers under the anaerobic incubations. In simulated algal bloom experiments, positive correlations and consistent changes were observed between SRP and soluble Fe(II) concentrations, but not between SRP and soluble Mn concentrations. This further demonstrated the Fe-dependent and Mn-independent release of P in sediments. Therefore, Fe redox reactions have a high impact on P mobilization in sediments, while Mn redox reactions appear to have negligible influences.

Authors+Show Affiliations

State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing, 210008, China.State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing, 210008, China. Electronic address: smding@niglas.ac.cn.State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing, 210008, China.State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing, 210008, China.State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing, 210008, China; University of Chinese Academy of Sciences, Beijing, 100049, China.Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China.State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing, 210008, China; Nanjing EasySensor Environmental Technology Co., Ltd, Nanjing, 210018, China.International Network for Environment and Health, School of Geography and Archaeology and Ryan Institute, National University of Ireland, Galway, Ireland.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

30583155

Citation

Chen, Musong, et al. "Phosphorus Mobilization in Lake Sediments: Experimental Evidence of Strong Control By Iron and Negligible Influences of Manganese Redox Reactions." Environmental Pollution (Barking, Essex : 1987), vol. 246, 2019, pp. 472-481.
Chen M, Ding S, Wu Y, et al. Phosphorus mobilization in lake sediments: Experimental evidence of strong control by iron and negligible influences of manganese redox reactions. Environ Pollut. 2019;246:472-481.
Chen, M., Ding, S., Wu, Y., Fan, X., Jin, Z., Tsang, D. C. W., Wang, Y., & Zhang, C. (2019). Phosphorus mobilization in lake sediments: Experimental evidence of strong control by iron and negligible influences of manganese redox reactions. Environmental Pollution (Barking, Essex : 1987), 246, 472-481. https://doi.org/10.1016/j.envpol.2018.12.031
Chen M, et al. Phosphorus Mobilization in Lake Sediments: Experimental Evidence of Strong Control By Iron and Negligible Influences of Manganese Redox Reactions. Environ Pollut. 2019;246:472-481. PubMed PMID: 30583155.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Phosphorus mobilization in lake sediments: Experimental evidence of strong control by iron and negligible influences of manganese redox reactions. AU - Chen,Musong, AU - Ding,Shiming, AU - Wu,Yuexia, AU - Fan,Xianfang, AU - Jin,Zengfeng, AU - Tsang,Daniel C W, AU - Wang,Yan, AU - Zhang,Chaosheng, Y1 - 2018/12/13/ PY - 2018/07/01/received PY - 2018/12/10/revised PY - 2018/12/11/accepted PY - 2018/12/26/pubmed PY - 2019/3/21/medline PY - 2018/12/25/entrez KW - Diffusive gradients in thin films KW - Eutrophic lake KW - Phosphorus KW - Sediments KW - Spatio-temporal analysis SP - 472 EP - 481 JF - Environmental pollution (Barking, Essex : 1987) JO - Environ Pollut VL - 246 N2 - Iron (Fe) and manganese (Mn) reactions have been regarded as the primary factors responsible for the mobilization of phosphorus (P) in lake sediments, although their individual roles are hard to distinguish. In this study, in situ mobilization of P, Fe and Mn in sediments was assessed by high resolution spatio-temporal sampling of their labile forms using diffusive gradient in thin films (DGT) and suction device (Rhizon) techniques. It was found that the monthly concentration distributions showed greater agreement and better correlation coefficients between labile P and labile Fe, than those between labile P and labile Mn, implying that Fe plays a key role in controlling P release in sediments. Furthermore, better correlations were observed between hourly changes in concentrations of soluble reactive phosphorus (SRP) and soluble Fe(II), than those between SRP and soluble Mn. Changes were observed under simulated anaerobic incubation conditions, suggesting that P release was caused by the reductive dissolution of Fe oxides. This was supported by the lack of influences on P release from reductive dissolution of Mn oxides in the sediment-water interface and top sediment layers under the anaerobic incubations. In simulated algal bloom experiments, positive correlations and consistent changes were observed between SRP and soluble Fe(II) concentrations, but not between SRP and soluble Mn concentrations. This further demonstrated the Fe-dependent and Mn-independent release of P in sediments. Therefore, Fe redox reactions have a high impact on P mobilization in sediments, while Mn redox reactions appear to have negligible influences. SN - 1873-6424 UR - https://www.unboundmedicine.com/medline/citation/30583155/Phosphorus_mobilization_in_lake_sediments:_Experimental_evidence_of_strong_control_by_iron_and_negligible_influences_of_manganese_redox_reactions_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0269-7491(18)32968-3 DB - PRIME DP - Unbound Medicine ER -