Tags

Type your tag names separated by a space and hit enter

Seasonal iron‑sulfur interactions and the stimulated phosphorus mobilization in freshwater lake sediments.
Sci Total Environ. 2021 May 10; 768:144336.ST

Abstract

Sulfur reduction in freshwater ecosystems has previously been considered as negligible because of often very low sulfate concentrations and generally low sulfate reducing capacity in freshwater sediments. In this study, seasonal variations on three types of sediments from central lake, dredged and algae accumulated areas in a eutrophic lake in China, Lake Taihu, were investigated. The high temperature in summer and the accumulation of algae are conducive to the reduction processes in freshwater lake sediments. Iron reduction was observed as the major anaerobic process in all types of sediments, while sulfate reduction was weak in central and dredged lake areas. However, strong sulfate reduction with increase of sulfate reducing bacteria and sulfides generation (119.5 ± 0.2 μmol L-1) was found in surface sediments in algae accumulated areas. Based on the results of Fe reduction rate and the quantity of Fe reducing bacteria, extensive sulfate reduction in algae accumulated sediments inhibited the microbial Fe reduction, and the ΣS2--mediated chemical Fe reduction (SCIR) dominated instead. Iron was principally stored in the sediments as Fe sulfide compounds, which weakened the rebinding of phosphorus and stimulated phosphorus mobilization. Therefore, attention should be paid to the alteration of Fe cycling and phosphorus mobility caused by the SCIR in algae accumulated sediments and the consequent effects on the eutrophication of freshwater lakes.

Authors+Show Affiliations

School of Environment, Nanjing Normal University, Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application, Jiangsu Key Laboratory of Environmental Change and Ecological Construction, Nanjing 210,023, China.School of Environment, Nanjing Normal University, Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application, Jiangsu Key Laboratory of Environmental Change and Ecological Construction, Nanjing 210,023, China.School of Environment, Nanjing Normal University, Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application, Jiangsu Key Laboratory of Environmental Change and Ecological Construction, Nanjing 210,023, China.School of Environment, Nanjing Normal University, Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application, Jiangsu Key Laboratory of Environmental Change and Ecological Construction, Nanjing 210,023, China.School of Environment, Nanjing Normal University, Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application, Jiangsu Key Laboratory of Environmental Change and Ecological Construction, Nanjing 210,023, China.School of Environment, Nanjing Normal University, Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application, Jiangsu Key Laboratory of Environmental Change and Ecological Construction, Nanjing 210,023, China.School of Environment, Nanjing Normal University, Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application, Jiangsu Key Laboratory of Environmental Change and Ecological Construction, Nanjing 210,023, China.. Electronic address: wangguoxiang@njnu.edu.cn.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

33453539

Citation

Zhao, Yanping, et al. "Seasonal Iron‑sulfur Interactions and the Stimulated Phosphorus Mobilization in Freshwater Lake Sediments." The Science of the Total Environment, vol. 768, 2021, p. 144336.
Zhao Y, Wu S, Yu M, et al. Seasonal iron‑sulfur interactions and the stimulated phosphorus mobilization in freshwater lake sediments. Sci Total Environ. 2021;768:144336.
Zhao, Y., Wu, S., Yu, M., Zhang, Z., Wang, X., Zhang, S., & Wang, G. (2021). Seasonal iron‑sulfur interactions and the stimulated phosphorus mobilization in freshwater lake sediments. The Science of the Total Environment, 768, 144336. https://doi.org/10.1016/j.scitotenv.2020.144336
Zhao Y, et al. Seasonal Iron‑sulfur Interactions and the Stimulated Phosphorus Mobilization in Freshwater Lake Sediments. Sci Total Environ. 2021 May 10;768:144336. PubMed PMID: 33453539.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Seasonal iron‑sulfur interactions and the stimulated phosphorus mobilization in freshwater lake sediments. AU - Zhao,Yanping, AU - Wu,Songjun, AU - Yu,Miaotong, AU - Zhang,Zhongqian, AU - Wang,Xuan, AU - Zhang,Siyuan, AU - Wang,Guoxiang, Y1 - 2020/12/25/ PY - 2020/08/13/received PY - 2020/12/03/revised PY - 2020/12/03/accepted PY - 2021/1/17/pubmed PY - 2021/3/12/medline PY - 2021/1/16/entrez KW - Freshwater ecosystem KW - Iron, sulfate reduction KW - Organic matter KW - Phosphorus mobilization SP - 144336 EP - 144336 JF - The Science of the total environment JO - Sci Total Environ VL - 768 N2 - Sulfur reduction in freshwater ecosystems has previously been considered as negligible because of often very low sulfate concentrations and generally low sulfate reducing capacity in freshwater sediments. In this study, seasonal variations on three types of sediments from central lake, dredged and algae accumulated areas in a eutrophic lake in China, Lake Taihu, were investigated. The high temperature in summer and the accumulation of algae are conducive to the reduction processes in freshwater lake sediments. Iron reduction was observed as the major anaerobic process in all types of sediments, while sulfate reduction was weak in central and dredged lake areas. However, strong sulfate reduction with increase of sulfate reducing bacteria and sulfides generation (119.5 ± 0.2 μmol L-1) was found in surface sediments in algae accumulated areas. Based on the results of Fe reduction rate and the quantity of Fe reducing bacteria, extensive sulfate reduction in algae accumulated sediments inhibited the microbial Fe reduction, and the ΣS2--mediated chemical Fe reduction (SCIR) dominated instead. Iron was principally stored in the sediments as Fe sulfide compounds, which weakened the rebinding of phosphorus and stimulated phosphorus mobilization. Therefore, attention should be paid to the alteration of Fe cycling and phosphorus mobility caused by the SCIR in algae accumulated sediments and the consequent effects on the eutrophication of freshwater lakes. SN - 1879-1026 UR - https://www.unboundmedicine.com/medline/citation/33453539/Seasonal_iron‑sulfur_interactions_and_the_stimulated_phosphorus_mobilization_in_freshwater_lake_sediments_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0048-9697(20)37867-0 DB - PRIME DP - Unbound Medicine ER -