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Synergistic Effects and Ecological Responses of Combined In Situ Passivation and Macrophytes toward the Water Quality of a Macrophytes-Dominated Eutrophic Lake
Wei Yu; Haiquan Yang; Yongqiong Yang; Jingan Chen; Peng Liao; Jingfu Wang; Jiaxi Wu; Yun He; Dan Xu
2022
Source PublicationWater
Volume14Issue:12Pages:1847
Abstract

Combined use of in situ passivation and macrophytes is a valuable technology that exerts remarkable effects on aquatic systems. However, the effectiveness and ecological functions of this combined technology for macrophytes-dominated eutrophic (MDE) lakes with organophosphorus-controlled internal phosphorus (P) loading were poorly understood. In this study, aquatic simulation experiments were performed to study the combination of La-modified materials (LMM; La-modified bentonite (LMB), and La/Al co-modified attapulgite (LAA)) with macrophytes (Myriophyllum verticillatum L. (MVL), Hydrilla verticillata (Linn. f.) royle (HVR), and Ceratophyllum demersum L. (CDL)) for the control of P mobility in the water column, and to investigate the passivator effects on the physiological characteristics of macrophytes. The mineralization of organophosphates (BD-Po, HCl-Po, and Res-Po) is an important factor for maintaining high internal P loadings and overlying water P concentrations in the experiments. Compared with individual treatment groups, the reduction of internal P release flux and porewater SRP concentrations was more obvious in the combined treatments. Moreover, the redox-sensitive P forms transformation is more pronounced in the surface sediments. In the LAA+M group, internal P release flux was reduced by 55% and 55% compared with individual passivators and macrophytes retreatment groups, respectively. In contrast, the LMB+M group decreased by 16% and 46%, respectively. Simultaneously, LMM had less effect on macrophytes traits compared with individual macrophytes group and enhanced the absorption of phosphate by macrophytes. The phosphate content of macrophytes in the LAA+M and LMB+M groups increased by 24% and 11%, respectively, in comparison with the individual macrophytes group. Results concluded that the combination of passivator and macrophytes enhanced the effect of ecological restoration and exerts a synergistic effect on internal P pollution with macrophytes.

KeywordLa-modified Material macrophyte sediments phosphorus eutrophication
DOI10.3390/w14121847
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Indexed BySCI
Language英语
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Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.gyig.ac.cn/handle/42920512-1/13482
Collection环境地球化学国家重点实验室
Affiliation1.Chinese Acad Sci, Inst Geochem, State Key Lab Environm Geochem, Guiyang 550081, Peoples R China
2.Guizhou Normal Univ, Sch Geog & Environm Sci, Guiyang 550025, Peoples R China
3.Guizhou Univ, Coll Resource & Environm Engn, Guiyang 550025, Peoples R China
4.Guizhou Minzu Univ, Coll Ecoenvironm Engn, Guiyang 550025, Peoples R China
Recommended Citation
GB/T 7714
Wei Yu,Haiquan Yang,Yongqiong Yang,et al. Synergistic Effects and Ecological Responses of Combined In Situ Passivation and Macrophytes toward the Water Quality of a Macrophytes-Dominated Eutrophic Lake[J]. Water,2022,14(12):1847.
APA Wei Yu.,Haiquan Yang.,Yongqiong Yang.,Jingan Chen.,Peng Liao.,...&Dan Xu.(2022).Synergistic Effects and Ecological Responses of Combined In Situ Passivation and Macrophytes toward the Water Quality of a Macrophytes-Dominated Eutrophic Lake.Water,14(12),1847.
MLA Wei Yu,et al."Synergistic Effects and Ecological Responses of Combined In Situ Passivation and Macrophytes toward the Water Quality of a Macrophytes-Dominated Eutrophic Lake".Water 14.12(2022):1847.
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