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![]() ![]() ![]() ![]() ![]() | |
2022 | |
Source Publication | Water
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Volume | 14Issue: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. |
Keyword | La-modified Material macrophyte sediments phosphorus eutrophication |
DOI | 10.3390/w14121847 |
URL | 查看原文 |
Indexed By | SCI |
Language | 英语 |
Citation statistics | |
Document Type | 期刊论文 |
Identifier | http://ir.gyig.ac.cn/handle/42920512-1/13482 |
Collection | 环境地球化学国家重点实验室 |
Affiliation | 1.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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