The phosphorus speciations in the sediments up- and down-stream of cascade dams along the middle Lancang River

Liu, Qi; Liu, Shiliang; Zhao, Haidi; Deng, Li; Wang, Cong; Zhao, Qinghe

doi:10.1016/j.chemosphere.2014.10.012

Cited by 65 publications

(32 citation statements)

References 40 publications

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“…Bio-available phosphorus (BAP) is defined as the sum of NH 4 Cl-P, BD-P, and NaOH-P, and this value can be used to estimate the potential available P for plants or algae [8,46]. It can be easily desorbed form sediments and released into the overlying water when environmental conditions change, and has a close relationship with water quality and the type of water ecosystem [37].…”

Section: Distribution Characteristics Of Bio-availablementioning

confidence: 99%

Distribution and Environmental Significance of Phosphorus Forms in Riparian Soils and River Sediments of Jianxi Basin, Fujian Province

Ye¹,

Yuan²,

Zhou³

et al. 2017

Pol. J. Environ. Stud.

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Section: Distribution Characteristics Of Bio-availablementioning

confidence: 99%

Distribution and Environmental Significance of Phosphorus Forms in Riparian Soils and River Sediments of Jianxi Basin, Fujian Province

Ye¹,

Yuan²,

Zhou³

et al. 2017

Pol. J. Environ. Stud.

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“…L'enrichissement des sédiments en P vers le barrage est inversement corrélé avec la granulométrie (LUCAS et al, 2015), car les particules les plus fines sont les plus réactives. De plus, par rapport à d'autres sédiments de granulométrie similaire, les teneurs en P de ces sédiments sont élevées (DERRAZ et al, 2005;LIU et al, 2015).…”

Section: Caractéristiques Générales Du Sédimentunclassified

Distribution spatiale et mobilité du phosphore sédimentaire dans une retenue hydroélectrique

Deluchat

Rabiet

Grybos

et al. 2017

rseau

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Malgré la réduction des rejets de phosphore (P) dans l’environnement, les efflorescences phytoplanctoniques sont toujours observées dans un grand nombre de masses d’eau. C’est notamment le cas dans les retenues de barrage où la perturbation de la continuité sédimentaire peut conduire à une accumulation importante de phosphore au sein du compartiment sédimentaire. Ainsi, pour lutter contre l’eutrophisation, une meilleure connaissance de la distribution, de la réactivité et de la mobilité du P sédimentaire s’avère indispensable. Dans ce contexte, les sédiments de surface de la retenue de Champsanglard (Creuse, France) ont été prélevés en différents points selon un gradient amont/aval. Une caractérisation physico-chimique (granulométrie; teneurs en P, Fe, Al, matière organique; fractionnement chimique du P suivant le protocole de RYDIN et WELCH [1998]) a été effectuée afin d’évaluer le potentiel de relargage de P de ces sédiments. Les résultats montrent une évolution de la concentration et de la distribution du P dans les sédiments de surface dans la retenue de l’amont vers l’aval (de 1,5 à 2,3 mg P∙gsec‑1), qui semble corrélée avec l’évolution de la granulométrie. L’analyse du fractionnement chimique a montré que le P était majoritairement lié aux oxyhydroxydes de Fe et Mn amorphes (66 %), ces concentrations augmentant également à l’approche du barrage. Ces résultats indiquent que les conditions d’oxydoréduction sont l’un des paramètres clés du contrôle de la remobilisation du P sédimentaire vers la colonne d’eau. À l’opposé, le P associé aux fractions de la matière organique et de l’aluminium ne semble quant à lui ne pas évoluer spatialement de façon significative.Despite the reduction of phosphorus (P) discharged into the environment, phytoplankton blooms are still observed in many water bodies, especially in dam reservoirs where the disturbance of sediment continuity could lead to a significant accumulation of sedimentary phosphorus. Thus, a better understanding of the distribution, reactivity and mobility of sedimentary P is essential in the control of eutrophication. In this context, the surface sediments of Champsanglard reservoir (Creuse, France) were sampled at different points along an upstream/downstream gradient. A physicochemical characterization (particle size; P, Fe, Al and organic matter content; P fractionation following the modified protocol of RYDIN and WELCH [1998]) was conducted to assess the potential leaching of P from the sediment. Results show an evolution of the concentration and distribution of P within the dam reservoir from upstream to downstream (from 1.5 to 2.3 mg P∙gdw‑1), potentially correlated with the particle size. Chemical fractionation results show that P was predominantly associated with amorphous Fe and Mn oxyhydroxides (66%) and concentrations increased with distance down-reservoir. This result suggests that the redox conditions are one of the key parameters controlling the remobilization of sedimentary P into the water column. In contrast, P bound to the organic matter and A...

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“…This also indicates that the tributaries have unique geographical conditions and are greatly disturbed by human activities.The chemical forms of phosphorus in sediment have an important effect on its release. Liu et al[33] studied the distribution of phosphorus speciation in the sediments of the Xiaowan, Manwan and Dachaoshan Reservoirs. There, the highest content of calcium-bound phosphorus (HCl-P) was 49.69% in the Manwan Reservoir, and the highest content of metal oxide-bound phosphorus (NaOH-P) was 57.21% and 55.19% in Xiaowan and Dachaoshan Reservoirs, respectively.…”

mentioning

confidence: 99%

Spatial Distribution of Carbon, Nitrogen and Phosphorus within Surface Sediments in the Lower Lancang River: Pollution Assessment Related to Dams

Hong-jun¹,

Fu²,

Peng³

et al. 2018

JEP

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Surface sediment is one of the main sources of nutrients in overlying water environments, and these can also indirectly reflect the degree of eutrophication. In this paper, the spatial distribution characteristics of total organic carbon (TOC), total nitrogen (TN) and total phosphorus (TP) in the surface sediments of 11 sections in the lower Lancang River during flood season are analyzed, as well as the distribution of phosphorus in different forms. The main sources of TOC and its correlation with TN and TP are discussed and, finally, the pollution levels of the surface sediments are evaluated. The results show that the average content of TOC in the surface sediments of the lower Lancang River is 9003.75 mg/kg. The average TN content is 893.79 mg/kg, while the average TP content is 521.35 mg/kg. The TOC in the surface sediments of the lower Lancang River is derived mainly from algae and plankton in the river, and the TN and TP have similar sources. The total phosphorus in the surface sediments of the lower Lancang River is composed mainly of calcium-bound phosphorus (Ca-P). The evaluations of the organic pollution index and comprehensive pollution index show that the surface sediment pollution degree at the upper sections of the Nuozhadu and Jinghong Dams are more serious than those below the dams. Furthermore, the tributary sections are all slightly polluted, with the exception of the Mengyang River, which is considered moderately polluted.

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The phosphorus speciations in the sediments up- and down-stream of cascade dams along the middle Lancang River

Cited by 65 publications

References 40 publications

Distribution and Environmental Significance of Phosphorus Forms in Riparian Soils and River Sediments of Jianxi Basin, Fujian Province

Distribution and Environmental Significance of Phosphorus Forms in Riparian Soils and River Sediments of Jianxi Basin, Fujian Province

Distribution spatiale et mobilité du phosphore sédimentaire dans une retenue hydroélectrique

Spatial Distribution of Carbon, Nitrogen and Phosphorus within Surface Sediments in the Lower Lancang River: Pollution Assessment Related to Dams

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