General characteristics and fractions of phosphorus in aquatic sediments of two tropical reservoirs

Ting, Ding-Sie; Appan, Adhityan

doi:10.2166/wst.1996.0601

Cited by 29 publications

(4 citation statements)

References 8 publications

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“…This methodology is based on the different thermodynamic solubilities of sediment components and implies successive extractions with acid, alkaline or complexing solutions in order to sequentially dissolve oxides and salts, and extract their associated phosphate. Sequential extraction is widely used [ Ding‐Sie and Adhityan , 1996; Olila and Reddy , 1997; Goedkoop and Petterson , 2000; Rydin , 2000; Kim et al , 2003] because it is easy to carry out and gives valuable information. Different sequential extraction techniques are described in the literature for phosphate.…”

Section: Introductionmentioning

confidence: 99%

Phosphate concentration and association as revealed by sequential extraction and microprobe analysis: The case of sediments from two Argentinean reservoirs

Borgnino

Oroná

Avena

et al. 2006

Water Resources Research

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[1] This article reports the general characteristics of the sediments of two Argentinean reservoirs, which are used for water supply. The chemical composition, granulometry, and specific surface area are presented together with a study of total phosphate concentration and phosphate association by combining sequential extraction and microprobe analysis. In general, the sediments of both reservoirs have similar characteristics. Sequential extraction reveals that the main P fractions in the studied sediments are Ca-bound phosphate in river mouths and Fe-bound phosphate in the rest of the reservoir stations. Microprobe analysis appears to be an important complementary technique to sequential extraction. Combined with chemical fractionation and specific surface area measurements, these analyses indicate that Ca-bound phosphate is mainly distributed within grains or particles highly concentrated in Ca and P, whereas Fe-bound phosphate is rather homogeneously distributed in the sediments at the surface of fine particles. Microprobe analyses also revealed an important coating of phyllosilicate surfaces with Fe (hydr)oxides, which explains the good correlation found between Fe-bound phosphate, clay fraction, and specific surface area. The role of sediments as a potential source of phosphate is discussed in terms of P association in the solid phase and dissolved oxygen concentration profiles in the water column.

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Section: Introductionmentioning

confidence: 99%

Phosphate concentration and association as revealed by sequential extraction and microprobe analysis: The case of sediments from two Argentinean reservoirs

Borgnino

Oroná

Avena

et al. 2006

Water Resources Research

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“…Quantification of phosphorus fractions in the sediment is important in elucidating the potential of sediment as a source or sink of phosphorus (Ding-Sie and Appan 1996).…”

mentioning

confidence: 99%

Effect of an impoundment on nutrient dynamics in the Kihansi River, Tanzania

Ideva

Machiwa

Schiemer

et al. 2008

African Journal of Aquatic Science

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The impact of the Kihansi Dam on electrical conductivity, pH, temperature and dissolved oxygen in the Kihansi River was assessed in 2005 after 85% of the original river flow had been diverted to the Lower Kihansi power plant. The results are compared with the data obtained in 1995 before the dam was constructed. Primary production and nitrogen and phosphorus concentrations from sites upstream and downstream of the dam as well as in the reservoir were compared. Phosphorus fractions were determined in the reservoir's sediment. Electrical conductivity and pH values were higher in 2005 than in 1995, whereas oxygen concentrations were lower. Primary production, nitrogen and phosphorus concentrations were lower at stations downstream of the dam than at upstream stations. High fractions of iron-and manganese-bound phosphorus in the reservoir sediment suggest a potential for phosphorus retention. Concentrations of nitrogen and phosphorus along the Kihansi River were higher during the dry season than in the wet season. These results contribute to the documented baseline data on environmental changes in tropical river systems after flow diversion and reservoir development.

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“…In the XW and NZD reservoirs, the DO content in the overlying water varied between 0.9 and 7.8 mg/L (Table 2). Except for NZD-C, the other sampling sites were under hypoxic conditions, which can promote the release of P in the sediments [6,52]. The high DO content and low water depth in NZD-C resulted in an oxidizing condition that was unfavorable for the release of internal P [53,54].…”

Section: Available P In Sedimentmentioning

confidence: 99%

Synchronous Cycle of Available Phosphorus, Iron, and Sulfur in the Sediment of Lancang River Reservoirs

Cheng

Huang

et al. 2021

Water

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Large-scale deep reservoirs associated with hydropower cascade development are known to influence the cycle of phosphorus (P). However, there is scarce information on the fractions and availability of P in sediments of large-scale deep reservoirs constructed due to hydropower cascade development. In this study, we researched the fractions and release mechanism of P in the sediments of large-scale deep reservoirs by analyzing the fractions and availability of P in the sediments of the Xiaowan (XW) and Nuozhadu (NZD) reservoirs in the middle and lower reaches of the Lancang River (China). According to the results, there is a significant difference in the P fractions in the sediments of the XW and NZD reservoirs, but not for the available P in the sediments. Compared to the NZD reservoir, there was less solid bioavailable phosphorus (BAP) in the sediments of the XW reservoir, but the replenishment degree of active solid phase P into pore water was higher in the XW. There was a significant positive correlation between the available P and the BAP; the Fe/P ratio measured by the diffusive gradients in thin films reflects the control of active iron (oxyhydr) oxides over labile P in the sediments. In addition to the reductive dissolution of iron-bound P, the release of P into the large deep reservoirs may be related to factors such as the sulfate reduction and the degradation of organic materials. The P cycling in deep reservoir sediments is mainly controlled by the Fe, and there is a clear spatial distribution of this mechanism in deep reservoirs.

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General characteristics and fractions of phosphorus in aquatic sediments of two tropical reservoirs

Cited by 29 publications

References 8 publications

Phosphate concentration and association as revealed by sequential extraction and microprobe analysis: The case of sediments from two Argentinean reservoirs

Phosphate concentration and association as revealed by sequential extraction and microprobe analysis: The case of sediments from two Argentinean reservoirs

Effect of an impoundment on nutrient dynamics in the Kihansi River, Tanzania

Synchronous Cycle of Available Phosphorus, Iron, and Sulfur in the Sediment of Lancang River Reservoirs

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