Coprecipitation of phosphate with calcite in the presence of photosynthesizing green algae

Hartley, A; House, William A.; Callow, Maureen E.; Leadbeater, B. S. C.

doi:10.1016/s0043-1354(97)00103-6

Cited by 92 publications

(56 citation statements)

References 36 publications

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“…2012). When the photosynthesis of submerged macrophytes is strong, precipitation is obvious in the water (Dittrich and Koschel 2002;House 2003;Hartley et al 1997). However, little is known about the micromorphology and structure of white precipitates on the surface of P. crispus leaves.…”

Section: Resultsmentioning

confidence: 99%

Occurrence and characterization of CaCO3-P coprecipitation on the leaf surface of Potamogeton crispus in water

Liu

Guo

Yuan

et al. 2016

Environ Sci Pollut Res

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In this paper, the characterization of CaCO 3 -P coprecipitation on the leaf surface of Potamogeton crispus at various temperatures in pot experiments was investigated. White precipitates occurred on the leaf surfaces during the P. crispus growth period, and the chemical analysis demonstrates that the white precipitates contain Ca and P. The primary constituent of the white precipitates on the leaf of P. crispus was octacalcium phosphate (OCP) and hydroxyapatite. XRD characterization showed that the precipitates mostly consisted of crystals formed by calcium carbonate and hydroxyapatite, and the high calcium/phosphorus ratio indicated that the white coprecipitates were CaCO 3 -P. The scanning electron microscopy (SEM) and energy-dispersive X-ray spectrometry (EDX) results confirmed that the precipitates on the surface of P. crispus leaves were carbonate-containing hydroxylapatite. In addition, no significant differences was observed in the structure of CaCO 3 -P coprecipitation between room temperature and consistent temperature treatments, which means that a little change in the temperature cannot change the process of Ca-P coprecipitation. Finally, coprecipitation of CaCO 3 -P on the leaf surface of P. crispus was proposed based on the morphology and structure analysis of CaCO 3 -P coprecipitation.

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Section: Resultsmentioning

confidence: 99%

Occurrence and characterization of CaCO3-P coprecipitation on the leaf surface of Potamogeton crispus in water

Liu

Guo

Yuan

et al. 2016

Environ Sci Pollut Res

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“…2 In order to prevent this problem, various techniques have been reported, such as the addition of organic phosphorus acid or ethylenediaminetetraacetic acid, a pH adjustment and ultrasonic irradiation. [3][4][5][6] Therefore, evaluating the effectiveness of the present techniques concerning scale formation is important, especially since there is only limited research that has been conducted.…”

Section: Introductionmentioning

confidence: 99%

Fundamental Study on the Development of Fiber Optic Sensor for Real-time Sensing of CaCO3 Scale Formation in Geothermal Water

et al. 2015

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“…The formation of suspended, silt and clay-sized solid particles affects the optical properties of the water, limiting light availability for photosynthesis, and influences the metabolism of filtering organisms such as mussels and some zooplankton species (G. -Tóth 1992). Carbonate minerals also exert some control over the availability of nutrients, including phosphorous (Herodek and Istvánovics 1986), through co-precipitation or surface adsorption (Istvánovics et al 1989;Hartley et al 1997), and the sediment is an important source of nitrogen as well (Présing et al 2001). Thus, the mineralogical character, such as grain size, composition and structure of the carbonate minerals is of interest for an assessment of their ecological impact.…”

Section: Introductionmentioning

confidence: 99%

Distribution and composition of Mg-calcite and dolomite in the water and sediments of Lake Balaton

Tompa

Nyírő-Kósa

Rostási

et al. 2014

Central European Geology

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Lake Balaton is a large and shallow lake that is of great economic and cultural importance in landlocked Hungary. Even though the lake has been studied extensively in the last century from a large number of scientific aspects, the mineralogy of its sediments has not been fully explored. The mud at the bottom of the lake consists mostly of silt-sized grains of carbonate minerals with compositions between those of calcite (CaCO 3 ) and dolomite CaMg (CO 3 ) 2 . In order to understand the processes of carbonate precipitation and the influence of water budget fluctuations on the mineralogical character of the sediment, we used X-ray powder diffraction to analyze the changes of cell parameters of carbonate minerals in the upper half meter of the sediment. The major carbonate phase is Mg-calcite that shows a distinct reduction in cell parameters from west to east, reflecting an increase of its Mg-content, in parallel with a gradient of dissolved Mg/Ca ratio in the water. Intriguingly, dolomite, the other widespread carbonate phase in the sediment, also shows a change in cell parameters from west to east, with the deviations from values of stoichiometric dolomite being largest in the Eastern Basin of the lake. The similar pattern of cell parameter changes of Mg-calcite and dolomite suggests that ordered dolomite with slightly anomalous, Ca-rich composition also forms in the lake, probably by direct precipitation from the water. In contrast, protodolomite forms within the sediment through diagenetic processes. Based on our X-ray powder diffraction measurements, we propose a model of carbonate mineral formation and transformation in Lake Balaton. Since the Mg/Ca ratio of the water appears to be the major factor in controlling the compositions of carbonate minerals, and this ratio in turn is governed by the amount of water supply, the properties of the precipitating carbonate minerals are affected by the actual level of the lake water.

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Coprecipitation of phosphate with calcite in the presence of photosynthesizing green algae

Cited by 92 publications

References 36 publications

Occurrence and characterization of CaCO3-P coprecipitation on the leaf surface of Potamogeton crispus in water

Occurrence and characterization of CaCO3-P coprecipitation on the leaf surface of Potamogeton crispus in water

Fundamental Study on the Development of Fiber Optic Sensor for Real-time Sensing of CaCO3 Scale Formation in Geothermal Water

Distribution and composition of Mg-calcite and dolomite in the water and sediments of Lake Balaton

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