Obtaining of silica nanopowders from natural hydrothermal solutions

Потапов, В. В.; Trutnev, N. S.; Gorbach, V.A.; Generalov, M. B.; Romanova, I. A.

doi:10.1134/s0040579510051276

Cited by 2 publications

(2 citation statements)

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“…In this paper, two samples of aqueous dispersions SiO 2 obtained by different methods [7,8] are tested. The density of the Simple 1 is ρ 1 = 1095 g/dm 3 , the concentration of SiO 2 is С 1 = 170 g/dm 3 .…”

Section: Key Engineering Materials Vol 744mentioning

confidence: 99%

“…Unique technology of nanosized silica production from a natural thermal solutions (Kamchatka Peninsula) was developed recently both in the form of a sol and powder [6,7]. Preliminary study demonstrated the high efficiency of using this product as an additive in concrete [8][9][10], but it is necessary to provide a more detailed study of the properties of NS and their technological characteristics for industrial applications.…”

Section: Introductionmentioning

confidence: 99%

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Influence of Hydrothermal Nanosilica on Mechanical Properties of Plain Concrete

Makarova

Потапов

Kozin

et al. 2017

KEM

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The production of nanosilica (NS) from natural hydrothermal solution is an alternative to the existing commercial fabrication methods because of the lower energy requirements. Here we provide a detailed characterization of the main properties of NS samples (e.g., shape and particle size) by different methods. The produced NS has a specific surface area between 60 m2/g and 500 m2/g and nanoparticles sizes between 5 nm and 135 nm. The aim of the present work is to evaluate the effect of the natural NS on compressive strengths of plain concrete. For this purpose, eight series of concrete specimens with different volume fraction of NS are studied. Experimental results reveal that with adding of NS, the concrete strength can be increased by 35% after 28 days, whereas strength characteristics of such concrete can be increased up to 84% after 3 days, and 93% after 7 days compared with a control concrete without NS.

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Section: Key Engineering Materials Vol 744mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Influence of Hydrothermal Nanosilica on Mechanical Properties of Plain Concrete

Makarova

Потапов

Kozin

et al. 2017

KEM

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Possibility of using thermal water from the Nizhne-Paratunskiye springs of Kamchatka to create pharmaceutical and cosmeceutical compositions

Lokarev

Степанова

Ogay

et al. 2020

Farmacevticheskoe Delo I Tehnologija Lekarstv (Pharmacy and Pharmaceutical Technology)

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The purpose was to determine content of the main active components — macro- and microelements — in thermal water, in the intermediate product (concentrate) and in the dosage form (spray). Determining the saturation of the dosage form with active components was the purpose as well. Materials and methods. Thermal water from the Nizhne-Paratunskiye springs of Kamchatka, concentrate from this water, composition with a concentrate of thermal water in the form of spray were used. Determination of the content of calcium and magnesium ions was carried out by titrimetric method on the basis of forming a complex compound with Trilon B. Validation of the used methods was carried out. Its repeatability was evaluated within one day to determine the precision of the technique. The intra- and inter-assay precision of the validated method was also evaluated. Solutions containing calcium and magnesium ions in concentrations of 80–120 % from the declared amount were prepared to determine linearity of the methods. Results. The content of magnesium and calcium ions in the raw material (3.63 and 284.41 mg/l, respectively), the intermediate product — concentrate (35.38 and 2723.00 mg/l) and the finished form — spray (11 and 778 mg/l) was determined. Conclusion. As a result of studies based on the determination of the content of macro- and microelements in the spray, concentrate, dosage form, it was found that it is possible to achieve an increase in the content of the trace elements in thermal water, thanks to its 10-fold concentration, which will reduce the cost of transportation. Using the concentrate it is possible to achieve the required salt concentration in the finished product. The developed spray has a complex of auxiliary substances that provide the required consistency of the composition, easily releases hydrothermal water, is chemically indifferent, compatible with salts, absorbs liquid well, is easily removed from the application site, leaves no traces.

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Obtaining of silica nanopowders from natural hydrothermal solutions

Cited by 2 publications

References 1 publication

Influence of Hydrothermal Nanosilica on Mechanical Properties of Plain Concrete

Influence of Hydrothermal Nanosilica on Mechanical Properties of Plain Concrete

Possibility of using thermal water from the Nizhne-Paratunskiye springs of Kamchatka to create pharmaceutical and cosmeceutical compositions

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