Injectable silica–permanganate gel as a slow-release MnO4− source for groundwater remediation: rheological properties and release dynamics

2016 ◽  
Vol 18 (2) ◽  
pp. 256-264 ◽  
Author(s):  
S. Yang ◽  
M. Oostrom ◽  
M. J. Truex ◽  
G. Li ◽  
L. Zhong
Keyword(s):  
Rheological Properties ◽  
Pore Water ◽  
Fumed Silica ◽  
Groundwater Remediation ◽  
Slow Release ◽  
Chlorinated Contaminants

A mixture of aqueous KMnO4 solution and fumed silica powders produces a gel that slowly releases a MnO4− oxidant which enhances the removal of chlorinated contaminants from pore water in aquifers.

scholarly journals Transferred Arc Production of Fumed Silica: Rheological Properties

2008 ◽  
Vol 47 (17) ◽  
pp. 6790-6795 ◽  
Author(s):  
Ramona Pristavita ◽  
Richard J. Munz ◽  
Tony Addona
Keyword(s):  
Rheological Properties ◽  
Fumed Silica ◽  
Transferred Arc

scholarly journals Rheological properties of aquaeous dispersion of styrene acrylate copolymer incorporating hollow microspheres and AEROSIL®

2018 ◽  
Vol 230 ◽  
pp. 03017 ◽  
Author(s):  
Natalia Saienko ◽  
Dmitriy Demidov ◽  
Yuri Popov ◽  
Roman Bikov ◽  
Vyacheslav Butskyi
Keyword(s):  
Rheological Properties ◽  
Fumed Silica ◽  
Structural Strength ◽  
Aqueous Dispersion ◽  
Hollow Microspheres ◽  
Rotational Viscometer ◽  
Positive Effects ◽  
Acrylate Copolymer ◽  
Degree Of Filling ◽  
High Range

The rheological properties of aquaeous dispersion of styrene acrylate copolymer incorporating hollow aluminosilicate microspheres and AEROSIL® 300 fumed silica (a high-range water reducing admixture) have been investigated using rotational viscometer. It is established that an increase in the degree of filling with hollow microspheres results in a significant increase in the viscosity of aqueous dispersion leading to the technological difficulties when coating the protected surfaces. AEROSIL® 300 can be dosed in small amounts resulting in a decrease in the structural strength and optimal viscosity of aqueous dispersion of acrylate copolymer, which allows to significantly reduce the viscosity density, while maintaining relatively low water demand and characteristics of highly filled systems, which is crucial in the technology of their application. The combination of such fillers as AEROSIL® 300 and hollow aluminosilicate microspheres in the styrene acrylate copolymer aqueous dispersion allows the combination of a number of positive effects: a reduction in the viscosity of the material during application (without dilution) by applying high shear rate and increasing viscosity (structuring) after application, and also during their storage and transportation.

scholarly journals Purification of wet process phosphoric acid by desulfurization and ammonization

2021 ◽  
pp. 24-34
Author(s):  
B.N. Karshiev ◽  
◽  
А.R. Seytnazarov ◽  
U.K. Alimov ◽  
Sh.S. Namazov ◽  
...  
Keyword(s):  
Phosphoric Acid ◽  
Rheological Properties ◽  
Slow Release ◽  
Wet Process ◽  
Slow Release Fertilizer ◽  
Trivalent Metals

We studied the processes of desulfurization of phosphoric acid obtained by wet process from washed and roasted concentrate and subsequent purification of acid from bivalent and trivalent metals and fluorine via partial ammonization (at pH of 2 to 4). Purified ammoniated slurry containing 16.96% P2O5, 8.06% N, 0.09% CaO, 0.58% MgO, 0.004% Fe2O3, 0.031% A12O3, 0.78% SO3 and 0.52% F was fabricated by the removal of precipitates at the stages of desulfurization and partial ammonization. The rheological properties of ammoniated slurry with 40% moisture were studied. When the temperature is increased from 40 to 800C, both the density and viscosity decrease from 1.395 to 1.365 g cm–3 and from 80.8 to 48.7 cP, respectively. Ammoniated suspension with pH of 5.5 and 8.5 was applied to prepare mono- and diammonium phosphates with the ratio P2O5:N of 52:14 and 48:18, respectively. The sludge obtained after desulfurization and ammonization processes can be used as a slow-release fertilizer.

Tuning magneto-rheological properties of magnetic fluid using hydrophilic fumed silica nanoparticles

Soft Matter ◽  
2021 ◽  
Author(s):  
Xiao Liu ◽  
Decai Li
Keyword(s):  
Silica Nanoparticles ◽  
Rheological Properties ◽  
Magnetic Fluid ◽  
Fumed Silica ◽  
Mass Fraction ◽  
Coarse Grained ◽  
Fumed Silica Nanoparticles ◽  
Magneto Rheological

In this paper, we study the effect of hydrophilic fumed silica nanoparticles with different mass fraction on the magneto-rheological properties of magnetic fluid, and reveal the mechanism by the coarse-grained...

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