(PDF) Characterisationof Acidic Pumice and Determination ...
Abstract and Figures. In this study some characterization tests of acidic pumice were performed using various techniques such as Mercury Intrusion Porosimetry (MIP), Scanning Electron Microscope ...
Green and Sustainable Pathways for Wastewater Purification
Utilizing rainwater is an easy and effective way to conserve water supplies and reduce the amount of freshwater use. Other than this, gray water (all nontoilet, domestic wastewater) can be a good water resource during times of drought and water restrictions . However, its reuse can bring health and environmental risks.
Drinking water contamination and treatment techniques ...
Water is of fundamental importance for life on earth. The synthesis and structure of cell constituents and transport of nutrients into the cells as well as body metabolism depend on water. The contaminations present in water disturb the spontaneity of the mechanism and result in long/short-term diseases. The probable contaminations and their possible routes are discussed in the present review ...
Investigating the prospects of bacterial biosurfactants ...
The surfactant adsorption relies upon the kind of surfactant (ionic, non-ionic, polymeric, and so on.) and the thickness of the adsorbed layer [83, 84]. The research has inspected that several biosurfactants can be used as stabiliser and modifier in the synthesis of metallic nanoparticles.
(PDF) Stability analysis of Al 2 O 3 /water nanofluids
This paper presents the stability analysis of Al. 2. O. 3. /water nano fl uid. The stability is investigated with the help of zeta potential and. visual inspection methods. The …
Electrorheological properties of pumice/silicone oil ...
12%Prior to suspension preparation, pumice was treated with 1 M HCl(aq), then washed with distilled water, and pumice particles and silicone oil were dried in a vacuum oven for 24 h at 150 °C and 4 h at 110 °C, respectively. Different volume fractions (5, 10, 15, 20, 25 %, m/m) were prepared with silicone oil.
Synthesis of ZrO2 nanoparticles on pumice and tuff for ...
The ZrO 2-pumice and ZrO 2-tuff nanocomposites were synthesized by a modified sol–gel procedure from Zr(OC 3 H 7) 4 precursors. The decoration of the ZrO 2 nanoparticles (NPs) on pumice was performed as follows. The pumice powder (1 g) was dispersed into ethanol (40 ml) by sonication for 15 min before adding Zr(OC 3 H 7) 4 (8 ml); after vigorous stirring within 1 h at room …
Ordering Control of Self-Assembled Colloidal Crystals
study, the added surfactants contribute to the concentration of counterions in the suspension and limit the range of ionic strength that can be reached. Excess amount of the surfactant is also added to ensure the stability of the monomer-water suspension. This is extremely difficult to remove in the final colloid suspension and typically
Journal of Chemical and Pharmaceutical Sciences ISSN: 0974 ...
wt. % of unmodified pumice and chemically modified pumice was dispersed with PVA in water, it was then stirred for 24 h at room temperature. Finally this suspension was then treated in ultrasonicator bath for 20 minutes. The mixtures were poured into petri dishes and dried at 60 0C in an oven for three days. The films were peeled from the
Drug Solubility: Importance and Enhancement Techniques
Solubility, the phenomenon of dissolution of solute in solvent to give a homogenous system, is one of the important parameters to achieve desired concentration of drug in systemic circulation for desired (anticipated) pharmacological response. Low aqueous solubility is the major problem encountered with formulation development of new chemical entities as well as for the generic …
Electrorheological properties of pumice/silicone oil ...
Pumice particles-based electrorheological (ER) suspensions were prepared in silicone oil and its ER behavior was investigated as a function of shear rate, electric field strength, concentration and temperature. Sedimentation stabilities of suspensions were determined. ER activity of all the suspensions was observed to increase with increasing electric field strength, concentration and ...
The Synthesis and Characterization of Low-Cost Mesoporous ...
Pumice is a cheap and abundant vesicular rock of volcanic origin, formed by the combination of SiO 2 and Al 2 O 3 at variable proportions. It can be found in many regions of the world and has been used as a raw material in several fields, such as an adsorbent in environmental applications [], an additive in the cement industry [], a low-cost reinforced filler and filter materials [].
Drug Solubility: Importance and Enhancement Techniques
1. Introduction. Solubility is the property of a solid, liquid, or gaseous chemical substance called solute to dissolve in a solid, liquid, or gaseous solvent to form a homogeneous solution of the solute in the solvent. The solubility of a substance fundamentally depends on the solvent used as well as on temperature and pressure.
US10472552B2 - Spacer fluids for cementing well bores ...
US10472552B2 US15/671,907 US201715671907A US10472552B2 US 10472552 B2 US10472552 B2 US 10472552B2 US 201715671907 A US201715671907 A US 201715671907A US 10472552 B2 US10472552 B2 US 10472552B2 Authority US United States Prior art keywords fluid fluids well pumice weighting agents Prior art date Legal status (The legal status is an assumption and is not …
Simple methods for immobilizing titania into pumice for ...
Simple methods for immobilizing titania into pumice were applied, where the products had been used for the application of photodegrading phenol waste. There were two simple methods, which were used separately: solvent evaporation and dip coating. Based on titania sol stability test, it was observed that acid condition would be favourable for immobilizing titania unto pumice, and …
(PDF) The Effect of Surfactants on the Stability of TiO2 ...
stability and effect of charges (ions) on the TiO 2 dispersion and the suspension stability behavior. The addition of surfactant produced more dispersed and stable TiO 2 in aqueous suspension.
(PDF) Application of colloidal gas aphrons for pollution ...
Optimization of pulp fibre removal by flotation using colloidal gas aphrons generated from a natural surfactant. By Soumyadeep Mukhopadhyay. Rheology and convective heat transfer of colloidal gas aphrons in horizontal mini-channels. By Gopinath Warrier.
The surfactants effect on the heat transfer enhancement ...
The effect of adding two types of surfactants (SDS and PVP) on the stability and thermal conductivity with different mass fractions to the Al 2 O 3 /de-ionized water nanofluids of various volume fractions was studied by Xia and co-workers . The surfactants worked on more nanoparticles dispersing in the base fluid and improved the steadiness of ...
Enhanced dispersion and electronic performance of single ...
A 10 mL water-urea solution ... and confirm the link between suspension stability and surface treatment. ... but significantly higher sheet resistance. Since an identified disadvantage to utilizing surfactants to disperse SWCNTs for thin film applications is the introduction of an insulating layer, the higher observed resistance values (Tween ...
Effects of Electrolytes on the Electrokinetic Properties ...
The pH profiles of pumice/water systems at different pH values were obtained to determine the stability of suspension pH. The results showed that the zeta potential values of pumice in water did ...
Utilizing Nanofluid to Enhance Thermosyphon Heat Pipe ...
This is a study on the enhancement of the thermal performance of a thermosyphon heat pipe (THP) using the Al 2 O 3 nanoparticle in a mixture of water and Triton X-100 (TX-100) surfactant. The effects of nanoparticle concentration, surfactant concentration, input power, inclination angle, and filling ratio on the thermal efficiency of THP is evaluated experimentally.
Cleaning Compositions Or Processes Of Preparing (e.g ...
Abstract: A cleaning composition is provided including an alkalinity source, builder, surfactant, water, a reducing agent and amylase in the ratio of from about 1:1 to about 1:3 wherein the total amount of amylase in the composition is equal to or less than about 1.0 weight percent; and wherein the composition is substantially free of polyols ...
Rheological measurements of Na-bentonite and sepiolite ...
The first addition of cationic surfactant molecules into the sepiolite–water suspensions causes an increase from 3.112 to 3.386 mPa s in the η pl values of the suspension due to the binding of positively charged surfactant molecules onto the negatively charged sepiolite particles via mainly electrostatic interactions.
(PDF) Electrorheological properties of pumice/silicone oil ...
Abstract Pumice particles ... ratio of the pumice suspension vs ... for the ER system with a 20 wt.% particle suspension. In addition, a water content of ca. 6 wt.% in the MCM-41 particles was ...
Materials | Free Full-Text | A Review on Adsorption of ...
Pumice is a light, porous, volcanic stone with a large surface area. It is easily and cheaply found in nature or some kinds of waste. Pumice is composed of highly microvesicular glass pyroclastic with very thin, translucent bubble walls of extrusive igneous rock. Pumice has an average porosity of 90%, and initially floats on water.
Capillary Foams: Stabilization and Functionalization of ...
For the surfactant-NPs composites, the influences of the property of the foamed suspension and the bubble-stabilizing interface, on the quality of the wet and solid foams, is still elusive.
Stable Aqueous Suspension and Self-Assembly of Graphite ...
Exfoliated graphite nanoplatelets (xGnPs) with an average thickness of 1–10 nm present an inexpensive alternative to carbon nanotubes in many applications. In this paper, stable aqueous suspension of xGnP was achieved by noncovalent functionalization of xGnP with polyelectrolytes. The surfactants and polyelectrolytes were compared with respect to their ability to suspend graphite nanoplatelets.
Wastewater treatment and reclamation: A review of pulp and ...
The rinse water is directed backwards through the series of washers until the most contaminated rinse water enters the chemical recovery system. In modern pulp and paper making facilities it is still common to employ screen cylinders (i.e. "deckers") which rotate slowly while partially submerged in a vat filled with pulp suspension (Fig. 6 ...
Liquid suspension of particles of a metal belonging to the ...
The finished suspension will have a maximum of stability if the weight ratio PEGDE to chloroplatinic acid is higher than 20. Ternary diagrams of the type illustrated on the drawing can be produced for each combination of hydrocarbon, surfactant, water, and metal salt.
US20020019318A1 - Suspensions of water soluble polymers in ...
Liquid water soluble polymer suspensions in non-aqueous solvents are extremely stable over long periods of time with minimum separation of the solvent and no hard packing of the dispersed water soluble polymer. The suspensions enable a user to rapidly add the suspension to water, being mixed at low speeds, without the formation of lumps or fisheyes and without generating fugitive dust in the ...
Temperature Stable Cloquintocet-Mexyl Aqueous Compositions ...
Temperature stable aqueous suspension compositions containing hydrated cloquintocet-mexyl (CQCM) and methods for their preparation are described herein. The compositions include cloquintocet-mexyl, a surfactant, and water. The surfactant includes a tallowamine alkoxylate, a cocoamine alkoxylate, or a combination thereof.
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