scholarly journals Effect of Dodecane-Oleic Acid Collector Mixture on the Evolution of Wetting Film between Air Bubble and Low-Rank Coal

Minerals ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 58
Author(s):  
Yinfei Liao ◽  
Xingwei Song ◽  
Maoyan An ◽  
Zhe Yang ◽  
Xiaodong Hao ◽  
...  
Keyword(s):  
Oleic Acid ◽  
Zeta Potential ◽  
Force Constant ◽  
Induction Time ◽  
Low Rank ◽  
Potential Measurement ◽  
Hydrophobic Force ◽  
Drainage Rate ◽  
Coal Particles ◽  
Wetting Film

The wetting film evolution process is essential for flotation, especially in bubble–particle attachment. A mixed collector has been proved effective in promoting flotation. In this paper, the effect of a mixed collector (MC) composed by n-dodecane (D) and oleic acid (OA) on wetting film evolution was investigated using the extended Derjagin–Landau–Verwey–Overbeek (EDLVO) theory, the Stefan–Reynolds model, induction time, and zeta potential measurement. The hydrophobic force constant between bubble and coal treated by different collectors was analyzed. The results showed that MC was superior in reducing the induction time and increasing the zeta potential. When bubbles interacted with coal treated by MC, they had relatively low interaction energy, high critical film thickness, and high drainage rate. The order of hydrophobic force constant was no reagent < D < OA < MC. It indicated that the hydrophobic interaction between bubbles and coal particles treated by MC was the strongest because of the synergistic effect of D and OA.

Investigation of the induction time of low-rank coal particles on rising bubble surfaces

2017 ◽  
Vol 40 (9) ◽  
pp. 640-654 ◽  
Author(s):  
Shiwei Wang ◽  
Jifeng Guo ◽  
Longfei Tang ◽  
Huan He ◽  
Xiuxiang Tao
Keyword(s):  
Induction Time ◽  
Low Rank ◽  
Low Rank Coal ◽  
Rising Bubble ◽  
Coal Particles

How to use alum with cationic dispersed rosin size

TAPPI Journal ◽  
2016 ◽  
Vol 15 (5) ◽  
pp. 331-335 ◽  
Author(s):  
LEBO XU ◽  
JEREMY MYERS ◽  
PETER HART
Keyword(s):  
Zeta Potential ◽  
Colloidal Particles ◽  
Streaming Potential ◽  
Excessive Amount ◽  
Paper Machine ◽  
Optimum Amount ◽  
Potential Measurement ◽  
Streaming Current ◽  
Wide Range ◽  
Laboratory Results

Retention of cationic dispersed rosin size was studied via turbidity measurements on stock filtrate with different alum and dispersed rosin size dosages. Stock charge characteristics were analyzed using both an analysis of charge demand determined via a streaming current detector and an evaluation of zeta potential of the fibers by streaming potential measurement. The results indicated that an optimum amount of alum existed such that good sizing retention was maintained throughout a wide range of dispersed rosin size dosages. However, when an excessive amount of alum was used and fines and colloidal particles were transitioned from anionic to cationic, the cationic size retention was reduced. Laboratory results were confirmed with a paper machine trial. All data suggested that a stock charge study was necessary to identify optimal alum dosage for a cationic dispersed rosin sizing program.

Spreading behavior of dodecane-oleic acid collector mixture in low-rank coal flotation

Fuel ◽  
2022 ◽  
Vol 308 ◽  
pp. 122071
Author(s):  
Yinfei Liao ◽  
Zhe Yang ◽  
Maoyan An ◽  
Yijun Cao ◽  
Xiaodong Hao ◽  
...  
Keyword(s):  
Oleic Acid ◽  
Low Rank ◽  
Low Rank Coal ◽  
Coal Flotation ◽  
Spreading Behavior

Attachment interactions between low-rank coal particles and air/oily bubbles in a microflotation cell

2018 ◽  
Vol 41 (10) ◽  
pp. 1209-1215
Author(s):  
You Zhou ◽  
Boris Albijanic ◽  
Shiwei Wang ◽  
Guosheng Li ◽  
Xiangnan Zhu
Keyword(s):  
Low Rank ◽  
Low Rank Coal ◽  
Coal Particles

scholarly journals Photodegradation of Biohazardous Dye Brilliant Blue R Using Organometallic Silver Nanoparticles Synthesized through a Green Chemistry Method

Biology ◽  
2021 ◽  
Vol 10 (8) ◽  
pp. 784
Author(s):  
Agnieszka Sidorowicz ◽  
Tomasz Szymański ◽  
Jakub Dalibor Rybka
Keyword(s):  
Zeta Potential ◽  
Green Chemistry ◽  
Organic Pollutant ◽  
Active Agent ◽  
Xrd Analysis ◽  
Sem Analysis ◽  
Brilliant Blue ◽  
Silver Nanostructures ◽  
Potential Measurement ◽  
Chemistry Method

Nowadays, nanostructures having tremendous chemical and physical properties are gaining attention in the biomedical industry. However, when they are prepared through classical methods (physical and chemical), they are often non-biocompatible and toxic. Considering the mentioned factors, in this research, organometallic silver nanostructures (OMAgNs) have been prepared by the green chemistry method using the acetone, methanol, and methanol-hexane-based extracts of the medicinally important plant Cichorium intybus. Secondary metabolites from C. intybus can be used as an alternative to synthetic reagents at an industrial scale to manufacture biosafe and economical nanostructures with enhanced physicochemical parameters. Prepared nanostructures were characterized using SEM, XRD, FTIR, TGA, UV, and zeta potential measurement. SEM analysis revealed different shapes of OMAgNs, prepared with various extracts. XRD analysis showed the crystallinity of the nanostructures. FTIR spectroscopy helped to identify groups of compounds present in the extracts and used for the OMAgNs synthesis. Out of the three tested OMAgNs, those prepared with methanol extract were selected due to the highest obtained yield and stability (highest negative zeta potential) and were tested as a cost-efficient and active agent to photodegrade organic pollutant, Brilliant Blue R, using energy from sunlight. A decrease in UV-VIS absorbance confirmed the rapid degradation of the dye.

scholarly journals Ex-vivo Ex-Vivo Absorption Study of a Novel Dabigatran Etexilate Loaded Nanostructured Lipid Carrier Using Non-Everted Intestinal Sac Model

2019 ◽  
Vol 28 (2) ◽  
pp. 37-45
Author(s):  
Haithem N Abed ◽  
Ahmed A. Hussein
Keyword(s):  
Particle Size ◽  
Oleic Acid ◽  
Zeta Potential ◽  
Oral Absorption ◽  
Ex Vivo ◽  
Dabigatran Etexilate ◽  
Entrapment Efficiency ◽  
Nanostructured Lipid Carrier ◽  
Loading Capacity ◽  
Intestinal Permeation

Abstract The purpose of our study was to develop Dabigatran Etexilate loaded nanostructured lipid carriers (DE-NLCs) using Glyceryl monostearate and Oleic acid as lipid matrix, and to estimate the potential of the developed delivery system to improve oral absorption of low bioavailability drug, different Oleic acid ratios effect on particle size, zeta potential, entrapment efficiency and loading capacity were studied, the optimized DE-NLCs shows a particle size within the nanorange, the zeta potential (ZP) was 33.81±0.73mV with drug entrapment efficiency (EE%) of  92.42±2.31% and a loading capacity (DL%) of 7.69±0.17%. about 92% of drug was released in 24hr in a controlled manner, the ex-vivo intestinal permeation study using the non-everted sac model shows four folds increment in the permeation of DE-NLCs compared to dabigatran etexilate suspension (DE-S).

Screening Friction Reducer Performance Using Zeta Potential

2021 ◽  
Author(s):  
Philip Ayazi ◽  
Nathan Peregoy ◽  
Gabriel Monreal ◽  
Frank Zamora
Keyword(s):  
Zeta Potential ◽  
General Purpose ◽  
Polymer Chains ◽  
Source Water ◽  
Flow Loop ◽  
Screening Process ◽  
Potential Measurement ◽  
Zeta Potential Measurement ◽  
Industry Standard ◽  
Shale Reservoirs

Abstract Friction reducers (FRs) are essential additives for water used in hydraulic fracturing treatments for shale reservoirs. These polymers swell and unfurl in the frac water so that polymer chains align along the direction of flow to inhibit turbulence thereby reducing friction at high flow rates. Source water ion content, application pH, and compatibility with the formation are key drivers in deciding which FR chemistries are fit-for-purpose for the operation, balancing desired fluid performance with treatment economics. This investigation explores zeta potential measurement as a novel and meaningful analytical metric to correlate chemical and rheological properties of FRs in a range of source water qualities with their friction reducing performance. The approach of this investigation involves measuring zeta potential of frac fluids formulated using anionic or cationic FRs in waters with varying ionic activity over a range of FR concentrations and pH. The evaluation encompasses a variety of FRs spanning general purpose materials to more sophisticated additives designed to function in fluids with higher concentrations of salt. Dry FR materials as well as corresponding slurry or emulsion forms of the additives are tested. Monovalent and divalent salts and mixtures thereof are used in brine formulations. FR characterization is performed including rheological sweeps, viscoelasticity measurements, and flow loop tests. Results from this study support the conclusion that zeta potential measurement can be used during the FR screening process as a viable supplement to industry standard tests for assessing FR performance in brine.

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