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1. Steric-effect-induced enhancement of electrokinetic energy conversion efficiency in curved nanochannels with rectangular sections at high zeta potentials

Author:
Liu, Yongbo; Jian, Yongjun; Yang, Chunhong
Source:
Colloids and surfaces 2020 v.591 pp. 124558
ISSN:
0927-7757
Subject:
zeta potential,   etc   ; energy conversion; geometry;     Show all 3 Subjects
Abstract:
... In this work, we investigate the electrokinetic energy conversion in curved rectangular nanochannels at high zeta potentials, intending to increase the efficiency of electrokinetic generation. As we demonstrate, the geometry effect can have an important role in the investigations of the conversion efficiency. In addition, we consider the influences of steric effect (the effect of finite ion size) ...
DOI:
10.1016/j.colsurfa.2020.124558

2. Dispersion performances and adsorption behavior of novel block polycarboxylate with hybrid side chains in coal-water slurry

Author:
Zhu, Junfeng; Gao, Weichun; Wang, Pei; Zhu, Ting; Li, Junguo
Source:
Colloids and surfaces 2020 v.594 pp. 124644
ISSN:
0927-7757
Subject:
zeta potential,   etc   ; adsorption; coal; dispersants; slurries; viscosity; China;     Show all 7 Subjects
Abstract:
... A serial of novel block polycarboxylate dispersants (PCDs) with hybrid side chains employing long-short composite side chains for making coal-water slurry (CWS) were synthesized and applied to a low rank coal in the north of China to make slurry. The relationship of the fine structure of side chains and properties of the CWS were investigated. The results show that the apparent viscosity, zeta pot ...
DOI:
10.1016/j.colsurfa.2020.124644

3. Surface force arising from Adsorbed graphene oxide in kaolinite suspensions

Author:
Hoor, Ying Qing; Au, Pek-Ing; Mubarak, N.M.; Khalid, Mohammad; Jagadish, Priyanka; Walvekar, Rashmi; Abdullah, E.C.
Source:
Colloids and surfaces 2020 v.592 pp. 124592
ISSN:
0927-7757
Subject:
zeta potential,   etc   ; graphene oxide; kaolin; kaolinite; pH; Malaysia;     Show all 6 Subjects
Abstract:
... The mechanism of surface force, rheological and surface charge behaviours of kaolinite and graphene oxide (GO)-kaolinite suspension under various surface chemistry condition using kaolin mined in Malaysia are not clearly defined. Therefore, these properties were determined using zeta potential-pH measurements, Mular-Roberts (MR) pH-salt addition and yield stress-pH measurements at different solid ...
DOI:
10.1016/j.colsurfa.2020.124592

4. Rapid determination of emulsion stability by rheology-based thermal loop test

Author:
Tekin, Zeynep Hazal; Avci, Esra; Karasu, Salih; Toker, Omer Said
Source:
Lebensmittel-Wissenschaft + [i.e. und] Technologie 2020 v.122 pp. 109037
ISSN:
0023-6438
Subject:
zeta potential,   etc   ; emulsions; particle size distribution; separation; xanthan gum;     Show all 5 Subjects
Abstract:
... This study aimed to determine the stability of oil-in-water emulsions using the thermal loop test as a novel method. Samples with xanthan gum concentrations of 0.1 g, 0.2 g, 0.3 g, 0.4 g or 0.5 g/100 g were subjected to 10 thermal cycles from 5 to 23 °C (low-temperature stability test) and 23–45 °C (high-temperature stability test). In the low-temperature stability test, the relative change of G* ...
DOI:
10.1016/j.lwt.2020.109037

5. The interaction among multiple charged particles induced by cations and direct force measurements by AFM

Author:
Li, Zhihang; Han, Yuexin; Gao, Peng; Wang, Hao; Liu, Jianchao
Source:
Colloids and surfaces 2020 v.589 pp. 124440
ISSN:
0927-7757
Subject:
zeta potential,   etc   ; calcium; cations; copper; magnesium; quartz; serpentine;     Show all 7 Subjects
Abstract:
... The interaction among multiple charged particles in flotation system was subjected to detailed analysis using different techniques. To limit the detrimental effect of serpentine on ascharite flotation, an innovative method was used through particles interaction. It stated that serpentine took priority to absorb on quartz surface to prevent from attaching to ascharite surface. Interaction forces am ...
DOI:
10.1016/j.colsurfa.2020.124440

6. Removal of metronidazole from aqueous media by C. vulgaris

Author:
Hena, Sufia; Gutierrez, Leo; Croué, Jean-Philippe
Source:
Journal of hazardous materials 2020 v.384 pp. 121400
ISSN:
0304-3894
Subject:
zeta potential,   etc   ; acute toxicity; adsorption; antibiotics; biomass production; inoculum; metronidazole;     Show all 7 Subjects
Abstract:
... This current study investigated the removal of metronidazole from aqueous media by C. vulgaris. Two different initial sizes of inoculum (0.05 and 0.5 g L⁻¹) were tested for a wide concentration range of metronidazole (1–50 μM). The effect of metronidazole concentrations on biomass production was studied for 20 days. The exopolymeric substances (EPS) were quantified and correlated with the removal ...
DOI:
10.1016/j.jhazmat.2019.121400

7. Chemical physics of whey protein isolate in the presence of mucin: From macromolecular interactions to functionality

Author:
Ahmad, Mehraj; Ritzoulis, Christos; Pan, Weichun; Chen, Jianshe
Source:
International journal of biological macromolecules 2020 v.143 pp. 573-581
ISSN:
0141-8130
Subject:
zeta potential,   etc   ; fluorometry; mucins; pH; separation; viscosity; whey protein isolate;     Show all 7 Subjects
Abstract:
... Oral processing, textural perception and functionality of colloidal foods are strongly influenced by the interactions between the salivary mucins and the food proteins. This work studies the physico-chemical aspects of mixtures of a typical food protein, whey protein isolate (WPI) and mucin. Phase separations result from aggregation between the two components at pH 7 and at pH 3. ζ-potential and f ...
DOI:
10.1016/j.ijbiomac.2019.12.069

8. Induction time and zeta potential study of nucleating and growing struvite crystals for phosphorus recovery improvements within fluidized bed reactors

Author:
Fromberg, Marcia; Pawlik, Marek; Mavinic, Donald S.
Source:
Powder technology 2020 v.360 pp. 715-730
ISSN:
0032-5910
Subject:
zeta potential,   etc   ; crystals; fluidized beds; magnesium ammonium phosphate; phosphorus; powders;     Show all 6 Subjects
Abstract:
... The properties of nucleating and growing struvite crystals are important aspects to pellet agglomeration and growth mechanisms in fluidized bed reactors (FBR). A new approach, using a laser to sense crystals of approximately 650 nm, was used to measure the induction time of nucleating struvite. The ability of the laser to indicate an approximate size ensured the presence of crystals in solution fo ...
DOI:
10.1016/j.powtec.2019.09.067

9. Effectiveness of the Simultaneous Application of Capillary Zone Electrophoresis and Static Light Scattering in the Study of Volcanic Ash Nano- and Submicroparticles

Author:
Dzherayan, T. G.; Ermolin, M. S.; Vanifatova, N. G.
Source:
Journal of analytical chemistry 2020 v.75 no.1 pp. 67-72
ISSN:
1061-9348
Subject:
zeta potential,   etc   ; capillary zone electrophoresis; light scattering; volcanic ash;     Show all 4 Subjects
Abstract:
... An advantage of using capillary zone electrophoresis and static light scattering is demonstrated on an example of suspensions containing nano- and submicroparticles of volcanic ash under the condition of simultaneous studies using the same aqueous suspensions. We found the dependences of the electrophoretic mobility and the zeta potential of nano- and submicroparticles on size by comparing electro ...
DOI:
10.1134/S1061934820010050

10. Measurement of the real part of the Clausius–Mossotti factor of dielectrophoresis for Brownian particles

Author:
Lo, Ying‐Jie; Lei, U
Source:
Electrophoresis 2020 v.41 no.1-2 pp. 137-147
ISSN:
0173-0835
Subject:
zeta potential,   etc   ; dielectrophoresis; electrodes; electrophoresis; equations; glass; optical traps; polystyrenes;     Show all 8 Subjects
Abstract:
... A method is proposed for measuring the real part of the Clausius–Mossotti factor (Kr) of dielectrophoresis for Brownian particles based on a solution of the Smoluchowski equation using a designed polydimethysilloxane microchannel with planar hyperbolic electrodes on its glass substrate. An approximate two‐dimensional spring‐like dielectrophoretic force is generated in the device, and the data nece ...
DOI:
10.1002/elps.201900345

11. Role of functional groups in the production of self-assembled microfibrillated cellulose hybrid frameworks and influence on separation mechanisms of dye from aqueous medium

Author:
Karim, Zoheb; Svedberg, Anna; Ayub, Shahanaz
Source:
International journal of biological macromolecules 2020 v.155 pp. 1541-1552
ISSN:
0141-8130
Subject:
zeta potential,   etc   ; adsorption; catalytic activity; cellulose microfibrils; dyes; models; moieties; peroxidase; photooxidation; titanium dioxide;     Show all 10 Subjects
Abstract:
... In this article, the role of surface ζ-potential, surface charge density of functional groups and available surface functional groups (-OH and –COO⁻) of microfibrillated cellulose (MFC) was explored in the production of self-assembled dimensional frameworks. Furthermore, 2,2,6,6-tetramethyl-1-piperidinyloxy (TEMPO) oxidation of MFC and in situ TEMPO functionalization of produced frameworks were pe ...
DOI:
10.1016/j.ijbiomac.2019.11.131

12. Valorization of waste eggshell-derived bioflocculant for harvesting T. obliquus: Process optimization, kinetic studies and recyclability of the spent medium for circular bioeconomy

Author:
Roy, Madonna; Mohanty, Kaustubha
Source:
Bioresource technology 2020 v.307 pp. 123205
ISSN:
0960-8524
Subject:
zeta potential,   etc   ; Tetradesmus; adsorption; bioeconomics; biomass; flocculation; harvesting; microalgae; pH; temperature; wastes;     Show all 11 Subjects
Abstract:
... Waste eggshell-derived bioflocculant was used for harvesting T. obliquus in a circular bioeconomy approach. It was found that 120 mg L⁻¹ bioflocculant can flocculate 98.62 ± 0.43% of T. obliquus cells within 25 min at optimal pH 4.0 and temperature 35 °C. The influence of bioflocculant concentration, pH and temperature on zeta potential was evaluated to understand the flocculation mechanism. Micro ...
DOI:
10.1016/j.biortech.2020.123205

13. Flotation separation of pyrite from arsenopyrite using sodium carbonate and sodium humate as depressants

Author:
Liu, Ruizeng; Li, Jialei; Wang, Yunwei; Liu, Dianwen
Source:
Colloids and surfaces 2020 v.595 pp. 124669
ISSN:
0927-7757
Subject:
zeta potential,   etc   ; adsorption; arsenic; copper sulfate; electrochemistry; pH; pyrite; sodium carbonate; sodium humate; voltammetry;     Show all 10 Subjects
Abstract:
... Arsenic is hazardous to the environment, and needs special precautions in smelting operations. The separation of pyrite and arsenopyrite is therefore required; however, the process is difficult. The present work employed the combination of sodium carbonate (Na₂CO₃) and sodium humate (HA) as arsenopyrite depressants. In this regard, flotation tests, zeta potential measurements, adsorption tests and ...
DOI:
10.1016/j.colsurfa.2020.124669

14. The influence of extracellular polymeric substances on the coagulation process of cyanobacteria

Author:
Sun, Feng; Zhang, Hanyuan; Qian, Aijuan; Yu, Hongfei; Xu, Chenhui; Pan, Rong; Shi, Yijing
Source:
The Science of the total environment 2020 v.720 pp. 137573
ISSN:
0048-9697
Subject:
zeta potential,   etc   ; Cyanobacteria; adsorption; coagulants; coagulation; drinking water; flocculation; hydrophobicity; microcystins; polymers; surface area;     Show all 11 Subjects
Abstract:
... The hydrophobicity and flocculation properties of cyanobacterial cells are closely related to their extracellular polymeric substances (EPS). During the treatment of drinking water, the coagulation and removal of EPS-wrapped cyanobacterial particles from natural water sources is very difficult. In this work, a series of surface characteristics of cyanobacterial cells with different EPS fractions w ...
DOI:
10.1016/j.scitotenv.2020.137573

15. Tailor-made ternary nanopolyplexes of thiolated trimethylated chitosan with pDNA and folate conjugated cis-aconitic amide-polyethylenimine for efficient gene delivery

Author:
Liu, Qing; Jin, Zhu; Huang, Wei; Sheng, Yuanyuan; Wang, Zhongmin; Guo, Shengrong
Source:
International journal of biological macromolecules 2020 v.152 pp. 948-956
ISSN:
0141-8130
Subject:
zeta potential,   etc   ; chitosan; disulfides; electrostatic interactions; folic acid; genes; glutathione; human cell lines; neoplasms; pH; transfection;     Show all 11 Subjects
Abstract:
... To overcome the different extra-/intracellular barriers in gene delivery, tumor-targeted and pH/redox-responsive ternary polyplexes with charge-conversional properties were prepared through a modular self-assembly strategy. Firstly, the thiolated trimethylated chitosan (TMC-SH) was synthesized to crosslink and condense pDNA through electrostatic interaction and disulfide formation, which obtained ...
DOI:
10.1016/j.ijbiomac.2019.10.212

16. Sulfidation enhances stability and mobility of carboxymethyl cellulose stabilized nanoscale zero-valent iron in saturated porous media

Author:
Gong, Li; Shi, Shasha; Lv, Neng; Xu, Wenqiang; Ye, Ziwei; Gao, Bin; O'Carroll, Denis M.; He, Feng
Source:
The Science of the total environment 2020 v.718 pp. 137427
ISSN:
0048-9697
Subject:
zeta potential,   etc   ; adsorption; aluminum; carboxymethylcellulose; filtration; hydrodynamics; iron; longevity; models; porous media; potassium; sodium; sulfides;     Show all 13 Subjects
Abstract:
... Sulfidation can enhance the reactivity and longevity of nanoscale zero-valent iron (nZVI), but little is known about its effect on the fate and transport of nZVI in saturated porous media. This work compared the stability and mobility of carboxymethyl cellulose (CMC) stabilized nZVI (CMC-nZVI) and sulfidated nZVI (CMC-S-nZVI) particles in saturated porous media. After sulfidation, the hydrodynamic ...
DOI:
10.1016/j.scitotenv.2020.137427

17. Characteristics and rheological behavior of Pickering emulsions stabilized by tea water-insoluble protein nanoparticles via high-pressure homogenization

Author:
Ren, Zhongyang; Chen, Zhongzheng; Zhang, Yuanyuan; Lin, Xiaorong; Li, Bin
Source:
International journal of biological macromolecules 2020 v.151 pp. 247-256
ISSN:
0141-8130
Subject:
zeta potential,   etc   ; byproducts; creaming; droplet size; emulsions; food industry; homogenization; nanoparticles; tea; viscoelasticity;     Show all 10 Subjects
Abstract:
... Food-grade Pickering emulsions have attracted lots of researchers' attention. As one type of food-grade particles, tea water-insoluble protein nanoparticles (TWIPN) from tea residues were utilized to prepare Pickering emulsions at an oil-water ratio of 6: 4 (v/v) via high-pressure homogenization (HPH). Characteristics and rheological behavior of TWIPN-stabilized Pickering emulsions (TWIPNPE) were ...
DOI:
10.1016/j.ijbiomac.2020.02.090

18. Flocculation behavior and mechanisms of block copolymer architectures on silica microparticle and Chlorella vulgaris systems

Author:
Morrissey, Kathryn L.; Fairbanks, Benjamin D.; Bull, David S.; Stoykovich, Mark P.; Bowman, Christopher N.
Source:
Journal of colloid and interface science 2020 v.567 pp. 316-327
ISSN:
0021-9797
Subject:
zeta potential,   etc   ; Chlorella vulgaris; composite polymers; electrolytes; flocculants; flocculation; microparticles; molecular weight; silica;     Show all 9 Subjects
Abstract:
... Flocculation performance using polyelectrolytes is influenced by critical design parameters including molecular weight, amount and sign of the ionic charge, and polymer architecture. It is expected that systematic variation of these characteristics will impact not only flocculation efficiency (FE) achieved but that charge density and architecture, specifically, can alter the flocculation mechanism ...
DOI:
10.1016/j.jcis.2020.02.001

19. Improvement of the physical stability of oil-in-water nanoemulsions elaborated with Sacha inchi oil employing ultra-high-pressure homogenization

Author:
Rave, Maria C.; Echeverri, Juan D.; Salamanca, Constain H.
Source:
Journal of food engineering 2020 v.273 pp. 109801
ISSN:
0260-8774
Subject:
zeta potential,   etc   ; creaming; droplet size; droplets; emulsifiers; homogenization; nanoemulsions; oils; preservatives; surfactants; thermal stability; viscosity;     Show all 12 Subjects
Abstract:
... This study focused on assessing the physical stabilization of several oil-in-water nanoemulsions obtained by Ultra-High-Pressure Homogenization (UHPH). For this, several formulations were developed using Sacha inchi oil (~9.3% w/w), ultra-pure water, preservatives (0.44% w/w) and several emulsifier mixtures at 2% w/w, which were combined in different proportions to provide surfactant blends with H ...
DOI:
10.1016/j.jfoodeng.2019.109801

20. Cotransport and deposition of biochar with different sized-plastic particles in saturated porous media

Author:
Tong, Meiping; Li, Tengfei; Li, Meng; He, Lei; Ma, Zhiyao
Source:
The Science of the total environment 2020 v.713 pp. 136387
ISSN:
0048-9697
Subject:
zeta potential,   etc   ; biochar; ionic strength; nanoplastics; pH; pollution; porous media; quartz; remediation; sand; sodium chloride; soil;     Show all 12 Subjects
Abstract:
... Plastic particles recently are reported to be ubiquitous in natural environments, while biochar is widely employed as an amendment into natural environments e.g. soil for pollution remediation. It is highly likely their transport behaviors in porous media would be altered due to interaction with each other. In this study, the cotransport and deposition behaviors of biochar and plastic particles (0 ...
DOI:
10.1016/j.scitotenv.2019.136387