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Rosenholm JB. Packing in multimodal crystals and particle assemblies as models for dynamic packing during spontaneous and enforced particle movement: Settling, viscosity and elasticity. Adv Colloid Interface Sci 2024; 331:103165. [PMID: 38964197 DOI: 10.1016/j.cis.2024.103165] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2024] [Revised: 04/23/2024] [Accepted: 04/24/2024] [Indexed: 07/06/2024]
Abstract
Colloid particles (CP, 10-8-10-6 m = 10-1000 nm) are used as models for atom scale processes, such as crystallization since the process is experimentally observable. Packing of atoms in crystals resemble mono-, bi-, and trimodal packing of noncharged hard spheres (particles). When the size of one particle exceeds the two others an excluded volume consisting of small particles is created around large particles. This is also the case when colloid particles are dispersed in water. The formation of an excluded volume does not require attraction forces, but it is enforced by the presence of dissolved primary (cations) and secondary (protons of surface hydroxyls) potential determining ions. The outcome is an interfacial solid-liquid charge. This excluded volume, denoted Stern layer is characterized by the surface potential and charge density. Charge neutrality is identified by point of zero charge (pHpzc and pcpzc). Outside Stern layer another excluded volume is formed of loosely bound counterions which interact with Stern layer. The extent of this diffuse layer is given by inverse Debye length and effective ζ-potential. The overall balance between attractive and repulsive energies is provided by Derjaguin-Landau-Veerwey-Overbeek (DLVO) model. Charge neutrality is identified at isoelectric point (pHiep and pciep). The dependence of viscosity and yield stress on shear rate may be modeled by von Smoluchowski's volumetric collision frequency multiplied by some total interaction energy given by DLVO model. Equilibrium and dynamic models for settling and enforced particle movement (viscosity) are presented. Both compressive yield stress (sedimentation) and cohesive energy (viscoelasticity) are characterized by power law exponents of volume fraction. The transition of disperse suspensions (sols) to spanning clusters (gels) is identified by oscillatory rheology. The slope of linear plots of logarithmic storage (G´) and loss (G") moduli against logarithm of frequency or logarithm of volume fraction provide power law exponents from the slopes. These exponents relate to percolation and fractal dimensions characterizing the particle network. Moreover, it identifies the structure formation process either as diffusion limited cluster-cluster (DLCCA) or as reaction limited cluster-cluster (RLCCA) aggregation.
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Affiliation(s)
- Jarl B Rosenholm
- Physical Chemistry, Laboratory of Molecular Science and Engineering, Aurum Åbo Akademi University, Henriksgatan 2, 20500, Åbo, Turku, Finland.
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A review of zeta potential measurements using electroacoustics. Adv Colloid Interface Sci 2022; 309:102778. [DOI: 10.1016/j.cis.2022.102778] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2022] [Revised: 09/10/2022] [Accepted: 09/15/2022] [Indexed: 11/23/2022]
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Abstract
Coal slurry is an essential component of mining operations, accounting for more than half of operating costs. Dewatering technology is simultaneously confronted with obstacles and possibilities, and it may yet be improved as the crucial step for reducing the ultimate processing cost. Coagulation/flocculation is used as a dewatering process that is reasonably cost-effective and user-friendly. This paper reviews application of different coagulants/flocculants and their combinations in dewatering mechanisms. In this context, various polymeric flocculants are discussed in the coal slurry in depth. Many operational parameters that influence the performance of coal slurry flocculation are also presented. Furthermore, a discussion is provided on the mechanism of flocculants’ interaction, the strategy of combining flocculants, and efficient selection methods of flocculants. Finally, coagulation/flocculation remaining challenges and technological improvements for the better development of highly efficient treatment methods were highlighted, focusing on the intricate composition of slurry and its treatment difficulties.
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Benn F, Fawell P, Halewood J, Austin P, Costine A, Jones W, Francis N, Druett D, Lester D. Sedimentation and consolidation of different density aggregates formed by polymer-bridging flocculation. Chem Eng Sci 2018. [DOI: 10.1016/j.ces.2018.03.037] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Zhang J, Li H, Li S, Hou X. Effects of metal ions with different valences on colloidal aggregation in low-concentration silica colloidal systems characterized by continuous online zeta potential analysis. Colloids Surf A Physicochem Eng Asp 2015. [DOI: 10.1016/j.colsurfa.2015.04.024] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Lee B, Koo S. Estimation of microstructure of titania particulate dispersion through viscosity measurement. POWDER TECHNOL 2014. [DOI: 10.1016/j.powtec.2014.06.014] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Franks GV, O'Shea JP, Forbes E. Controlling thickener underflow rheology using a temperature responsive flocculant. AIChE J 2014. [DOI: 10.1002/aic.14469] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- George V. Franks
- Dept. of Chemical and Biomolecular Engineering; Australian Mineral Science Research Institute, University of Melbourne; Parkville Victoria 3010 Australia
| | - John-Paul O'Shea
- Dept. of Chemical and Biomolecular Engineering; Australian Mineral Science Research Institute, University of Melbourne; Parkville Victoria 3010 Australia
| | - Elizaveta Forbes
- Dept. of Chemical and Biomolecular Engineering; Australian Mineral Science Research Institute, University of Melbourne; Parkville Victoria 3010 Australia
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Castellani R, Poulesquen A, Goettmann F, Marchal P, Choplin L. Ions effects on sol–gel transition and rheological behavior in alumina slurries. Colloids Surf A Physicochem Eng Asp 2013. [DOI: 10.1016/j.colsurfa.2013.03.056] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Alamgir A, Harbottle D, Masliyah J, Xu Z. Al-PAM assisted filtration system for abatement of mature fine tailings. Chem Eng Sci 2012. [DOI: 10.1016/j.ces.2012.06.010] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Rouissi T, Tyagi RD, Brar SK, Prevost D, John RP, Surampalli RY. Efficient and simple method for determination of suspendibility of bio-inoculant suspensions. BIORESOURCE TECHNOLOGY 2011; 102:10754-10758. [PMID: 21945163 DOI: 10.1016/j.biortech.2011.08.133] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/30/2011] [Revised: 08/26/2011] [Accepted: 08/31/2011] [Indexed: 05/31/2023]
Abstract
This study assessed the utilization of viscosity and zeta potential as a novel method to evaluate suspendibility of formulation of Sinorhizobium meliloti grown in starch industry wastewater for use as bio-inoculants. For this objective, sorbitol was used as a suspending agent at concentrations of 0 to 10% w/v. Model, based on multiple linear regression (with pH as dependant variable, and zeta potential, average particle size and sorbitol concentration as independent variables) demonstrated an important relation which was significant (p<0.001, R2=0.98). Sigmoid regression revealed a significant relation between zeta potential and suspendibility with p value=0.007 and R-squared=0.86, and between viscosity and suspendibility (p value<0.0001 and R squared=0.9823). Thus, these direct correlations established the lowering of measurement time from 12 h to 5 min.
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Affiliation(s)
- T Rouissi
- INRS-ETE, Université du Québec, 490 rue de la Couronne, Québec, Canada G1K 9A9.
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Harbottle D, Fairweather M, Biggs S. The minimum transport velocity of colloidal silica suspensions. Chem Eng Sci 2011. [DOI: 10.1016/j.ces.2011.02.012] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Petryshyn RS, Yaremko ZM, Soltys MN. Effects of surfactants and pH of medium on zeta potential and aggregation stability of titanium dioxide suspensions. COLLOID JOURNAL 2010. [DOI: 10.1134/s1061933x10040125] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Solid–liquid separations with a temperature-responsive polymeric flocculant: Effect of temperature and molecular weight on polymer adsorption and deposition. J Colloid Interface Sci 2010; 348:9-23. [DOI: 10.1016/j.jcis.2010.04.063] [Citation(s) in RCA: 62] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2009] [Revised: 04/16/2010] [Accepted: 04/20/2010] [Indexed: 11/23/2022]
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Hamieh T, Toufaily J, Alloul H. Physicochemical Properties of the Dispersion of Titanium Dioxide in Organic Media by Using Zetametry Technique. J DISPER SCI TECHNOL 2010. [DOI: 10.1080/01932690701856626] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- Tayssir Hamieh
- a Laboratoire de Chimie Analytique, Matériaux, Surfaces et Interfaces (CHAMSI), Département de Chimie, Faculté des Sciences , Université Libanaise , Hadeth, Mont-Liban , Beyrouth , Liban
- b Institut de Chimie des Surfaces et Interfaces (ICSI-CNRS) , Mulhouse , France
| | - Joumana Toufaily
- a Laboratoire de Chimie Analytique, Matériaux, Surfaces et Interfaces (CHAMSI), Département de Chimie, Faculté des Sciences , Université Libanaise , Hadeth, Mont-Liban , Beyrouth , Liban
| | - Haytham Alloul
- a Laboratoire de Chimie Analytique, Matériaux, Surfaces et Interfaces (CHAMSI), Département de Chimie, Faculté des Sciences , Université Libanaise , Hadeth, Mont-Liban , Beyrouth , Liban
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Iritani E, Hashimoto T, Katagiri N. Gravity consolidation–sedimentation behaviors of concentrated TiO2 suspension. Chem Eng Sci 2009. [DOI: 10.1016/j.ces.2009.07.013] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Eriksson R, Pajari H, Rosenholm JB. Shear modulus of colloidal suspensions: Comparing experiments with theory. J Colloid Interface Sci 2009; 332:104-12. [DOI: 10.1016/j.jcis.2008.12.034] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2008] [Revised: 11/13/2008] [Accepted: 12/11/2008] [Indexed: 11/26/2022]
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Satone H, Mamiya T, Mori T, Tsubaki J. Solidification mechanism of the sediment formed by particle settling – Analysis of the formation of the solidified layer. ADV POWDER TECHNOL 2009. [DOI: 10.1016/j.apt.2008.10.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Re-dispersion of metal carbonate powders in dispersive media of various chemical nature. Colloids Surf A Physicochem Eng Asp 2008. [DOI: 10.1016/j.colsurfa.2007.10.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Gustafsson J, Nordenswan E, Rosenholm JB. Consolidation behavior in sedimentation of TiO(2) suspensions in the presence of electrolytes. J Colloid Interface Sci 2003; 258:235-43. [PMID: 12618092 DOI: 10.1016/s0021-9797(02)00177-7] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The consolidation of TiO(2) suspensions (anatase and rutile) due to gravity sedimentation in the presence of electrolytes has been investigated as a function of pH. Sodium and barium nitrate were used as flocculating electrolytes. The particle interaction was related to the zeta potential and the thickness of the electrical double layer, kappa(-1), by utilizing the repulsive barrier in the classical DLVO theory. The stability of the suspensions was represented as the average final solids content of the sediment cake, phi(fin). The batch sedimentation process was followed by scanning the sample cell with X-rays, from which the solids content and the particle size were calculated. Generally, dense sediments, with phi(fin) up to volume fractions of 0.5, were found for stable suspensions. Flocculated suspensions produced sediments with low phi(fin). The phi(fin) was observed to increase linearly with increasing repulsive barrier. However, at pH values only slightly higher than the isoelectric point (pH(iep)) the phi(fin) remained low until it returned to linearity at a pH much higher than pH(iep). This was attributed to the stronger affinity of sodium than of nitrate for the particle surface, which may be explained by the higher negative hydration energy of sodium. The stronger affinity of sodium was also shown as unsymmetrical distribution of phi(fin) around pH(iep), with stronger flocculation at pH>pH(iep). The interpretation of phi(fin) as a function of the repulsive barrier (or kappa(-1)) also made it possible to distinguish between the adsorption mechanisms of ions from solution. Addition of electrolyte at a fixed low and high pH (surface positively and negatively charged, respectively) clearly showed the specificity in adsorption and consequent flocculation of the barium ion from the indifferent nitrate. Sodium was, however, again observed to flocculate the TiO(2) suspensions slightly more strongly than nitrate.
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Affiliation(s)
- Jan Gustafsson
- Department of Physical Chemistry, Abo Akademi University, FIN-20500 Abo, Finland.
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