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Dong Y, Hua Z, Zhang Q, Zeng H, Yue T, Tang H, Sun W. Enhanced flocculation and sedimentation of copper tailings by polycarboxylate ether superplasticizer. Sep Purif Technol 2023. [DOI: 10.1016/j.seppur.2023.123696] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/08/2023]
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2
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Shi Z, Ran B, Liu L. Determining the interaction energy of a quartz–kaolinite system at different pH levels by atomic force microscopy and extended DLVO theory. POWDER TECHNOL 2022. [DOI: 10.1016/j.powtec.2022.117842] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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3
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Permeability estimation in filter cake based on X-ray microtomography and Lattice Boltzmann method. Sep Purif Technol 2021. [DOI: 10.1016/j.seppur.2021.119114] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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4
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Kosmulski M. The pH dependent surface charging and points of zero charge. IX. Update. Adv Colloid Interface Sci 2021; 296:102519. [PMID: 34496320 DOI: 10.1016/j.cis.2021.102519] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2021] [Revised: 08/26/2021] [Accepted: 08/27/2021] [Indexed: 01/23/2023]
Abstract
of the points of zero charge (PZC) and isoelectric points (IEP) of various materials published in the recent literature and of older results overlooked in the previous compilations. The roles of experimental conditions, especially of the temperature, of the nature and concentration of supporting electrolyte, and of the type of apparatus are emphasized. The newest results are compared with the zero points reported in previous reviews. Most recent studies were carried out with materials whose pH dependent surface charging is already well-documented, and the newest results are consistent with the older literature. Isoelectric points of Gd(OH)3, Sm(OH)3, and TeO2 have been reported for the first time in the recent literature.
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Affiliation(s)
- Marek Kosmulski
- Lublin University of Technology, Nadbystrzycka 38, PL-20618 Lublin, Poland.
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Fijałkowska G, Wiśniewska M, Szewczuk-Karpisz K, Jędruchniewicz K, Oleszczuk P. Comparison of lead(II) ions accumulation and bioavailability on the montmorillonite and kaolinite surfaces in the presence of polyacrylamide soil flocculant. CHEMOSPHERE 2021; 276:130088. [PMID: 33711797 DOI: 10.1016/j.chemosphere.2021.130088] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/26/2021] [Revised: 02/18/2021] [Accepted: 02/21/2021] [Indexed: 06/12/2023]
Abstract
Heavy metals, such as Pb(II), Cd(II), Hg(II), do not degrade like organic compounds and remain in soil for a long time. The presence of organic, mineral or polymeric substances (such as polyacrylamides) may contribute to the accumulation and immobilization of toxic metals in poorly absorbable form for living organisms. The main aim of the study was to compare the effectiveness of lead(II) ions immobilization on the layered aluminosilicate surfaces in the anionic polyacrylamide presence. The effectiveness of Pb(II) adsorption was tested depending on metal cation concentration, content of dissociable groups in added flocculant as well as internal structure of clay mineral. The desorption tests of heavy metal ions were performed by the use of water and EDTA (ethylenediaminetetraacetic acid). By means of measurements of suspension stability and aggregate size formed in the studied systems, the flocculating ability of anionic polyacrylamide was checked. The electrokinetic parameters of mineral particles, i.e. surface charge density and electrokinetic potential, without and with individual adsorbates were also determined. It has been shown that the Pb cations adsorbed amount and the effectiveness of their immobilization strongly depends on the polyacrylamide presence in the system and the internal structure of aluminosilicate.
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Affiliation(s)
- Gracja Fijałkowska
- Department of Radiochemistry and Environmental Chemistry, Institute of Chemical Sciences, Faculty of Chemistry, Maria Curie- Sklodowska University in Lublin, M. Curie-Sklodowska Sq. 3, 20-031, Lublin, Poland
| | - Małgorzata Wiśniewska
- Department of Radiochemistry and Environmental Chemistry, Institute of Chemical Sciences, Faculty of Chemistry, Maria Curie- Sklodowska University in Lublin, M. Curie-Sklodowska Sq. 3, 20-031, Lublin, Poland
| | | | - Katarzyna Jędruchniewicz
- Department of Radiochemistry and Environmental Chemistry, Institute of Chemical Sciences, Faculty of Chemistry, Maria Curie- Sklodowska University in Lublin, M. Curie-Sklodowska Sq. 3, 20-031, Lublin, Poland
| | - Patryk Oleszczuk
- Department of Radiochemistry and Environmental Chemistry, Institute of Chemical Sciences, Faculty of Chemistry, Maria Curie- Sklodowska University in Lublin, M. Curie-Sklodowska Sq. 3, 20-031, Lublin, Poland.
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6
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DFT study of the adsorption of 2,3-epoxypropyltrimethylammonium chloride on montmorillonite surfaces. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.116145] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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7
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Jeldres M, Robles P, Toledo PG, Saldaña M, Quezada L, Jeldres RI. Improved dispersion of clay-rich tailings in seawater using sodium polyacrylate. Colloids Surf A Physicochem Eng Asp 2021. [DOI: 10.1016/j.colsurfa.2020.126015] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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8
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Zhang L, Kang T, Kang J, Zhang X, Zhang R, Kang G. Effects of Electrolyte pH on the Electro-Osmotic Characteristics in Anthracite. ACS OMEGA 2020; 5:29257-29264. [PMID: 33225156 PMCID: PMC7676344 DOI: 10.1021/acsomega.0c04013] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/19/2020] [Accepted: 10/20/2020] [Indexed: 05/28/2023]
Abstract
Accelerating the drainage of water in coal reservoirs can significantly improve the extraction efficiency of coalbed methane (CBM). The movement of water with different pH values in anthracite was tested and analyzed. The results showed that the electro-osmotic flow velocity increased first and then slightly decreased with the increase of time up to 120 h. The electro-osmotic flow was markedly strengthened under a strong acid (pH 2) or strong alkaline (pH 13) environment, and the direction of electro-osmosis was reversed at a pH of 3-4. The changes in zeta potential, surface groups, and minerals in anthracite were tested to analyze the mechanism of electro-osmotic characteristics. The results obtained from this work will provide a basis for the process of drainage and depressurization during the CBM extraction.
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Affiliation(s)
- Liankun Zhang
- Key
Laboratory of In-situ Property-improving Mining of Ministry of Education, Taiyuan University of Technology, Taiyuan 030024, PR China
| | - Tianhe Kang
- Key
Laboratory of In-situ Property-improving Mining of Ministry of Education, Taiyuan University of Technology, Taiyuan 030024, PR China
| | - Jianting Kang
- College
of Safety and Emergency Management Engineering, Taiyuan University of Technology, Taiyuan 030024, PR China
| | - Xiaoyu Zhang
- Key
Laboratory of In-situ Property-improving Mining of Ministry of Education, Taiyuan University of Technology, Taiyuan 030024, PR China
| | - Runxu Zhang
- Key
Laboratory of In-situ Property-improving Mining of Ministry of Education, Taiyuan University of Technology, Taiyuan 030024, PR China
| | - Guanxian Kang
- Key
Laboratory of In-situ Property-improving Mining of Ministry of Education, Taiyuan University of Technology, Taiyuan 030024, PR China
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Li H, Chen J, Peng C, Min F, Song S. Salt coagulation or flocculation? In situ zeta potential study on ion correlation and slime coating with the presence of clay: A case of coal slurry aggregation. ENVIRONMENTAL RESEARCH 2020; 189:109875. [PMID: 32979991 DOI: 10.1016/j.envres.2020.109875] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/22/2020] [Revised: 06/22/2020] [Accepted: 06/22/2020] [Indexed: 06/11/2023]
Abstract
The aggregation state of mineral slurry by coagulant with the presence of clay nanosheets appears similar to a flocculation gel with the absence of flocculant. The interactions between particles in mixed clay and quartz minerals systems are influenced by the interactions of ion correlation and slime coating, which creates zeta potential variation. Particle concentration has a substantial effect on zeta potential, and coal slurry has a relative high particle concentration. To realize an in situ aggregation study, zeta potential measurement of coal slurry was performed using electrokinetic sonic amplitude (ESA) without dilution at different calcium ion concentrations and pH values. The zeta potentials of three minerals commonly occurring in coal slurry (quartz, kaolinite and montmorillonite) with similar particle concentrations were also measured. The result suggests that aggregation of coal slurry by calcium ions in the presence of clay minerals belongs to fluctuation. The ion correlation and slime coating could be detected by ESA with a decrease in zeta potential under high calcium ion concentration conditions. The face-face coagulated clay nanosheets were formed by ion correlation, acting as a "flocculant chain". The adsorption force between the "flocculant" and particles is described as a slime coating. This flocculation process is referred to as "salt-clay-coagulation-flocculation" (SCCF). During ion correlation, rearrangement of the electric double layer between face-face spaces causes a reduction of the zeta potential. The super-fine negatively charged clay nanosheets might coat onto the quartz particle surfaces under the effect of electrostatic attraction force and Ca2+ ion correlation. Quartz and clay minerals were oppositely charged because the special adsorption of calcium ions on the clay basal face was restricted in hexatomic rings.
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Affiliation(s)
- Hongliang Li
- College of Mining Engineering, Taiyuan University of Technology, Taiyuan, 030024, China; Department of Chemical and Materials Engineering, University of Alberta, Edmonton, Alberta, T6G2V4, Canada.
| | - Jun Chen
- Department of Materials Science and Engineering, Huainan, 232001, China.
| | - Chenliang Peng
- Institute of Engineering and Research, Jiangxi University of Science and Technology, Ganzhou, 341000, China
| | - Fanfei Min
- Department of Materials Science and Engineering, Huainan, 232001, China
| | - Shaoxian Song
- School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan, Hubei, 430070, China
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