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Dhangar K, Kumar M, Aouad M, Mahlknecht J, Raval NP. Aggregation behaviour of black carbon in aquatic solution: Effect of ionic strength and coexisting metals. CHEMOSPHERE 2023; 311:137088. [PMID: 36332736 DOI: 10.1016/j.chemosphere.2022.137088] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/26/2022] [Revised: 10/04/2022] [Accepted: 10/30/2022] [Indexed: 06/16/2023]
Abstract
Black Carbon (BC) is an important constituent of both aquatic and terrestrial environment, but also has several adverse effects on human health, aquatic life, and contributes to the global climate change. Thus, to understand the fate and transport of BC nanoparticles (NPs) in the environment, it's important to understand the colloidal stability or aggregation behaviour and factors affecting it, under various environmental conditions, including both aquatic and atmospheric. This study investigated the individual influence of ionic strengths, valence (Na+, Ca2+ and Mg2+), metals (Zn2+, Cu2+, Ni2+ and Cd2+), and organic substances (PO43- and Humic Acid: HA) on the effective diameter or hydrodynamic diameter and zeta potential of BC-NPs in aquatic systems. A dynamic light scattering (DLS) principle-based 90 Plus Particle Size Analyzer was used for measurements of BC particle size and zeta potential at varying ionic chemistry. The results showed that strong ionic strength promotes aggregation of BC-NPs till the repulsion forces become dominant due to more negative zeta potential. The Aggregation of BC-NPs was observed to be significantly dependent on the ionic valence, where divalent ions caused more aggregation than monovalent ions. Metal ions at higher concentration (around 1 mM) promoted the aggregation rate of BC-NPs, and Cu+2 dominated among all selected metals. Conversely, organic matter (PO43- and HA) tends to promote stabilisation of BC-NPs instead of aggregation. Though this study investigated individual effect of substances, influence of possible environmental combination of substances will help to get more clear idea.
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Affiliation(s)
- Kiran Dhangar
- Discipline of Earth Science, Indian Institute of Technology Gandhinagar, Gujarat, 382-355, India
| | - Manish Kumar
- Discipline of Earth Science, Indian Institute of Technology Gandhinagar, Gujarat, 382-355, India; Sustainability Cluster, School of Engineering, University of Petroleum & Energy Studies, Dehradun, Uttarakhand, 248007, India; Escuela de Ingeniería y Ciencias, Tecnologico de Monterrey, Campus Monterrey, Eugenio Garza Sada 2501 Sur, Monterrey, 64849, Mexico.
| | - Marwan Aouad
- College of Engineering, Applied Science University, Bahrain
| | - Jurgen Mahlknecht
- Escuela de Ingeniería y Ciencias, Tecnologico de Monterrey, Campus Monterrey, Eugenio Garza Sada 2501 Sur, Monterrey, 64849, Mexico
| | - Nirav P Raval
- Laboratoire Environnement Dynamiques Territoires Montagnes, Université Savoie Mont Blanc, Campus Scientifique - Savoie Technolac, Le Bourget-du-Lac, 73376, Cedex, France
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Laguta AN, Mchedlov-Petrossyan NO, Kovalenko SM, Voloshina TO, Haidar VI, Filatov DY, Trostyanko PV, Karbivski VL, Bogatyrenko SI, Xu L, Prezhdo OV. Stability of Aqueous Suspensions of COOH-Decorated Carbon Nanotubes to Organic Solvents, Esterification, and Decarboxylation. J Phys Chem Lett 2022; 13:10126-10131. [PMID: 36269855 DOI: 10.1021/acs.jpclett.2c02902] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Carbon nanotubes are among the most widely used nanosystems, and stability of carbon nanotube suspensions is critical for nanotechnology and environmental science. Remaining in aqueous environment alone misses important factors that regulate colloidal stability in the presence of electrolytes. Indeed, introduction of (80-95) vol % organic solvents leads to sharp changes in suspension properties depending on the solvent. For example, the critical coagulation concentrations for a given inorganic or organic coagulating ion can change by 2 orders of magnitude when going from dimethyl sulfoxide to acetonitrile. We establish and explain these trends by Lewis acid-base interactions and show that a strong interaction extending beyond the standard theory of aggregation plays an important role.
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Affiliation(s)
- A N Laguta
- Department of Physical Chemistry, V. N. Karazin Kharkiv National University, Kharkiv61022, Ukraine
- Department of Mathematics, Aston University, B47ET, Birmingham, U.K
| | - N O Mchedlov-Petrossyan
- Department of Physical Chemistry, V. N. Karazin Kharkiv National University, Kharkiv61022, Ukraine
| | - S M Kovalenko
- Department of Organic Chemistry, V. N. Karazin Kharkiv National University, Kharkiv61022, Ukraine
| | - T O Voloshina
- Department of Physical Chemistry, V. N. Karazin Kharkiv National University, Kharkiv61022, Ukraine
| | - V I Haidar
- Department of Physical Chemistry, V. N. Karazin Kharkiv National University, Kharkiv61022, Ukraine
| | - D Yu Filatov
- TOV firm ''PROMINVEST PLASTYK" Kharkiv, 2 Turgenevskaya str, Kharkiv61022, Ukraine
| | - P V Trostyanko
- Department of Organic Chemistry, V. N. Karazin Kharkiv National University, Kharkiv61022, Ukraine
| | - V L Karbivski
- G. V. Kurdyumov Institute for Metal Physics of the NAS of Ukraine, Kyiv02000, Ukraine
- Leibniz Institute for Solid State and Materials Research, Dresden, 01069, Germany
| | - S I Bogatyrenko
- Physico-Tekhnical Faculty, V. N. Karazin Kharkiv National University, Kharkiv61022, Ukraine
| | - Liyuan Xu
- Department of Physical Chemistry, V. N. Karazin Kharkiv National University, Kharkiv61022, Ukraine
- Ordos Second Affiliated School of Beijing Normal University, Airport Logistics Park, Ordos, Inner Mongolia Autonomous Region017200, People's Republic of China
| | - O V Prezhdo
- Department of Chemistry, University of Southern California, Los Angeles, California90089, United States
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