Surface thermodynamics at the nanoscale

The surface tension and viscosity values of N-methyldiethanolamine (MDEA) aqueous solutions promoted by tetramethylammonium arginate ([N1111][Arg]) were measured and modeled. The experimental temperatures were 303.2 to 323.2 K. The mass fractions of MDEA (wMDEA) and [N1111][Arg] (w[N1111][Arg]) were 0.300 to 0.500 and 0.025 to 0.075, respectively. The measured surface tension and viscosity values were satisfactorily fitted to thermodynamic models. With the aid of experimentally viscosity data, the activation energy (Ea) and H2S diffusion coefficient (DH2S) of MDEA-[N1111][Arg] aqueous solution were deduced. The surface entropy and surface enthalpy of the solutions were calculated using the fitted model of the surface tension. The quantitative relationship between the calculated values (surface tension, surface entropy, surface enthalpy, viscosity, activation energy, and H2S diffusion coefficient) and the operation conditions (mass fraction and temperature) was demonstrated.

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Surface Thermodynamics and Some Engineering Properties of an Organo-Clay

Journal of Geotechnical and Geoenvironmental Engineering ◽

10.1061/(asce)1090-0241(1997)123:6(580) ◽

1997 ◽

Vol 123 (6) ◽

pp. 580-587 ◽

Cited By ~ 11

Author(s):

Muniram Budhu ◽

R. F. Giese ◽

C. J. van Oss

Keyword(s):

Engineering Properties ◽

Surface Thermodynamics ◽

Organo Clay

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Development of homogeneous/heterogeneous reaction in flow based through non-Darcy Forchheimer medium

Journal of Theoretical and Computational Chemistry ◽

10.1142/s0219633617500456 ◽

2017 ◽

Vol 16 (05) ◽

pp. 1750045 ◽

Cited By ~ 14

Author(s):

Tasawar Hayat ◽

Faisal Shah ◽

Ahmed Alsaedi ◽

Muhammad Ijaz Khan

Keyword(s):

Magnetic Parameter ◽

Heterogeneous Reaction ◽

Phase Changes ◽

Heterogeneous Reactions ◽

Medium Effect ◽

Effect Of Temperature ◽

Temperature Phase ◽

Surface Thermodynamics ◽

Isothermal Model ◽

Physical Quantities

The objective here is to analyze the influence of homogeneous and heterogeneous reactions in flow induced by convectively heated sheet with nonlinear velocity and variable thickness. Porous medium effect is characterized by Darcy–Forchheimer consideration. A simple isothermal model of homogeneous–heterogeneous reactions is used to regulate the temperature of stretched surface. Thermodynamics processes of homogeneous–heterogeneous reactions analyze the effect of temperature phase changes. Resulting problems are computed for the convergent solutions of velocity, temperature and concentration. Analysis for the influential variables on the physical quantities is graphically examined. Our computed results interpret that velocity field decays for larger magnetic parameter while temperature field enhances for higher estimation of Biot number.

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On Basic Concepts in Surface Thermodynamics.

The Journal of Physical Chemistry ◽

10.1021/j150490a009 ◽

1951 ◽

Vol 55 (7) ◽

pp. 1195-1200 ◽

Cited By ~ 6

Author(s):

Robert S. Hansen

Keyword(s):

Surface Thermodynamics ◽

Basic Concepts

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Applied Surface Thermodynamics – Second Edition

Focus on Powder Coatings ◽

10.1016/s1364-5439(12)70042-4 ◽

2012 ◽

Vol 2012 (2) ◽

pp. 7

Keyword(s):

Surface Thermodynamics

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Carbon Nanotubes Hybrid Hydrogels for Environmental Remediation: Evaluation of Adsorption Efficiency under Electric Field

Molecules ◽

10.3390/molecules26227001 ◽

2021 ◽

Vol 26 (22) ◽

pp. 7001

Author(s):

Giuseppe Cirillo ◽

Manuela Curcio ◽

Lorenzo Francesco Madeo ◽

Francesca Iemma ◽

Giovanni De De Filpo ◽

...

Keyword(s):

Carbon Nanotubes ◽

Electric Field ◽

Environmental Remediation ◽

Kinetic Studies ◽

Surface Thermodynamics ◽

Ph Variation ◽

Hybrid Hydrogels ◽

Hydrogel Network ◽

Dyes Adsorption ◽

Influence Of Ph

The performance of Carbon Nanotubes hybrid hydrogels for environmental remediation was investigated using Methylene Blue (MB), Rhodamine B (RD), and Bengal Rose (BR) as model contaminating dyes. An acrylate hydrogel network with incorporated CNT was synthesized by photo-polymerization without any preliminary derivatization of CNT surface. Thermodynamics, isothermal and kinetic studies showed favorable sorption processes with the application of an external 12 V electric field found to be able to influence the amount of adsorbed dyes: stronger interactions with cationic MB molecules ( and of 19.72 and 33.45 mg g−1, respectively) and reduced affinity for anionic RD ( and of 28.93 and 13.06 mg g−1, respectively) and neutral BR ( and of 36.75 and 15.85 mg g−1, respectively) molecules were recorded. The influence of pH variation on dyes adsorption was finally highlighted by reusability studies, with the negligible variation of adsorption capacity after five repeated sorption cycles claiming for the suitability of the proposed systems as effective sorbent for wastewater treatment.

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