Metastable equilibrium in the C-H-O system: Graphite deposition in crustal fluids

The adsorption of Pb(II) and Cu(II) onto Fe3O4@Mg2Al-NO3 Layered Double Hydroxide (LDH) as a function of Fe3O4@Mg2Al-NO3 LDH concentration was studied. An adsorbent concentration effect ( Cs effect), namely adsorption isotherm declines as adsorbent concentration ( Cs) increases, was observed. The experimental data were fitted to the adsorption models including the classic Freundlich model, the metastable-equilibrium adsorption theory, the flocculation model, the power function model, and the surface component activity model. The results show that the Freundlich-type metastable-equilibrium adsorption equation, the power function model, and the Freundlich-surface component activity equation can adequately describe the Cs effect observed in the batch adsorption tests as all the correlation coefficients ( R2) of the nonlinear plots are higher than 0.96. In other words, their intrinsic parameters simulated from the experimental data are independent of Cs value. It is considered that the Freundlich-surface component activity equation is the best model to describe the Cs effect of the studied adsorption systems by Akaike Information Criterion evaluation criterion.

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Generation and migration of deep crustal fluids during regional metamorphism

Chemical Geology ◽

10.1016/0009-2541(88)90685-7 ◽

1988 ◽

Vol 70 (1-2) ◽

pp. 165

Author(s):

Alan Bruce Thompson ◽

James A.D. Connolly

Keyword(s):

Regional Metamorphism ◽

Crustal Fluids ◽

And Migration

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Phylogenomic Analysis of Viral Genomes Assembled from Juan de Fuca Ridge Flank Basalt-Hosted Crustal Fluids

10.46427/gold2020.2448 ◽

2020 ◽

Author(s):

Cherise Spotkaeff ◽

Michael Rappe ◽

Sean Jungbluth ◽

Grieg Steward ◽

Olivia Nigro

Keyword(s):

Juan De Fuca Ridge ◽

Phylogenomic Analysis ◽

Viral Genomes ◽

Fuca Ridge ◽

Crustal Fluids ◽

Juan De Fuca ◽

Ridge Flank

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Studying thermodynamics of metastable states

Facta universitatis - series Physics Chemistry and Technology ◽

10.2298/fupct0502115k ◽

2005 ◽

Vol 3 (2) ◽

pp. 115-128

Author(s):

Yuri Kornyushin

Keyword(s):

Heat Capacity ◽

Relaxation Time ◽

Metastable Phase ◽

Nonequilibrium State ◽

Metastable States ◽

Metastable Equilibrium ◽

General Description ◽

Stable States ◽

Heated Sample ◽

Temperature Oscillations

Simple classical thermodynamic approach to the general description of metastable states is presented. It makes it possible to calculate the explicit dependence of the Gibbs free energy on temperature, to calculate the heat capacity, the thermodynamic barrier, dividing metastable and more stable states, and the thermal expansion coefficient. Thermodynamic stability under mechanical loading is considered. The influence of the heating (cooling) rate on the measured dynamic heat capacity is investigated. A phase shift of the temperature oscillations of an ac heated sample is shown to be determined by the relaxation time of the relaxation of the metastable nonequilibrium state back to the metastable equilibrium one. This dependence allows one to calculate the relaxation time. A general description of the metastable phase equilibrium is proposed. Metastable states in AB3 alloys are considered. Reasons for the change from the diffusional mechanism of the supercritical nucleus growth to the martensitic one as the heating rate increases are discussed. The Ostwald stage rule is derived.

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