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Standard molar entropy
About: Standard molar entropy is a research topic. Over the lifetime, 1586 publications have been published within this topic receiving 29886 citations.
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TL;DR: In this article, the defect structure of perovskite-type oxide solid solution La 1− x Sr x CrO 3− δ was measured as a function of oxygen partial pressure P O 2 at 1000-1300°C, for compositions of x = 0.1-0.3 by means of a thermogravimetric method.
189 citations
TL;DR: In this paper, the adsorption kinetics of Th(IV) on oxidized multi-wall carbon nanotubes (MWCNTs) were investigated at initial Th-IV concentrations 32.32 and 64.64μmol/L.
182 citations
TL;DR: Montmorillonite clay modified with iron oxide (MtMIO) was prepared for use as an adsorbent of methylene blue dye in this article, where the activation energy of + 19.32 kJ−mol−1 was determined using the Arrhenius equation.
179 citations
TL;DR: In this paper, a nanocomposite of multi-walled carbon nanotubes (MWCNT) functionalized with chitosan (CS) and poly-2-hydroxyethyl methacrylate (pHEMA) was prepared and characterized.
179 citations
01 Feb 2009
TL;DR: The sorption kinetics and thermodynamics of 1,3-dinitrobenzene (DNB), m-nitrotoluene (mNT), p-nitrophenol (pNP), and nitrobenZene (NB) on as-grown and nitric acid-oxidized multiwalled carbon nanotubes (MWCNTs) suggested that the sorption of nitroaromatics (NACs) onto MWCNTs
Abstract: The sorption kinetics and thermodynamics of 1,3-dinitrobenzene (DNB), m-nitrotoluene (mNT), p-nitrophenol (pNP), and nitrobenzene (NB) on as-grown and nitric acid-oxidized multiwalled carbon nanotubes (MWCNTs) were investigated. The sorption kinetics was well described by a pseudo-second-order rate model, while both Langmuir and Freundlich models described the sorption isotherms well and the sorption thermodynamic parameters of equilibrium constant (K(0)), standard free energy (DeltaG), standard enthalpy (DeltaH), and standard entropy changes (DeltaS) were measured. The values of DeltaH and DeltaG suggested that the sorption of nitroaromatics (NACs) onto MWCNTs was exothermic and spontaneous. The structure, number, and position of nitro groups of NACs were the main factors affecting the sorption rate and capacity. Treatment of the MWCNTs with nitric acid increased both the surface area and the pore volume and introduced oxygen-containing functional groups to the MWCNTs, which depressed the sorption of NACs onto MWCNTs.
170 citations