![Adsorption and thermochemical data of divalent cations onto silica gel surface modified with humic acid at solid/liquid interface [An article from: Journal of Hazardous Materials]](https://www.ebooknetworking.net/books/B00/0RR/bigB000RR45D4.jpg)
Adsorption and thermochemical data of divalent cations onto silica gel surface modified with humic acid at solid/liquid interface [An article from: Journal of Hazardous Materials]
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Book Details
Author(s)
A.G.S. Prado, B.S. Miranda, L.F. Zara
Publisher
Elsevier
ISBN / ASIN
B000RR45D4
ISBN-13
978B000RR45D5
Marketplace
France 🇫🇷
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Description
This digital document is a journal article from Journal of Hazardous Materials, published by Elsevier in 2005. The article is delivered in HTML format and is available in your Amazon.com Media Library immediately after purchase. You can view it with any web browser.
Description:
Humic acid immobilized onto silica gel surface was studied by the calorimetric titration of divalent cations in aqueous solution. The adsorption isotherms were obtained by the batchwise method and were fitted to a modified Langmuir equation. The maximum number of moles per gram of the material gave: 10.42+/-0.75, 13.16+/-0.58, 7.87+/-0.58 for copper, nickel and zinc, respectively. Gibbs free energies were negative for all systems and the adsorption interactions calorimetrically followed presented endothermic enthalpic values: 6.24+/-0.47, 6.75+/-0.74, 6.97+/-0.58kJmol^-^1 for the same sequence of divalent cations. All liquid/solid interface adsorptions were entropically driven.
Description:
Humic acid immobilized onto silica gel surface was studied by the calorimetric titration of divalent cations in aqueous solution. The adsorption isotherms were obtained by the batchwise method and were fitted to a modified Langmuir equation. The maximum number of moles per gram of the material gave: 10.42+/-0.75, 13.16+/-0.58, 7.87+/-0.58 for copper, nickel and zinc, respectively. Gibbs free energies were negative for all systems and the adsorption interactions calorimetrically followed presented endothermic enthalpic values: 6.24+/-0.47, 6.75+/-0.74, 6.97+/-0.58kJmol^-^1 for the same sequence of divalent cations. All liquid/solid interface adsorptions were entropically driven.
