Adsorption characteristics of [Fe(III)–EDTA]− on granular activated carbon from aqueous solutions. Issue 3 (19th April 2012)

• Record Type: Journal Article
• Authors: Yang, Xiao‐Juan; Long, Xiang‐Li; Yuan, Wei‐Kang
• Is Part Of: Environmental progress & sustainable energy. Volume 32:Issue 3(2013:Oct.)
• Page Start: 470
• Page End: 479
• Publication Date: 2012-04-19
• Subjects: Environmental engineering -- Periodicals; Sustainable engineering -- Periodicals; Environmental chemistry -- Periodicals; 333.7
• DOI: 10.1002/ep.11646
• Languages: English
• ISSNs: 1944-7442

Abstract

<abstract abstract-type="main"> <title> <x xml:space="preserve">Abstract</x> </title> <p>In this study, the adsorption of [Fe(III)–EDTA]⁻ on coconut‐activated carbon from aqueous solutions has been studied in a batch stirred cell. Experiments have been carried out to investigate the effects of temperature, [Fe(III)–EDTA]⁻ concentration, pH, and activated carbon mass on [Fe(III)–EDTA]⁻ adsorption. The experimental results manifest that high temperature is favorable to the adsorption of [Fe(III)–EDTA]⁻ on the activated carbon. The [Fe(III)–EDTA]⁻ adsorption on activated carbon increases with its concentration in the aqueous solutions. However, the [Fe(III)–EDTA]⁻ adsorption on activated carbon decreases as the pH rises. The [Fe(III)–EDTA]⁻ adsorption on per gram of activated carbon decreases as the activated carbon mass increases. The kinetic study shows that [Fe(III)–EDTA]⁻ adsorption on the activated carbon is in good compliance with the pseudo‐second‐order kinetic model. The Langmuir and Freundlich equilibrium isotherm models are found to provide a good fitting of the adsorption data. Thermodynamic parameters such as <italic>E</italic>_a, Δ<italic>G</italic>⁰, Δ<italic>H</italic>⁰, and Δ<italic>S</italic>⁰ for adsorption reaction are estimated. © 2012 American Institute of Chemical Engineers Environ Prog, 32: 470–479, 2013</p> </abstract>