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Electrochemically assisted adsorption/desorption of bentazone on activated carbon cloth

AuthorsOvín Ania, María Concepción ; Béguin, F.
Activated carbon cloth
Liquid phase adsorption
Issue DateDec-2007
CitationAdsorption 13(5-6): 579-586 (2007)
AbstractThis paper investigates the use of electrochemical techniques for the removal of a common herbicide, bentazone, from water streams using a carbon-based electrode. Activated carbon cloth with high surface area and narrow micropores was used as electrode. For a better understanding of the process, adsorption was investigated under both open circuit and controlled polarization conditions, the latter in anodic and cathodic directions. It was found that anodic polarization enhances the kinetics of adsorption of the herbicide on the carbon cloth, the extent of which is strongly related to the applied current value. At converse, cathodic polarization induces the reversible desorption of the compound. Moreover, in-situ UV spectra recording on the solution did not show any structural change of the herbicide upon polarization, demonstrating the reversibility of the process for the regeneration of the adsorbent and the recovery of the compound. Based on these experiments, a mechanism is proposed to interpret the reversible sorption of bentazone under polarization.
Publisher version (URL)http://dx.doi.org/10.1007/s10450-007-9024-6
Appears in Collections:(INCAR) Artículos
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