caa a22 4500 463170482 CHVBK 20180406164811.0 cr unu---uuuuu 170326e20071201xx s 000 0 eng 10.1007/s10450-007-9024-6 doi (NATIONALLICENCE)springer-10.1007/s10450-007-9024-6 Electrochemically assisted adsorption/desorption of bentazone on activated carbon cloth [Elektronische Daten] [C. Ania, F. Béguin] This 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. Springer Science+Business Media, LLC, 2007 Electrosorption nationallicence Electrodesorption nationallicence Activated carbon cloth nationallicence Pesticides nationallicence Liquid phase adsorption nationallicence C : solution concentration (mg L−1) nationallicence Co : initial solution concentration (mg L−1) nationallicence DFT : density functional theory nationallicence DR : Dubinin-Radushkevich method nationallicence E : equilibrium reduction potential (Volts) nationallicence I : applied current (mA) nationallicence K ads : adsorption rate constant (min−1) nationallicence NHE : Normal Hydrogen Electrode nationallicence p : pressure nationallicence p0 : saturation pressure nationallicence pHPZC : pH of the point of zero charge (pH units) nationallicence PSD : pore size distribution nationallicence q : amount of bentazone adsorbed (mg g−1) nationallicence qe : amount of bentazone adsorbed at equilibrium (mg g−1) nationallicence S BET : apparent specific surface area obtained from the nitrogen adsorption data at −196°C by the BET model (m2 g−1) nationallicence t : time (min) nationallicence U : working electrode potential (Volts) nationallicence VCO2 : narrow micropores volume, obtained from the CO2 adsorption data at 0°C, by the DR method (cm3 g−1) nationallicence Vmeso : mesopores volume, obtained from the nitrogen adsorption data at −196°C, by the DFT method (cm3 g−1) nationallicence Vmicro : micropores volume, obtained from the nitrogen adsorption data at −196°C, by the DFT method (cm3 g−1) nationallicence VTOTAL : total pore volume obtained from the nitrogen adsorption data at −196°C, and evaluated at p/p0∼0.95 (cm3 g−1) nationallicence Ania C. CRMD, CNRS-University, 1B rue de la Férollerie, 45071, Orléans, France aut Béguin F. CRMD, CNRS-University, 1B rue de la Férollerie, 45071, Orléans, France aut Adsorption Springer US; http://www.springer-ny.com 13/5-6(2007-12-01), 579-586 0929-5607 13:5-6<579 2007 13 10450 https://doi.org/10.1007/s10450-007-9024-6 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10450-007-9024-6 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Ania C. CRMD, CNRS-University, 1B rue de la Férollerie, 45071, Orléans, France aut NATIONALLICENCE 700 1- Béguin F. CRMD, CNRS-University, 1B rue de la Férollerie, 45071, Orléans, France aut NATIONALLICENCE 773 0- Adsorption Springer US; http://www.springer-ny.com 13/5-6(2007-12-01), 579-586 0929-5607 13:5-6<579 2007 13 10450 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer