Ania Conchi O, Béguin François
CRMD, CNRS-University, 1B rue de la Férollerie, 45071 Orléans, France.
Water Res. 2007 Aug;41(15):3372-80. doi: 10.1016/j.watres.2007.03.031. Epub 2007 May 8.
An electrochemical technique has been applied to enhance the removal of a common herbicide (bentazone) from aqueous solutions using an activated carbon cloth as electrode. A pH increase from acidic to basic reduces the uptake, with capacities going from 127 down to 80 mg/g at pH 2 and 7, respectively. Increasing the oxygen content of the carbon cloth causes a decrease in the bentazone loading capacity at all pH values. This indicates that adsorption is governed by both dispersive and electrostatic interactions, the extent of which is controlled by the solution pH and the nature of the adsorbent. Anodic polarization of the carbon cloth noticeably enhances the adsorption of bentazone, to an extent depending on the current applied to the carbon electrode. The electrosorption is promoted by a local pH decrease provoked by anodic decomposition of water in the pores of the carbon cloth.
一种电化学技术已被应用于使用活性炭布作为电极来增强从水溶液中去除一种常见除草剂（苯达松）的效果。pH值从酸性增加到碱性会降低吸附量，在pH值为2和7时，吸附容量分别从127毫克/克降至80毫克/克。增加活性炭布的含氧量会导致在所有pH值下苯达松的负载容量降低。这表明吸附受色散和静电相互作用的共同控制，其程度由溶液pH值和吸附剂的性质控制。活性炭布的阳极极化显著增强了苯达松的吸附，增强程度取决于施加到碳电极上的电流。电吸附是由活性炭布孔隙中水电解产生的局部pH值降低所促进的。
