Annabi Cyrine, Fourcade Florence, Soutrel Isabelle, Geneste Florence, Floner Didier, Bellakhal Nizar, Amrane Abdeltif
Institut des Sciences Chimiques de Rennes, Ecole Nationale Supérieure de Chimie de Rennes, Université de Rennes 1, UMR-CNRS 6226, 11 Allée de Beaulieu, CS 50837, 35708 Rennes Cedex 7, France; Centre d'Electrochimie de Nanomatériaux et Leurs Applications et de Didactique (CENAD), France; Institut National des Sciences Appliquées et de Technologie, B.P. No. 676, 1080 Tunis Cedex, Tunisia.
Institut des Sciences Chimiques de Rennes, Ecole Nationale Supérieure de Chimie de Rennes, Université de Rennes 1, UMR-CNRS 6226, 11 Allée de Beaulieu, CS 50837, 35708 Rennes Cedex 7, France; Université Européenne de Bretagne, 5 Boulevard Laënnec, 35000, France.
J Environ Manage. 2016 Jan 1;165:96-105. doi: 10.1016/j.jenvman.2015.09.018. Epub 2015 Sep 27.
This study aims to investigate the effectiveness of the electro-Fenton process on the removal of a second generation of fluoroquinolone, enoxacin. The electrochemical reactor involved a carbon-felt cathode and a platinum anode. The influence of some experimental parameters, namely the initial enoxacin concentration, the applied current intensity and the Fe(II) amount, was examined. The degradation of the target molecule was accompanied by an increase of the biodegradability, assessed from the BOD5 on COD ratio, which increased from 0 before treatment until 0.5 after 180 min of electrolysis at 50 mg L(-1) initial enoxacin concentration, 0.2 mmol L(-1) Fe(II) concentration and 300 mA applied current intensity. TOC and COD time-courses were also evaluated during electrolysis and reached maximum residual yields of 54% and 43% after 120 min of treatment, respectively. Moreover, a simultaneous generation of inorganic ions (fluorides, ammonium and nitrates) were observed and 3 short chain carboxylic acids (formic, acetic and oxalic acids) were identified and monitored during 180 min of electrolysis. By-products were identified according to UPLC-MS/MS results and a degradation pathway was proposed.
本研究旨在探究电芬顿法去除第二代氟喹诺酮类药物依诺沙星的效果。该电化学反应器包括一个碳毡阴极和一个铂阳极。研究了一些实验参数的影响，即依诺沙星初始浓度、施加的电流强度和Fe(II)用量。目标分子的降解伴随着生物降解性的提高，通过BOD5与COD的比值来评估，在初始依诺沙星浓度为50 mg L(-1)、Fe(II)浓度为0.2 mmol L(-1)、施加电流强度为300 mA的条件下电解180分钟后，该比值从处理前的0增加到0.5。在电解过程中还评估了TOC和COD随时间的变化过程，处理120分钟后，TOC和COD的最大残留率分别达到54%和43%。此外，在180分钟的电解过程中观察到同时生成了无机离子（氟化物、铵和硝酸盐），并鉴定和监测到了3种短链羧酸（甲酸、乙酸和草酸）。根据超高效液相色谱-串联质谱（UPLC-MS/MS）结果鉴定了副产物，并提出了降解途径。
