污水处理厂中的许多药品和个人护理产品去除不良导致其排放到接收水域,它们可能对水生环境和生物造成负面影响。在这项研究中,电化学去除工艺已被用作去除甲芬那酸(MEF)的替代方法。对于我们的知识,使用电化学方法去除MEF尚未报道。甲芬那酸初始浓度的影响,氯化钠(NaCl),和施加电压进行了评估,以提高电化学处理过程的效率,并了解该过程中消耗了多少电能。去除百分比(R%)介于44%和97%之间,取决于操作参数,0.1gNaCl为9.1%。在2mg/L甲芬那酸下50分钟后,消耗能量为0.224Wh/mg,0.5克NaCl,使用7V的高施加电压观察到高消耗能量(0.433Wh/mg)。通过Bruker软件数据分析使用液相色谱-飞行时间质谱提供转化产物的研究和阐明。电化学处理20分钟后,研究了七个氯化和两个非氯化转化产物。然而,140分钟后消除所有转化产物(TP)。为了评估毒性,它受到转化产物形成的影响,特别是在20和60分钟之间,然后大肠杆菌细菌的抑制百分比在80分钟后降低到最低值。
Poor removal of many pharmaceuticals and personal care products in sewage treatment plants leads to their discharge into the receiving waters, where they may cause negative effects for aquatic environment and organisms. In this study, electrochemical removal process has been used as alternative method for removal of mefenamic acid (MEF). For our knowledge, removal of MEF using electrochemical process has not been reported yet. Effects of initial concentration of mefenamic acid, sodium chloride (NaCl), and applied voltage were evaluated for improvement of the efficiency of electrochemical treatment process and to understand how much electric energy was consumed in this process. Removal percentage (R%) was ranged between 44 and 97%, depending on the operating parameters except for 0.1 g NaCl which was 9.1%. Consumption energy was 0.224 Wh/mg after 50 min at 2 mg/L of mefenamic acid, 0.5 g NaCl, and 5 V. High consumption energy (0.433 Wh/mg) was observed using high applied voltage of 7 V. Investigation and elucidation of the transformation products were provided by Bruker software dataAnalysis using liquid chromatography-time of flight mass spectrometry. Seven chlorinated and two non-chlorinated transformation products were investigated after 20 min of electrochemical treatment. However, all transformation products (TPs) were eliminated after 140 min. For the assessment of the toxicity, it was impacted by the formation of transformation products especially between 20 and 60 min then the inhibition percentage of E. coli bacteria was decreased after 80 min to be the lowest value.