Yusaf Amnah, Usman Muhammad, Ibrahim Muhammad, Mansha Asim, Haq Atta Ul, Rehman Hafiza Fatima, Ali Majid
Department of Chemistry, Government College University, Faisalabad (38000), Pakistan; Department of Chemistry, University College London, England, UK; Department of Chemistry, Government College Women University, Faisalabad (38000), Pakistan.
Department of Chemistry, Government College University, Faisalabad (38000), Pakistan.
Chemosphere. 2023 Feb;313:137320. doi: 10.1016/j.chemosphere.2022.137320. Epub 2022 Nov 18.
In this study, micellar enhanced ultrafiltration, MEUF, being an active methodology, has been employed to remove Procion Blue MxR (PBM) from synthetic effluent. MEUF is being applied to reduce the toxicity level of aqueous system using the micellar media of cationic surfactants i.e. Cetyl trimethylammonium bromide (CTAB) and cetylpyridinium chloride (CPC). Subsequently, the effect of addition of nonionic surfactant, Triton X-100 (TX-100), on solubilizing power of cationic surfactants is investigated. The values of partition coefficient and free energy of partition reflect the extent of interaction of the dye with the surfactants. Initially molecules of pollutants i.e. dye form ion pairs with ionic surfactants and, later on, the same is incorporated within micelle. Maximum value of free energy of partition ΔG has been found to be -55.49 kJmol and -50.43 kJmol in the presence of CPC and CTAB, respectively. The size of pollutant, thus, increases and, consequently, can be easily filtered. The effect of various factors i.e. concentration of surfactant, concentration of electrolyte (NaCl), transmembrane pressure, revolutions per minute (RPM) and pH, have been investigated to find the optimum conditions for maximum removal of PBM from aqueous system. The efficiency of MEUF has been assessed by calculating the values of rejection percentage and permeate flux. Both the surfactants were observed as strong candidates for PBM encapsulation but overall, maximum rejection percentage (R%) of 96.90% was attained by CPC.
在本研究中，胶束增强超滤（MEUF）作为一种有效的方法，已被用于从合成废水中去除普施安蓝MxR（PBM）。MEUF正被应用于使用阳离子表面活性剂的胶束介质，即十六烷基三甲基溴化铵（CTAB）和十六烷基氯化吡啶（CPC）来降低水体系的毒性水平。随后，研究了添加非离子表面活性剂吐温X-100（TX-100）对阳离子表面活性剂增溶能力的影响。分配系数和分配自由能的值反映了染料与表面活性剂相互作用的程度。最初，污染物分子即染料与离子表面活性剂形成离子对，随后，染料被纳入胶束中。在存在CPC和CTAB的情况下，分配自由能ΔG的最大值分别为-55.49 kJ/mol和-50.43 kJ/mol。因此，污染物的尺寸增大，从而可以很容易地被过滤掉。研究了各种因素，即表面活性剂浓度、电解质（NaCl）浓度、跨膜压力、每分钟转数（RPM）和pH值，以找到从水体系中最大程度去除PBM的最佳条件。通过计算截留率和渗透通量的值来评估MEUF的效率。两种表面活性剂都被视为封装PBM的有力候选者，但总体而言，CPC获得的最大截留率（R%）为96.90%。
