Department of Chemistry, Government College University, Faisalabad 38000, Pakistan.
Department of Chemistry, University College London, London WC1E 6BT, UK.
Molecules. 2022 Sep 29;27(19):6436. doi: 10.3390/molecules27196436.
In this manuscript, the application of cetyltrimethylammonium bromide (CTAB) and cetylpyridinium chloride (CPC) for the removal of Naphthol Green B (NGB) as a synthetic effluent has been studied. The solubilization of NGB by a single and mixed micellar system using Triton X-100 (TX-100) as a nonionic surfactant has been performed to establish both the extent of the partitioning (k) of NGB and ultimately their respective Gibbs free energies ΔG as well. An applied methodology, micellar-enhanced ultrafiltration (MEUF), has also been studied in different micellar media of cationic surfactants by variation in some selective parameters, such as the concentration of surfactant, electrolyte, pressure, pH, and RPM to obtain optimum conditions. The results have been analyzed by a UV/visible double beam spectrophotometer. ΔG was found to be -39.65 kJ/mol and -47.94 kJ/mol by CTAB and CPC, respectively, in the presence of a nonionic surfactant. The maximum value of Gibbs free energy (ΔG) of the partition was obtained by CPC. The values of the rejection coefficient (R%) and permeate flux (J) are also calculated. A maximum removal of 99.77% and 98.53% by CTAB and CPC, respectively, was obtained. It has been observed that both of the surfactants are strong candidates for NGB removal.
本文研究了十六烷基三甲基溴化铵（CTAB）和十六烷基氯化吡啶（CPC）在去除萘酚绿 B（NGB）作为合成废水方面的应用。使用非离子表面活性剂 Triton X-100（TX-100）对 NGB 的单一和混合胶束体系的增溶作用进行了研究，以确定 NGB 的分配程度（k），并最终确定它们各自的吉布斯自由能ΔG。还研究了在不同阳离子表面活性剂胶束介质中应用的胶束增强超滤（MEUF）方法，通过改变一些选择性参数，如表面活性剂、电解质、压力、pH 值和 RPM，以获得最佳条件。结果通过紫外/可见双光束分光光度计进行分析。在非离子表面活性剂存在下，CTAB 和 CPC 的ΔG 分别为-39.65 kJ/mol 和-47.94 kJ/mol。CPC 获得了最大的分配吉布斯自由能（ΔG）值。还计算了截留系数（R%）和渗透通量（J）的值。通过 CTAB 和 CPC 分别获得了 99.77%和 98.53%的最大去除率。结果表明，两种表面活性剂都是去除 NGB 的有力候选物。
