Institute of Nanoscience and Nanotechnology (ION2), Universiti Putra Malaysia, 43400, Serdang, Selangor, Malaysia.
Department of Chemistry, Faculty of Science, Universiti Putra Malaysia, 43400, Serdang, Selangor, Malaysia.
Environ Monit Assess. 2023 Oct 12;195(11):1303. doi: 10.1007/s10661-023-11909-z.
Calix[4]arene/polyurethane (C4PU) has been synthesized and characterized as an alternative adsorbent for the adsorption of methylene blue (MB) and malachite green (MG) dyes from the aqueous solution. C4PU was synthesized by reacting p-tert-butyl calix[4]arene with hexamethylene diisocyanate (HMDI) as the cross-linking agent. Different polymer ratios were synthesized, and C4PU-4 shows better adsorption than other ratios. The polymer was characterized by Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), Brunauer-Emmett-Teller (BET) analysis, and point of zero charges (pH). The isotherms and kinetics of the adsorption of MB and MG were studied under a range of experimental conditions, including pH, adsorbent dosage, initial dye concentration, and contact time. The adsorption was determined by the adsorption percentage of MB and MG dyes from the solution. The Langmuir isotherm model best describes the adsorption process for both dyes, and it follows a pseudo-second-order kinetic model, with the maximum adsorption capacity (q) of MB and MG, respectively, was found to be 1.991 mg·g and 2.240 mg·g.
冠醚/聚氨酯（C4PU）已被合成并表征为一种替代吸附剂，用于从水溶液中吸附亚甲蓝（MB）和孔雀石绿（MG）染料。C4PU 通过 p-叔丁基杯[4]芳烃与六亚甲基二异氰酸酯（HMDI）反应合成，HMDI 作为交联剂。合成了不同的聚合物比，C4PU-4 的吸附性能优于其他比例。通过傅里叶变换红外光谱（FTIR）、热重分析（TGA）、BET 分析和零电荷点（pH）对聚合物进行了表征。在一系列实验条件下研究了 MB 和 MG 吸附的等温线和动力学，包括 pH、吸附剂用量、初始染料浓度和接触时间。吸附通过从溶液中吸附 MB 和 MG 染料的百分比来确定。Langmuir 等温线模型最能描述两种染料的吸附过程，它遵循准二级动力学模型，MB 和 MG 的最大吸附容量（q）分别为 1.991mg·g 和 2.240mg·g。
