Yen Doan Thi Hai, Van Dang Long, Trang Truong Thi Thuy, Vu Thi Ngan, Le Thanh Son, Thu Nguyen Thi Minh, Nguyen Minh Ngoc, Pham Thu Thao, Yusa Shin-Ichi, Pham Tien Duc
Faculty of Chemistry, University of Science, Vietnam National University, Hanoi, 19 Le Thanh Tong, Hoan Kiem, Hanoi, 100000, Vietnam.
Faculty of Chemistry, University of Science, Vietnam National University, 19 Le Thanh Tong, Hoan Kiem, Hanoi, 100000, Vietnam.
Chem Asian J. 2023 Sep 1;18(17):e202300404. doi: 10.1002/asia.202300404. Epub 2023 Jul 27.
Highly positively charged poly(vinyl benzyl trimethylammonium chloride) (PVBMA) was successfully synthesized with approximately 82% of yield. The PVBMA was characterized by the molecular weight (M ) of 343.45 g mol and the molecular weight distribution, (Đ) of 2.4 by H NMR and SEC measurements. The PVBMA was applied as an effective agent for α-Al O surface modification in the adsorptive removal of the azo dye acid orange G (AOG). The AOG removal performance was significantly enhanced at all pH compared to without surface modification. The experimental parameters were optimal at pH 8, free ionic strength, 15 min of adsorption time, and 5 mg mL α-Al O adsorbents. The AOG adsorption which was mainly controlled by the PVBMA-AOG electrostatic attractions was better applicable to the Langmuir isotherm and the pseudo-second kinetic model. The PVBMA-modified α-Al O demonstrates a high-performance and highly reusable adsorbent with great AOG performances of approximately 90.1% after 6 reused cycles.
成功合成了带高度正电荷的聚（乙烯基苄基三甲基氯化铵）（PVBMA），产率约为82%。通过核磁共振氢谱（¹H NMR）和尺寸排阻色谱（SEC）测量对PVBMA进行表征，其分子量（M）为343.45 g·mol，分子量分布（Đ）为2.4。PVBMA作为一种有效试剂用于α-Al₂O₃表面改性，以吸附去除偶氮染料酸性橙G（AOG）。与未进行表面改性相比，在所有pH值下，AOG的去除性能均显著提高。实验参数在pH为8、自由离子强度、吸附时间15分钟和5 mg·mL的α-Al₂O₃吸附剂时达到最佳。主要由PVBMA-AOG静电引力控制的AOG吸附更符合朗缪尔等温线和准二级动力学模型。PVBMA改性的α-Al₂O₃是一种高性能且可高度重复使用的吸附剂，在6次重复循环后对AOG的去除性能约为90.1%，表现出色。
