Doan Linh, Nguyen Tam T T, Tran Khoa, Huynh Khanh G
Department of Chemical Engineering, International University-Vietnam National University, Ho Chi Minh City 70000, Vietnam.
Nanomaterials Engineering Research & Development (NERD) Laboratory, International University-Vietnam National University, Ho Chi Minh City 70000, Vietnam.
Polymers (Basel). 2024 Jun 27;16(13):1839. doi: 10.3390/polym16131839.
Due to the negative impacts the dye may have on aquatic habitats and human health, it is often found in industrial effluent and poses a threat to public health. Hence, to solve this problem, this study developed magnetic adsorbents that can remove synthetic dyes like methylene blue. The adsorbent, in the form of beads, consists of a polymer blend of chitosan, polyethylene glycol, polyvinyl alcohol, polyvinylpyrrolidone, and superparamagnetic iron oxide nanoparticles (average size of 19.03 ± 4.25 nm). The adsorption and desorption of MB from beads were carried out at pH values of 7 and 3.85, respectively. At a concentration of 9 mg/L, the loading capacity and the loading amount of MB after 5 days peaked at 29.75 ± 1.53% and 297.48 ± 15.34 mg/g, respectively. Meanwhile, the entrapment efficiency of MB reached 29.42 ± 2.19% at a concentration of 8 mg/L. The cumulative desorption capacity of the adsorbent after 13 days was at its maximum at 7.72 ± 0.5%. The adsorption and desorption kinetics were evaluated.
由于该染料可能对水生栖息地和人类健康产生负面影响，它经常出现在工业废水中，对公众健康构成威胁。因此，为了解决这个问题，本研究开发了能够去除亚甲基蓝等合成染料的磁性吸附剂。该吸附剂呈珠状，由壳聚糖、聚乙二醇、聚乙烯醇、聚乙烯吡咯烷酮和超顺磁性氧化铁纳米颗粒（平均尺寸为19.03±4.25纳米）的聚合物混合物组成。MB从珠子上的吸附和解吸分别在pH值为7和3.85的条件下进行。在浓度为9 mg/L时，5天后MB的负载容量和负载量分别达到峰值，为29.75±1.53%和297.48±15.34 mg/g。同时，在浓度为8 mg/L时，MB的包封效率达到29.42±2.19%。13天后吸附剂的累积解吸容量最大，为7.72±0.5%。对吸附和解吸动力学进行了评估。
