Engineering Research Center of Biofilm Water Purification and Utilization Technology of Ministry of Education, Anhui University of Technology, Ma'anshan, Anhui 243032, China; School of Metallurgical Engineering, Anhui University of Technology, Ma'anshan, Anhui 243032, China.
Engineering Research Center of Biofilm Water Purification and Utilization Technology of Ministry of Education, Anhui University of Technology, Ma'anshan, Anhui 243032, China; School of Chemistry and Chemical Engineering, Anhui University of Technology, Ma'anshan, Anhui 243032, China.
Int J Biol Macromol. 2023 Aug 30;247:125677. doi: 10.1016/j.ijbiomac.2023.125677. Epub 2023 Jul 4.
Dyeing wastewater is a carcinogenic pollutant, which is widely known for its harmful effects on humans and marine organisms. In this study, a novel composite was prepared by blending thiourea modified chitosan with zinc sulfide nanoparticles (T-CS/ZnS) to comprehensively remove methyl orange (MO), rhodamine B (Rh B), and methylene blue (MB) effectively. Characterization results suggested that the synthesized composite has an irregular and rough surface that provided high specific surface area for adsorption process, while the strong optical response and low bandgap width contributed to the subsequent photocatalytic degradation of adsorbed dye molecules. Under optimum experimental conditions, the removal rates of MO, Rh B, and MB were 99.59 %, 99.49 %, and 91.04 %, respectively. Amino and hydroxyl groups provide electrons in photocatalytic reactions. The reaction process is consistent with the quasi-first-order kinetic model, and the material has good stability and regeneration potential. This study indicated that T-CS/ZnS composite is a highly effective material for the treatment of dyeing wastewaters.
染色废水是一种致癌污染物，其对人类和海洋生物的有害影响广为人知。在本研究中，通过将硫脲改性壳聚糖与硫化锌纳米粒子（T-CS/ZnS）共混制备了一种新型复合材料，可有效去除甲基橙（MO）、罗丹明 B（Rh B）和亚甲基蓝（MB）。表征结果表明，合成的复合材料表面不规则且粗糙，为吸附过程提供了高比表面积，而强的光学响应和低的带隙宽度有助于随后吸附的染料分子的光催化降解。在最佳实验条件下，MO、Rh B 和 MB 的去除率分别为 99.59%、99.49%和 91.04%。氨基和羟基在光催化反应中提供电子。反应过程符合准一级动力学模型，且该材料具有良好的稳定性和再生潜力。本研究表明，T-CS/ZnS 复合材料是一种处理染色废水的高效材料。
