Oil & Gas Field Applied Chemistry Key Laboratory of Sichuan Province, College of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu 610500, China.
Oil & Gas Field Applied Chemistry Key Laboratory of Sichuan Province, College of Chemistry and Chemical Engineering, Southwest Petroleum University, Research Institute of Industrial Hazardous Waste Disposal and Resource Utilization, Southwest Petroleum University, Chengdu 610500, China E-mail:
Water Sci Technol. 2021 May;83(9):2192-2206. doi: 10.2166/wst.2021.129.
Modifying environmentally harmful waste polystyrene foam as an efficient recyclable adsorbent for organic dyes is important. Amidation modified polystyrene (PS-SD) was prepared by the Friedel-Crafts reaction and N,N'-dicyclohexylcarbodiimide (DCC) dehydration condensation reaction of waste polystyrene foam. PS-SD had highly efficient removal performance for organic dyes in large volume water sample solutions, and equilibrium was achieved in 0.5 h. The maximum adsorption capacities for Methylene blue (MB) and Congo red (CR) were 881.62 and 1,880.91 mg/g, respectively, at room temperature according to the Langmuir adsorption isotherm (R > 0.99). The kinetic data of the two dyes followed pseudo-second-order kinetics. The removal percentage remained high (>85%) after eight filtration-regeneration cycles. Experimental results showed that PS-SD was an excellent adsorbent for water treatment with high recyclability and long life.
将对环境有害的废聚苯乙烯泡沫改性为高效可回收的有机染料吸附剂非常重要。通过废聚苯乙烯泡沫的傅-克反应和 N,N'-二环己基碳二亚胺（DCC）脱水缩合反应制备了酰胺化改性聚苯乙烯（PS-SD）。PS-SD 对大体积水样溶液中的有机染料具有高效的去除性能，在 0.5 h 内达到平衡。根据 Langmuir 吸附等温线（R>0.99），室温下 PS-SD 对亚甲蓝（MB）和刚果红（CR）的最大吸附容量分别为 881.62 和 1880.91 mg/g。两种染料的动力学数据均遵循准二级动力学。经过八次过滤-再生循环后，去除率仍保持在 85%以上。实验结果表明，PS-SD 是一种具有高可回收性和长寿命的水处理用高效吸附剂。
