壳聚糖/聚苯乙烯磺酸钠复合微球的制备及其对废水中铜(Ⅱ)的吸附性能  

Preparation of chitosan/sodium polystyrene sulfonate composite microsphere and its adsorption performance for copper(Ⅱ)in wastewater

作　　者：张岩[1] 罗晓强 ZHANG Yan;LUO Xiaoqiang(Pingdingshan Polytechnic College,Pingdingshan 467000,China;Pingdingshan University,Pingdingshan 467000,China)

机构地区：[1]平顶山工业职业技术学院,河南平顶山467000 [2]平顶山学院,河南平顶山467000

出　　处：《冶金分析》2025年第3期76-83,共8页Metallurgical Analysis

基　　金：河南省化工学会课题(202241HG0035)。

摘　　要：控制壳聚糖与聚苯乙烯磺酸钠质量比为8∶1,壳聚糖与戊二醛质量比为3∶1,通过滴定-固化包裹法制备壳聚糖/聚苯乙烯磺酸钠复合微球,用扫描电子显微镜(SEM)、傅里叶变换红外光谱(FT-IR)及N2吸附/脱附等温曲线对其进行表征,并考察了其对废水中Cu(Ⅱ)的吸附性能。结果显示,冷冻干燥后的复合微球含有壳聚糖与聚苯乙烯磺酸钠,表面存在大量孔洞,比表面积较大,在复合微球质量浓度为1.0 g/L,溶液pH值为6.0,温度为30℃时对50 mL 100 mg/L模拟含铜废水中Cu(Ⅱ)吸附12 h,饱和吸附量可达167.92 mg/g;经循环5次吸附-解吸试验,复合微球的平衡吸附量为89.2 mg/g,表明该材料重复利用性较好。吸附动力学试验表明,复合微球质量浓度用量较低时(0.50 g/L),其对Cu(Ⅱ)的吸附主要为物理吸附,而质量浓度较高时(不小于1.0 g/L),主要为化学吸附,吸附过程符合Langmuir等温吸附模型特征。壳聚糖/聚苯乙烯磺酸钠复合微球对Cu(Ⅱ)具有良好的吸附性能,可作为Cu(Ⅱ)污染废水的理想处理材料。The mass ratio of chitosan to sodium polystyrene sulfonate was controlled at 8∶1,and the mass ratio of chitosan to glutaraldehyde was 3∶1.The chitosan/sodium polystyrene sulfonate composite microsphere was prepared by titration-curing packaging method.The microsphere was characterized by scanning electron microscope(SEM),Fourier transform infrared spectroscopy(FT-IR)and N2 adsorption/desorption isotherm curve.The adsorption performance for copper(Ⅱ)in wastewater was investigated.The results showed that composite microsphere after freeze drying contained chitosan and sodium polystyrene sulfonate.There were many micropores on the surface with large specific surface area.When the mass concentration of composite microsphere was 1.0 g/L,the pH of solution was 6.0,and the temperature was 30℃,the saturated adsorption capacity reached to 167.92 mg/g for copper(Ⅱ)after adsorption in 50 mL of 100 mg/L simulated copper-containing wastewater for 12 h.The equilibrium adsorption capacity of composite microsphere was still 89.2 mg/g after five recycles of adsorption-regeneration,indicating the good reusability of this material.The results of adsorption kinetics experiments showed that the adsorption of copper(Ⅱ)was mainly physical absorption when the dosage of composite microsphere was low(0.50 g/L),while it was chemical absorption when the dosage of composite microsphere was relatively high(not less than 1.0 g/L).The adsorption process conformed to the characteristics of Langmuir isotherm absorption model.The prepared chitosan/sodium polystyrene sulfonate composite microsphere had good adsorption performance for copper(Ⅱ),and it was an ideal material for the treatment of wastewater which was polluted by copper(Ⅱ).

关 键 词：聚苯乙烯磺酸钠 壳聚糖 复合微球 吸附性能 铜(Ⅱ) 废水 

分 类 号：O647.3[理学—物理化学] X703.5[理学—化学]