摘要
采用溶液共混法-冷冻干燥法制备了氧化石墨烯(GO)和氧化石墨烯/聚乙烯亚胺复合材料(GO/PEI),探讨了pH值、吸附剂加入量、温度、时间及Cu(Ⅱ)初始浓度对GO和GO/PEI吸附Cu(Ⅱ)效果的影响。研究结果表明,GO和GO/PEI均可高效吸附Cu(Ⅱ),投入0.5 g/L的吸附剂吸附50 mg/L的Cu(Ⅱ),在318 K下吸附200 min,pH值为5.5时,GO和GO/PEI的吸附量可达60.36 mg/g和79.70 mg/g。Langmuir等温吸附模型和准二级动力学模型可较好地拟合其吸附过程,GO和GO/PEI对Cu(Ⅱ)的吸附是自发的吸热反应。综合对比GO和GO/PEI对Cu(Ⅱ)的吸附性能,GO/PEI的吸附效果更佳。
Graphene oxide(GO) and graphene oxide/polyethylene imine composites(GO/PEI) were prepared by solution blending and freeze-drying method. The effects of pH value, adsorbent amount,temperature, time and initial concentration of Cu(Ⅱ) on Cu(Ⅱ) adsorption by GO and GO/PEI were investigated. The results showed that both GO and GO/PEI can adsorb Cu(Ⅱ) efficiently. The adsorption capacity of GO and GO/PEI can reach 60.36 mg/g and 79.70 mg/g when pH value was 5.5and 0.5 g/L adsorbent was used to adsorb 50 mg/L Cu(Ⅱ) at 318 K for 200 min. Langmuir isothermal adsorption model and pseudo-second-order kinetic model can fit the adsorption process of Cu(Ⅱ)well. The adsorption of Cu(Ⅱ) by GO and GO/PEI was a spontaneous endothermic reaction. By comparing the adsorption properties of GO and GO/PEI for Cu(Ⅱ), the adsorption effect of GO/PEI was better.
作者
梁永贤
姚庆达
许春树
王小卓
周松喜
官志坚
LIANG Yongxian;YAO Qingda;XU Chunshu;WANG Xiaozhuo;ZHOU Songxi;GUAN Zhijian(Weizheng Intellectual Property Technology Co.,Ltd.,Shenzhen 518000,China;Xingye Leather Technology Co.,Ltd.,Jinjiang 362200,China;Jinjiang Testing Institute of Quality and Metrology,Jinjiang 362200,China)
出处
《皮革与化工》
CAS
2023年第1期1-8,共8页
Leather And Chemicals
