首页|海藻酸钠-聚乙烯醇-聚乙二醇复合膜的制备及其对Cu2+的吸附

海藻酸钠-聚乙烯醇-聚乙二醇复合膜的制备及其对Cu2+的吸附

扫码查看
采用聚乙烯醇(PVA)、聚乙二醇(PEG)对海藻酸钠(SA)进行改性,制备了一种新型高效SA-PVA-PEG复合膜.研究了该复合膜对Cu2+的吸附效果.用IR和SEM等手段对复合膜进行了表征.表征结果显示,复合膜内部存在孔状结构,有利于吸附Cu2+.实验结果表明:在初始Cu2+质量浓度50 mg/L、复合膜加入量1g/L、废水pH=5、吸附温度30℃、吸附时间60 min的最佳条件下,吸附率最高可达90.1%,吸附量达25.3 mg/g;复合膜吸附Cu2+的动力学过程可用二级动力学方程和Elovice方程进行拟合,吸附过程符合Langmuir单层吸附理论.采用浓度为1 mol/L的HCl溶液对吸附后的复合膜进行解吸,当解吸时间为2 min时,解吸率可达80.0%.
Preparation of Sodium Alginate-Polyvinyl Alcohol-Polyethylene Glycol Composite Membrane and Its Adsorption Capacity for Cu2+
Sodium alginate (SA) was modified using polyvinyl alcohol (PVA) and polyethylene glycol (PEG) to prepare a novel highly-effective SA-PVA-PEG composite membrane.The adsorption capability of the membrane for Cu2+ was studied.The membrane was characterized by IR and SEM,and the results show that there are many holes inside the membrane,which are favorable to adsorb Cu2+.The experimental results show that:Under the optimum conditions of initial Cu2+ mass concentration 50 mg/L,membrane dosage 1 g/L,wastewater pH 5,adsorption temperature 30 ℃ and adsorption time 60 min,the highest adsorption efficiency can reach 90.1%,the adsorption capacity can reach 25.3 mg/g; The dynamic process of Cu2+ adsorption on the composite membrane can be fitted by the second-order kinetics equation and Elovice equation,and the adsorption process accords with the Langmuir isotherm model.The adsorbed composite membrane can be desorbed using HC1 solution with 1 mol/L of concentration,and when the desorption time is 2 min,the desorption rate can reach 80.0%.

sodium alginatepolyvinyl alcoholpolyethylene glycolcomposite membranecopper ionadsorptionadsorption modelwastewater treatment

王婷、王玲、何娉婷、薛建军、孙瑶

展开 >

南京航空航天大学材料科学与技术学院,江苏南京210016

海藻酸钠 聚乙烯醇 聚乙二醇 复合膜 铜离子 吸附 吸附模型 废水处理

中央高校基本科研业务费专项资金项目

NS2012113

2014

化工环保
中国石化集团资产经营管理有限公司北京化工研究院,中国化工环保协会

化工环保

CSTPCDCSCD北大核心
影响因子:0.921
ISSN:1006-1878
年,卷(期):2014.34(1)
  • 4
  • 7