磁性PLA-Fe_3O_4复合微球制备及其对茜素红的脱除研究  

Preparation of magnetic PLA-Fe_3O_4 composite microspheres and its behaviors for adsorption of alizarin red

作　　者：杨菊香[1] 严向阳[2] 王旅[1] 

机构地区：[1]西安文理学院化学与化学工程学院,陕西西安710065 [2]陕西师范大学化学与化工学院,陕西西安710062

出　　处：《陕西师范大学学报（自然科学版）》2013年第5期50-54,共5页Journal of Shaanxi Normal University：Natural Science Edition

基　　金：国家自然科学基金资助项目(21303135);陕西省自然科学基础研究计划项目(2013JQ2027);西安文理学院重大科研基金项目(ZD201002);陕西省教育厅科学研究计划项目(2013JK0688)

摘　　要：采用化学共沉淀法制备了纳米级Fe3O4磁性粒子,以油酸钠改性后的磁性Fe3O4粒子作为模板,以一次性聚乳酸(PLA)饭盒作为聚乳酸原料,采用溶剂扩散法制备了磁性PLA-Fe3O4复合微球.利用扫描电镜、红外光谱仪及热重分析仪对所得产物的形貌、组成和含量进行了表征.以茜素红(AR)模拟染料废水,探讨了磁性PLA-Fe3O4复合微球对染料茜素红的脱除效率,研究了吸附时间,磁性PLA-Fe3O4复合微球的用量,溶液的pH及溶液的初始浓度等因素对茜素红脱除效率的影响.结果表明:磁性PLA-Fe3O4复合微球的用量为25mg、pH为4.3、吸附时间为2h、溶液起始浓度为19mg/L时吸附率可达90%以上.The magnetic Fe3O4 particles were prepared by co-precipitation method, and modified by sodium oleicate. Using the prepared Fe3O4 pareicles and PLA from disposable tablewares, the magnetic PLA-Fe3O4 composite microspheres were fabricated by using solvent diffuse method. The morphology and composition of the composite microspheres were investigated by Scanning Electron Microscopy （ SEM ）, Fourier Transform Infrared Spectroscopy （ FT-IR ）, Thermogravimetric Analysis （TGA）. The experiments were carried out that the alizarin red pigment was removed from water by the prepared microspheres, the effects of pH, the dosage of the microspheres, the initial concentration of the alizarin red and the time of absorption on the removing efficiency were invistigated. The results show that the optimum conditions are as follows, the pH of solution： 4. 3, the amount of the microspheres. 25 mg, the time of absorption.. 2 h and the initial concentration of the solution. 19 mg/L. In optimum condition,the removing ratio can reach to 90%.

关 键 词：磁性Fe3O4复合微球 聚乳酸 茜素红 吸附率 染料废水 

分 类 号：TQ31[化学工程—高聚物工业]