CAJ | 학술논문

制备了一系列甘油增塑的壳聚糖膜（GLCS），利用扫描电镜（SEM）观察了膜吸附Pb2+前后的表面形貌，利用原子吸收光谱（AAS）研究了甘油含量、膜的活化方式对吸附的影响，分析了Pb2+的初始浓度、吸附温度、吸附时间等对吸附量的影响。结果表明：甘油的引入有效提高了Pb2+的吸附量；采用NaOH活化优于氨水-乙醇的活化方式；吸附行为更符合二级动力学模型和Freundlich机制，降温有利于吸附。当用1M的NaOH活化4h、Pb2+初始浓度为4075.5mg·L-1时，于pH 5.0溶液中，30℃下吸附48h后薄膜对Pb2+的吸附容量达到了221.8mg·g-1。
제비료일계렬감유증소적각취당막（GLCS），이용소묘전경（SEM）관찰료막흡부Pb2+전후적표면형모，이용원자흡수광보（AAS）연구료감유함량、막적활화방식대흡부적영향，분석료Pb2+적초시농도、흡부온도、흡부시간등대흡부량적영향。결과표명：감유적인입유효제고료Pb2+적흡부량；채용NaOH활화우우안수-을순적활화방식；흡부행위경부합이급동역학모형화Freundlich궤제，강온유리우흡부。당용1M적NaOH활화4h、Pb2+초시농도위4075.5mg·L-1시，우pH 5.0용액중，30℃하흡부48h후박막대Pb2+적흡부용량체도료221.8mg·g-1。
A series of chitosan films plasticized by glycerol (GLCS) were prepared. The morphology of GLCS was characterized by scanning electron microscopy (SEM) before and after adsorption of Pb2+ in solution. The effects of glycerol content and activation method of films on adsorption were studied by atomic absorption spectroscopy (AAS). Then the initial concentration of pb2+,temperature and adsorption time on adsorption performance were discussed. The results demonstrates that introduction of glycerol can significantly improve the adsorption capacity of Pb2+,and NaOH activation method is better than that of ammonia-ethanol. The adsorption mechanism and thermodynamic analysis shows that the adsorption behavior of Pb2+is more in line with the second-order kinetic equation and Freundlich model,and lower temperature is advantageous to the adsorption. When activated by 1M NaOH for 4h,and the initial concentration of Pb2+is 4075.5mg·L-1,the adsorbing capacity of 40%-GLCS film is up to 221.8mg·g-1,in pH 5.0 solution at 30oC after 48h.