化学工程
化學工程
화학공정
CHEMICAL ENGINEERING
2014年
7期
22-27,41
,共7页
曾坚贤%陈华俊%刘国清%喻谢%钱朝辉
曾堅賢%陳華俊%劉國清%喻謝%錢朝輝
증견현%진화준%류국청%유사%전조휘
表面印迹%动态吸附%铜离子%壳聚糖%三氧化二铝
錶麵印跡%動態吸附%銅離子%殼聚糖%三氧化二鋁
표면인적%동태흡부%동리자%각취당%삼양화이려
surface ion-imprinted%dynamic adsorption%copper ion%chitosan%aluminium oxide
以表面接枝和表面印迹技术为基础，采用正硅酸乙酯改性的Al2 O3为载体，壳聚糖为功能单体，制备了一种新型Cu2＋印迹壳聚糖/Al2 O3复合材料（IIP/Al2 O3），以傅里叶变换红外表征了IIP/Al2 O3，发现Cu2＋印迹壳聚糖被有效接枝到Al2 O3表面。考察填充柱入口Cu2＋质量浓度、柱高、流速和pH值对IIP/Al2 O3柱动态吸附性能的影响，研究动态吸附模型，结果表明：当填充柱入口Cu2＋质量浓度为100 mg/L、柱高为37．25 mm、流速为1．0 mL/min和pH值为5时，IIP/Al2O3柱穿透吸附量和平衡吸附量分别为4．03和15．68 mg/g，吸附平衡时间为215 min，穿透时间为31 min，吸附行为符合Thomas模型，理论平衡吸附量为15．76 mg/g，Thomas常数为0．3429×10-3 L/（mg· min）。研究IIP/Al2 O3柱的选择性分离特性和稳定性，发现IIP/Al2 O3柱对Cu2＋吸附率远高于竞争离子Ni2＋和Zn2＋，经5次吸附-洗脱后，穿透吸附量及平衡吸附量仅分别下降5．2％和3．0％。
以錶麵接枝和錶麵印跡技術為基礎，採用正硅痠乙酯改性的Al2 O3為載體，殼聚糖為功能單體，製備瞭一種新型Cu2＋印跡殼聚糖/Al2 O3複閤材料（IIP/Al2 O3），以傅裏葉變換紅外錶徵瞭IIP/Al2 O3，髮現Cu2＋印跡殼聚糖被有效接枝到Al2 O3錶麵。攷察填充柱入口Cu2＋質量濃度、柱高、流速和pH值對IIP/Al2 O3柱動態吸附性能的影響，研究動態吸附模型，結果錶明：噹填充柱入口Cu2＋質量濃度為100 mg/L、柱高為37．25 mm、流速為1．0 mL/min和pH值為5時，IIP/Al2O3柱穿透吸附量和平衡吸附量分彆為4．03和15．68 mg/g，吸附平衡時間為215 min，穿透時間為31 min，吸附行為符閤Thomas模型，理論平衡吸附量為15．76 mg/g，Thomas常數為0．3429×10-3 L/（mg· min）。研究IIP/Al2 O3柱的選擇性分離特性和穩定性，髮現IIP/Al2 O3柱對Cu2＋吸附率遠高于競爭離子Ni2＋和Zn2＋，經5次吸附-洗脫後，穿透吸附量及平衡吸附量僅分彆下降5．2％和3．0％。
이표면접지화표면인적기술위기출，채용정규산을지개성적Al2 O3위재체，각취당위공능단체，제비료일충신형Cu2＋인적각취당/Al2 O3복합재료（IIP/Al2 O3），이부리협변환홍외표정료IIP/Al2 O3，발현Cu2＋인적각취당피유효접지도Al2 O3표면。고찰전충주입구Cu2＋질량농도、주고、류속화pH치대IIP/Al2 O3주동태흡부성능적영향，연구동태흡부모형，결과표명：당전충주입구Cu2＋질량농도위100 mg/L、주고위37．25 mm、류속위1．0 mL/min화pH치위5시，IIP/Al2O3주천투흡부량화평형흡부량분별위4．03화15．68 mg/g，흡부평형시간위215 min，천투시간위31 min，흡부행위부합Thomas모형，이론평형흡부량위15．76 mg/g，Thomas상수위0．3429×10-3 L/（mg· min）。연구IIP/Al2 O3주적선택성분리특성화은정성，발현IIP/Al2 O3주대Cu2＋흡부솔원고우경쟁리자Ni2＋화Zn2＋，경5차흡부-세탈후，천투흡부량급평형흡부량부분별하강5．2％화3．0％。
Taking Al2 O3 modified with tetraethylorthosilicate as carrier material, and chitosan as functional monomer,a novel copper ion imprinted chitosan/aluminium oxide (IIP/Al2 O3 )was prepared based on the surface-grafted and surface imprinting technologies.The IIP/Al2 O3 was characterized by using the Fourier transform infrared spectroscopy.The results show that copper ion imprinted chitosan is grafted successfully on the surface of Al2 O3 .The effects of Cu2+inlet mass concentration,column height,flow rate and pH value on the dynamic adsorption of Cu2+on IIP/Al2 O3 were investigated.The model for dynamic adsorption of Cu2+on IIP/Al2 O3 was studied.The results indicate that when Cu2+inlet mass concentration is 100 mg/L,column height is 37.25 mm, flow rate is 1 .0 mL/min and pH value is 5 ,the breakthrough capacity and dynamic adsorption capacity of the IIP/Al2O3 are 4.03 mg/g and 15.68 mg/g,respectively,and equilibrium time and breakthrough time are 215 min and 3 1 min,respectively.Thomas model is suitable for the description of dynamic adsorption of the IIP/Al2 O3 .The theoretical adsorption capacity of the IIP/Al2O3 is 15.76 mg/g,and Thomas constant is 0.342 9 ×10 -3 L/(mg· min).The selectivity and stability of IIP/Al2 O3 were studied further.The IIP/Al2 O3 showed good characteristics, such as high selectivity and good reusability.The adsorption percentage of Cu2+on IIP/Al2 O3 was higher than that of Ni2+or Zn2+on IIP/Al2 O3 .After the adsorption-desorption cycles were repeated 5 times,the breakthrough capacity and dynamic adsorption capacity were decreased only by 5 .2% and 3 .0%,respectively.
