CAJ | 학술논문

研究了含C-N键的氨基淀粉（CAS）与含CN键的氨基淀粉（DAS）对重金属离子Cu2＋的吸附性能，包括吸附动力学、吸附等温线和吸附热力学。结果表明CAS比DAS的吸附容量更大，Cu2＋去除率更高；CAS适用的pH为5～7，DAS适用的pH为4～4．5；两者对Cu2＋的吸附均符合拟二级动力学；CAS对Cu2＋等温吸附符合Freundlich型，为非均相表面吸附；DAS吸附则是单层吸附；两种氨基淀粉对Cu2＋的吸附过程均为吸热、熵增、自发的过程。
연구료함C-N건적안기정분（CAS）여함CN건적안기정분（DAS）대중금속리자Cu2＋적흡부성능，포괄흡부동역학、흡부등온선화흡부열역학。결과표명CAS비DAS적흡부용량경대，Cu2＋거제솔경고；CAS괄용적pH위5～7，DAS괄용적pH위4～4．5；량자대Cu2＋적흡부균부합의이급동역학；CAS대Cu2＋등온흡부부합Freundlich형，위비균상표면흡부；DAS흡부칙시단층흡부；량충안기정분대Cu2＋적흡부과정균위흡열、적증、자발적과정。
The adsorption properties of amino starch with C-N ligand (CAS) were compared with amino starch with CN ligand (DAS ) for Cu2+ removal from aqueous solution. Furthermore, the adsorption kinetics, adsorption isotherms and adsorption thermodynamics of these two amino starches were also studied. The results show CAS has better removal efficiency and higher adsorption capacity for Cu2+;the adsorption capacity of CAS reaches the maximum when pH is 5 ~7,and that of DAS reaches maximum when pH is 4~4. 5;both of them follow the pseudo-second-order kinetic model. The adsorption equilibrium data of CAS are correlated well with Freundlich isotherm while those of DAS are more fitted with Langmuir isotherm,which means the surface of CAS is heterogeneous and that of DAS is monolayer and homogeneous. The adsorption of Cu2+on two amino starches is spontaneous and endothermic processes with increased entropy.