CAJ | 학술논문

将海藻纤维与 Fe3+、Cu2+和 Ce3+3种金属离子分别进行配位反应，在考察了金属离子初始浓度和反应温度对配位能力影响的基础上，研究了不同金属离子的配位反应特性，并计算和比较了相关的动力学参数。结果表明，海藻纤维能与3种金属离子发生配位反应生成海藻纤维金属配合物，金属离子初始浓度提高可使其配合量呈线性增加。此配位反应不仅符合Langmuir和 Freundlich 等温吸附模型，而且属于一级动力学反应，升高温度能使反应速率常数增大。3种金属离子的配合量和反应速率常数依下列顺序排列：Fe3+> Cu2+> Ce3+，而其反应活化能则表现出相反趋势，说明Fe3+和 Cu2+比 Ce3+更易于与海藻纤维发生配位反应。
장해조섬유여 Fe3+、Cu2+화 Ce3+3충금속리자분별진행배위반응，재고찰료금속리자초시농도화반응온도대배위능력영향적기출상，연구료불동금속리자적배위반응특성，병계산화비교료상관적동역학삼수。결과표명，해조섬유능여3충금속리자발생배위반응생성해조섬유금속배합물，금속리자초시농도제고가사기배합량정선성증가。차배위반응불부부합Langmuir화 Freundlich 등온흡부모형，이차속우일급동역학반응，승고온도능사반응속솔상수증대。3충금속리자적배합량화반응속솔상수의하렬순서배렬：Fe3+> Cu2+> Ce3+，이기반응활화능칙표현출상반추세，설명Fe3+화 Cu2+비 Ce3+경역우여해조섬유발생배위반응。
Alginate fiber was used to coordinate with three metal ions including Fe3+,Cu2+ and Ce3+,respec-tively.Coordinating characteristics of alginate fibers with metal ions were mainly studied and the effect of tem-perature and initial concentration of metal ion on the coordination capacities of alginate fibers with metal ions was also examined.The kinetics coordination between them was examined and their kinetic parameters were also determined and compared.The results indicated that increasing the initial concentration of metal ions led to an enhanced metal ion coordinating capacities.The coordination of alginate fibers with metal ion were correlated with Langmuir and Freundlich adsorption model,and showed the better agreement with first order kinetic equa-tion.Moreover,the coordinating capacity and reaction rate constants of three metal ions with alginate fiber were ranked in the order:Fe3+> Cu2+> Ce3+,while their activation energy shows a reverse trend,suggesting that Fe3+ and Cu2+ reacted with alginate fibers more easily than Ce3+ at the same conditions.