中文摘要：

以海藻酸纤维作为吸附材料研究了纤维对水溶液中Fe^3＋的吸附性能，用准一级动力学方程、准二级动力学方程、Elovich方程、粒子扩散方程、双常数方程和指数函数方程数学模型对不同Fe^3＋浓度、吸附时间的吸附曲线进行分析，研究了其吸附的动力学机理。结果表明：在研究的浓度和条件范围内，准二级动力学模型、Elovich方程和双常数方程的拟合度较好，模拟值与实验值吻合较好，说明海藻酸纤维吸附Fe^3＋是复杂的非均相扩散的化学吸附过程。粒子扩散方程表明颗粒内扩散不是控制海藻酸纤维吸附Fe^3＋过程的唯一步骤，而是由膜扩散和颗粒内扩散联合控制。

英文摘要：

The adsorption property of alginic acid fiber for Fe^3＋ in aqueous solution were studied. The adsorption curves were analyzed at different Fe^3＋ concentration and adsorption time using Lagergren-first order kinetic equation, Lagergren-second order kinetic equation, Elovich equation, intraparticular diffusion equation, double constant euqation and index function equation. The kinetic adsorption mechanism was studied. The results showed that the Lagergren-second-order equations, Elovich equation and double constant equation were fit well and a good agreement between the calculated and experimental data was obtained, which indicated that the adsorption of Fe^3＋ on alginic acid fiber is a complex heterogeneous diffusion chemical adsorption process. The intraparticular diffusion equation indicated that the adsorption rate of Fe^3＋ on alginic acid fiber was not controlled by the intraparticle diffusion only, but by the combination of film diffusion and intraparticle diffusion.