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用甲醛、氢氧化钠、过氧化氢、盐酸等改性剂对油茶果壳进行改性制成吸附材料,并研究了其对稀土金属离子Dy(Ⅲ)的吸附行为.考察了改性条件、Dy(Ⅲ)的初始质量浓度、吸附时间等对改性油茶果壳吸附性能的影响,比较了线性和非线性回归方法估计吸附等温线参数的差异.结果表明:改性条件对吸附材料的性能影响大,盐酸改性的油茶果壳对Dy(Ⅲ)的最大吸附量可达939.0 mg·g-1,且其等温吸附行为符合Freundlich方程,吸附动力学过程符合准二级速度方程.非线性回归方程拟合的吸附等温线具有更大的相关性.
Adsorption materials were modified with formaldehyde, sodium hydroxide, hydrogen peroxide, hydrochloric acid and other modifiers to study the adsorption behavior of rare earth metal ions Dy (Ⅲ). The effects of modification conditions, Dy (Ⅲ) initial concentration and adsorption time on the adsorption properties of modified camellia husk were compared.The linear and nonlinear regression methods were used to estimate the difference of adsorption isotherm parameters.The results showed that: the performance of the adsorption material The maximal adsorption capacity of Dyestuffs on the hull of Camellia oleifera modified by hydrochloric acid was up to 939.0 mg · g-1, and the isotherm adsorption behavior accorded with Freundlich equation, and the adsorption kinetics was in accordance with quasi-second-order velocity equation. The regression equation fitted with the adsorption isotherm has a greater correlation.