改性海藻酸钠的制备及吸附性能研究

Preparation and Adsorption Studies of Modified Sodium Alginate

以海藻酸钠为原料,氯化钙为交联剂,制备了改性海藻酸钠吸附材料。采用红外光谱(FT-IR)对改性海藻酸钠进行表征,用原子吸收光谱测定其对Cd^(2+)的吸附性能。结果表明,改性海藻酸钠成功制备。吸附性能分析表明,吸附动力学过程符合准二级动力学模型,平衡吸附量为87.87 mg/g。

Modified sodium alginate was prepared from sodium alginate by using calcium chloride as cross-linking agent. The obtained modified sodium alginate was characterized by l-burier transform infrared spectroscopy （FT-IR）. The ability of Cd^2＋ adsorption of the modified sodium alginate for removal fi＇om aqueous solutions was measured with atomic absorption spectrophotometer. It was found that modified sodium alginate was successfully assembled. The adsorption kinetics followed the mechanism of the pseudo-second-order equation, and the adsorption capacity of Cd^2＋ was 87,87 mg/g.