探讨了磁场作用下壳聚糖（CS）及其改性后的苯甲醛希夫碱（SB）对铅离子的吸附特性,研究了磁场强度、磁场处理时间、铅离子溶液的酸度等因素对吸附铅离子的影响。结果发现400kA/m的磁场辅助下,壳聚糖和希夫碱的吸附率和吸附量在磁场处理前后分别最少增强了6.43%和3.34%,0.1928和0.1003mg/g。而达到吸附饱和的时间均缩短了40%。用经典的等温方程对壳聚糖和希夫碱对Pb（Ⅱ）的吸附平衡数据进行拟合,实验结果表明吸附行为与Langmuir和Frundlich两种吸附等温方程式均有较好的相关性。揭示了适当的磁场处理可强化壳聚糖及其希夫碱对金属离子的吸附。
In this paper,adsorption characteristics of SB,synthesized by condensation of chitosan（CS） with benzaldehyde,for lead ion in the magnetic field were discussed.The effects of magnetic field intensity,treated time of magnetic field,pH of Pb（Ⅱ） solution on the adsorption were investigated.It has been found that adsorption rate and adsorption capacity of CS and SB increases at least 6.43% and 3.34%,0.1928mg/L and 0.1003mg/L after assisted by 400kA/m magnetic field.The time of adsorption saturation both reduced by 40%.The experimental data fit well into the Langmuir and Frundlich adsorption isotherm.This study reveals the appropriate magnetic field can enhance the adsorption of chitosan and its Schiff base for metal ions.
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