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以三聚磷酸钠作为离子交联剂,合成了一种掺杂聚乙烯醇的壳聚糖小球,采用SEM和FTIR表征了小球的表面性能及官能团分布情况,进一步研究了这种小球对腐殖酸和铜离子的单独吸附行为、连续吸附行为及两者共存状态下的吸附行为,并通过XPS能谱分析了吸附过程的机理.结果表明:在单独吸附过程中,壳聚糖小球与腐殖酸和铜的作用方式主要是通过静电引力和络合作用;在连续吸附过程中,先吸附了腐殖酸的小球,后续对铜离子的吸附效果变弱;而先吸附了铜离子的小球,后续对腐殖酸的吸附能力变强,说明这种小球在吸附过程中可以被连续使用.而在腐殖酸和铜离子共存的吸附实验中发现,壳聚糖小球除了会吸附溶液中的铜离子和腐殖酸外,还导致它们的聚集沉降.
Using sodium tripolyphosphate as ionic crosslinker, a chitosan-doped chitosan spheres was synthesized. The surface properties and distribution of functional groups were characterized by SEM and FTIR. The adsorption behavior of humic acid and copper ion were studied by means of XPS and XPS, respectively. The adsorption behavior of humic acid and copper ion were studied by XPS. The results showed that in the adsorption process, The interaction between the ball and the humic acid and copper is mainly through electrostatic attraction and complexation; in the continuous adsorption process, humic acid beads are adsorbed first, and then the adsorption of copper ions is weakened; Copper ion pellets, subsequent adsorption of humic acid becomes stronger, indicating that this pellet can be used continuously in the adsorption process.In the coexistence of humic acid and copper ions adsorption experiments found that small chitosan In addition to the ball will absorb the solution of copper ions and humic acid, but also lead to their settlement.