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采用高内相比乳液模板法合成出疏松多孔型聚丙烯腈(PAN),对其进行羟胺改性后再与Cu~(2+)配位,得到Cu~(2+)负载疏松多孔型羟胺改性聚丙烯腈(AO-PAN/Cu~(2+))。对所合成的AO-PAN/Cu~(2+)吸附剂进行了红外光谱、扫描电镜、热重分析等表征,并研究了其对As(V)的吸附性能。该吸附剂对As(V)的最大吸附量为0.22mg/g,吸附过程符合拟二级动力学方程。在竞争离子存在下,AO-PAN/Cu~(2+)对As(V)具有较高的吸附选择性。固定床实验结果表明,AO-PAN/Cu~(2+)对含量为400μg/L的含砷模拟废水中的As(V)具有良好的分离性能,穿透体积达到110BV。
Porous porous polyacrylonitrile (PAN) was synthesized by the high internal phase emulsion polymerization method, and then modified with hydroxylamine to coordinate with Cu 2+ to obtain Cu 2+ loaded loose porous hydroxylamine Modified polyacrylonitrile (AO-PAN / Cu ~ (2+)). The synthesized AO-PAN / Cu 2+ adsorbents were characterized by FTIR, SEM and TG, and their adsorption properties on As (V) were also studied. The maximum adsorption capacity of As (V) for the adsorbent is 0.22mg / g, and the adsorption process accords with the pseudo second-order kinetic equation. In the presence of competitive ions, AO-PAN / Cu 2+ has higher adsorption selectivity to As (V). The results of fixed-bed experiments showed that AO-PAN / Cu 2+ had good separation performance for As (V) in arsenic-containing simulated wastewater with a concentration of 400 μg / L, with a breakthrough volume of 110 BV.