壳聚糖/明胶微球吸附脱色剂的制备

Preparation of adsorbent with chitosan/gelatin composite microspheres

以壳聚糖和明胶为原料,戊二醛为交联剂,采用反相悬浮乳液聚合法制备壳聚糖/明胶微球,可作为染液废水吸附剂。扫描电镜显示,微球粒径均匀,平均约20μm;红外光谱数据则证明壳聚糖、明胶与戊二醛之间发生了交联。复合微球对染液中酸性红337的吸附性能试验表明,当染料质量浓度0.5 g/L,复合微球质量浓度0.5 g/L时,吸附率可达到98%;复合微球吸附的最佳条件是:pH值2～3,吸附时间100 min,温度30℃。

Chitosan-gelatin composite microspheres,as dye wastewater adsorbent, are prepared by inverse suspension poly-merization, using chitosan （CS） and gelatin as raw material,glutaraldehyde as cross-linking agent. The SEM （scanning electron microscope） micrographs show that the particle size of microspheres is uniform with 20μm in diameter. The data of FTIR spectra indicate that the cross-linking between chitosan-gelatin and glutaraldehyde is occurred. The adsorption characteristics of acid red 337 by chitosan-getatin composite microshperes are investigated. The experimental results show that the maximum adsorption rate can reach 98% under dye concentration 0.5 g/L, composite microspheres concentration 0. 5 g/L. The optimum absorption conditions of composite microspheres are pH 2-3,adsorption at 30 ℃ for 100 min.