壳聚糖富集光度法测定废水中铝(Ⅲ)

Photometric Determination of Aluminium(Ⅲ) in Waste Water After Its Enrichment with Chitosan

摘要: 将壳聚糖用作填充色谱柱的吸附剂,对壳聚糖色谱柱吸附铝(Ⅲ)的最佳试验条件作了试验,并取得如下结果:① 铝(Ⅲ)柱吸附时溶液的最佳酸度为pH 5.0;② 溶液通过吸附柱达到吸附平衡所需的时间为4 h,测得静态饱和吸附量为5.26×10-4mg·L-1;③ 溶液通过吸附柱的适宜流速为1 mL·min-1;及④ 用1 mol·L-1硫酸作洗脱剂可取得最佳效果.上述铝(Ⅲ)的壳聚糖吸附富集条件成功地应用于工业废水中铝(Ⅲ)的络天青S光度测定法,方法的回收率为96.7%,方法简便.

Abstract: Chitosan was used as column filling adsorbent and used for column enrichment of Al(Ⅲ) from waste water.Optimum conditions for the adsorption of Al(Ⅲ) on chitosan were studied and the results obtained were as follows: ① acidity of sample solution: pH 5.0;② time of attaining adsorption equilibrium: 4 h;③ static saturated adsorption capacity: 5.26×10-4mg·L-1;④ flow-rate of sample solution passing through the column: 1 mL·min-1;⑤ 1 mol·L-1 H2SO4 as desorbent of Al(Ⅲ) from the column.Desorbed Al(Ⅲ) in dil.H2SO4 was determined photometrically with chromazurol S as color reagent.Test for recovery by standard addition method was performed giving a value of average recovery of 96.7%.