壳聚糖固化红树植物单宁微球对Fe^(2+)的吸附研究

Study on the Adsorption Characteristics of Chitosan-Fered Mangroves Tannin Microspheres for Fe^(2+)

以壳聚糖和红树植物单宁为原料,制备壳聚糖固化单宁微球,采用邻二氮菲分光光度法,研究其对Fe^(2+)的吸附特性。考察了时间、温度、固化微球用量、Fe^(2+)质量浓度、pH值等因素对Fe^(2+)吸附率的影响,并在单因素的基础上进行正交实验。实验结果表明,壳聚糖固化红树植物单宁微球对Fe^(2+)的吸附性能优于壳聚糖微球;当100 mL Fe^(2+)质量浓度为25 mg/L时,吸附Fe^(2+)的最佳工艺条件为:固化微球用量20 mg,吸附时间80 min,温度40℃、pH值5,吸附率达67.99%。

With chitosan and mangroves tannin as raw materials,chitosan-Fered mangroves tannin microspheres were prepared.The adsorption characteristics of Fe^(2+) on chitosan-cured mangroves tannin microspheres were studied by phenanthroline spectrophotometric method.The effects of time,temperature,amount of solidified microspheres,Fe^(2+) concentration and pH on the adsorption of Fe^(2+) were investigated,and the orthogonal experiment was carried out on the basis of single factor.The results showed that the adsorption performance of chitosan-cured mangroves tannin microspheres for Fe^(2+) was better than chitosan microspheres.When the concentration of Fe^(2+) was 25 mg/L,volume 100 mL,the optimum adsorption conditions were as follows:the dosage of immobilized microspheres was 20 mg,the adsorption time was 80 min,the temperature was 40℃,pH value 5,and the adsorption rate was 67.99%.