壳聚糖改性膨润土的制备及其对活性嫩黄的吸附性能研究

通过对壳聚糖（CTS）改性膨润土的制备（改性土）及对活性嫩黄印染废水吸附性能研究,探讨了壳聚糖量、醋酸体积分数等因素,制得改性土以及改性土用量、染料质量浓度、介质的pH等对吸附性能的影响.结果表明：随着壳聚糖量的增加,吸附量逐渐增大,达到最大值后逐渐减小；醋酸体积分数为1％时制备的壳聚糖改性土吸附效果最好.随着改性土用量的增大,吸附量逐渐减小；吸附量随活性嫩黄染料质量浓度的增加而增加.壳聚糖量为0.089 g、醋酸体积分数1％、改性土用量0.600 g,吸附效果最好.吸附试验符合Arrhenius方程模型,并通过XRD分析结果证实了改性土的制备.

The preparationof chitosan modified bentonite and its application on reactive yellow adsorption

The preparation of chitosan modified bentonite and its adsorption on reactive yellow dye from waste water were studied. The effects of chitosan mass,acetic acid volume fraction,the dosage of modi- fied soil,dye concentration and pH on the adsorption performance were investigated. Results show that with the increment of chitosan, the adsorption quantity increases gradually, and then decreases after reaching a maximum; The best adsorption performance was achieved when the volume fraction of acetic acid for preparing chitosan modified bentonite was 1% （v/v）. Adsorption capacity increases as reactive yellow dye concentration increases and decreases gradually with the rising of the dosage of modified soil. Conclusion is that：adsorption effect is the best when chitosan dosage is 0. 089 g,aeetie acid volume fraction 1% （v/v） ,dosage of modified soil 0.6 g. Its adsorption behavior conforms to the equation of Arrhenius. XRD confirmed that modified soil was prepared.