膨润土-壳聚糖复合材料对罗丹明吸附行为的研究

以膨润土-壳聚糖复合材料为吸附剂,对模拟罗丹明B废水进行吸附行为研究,考察了壳聚糖负载量、pH值、吸附时间、罗丹明B初始浓度等因素对吸附效果的影响,并分析吸附等温线及吸附机理。结果表明,最佳壳聚糖负载量为0.005g/g,最佳pH值为6;随着吸附温度的升高,吸附量增加;在吸附过程中化学吸附占优势;对实验数据运用相关吸附等温线模型拟合,得出等温吸附平衡更符合Langmuir模型。

Behavioral Study of Adsorption of Rhodamine by Bentonite-chitosan Composites

In this paper, bentonite-chitosan composites were adopted as adsorbent to study the adsorption of RhB from the simulated RhB-contained solutions. The effects of chitosan loading amount, pH, adsorption time, and initial concentration of RhB solution on the adsorption were studied in details and the adsorption isotherm and adsorption mechanism were analyzed as well. The results showed that the optimal chitosan loading amount was 0.005 g/g and the optimal pH was 6. The adsorption amount increased with the increase of adsorption temperature. During the adsorption process, chemical adsorption occupied the dominant position. The experimental data indicated that Langmuir model could describe the process properly.