| 和芹,舒世立.化学通报,2023,86(12):1523-1529. |
| 磁性海藻酸钠三互穿网络水凝胶对亚甲基蓝的吸附 |
| Adsorption of methylene blue on magnetic sodium alginateTriple interpenetrating structure hydrogel beads |
| 投稿时间：2023-04-13 修订日期：2023-06-24 |
| DOI： |
| 中文关键词: 海藻酸钠 羧甲基纤维素钠 壳聚糖 吸附 亚甲基蓝 |
| 英文关键词:sodium alginate sodium carboxymethyl cellulose chitosan adsorption methylene blue |
| 基金项目:唐山师范学院项目(2022C41,2023C10)资助 |
|
| 摘要点击次数: 720 |
| 全文下载次数: 220 |
| 中文摘要: |
| 以海藻酸钠为水凝胶骨架材料，以羧甲基纤维素钠（CMC）和质子化壳聚糖（CTS）为强度增强材料，制备磁性水凝胶球吸附剂Fe3O4@SA@CMC@CTS，研究其对水溶液中亚甲基蓝（MB）的吸附特性，考察吸附时间、MB 初始浓度、离子强度、吸附剂加入量等对凝胶球吸附性能的影响；引入吸附动力学和热力学模型对吸附过程进行分析，并采用傅里叶红外光谱（FT-IR）、Zeta 电位、磁滞回线和X射线光电子能谱（XPS）对凝胶球特征及吸附机理进行综合分析。结果表明：在25 ℃、质量浓度为700 mg/L的MB溶液、凝胶球用量为0.2 g/L的条件下，平衡吸附量为2143.0 mg/g；700 mg/L的MB溶液最佳凝胶球投加量为 0.4 g/L，重复利用5次后，吸附量仍高达1228.4 mg/g。动力学拟合显示该吸附过程更符合准一级动力学模型，等温拟合表明Freundlich 吸附等温方程可以更好地描述该吸附过程。 |
| 英文摘要: |
| The problem of dye waste water has become a key issue to be solved urgently, we prepared Fe3O4@SA@CMC adsorbent by using sodium alginate (SA) as the skeleton material combining with sodium carboxymethyl cellulose (CMC) and Chitosan (CTS) as mechanical strengthen agents. The adsorption characteristics of Fe3O4@SA@CMC@CTS hydrogel beads for methylene blue in aqueous solution were studied. The adsorption behaviors of methylene blue (MB) were evaluated by varying the experimental conditions including adsorption time, initial concentrations, ionic strength and the initial mass concentration. We applied adsorption kinetics and thermodynamic models to analyze the adsorption characters. Multiple characterization methods, including FTIR, Zeta potential, VTM, and SEM were comprehensively used to analyze the mechanism of MB adsorption. The results showed with the temperature was 25 ℃，when the initial mass concentration of MB was 700 mg/L, and the adsorbent amount was 0.2 g/L, the adsorption capacity for MB was 2143.0 mg/g. The optimal dosage was 0.4 g/L when the mass concentration of MB was 700 mg/L, after five regeneration experiments the adsorption amount also reached 1228.4 mg/g. The adsorption process conforms to the pseudo-first-order kinetics and Freundlich isotherm adsorption model. |
| 查看全文 查看/发表评论 下载PDF阅读器 |
| 关闭 |
京公网安备11010802047317号