Zhang Ningluo, Chen Shangqing, Hu Jiayin, Shi Jian, Guo Yafei, Deng Tianlong
Tianjin Key Laboratory of Marine Resources and Chemistry, College of Chemical Engineering and Materials Science, Tianjin University of Science and Technology Tianjin 300457 China
RSC Adv. 2020 Feb 7;10(11):6139-6145. doi: 10.1039/c9ra09803h.
A novel, facilely prepared, recyclable sodium carboxymethyl cellulose-ammonium phosphomolybdate composite (CMC-AMP) was synthesized by chemical cross-linking and used for Cs removal. The effects of adsorbent dosage, pH value, initial Cs concentration, contact time, temperature and competitive ions on adsorption were investigated. The results showed that CMC-AMP with good mechanical properties could effectively adsorb Cs in a wide pH range. In addition, the adsorption process of CMC-AMP was better fitted with the Lagergren first-second model and Langmuir isotherm model. Furthermore, CMC-AMP can be reused five times using ammonium chloride as the eluent without an obvious decrease in absorption activity. The results reveal that CMC-AMP can be used as a low cost and recyclable Cs adsorbent.
通过化学交联合成了一种新型、制备简便且可回收的羧甲基纤维素-磷钼酸铵复合材料（CMC-AMP），并将其用于去除铯。研究了吸附剂用量、pH值、初始铯浓度、接触时间、温度和竞争离子对吸附的影响。结果表明，具有良好机械性能的CMC-AMP能在较宽的pH范围内有效吸附铯。此外，CMC-AMP的吸附过程更符合 Lagergren 一级-二级模型和朗缪尔等温线模型。此外，以氯化铵为洗脱剂，CMC-AMP可重复使用五次，吸附活性无明显下降。结果表明，CMC-AMP可作为一种低成本且可回收的铯吸附剂。
