点击反应改性稻草用于贵金属离子的选择性萃取。
Rice straw modified by click reaction for selective extraction of noble metal ions.
机构信息
School of Materials Engineering, Key Laboratory for Ecological-Environment Materials of Jiangsu Province, Key Laboratory for Advanced Technology in Environmental Protection of Jiangsu Province, Yancheng Institute of Technology, Yancheng 224051, China.
School of Materials Engineering, Key Laboratory for Ecological-Environment Materials of Jiangsu Province, Key Laboratory for Advanced Technology in Environmental Protection of Jiangsu Province, Yancheng Institute of Technology, Yancheng 224051, China.
出版信息
Bioresour Technol. 2015 Feb;177:182-7. doi: 10.1016/j.biortech.2014.11.092. Epub 2014 Nov 27.
Rice straw was modified by azide-alkyne click reaction in order to realize selective extraction of noble metal ions. The ability of the modified straw to adsorb Pd(2+) and Pt(4+) was assessed using a batch adsorption technique. It was found that the sorption equilibrium could be reached within 1h and the adsorption capacity increased with temperature for both Pd(2+) and Pt(4+). The maximum sorption capacities for Pd(2+) and Pt(4+) were respectively attained in 1.0 and 0.1 mol/L HCl. The modified straw showed excellent selectivity for noble metal ions in comparison to the pristine straw. In addition, the modified straw was examined as a column packing material for extraction of noble metal ions. It was indicated that 1.0 mL/min was the best flow rate for Pd(2+) and Pt(4+). The modified straw could be repeatedly used for 10 times without any significant loss in the initial binding affinity.
稻草经过叠氮-炔点击反应修饰，以实现对贵金属离子的选择性提取。采用间歇吸附技术评估了改性稻草吸附 Pd(2+)和 Pt(4+)的能力。结果表明，吸附平衡在 1 小时内即可达到，且对于 Pd(2+)和 Pt(4+)，吸附容量随温度升高而增加。在 1.0 mol/L 和 0.1 mol/L HCl 中，分别达到了对 Pd(2+)和 Pt(4+)的最大吸附容量。与原稻草相比，改性稻草对贵金属离子具有优异的选择性。此外，还将改性稻草作为填充材料用于贵金属离子的萃取。结果表明，Pd(2+)和 Pt(4+)的最佳流速分别为 1.0 mL/min。改性稻草可重复使用 10 次，而初始结合亲和力无明显损失。
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