Guangxi Key Laboratory of Information Materials & Engineering Research Center of Electronic Information Materials and Devices, Ministry of Education, Guilin University of Electronic Technology, Guilin 541004, PR China.
Guangxi Key Laboratory of Information Materials & Engineering Research Center of Electronic Information Materials and Devices, Ministry of Education, Guilin University of Electronic Technology, Guilin 541004, PR China.
Int J Biol Macromol. 2024 May;266(Pt 1):131142. doi: 10.1016/j.ijbiomac.2024.131142. Epub 2024 Mar 26.
This study addresses the challenge of platinum-group metal scarcity by exploring the adsorption of these metals from industrial wastewater. An inexpensive adsorbent with selective platinum-group metal adsorption capacity, named chitosan/citric acid@diatomaceous earth-sugarcane bagasse (CTS/CA@DE-SBS), was newly synthesized. The material features a double coating of chitosan and diatomite on bagasse biochar, and it exhibits an excellent adsorption performance for platinum-group metals due to the synergistic effects of the biochar and chitosan-diatomaceous earth intercross-linked coatings. CTS/CA@DE-SBS achieved an 81 % adsorption efficiency and a static saturated adsorption capacity of 217 mg/g for Pt (IV) in water. Notably, the material exhibited selective adsorption properties for platinum-group metals dissolved in diverse aqueous solutions. The potential for the secondary recovery of platinum-group metals in complex aqueous bodies further underscores the significance of this adsorbent. In conclusion, this research introduces a promising solution for platinum-group metal shortages, offering a cost-effective and selective adsorbent with potential applications in the secondary recovery of these metals from industrial wastewater.
本研究通过探索从工业废水中吸附这些金属来解决铂族金属短缺的问题。新合成了一种名为壳聚糖/柠檬酸@硅藻土-甘蔗渣（CTS/CA@DE-SBS）的廉价吸附剂，具有选择性吸附铂族金属的能力。该材料在甘蔗渣生物炭上具有壳聚糖和硅藻土的双层涂层，由于生物炭和壳聚糖-硅藻土交联涂层的协同作用，对铂族金属表现出优异的吸附性能。CTS/CA@DE-SBS 在水中对 Pt（IV）的吸附效率达到 81%，静态饱和吸附容量为 217mg/g。值得注意的是，该材料对溶解在不同水溶液中的铂族金属表现出选择性吸附特性。在复杂水体系中二次回收铂族金属的潜力进一步凸显了这种吸附剂的重要性。总之，本研究为铂族金属短缺问题提供了一种有前景的解决方案，提供了一种具有成本效益和选择性的吸附剂，有望从工业废水中二次回收这些金属。
