Marszałek Marta, Piotrowski Marcin, Dziełak Barbara, Blicharz Mariola, Malarska Wiktoria, Wzorek Zbigniew
Cracow University of Technology, Faculty of Chemical Engineering and Technology, Warszawska 24, 31-155 Krakow, Poland.
Materials (Basel). 2024 Dec 20;17(24):6226. doi: 10.3390/ma17246226.
The removal of copper from wastewater of mine origin requires the use of an appropriate method. Sorption methods are considered to be one of the best solutions for removing copper from industrial wastewater at low levels. Metal(IV) phosphates have been reported as excellent sorption materials that can be highly selective for copper. Therefore, the aim of this research was to synthesize titanium(IV), zirconium(IV), and cerium(IV) phosphates with a wide range of P:Metal(IV) molar ratios (0.5-10) in the reaction mixture and under mild conditions, using a simple scalable approach which requires minimal financial outlays. The obtained materials were characterized using XRD, ATR-FTIR, SEM-EDS techniques, and pH titration. To evaluate the performance of the resulting materials, their sorption properties towards copper ions were examined in comparison with selected commercially available ion-exchange resins. In each group of metal(IV) phosphates, the best material has a high ion-exchange capacity: 16.9 meq/g for titanium sorbent, 8.8 meq/g for zirconium sorbent, and 7.0 meq/g for cerium sorbent. Zirconium phosphate synthesized at a P:Zr molar ratio in the reaction mixture of 10:1 exhibits the best sorption properties towards copper ions in a solution similar to mining wastewater (acidic, saline, and containing heavy metals), better than some commercial ion-exchange resins.
从矿山废水中去除铜需要使用合适的方法。吸附法被认为是从低浓度工业废水中去除铜的最佳解决方案之一。金属（IV）磷酸盐已被报道为对铜具有高度选择性的优异吸附材料。因此，本研究的目的是在温和条件下，采用一种简单的可扩展方法，在反应混合物中以广泛的P：金属（IV）摩尔比（0.5 - 10）合成钛（IV）、锆（IV）和铈（IV）磷酸盐，该方法所需资金投入最少。使用XRD、ATR - FTIR、SEM - EDS技术和pH滴定对所得材料进行表征。为了评估所得材料的性能，将它们对铜离子的吸附性能与选定的市售离子交换树脂进行了比较。在每组金属（IV）磷酸盐中，最佳材料具有高离子交换容量：钛吸附剂为16.9 meq/g，锆吸附剂为8.8 meq/g，铈吸附剂为7.0 meq/g。在反应混合物中P：Zr摩尔比为10：1合成的磷酸锆在类似于矿山废水（酸性、含盐且含有重金属）的溶液中对铜离子表现出最佳吸附性能，优于一些市售离子交换树脂。
