从水性介质中选择性回收黄金,使用磁性PEG交联聚乙烯
Seyed Mehdi Sajjadi1, Sajad Ahmadi1, Hossein Behniafar1
1School of Chemistry, Damghan University, Damghan 36716-41167, Iran.
Langmuir : the ACS journal of surfaces and colloids
|April 8, 2025
概括
涂有PEG交联和TETA终端聚烯的磁性纳米颗粒有效吸附Au (III) 离子. 这种新型吸附剂表现出高容量和自发的内热吸附,用于黄金回收.
科学领域:
- 材料科学 材料科学 材料科学
- 环境化学环境化学
- 纳米技术 纳米技术
背景情况:
- 开发高效的吸附剂用于贵金属回收至关重要.
- 磁纳米粒子在分离和可回收方面具有优势.
- 纳米粒子的功能化增强了吸附性质.
研究的目的:
- 合成和描述一种基于磁纳米粒子的新型吸附剂 (MNP-PEGPS-L).
- 评估MNP-PEGPS-L对水溶液中的Au (III) 离子的吸附性能.
- 研究吸附机制,动力学和热力学.
主要方法:
- 通过原子转移基聚合 (ATRP) 合成MNP-PEGPS-L.
- 使用FTIR,TGA,SEM,EDX,XRD,VSM,BET和DLS进行表征.
- 吸附性研究包括参数 (pH,剂量,时间,温度) 的优化和动力/异热模型.
主要成果:
- MNP-PEGPS-L具有多孔结构,其特定表面积为29.13 m2·g−1.1.
- 在pH 3,0.2 mg·mL−1的吸附剂剂量,60分钟的接触时间和25°C的温度下达到最佳吸附条件.
- 通过兰木尔模型,最大吸附能力 (Qmax) 为280mg·g−1;吸附是化学吸附之后的,是内热的,自发的.
结论:
- 合成的MNP-PEGPS-L吸附剂显示了Au(III) 离子回收的极佳潜力.
- 高水友性,多孔性和可回收性有助于其有效性.
- 该研究强调了一种从废水中可持续回收黄金的有希望的方法.
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