从PCB中有效和有选择地捕获Au(III) 通过五乙烯胺修饰的甲基化聚烯珠
Haixia Lv1, Lifang Peng2, Wenkang Li2
1Department of Public Courses, Shaanxi Polytechnic Institute, Xianyang, 712000, China.
Environmental science and pollution research international
|October 18, 2023
概括
从电子垃圾中回收黄金对于可持续性至关重要. 这项研究引入了五乙烯胺修饰的甲基聚烯珠 (PEHA-CMPS) 来有效地从印刷电路板中回收Au(III,实现高吸附能力和选择性.
科学领域:
- 材料科学 材料科学 材料科学
- 环境化学环境化学
- 化学工程是化学工程的重要组成部分.
背景情况:
- 黄金回收利用解决了资源枯竭和污染问题.
- 印刷电路板 (PCB) 是黄金废物的重要来源.
研究的目的:
- 为了合成和评估五乙烯胺修饰的甲基聚烯珠 (PEHA-CMPS) 的Au (III) 恢复.
- 评估PEHA-CMPS的吸附效率,选择性和可重复使用性,用于从PCB中回收黄金.
主要方法:
- 在PEHA-CMPS吸附剂的合成.
- 批量吸附实验以确定Au(III) 的吸收能力和动力学.
- 朗穆尔和伪二阶模型被用于分析吸附数据.
- 使用实际PCB液的选择性捕获实验.
- 列分离研究和吸附-脱附循环.
- 使用FTIR,XRD和XPS进行表面表征.
主要成果:
- 在广泛的pH范围内,PEHA-CMPS表现出高的Au (III) 吸附效率.
- 吸附过程最适合伪二阶和兰迈尔模型.
- 对于Au (III) 的最大吸附能力达到了1186 mg/g.
- 从PCB浸出溶液中选择性回收Au(III) 的效率超过了80%.
- 吸附效率在五个循环后保持在95%,这表明可重复使用性很好.
- 表面分析证实了静电相互作用,化和氧化还原过程的联合机制.
结论:
- PEHA-CMPS是一种高效的吸附剂,用于从电子垃圾中回收Au.
- 该材料显示出在黄金回收和环境修复等行业应用的巨大潜力.
- 该研究强调了可持续黄金资源管理的有希望的战略.
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