有效地吸附Au(S2O3)23-使用aminoguanidine作为从硫酸盐溶液中的捕获组
Yihuai Yang1, Xianzhi Hu2, Futing Zi1
1Faculty of Science, Kunming University of Science and Technology, Kunming, 650500, Yunnan, China.
概括
氨基瓜尼丁功能化的微球 (AGM) 从硫酸盐溶液中有效地回收黄金. 这种绿色提取方法显示出可持续黄金回收的前景,AGM显示出良好的周期稳定性和吸附能力.
科学领域:
- 材料科学 材料科学 材料科学
- 化学工程是化学工程的重要组成部分.
- 环境科学 环境科学
背景情况:
- 硫酸硫酸盐浸为提取黄金的化物提供了一个更绿色的替代方案.
- 从硫酸硫酸盐溶液中有效地回收黄金仍然是一个重大挑战.
- 开发新的吸附剂对于推进无化物黄金加工至关重要.
研究的目的:
- 开发和评估氨基瓜尼丁功能化的微球 (AGMs) 来从硫酸盐溶液中吸附黄金.
- 调查AGM用于黄金回收的吸附性能和机制.
- 评估AGM的循环应用潜力和实际适用性.
主要方法:
- 通过核替代合成AGMs.
- 使用SEM,BET,FTIR和XPS进行AGM的表征.
- 吸附实验,以确定pH值,温度和度的影响.
- 动力和同热模拟 (伪二次和兰格穆尔).
- 使用酸性氨酸和循环测试进行脱研究.
- 密度函数理论 (DFT) 计算用于机制阐明.
主要成果:
- 在广泛的pH范围内,AGM表现出高效的Au(I) 吸附.
- 吸附过程遵循伪二次动力学和兰格穆尔异热模型.
- 最大吸附能力达到了22.03公斤/.
- 在四个周期后,AGM显示出良好的循环稳定性,吸附率为78.63%.
- 阳离子交换被确定为主要的吸附机制.
- 在复杂的实用系统中观察到令人满意的性能.
结论:
- AGM是有效的吸附剂,用于从硫酸盐液中恢复Au (I).
- 开发的吸附剂具有高容量,良好的可回收性和明确的吸附机制.
- 这项研究为可持续和高效的黄金回收提供了一条可行的途径,使用硫酸盐炼.
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