一种生物水凝,用于从电子废物中回收Au(III)
Sudeshna Saha1, Hirakendu Basu2, Shweta Singh2
1Analytical Chemistry Division, Bhabha Atomic Research Center, Trombay, Mumbai, 400085, India; Homi Bhabha National Institute, Training School Complex, Anushaktinagar, Mumbai, 400094, India.
Journal of environmental management
|June 8, 2024
概括
这项研究介绍了一种绿色化学方法,使用玄米水凝从电子废物中回收黄金. 生物吸收剂实现了90%以上的黄金吸收,提供了高效的回收解决方案.
科学领域:
- 绿色化学和材料科学 绿色化学和材料科学
- 专注于从废物流中回收有价值金属的可持续方法.
- 研究生物原材料在环境修复中的应用.
背景情况:
- 电子废物 (电子废物) 由于其复杂的组成和贵重金属的存在,造成了重大的环境挑战.
- 传统的金属回收方法可能对环境有害,经济不可行.
- 越来越需要环保和高效的技术来从电子垃圾中提取黄金等贵金属.
研究的目的:
- 开发和评估一种绿色化学方法,用于从电子废物中回收黄金.
- 为了利用一种来自白种子 (Ocimum basilicum L.) 的新生物吸附剂进行黄金吸附.
- 评估玄米种子水凝在从浸电子废物中捕获黄金离子方面的效率和能力.
主要方法:
- 一个两阶段的过程,涉及物理分离 (埃迪电流分离器),然后是水.
- 使用FTIR,XRD,SEM和BET分析对玄米种子水凝的表征.
- 批量吸附实验以确定最佳pH值范围和吸附能力,包括干扰研究.
主要成果:
- 玄米种子水凝在pH值范围为2-5时,表现出高黄金吸收率 (>90%).
- 根据Langmuir异热模型,水凝的最大吸收能力为188.44mgg-1.
- (Pb) 是唯一发现干扰黄金吸附的离子;其他常见离子没有显著干扰.
- 从浸的电子废物溶液中有效地回收了Au(III).
结论:
- 种子水凝是一种有希望的,可持续的,有效的生物吸剂,用于从电子废物中回收黄金.
- 开发的绿色化学方法为电子废物回收提供了一个环保的替代方案.
- 进一步的研究可以探索扩大这个工艺的工业应用.
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