使用甘氨酸和性溶液的废水解硫催化剂中和的环保两步出
Hassan Safari1, Hadi Abdollahi1, Sina Ghassa2
1School of Mining Engineering, College of Engineering, University of Tehran, Tehran, Iran.
Journal of environmental management
|December 7, 2025
概括
本研究提出了一种两步环保的方法,用于回收废弃的脱硫化 (HDS) 催化剂,使用溶液和甘氨酸有效提取 (Mo) 和 (Ni). 该过程实现了高金属回收,同时最大限度地减少了对环境的影响.
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:
- 消耗水解硫 (HDS) 催化剂含有有价值的金属,如 (Mo) 和 (Ni).
- 这些催化剂的有效回收提供了经济优势,并减少了环境负担.
- 目前的回收方法往往涉及有害化学品,并产生废物.
研究的目的:
- 开发一个环保的,两步过程,从废弃的HDS催化剂中提取Mo和Ni.
- 为了利用甘氨酸作为绿色试剂用于金属回收.
- 优化选择性出Mo和Ni的条件.
主要方法:
- 使用性溶液和甘氨酸,采用了两步出水过程.
- (Mo) 首先使用NaOH溶液出.
- 随后, (Ni) 用性甘氨酸与过氧化 (H2O2) 溶液被出.
主要成果:
- 第一个步骤在优化条件下实现了85.7%的Mo液 (0.15M NaOH,pH 10.5).
- 第二个步骤使用性甘氨酸 (2M,pH11,1%H2O2,85°C) 实现了95.8%的Ni浸出.
- 在ICP-OES分析中证实了Mo和Ni的选择性浸出.
结论:
- 拟议的两步方法对于回收使用的Ni-Mo/Al2O3催化剂是有效的.
- 使用甘氨酸和过氧化物为传统的酸洗提供了一个更绿色的替代方案.
- 这种方法为使用过的催化剂回收提供了一种新且环保的战略.
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