铜 (Cu) 和 (Pb) 通过两阶段pH控制的流化床非种子颗粒工艺处理
Sheila A Balladares1, Mark Daniel G de Luna2, Ralf Ruffel M Abarca3
1Environmental Engineering Program, National Graduate School of Engineering, University of the Philippines Diliman, Quezon City 1101, Philippines.
Journal of hazardous materials
|April 19, 2025
概括
这项研究探讨了一种两阶段的流化床颗粒化工艺,用于去除铜和. 最佳条件实现了超过99%的去除效率和重金属的高积累率.
科学领域:
- 环境工程 环境工程
- 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.
背景情况:
- 水中的重金属污染对环境和健康构成重大风险.
- 有效的处理方法对于从废水中去除铜 (Cu) 和 (Pb) 等有毒金属至关重要.
- 液化床颗粒化提供了一种有前途的方法,通过颗粒形成来对金属进行修复.
研究的目的:
- 为了研究一个两个阶段的pH控制的流化床非种子颗粒处理过程,同时去除Cu和Pb.
- 为了检查运行参数的影响,如Cu-to-Pb摩尔比率 (MR1),金属-碳酸盐摩尔比率 (MR2),液压保留时间 (HRT) 和第一阶段pH (pH1).
- 描述形成的颗粒,了解金属物种化和沉机制.
主要方法:
- 一个双阶段pH控制的流化床反应器被用于颗粒化.
- 系统地测试了各种操作条件 (MR1,MR2,HRT,pH1).
- 使用X射线衍射 (XRD) 分析了颗粒的特性.
- 使用Pourbaix图和溶解度曲线推断金属物种的发生.
主要成果:
- 生产了多层的球形颗粒,主要含有石 (PbCO3).
- 由于低度和抑制,铜种可能形成无形的碳酸铜氧化物.
- 最佳条件 (MR1=5.0,MR2=1.5,HRT=22.5分钟,pH1=7.5) 产生了高的去除效率 (>99%) 和积累率 (80-95%).
结论:
- 两阶段的流化床颗粒化在同时去除Cu和Pb方面是有效的.
- 操作参数显著影响颗粒性质,去除效率和金属积累.
- 该过程表明了有效处理重金属废水的潜力.
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