捕获Cu2+和回收使用的Cu吸收剂作为消除Rhodamine B的催化剂:反应性和机制
Caiyun Han1, Jing Xie, Qin Shi2
1Guangxi Colleges and Universities Key Laboratory of Environmental-friendly Materials and New Technology for Carbon Neutralization, Guangxi Key Laboratory of Advanced Structural Materials and Carbon Neutralization, School of Materials and Environment, Guangxi Minzu University, Nanning, 530105, China. adsorptionly@sina.com.
Environmental science and pollution research international
|October 2, 2023
概括
消耗的ZSM-5/nZVI吸附剂有效地捕获了Cu(II),然后再使用过氧化来降解罗达胺B (RhB). 这种新的方法通过重新利用吸附材料,为废水处理提供了一个可持续的解决方案.
科学领域:
- 环境化学环境化学
- 材料科学 材料科学 材料科学
- 催化剂是一种催化剂.
背景情况:
- 废弃吸附剂的处置是吸附过程中的一个重大挑战.
- 在ZSM-5上支持的零价值铁 (nZVI) 显示出对吸附Cu的承诺.
- 罗达胺B (RhB) 是一种常见的污染物,需要有效的降解方法.
研究的目的:
- 调查使用过的Cu(II) 吸附剂 (ZSM-5/nZVI) 作为Rhodamine B (RhB) 降解的催化剂的再利用.
- 评估Cu (II) 的吸附性能和RhB去除的催化效率.
- 了解Cu (II) 吸附和RhB降解的基本机制.
主要方法:
- 进行了批量实验,以评估Cu (II) 吸附和RhB去除.
- 使用X射线光电谱 (XPS) 分析了表面化学和氧化还原反应.
- 研究了pH值,初始Cu(II) 度和过氧化 (H2O2) 度对去除效率的影响.
主要成果:
- 对ZSM-5/nZVI的Cu(II) 吸附遵循伪二阶动力学,在pH值4.0时最大吸附能力为375.9mg/g.
- 在吸附过程中,Fe ((0) 和Cu ((II) 之间发生了氧化还原反应,形成Fe ((II),Fe ((III) 和Cu ((0).
- 消耗的吸附剂有效降解了RhB,在8分钟内使用1.75mM H2O2实现了>99.9%的去除,主要是通过基氧化.
结论:
- 消耗的ZSM-5/nZVI吸附剂,在Cu(II) 捕获后,可以有效地作为RhB降解的催化剂重新使用.
- 这项研究表明了吸附剂价值化和废水处理的可行战略.
- 基基是负责RhB有效降解的关键物种.
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