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用CuMn-LDH激活过氧硫酸盐来降解双A:作用,机制和途径

Mingqi Xie¹, Meina Liang¹, Chongmin Liu²

¹College of Environmental Science and Engineering, Guilin University of Technology, Guilin 541004, China; Guangxi Key Laboratory of Theory & Technology for Environmental Pollution Control, Guilin University of Technology, Guilin 541004, China.

Ecotoxicology and environmental safety

|January 9, 2024

概括

一种新型的铜层双氧化物 (Cu3Mn-LDH) 通过先进的氧化方法在水中有效降解双A (BPA). 这种催化剂激活过氧硫酸盐 (PMS),显示出高效率和可重复使用的净化水.

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:

双A (BPA) 是一种普遍存在的水污染物,需要有效的补救策略.
先进的氧化工艺 (AOP) 为降解持久有机污染物提供了一个有希望的途径.

研究的目的:

为了合成和描述一个新的Cu3Mn-LDH材料作为BPA降解的催化剂.
为了研究Cu3Mn-LDH在激活多氧硫酸盐 (PMS) 以去除BPA的催化性能.
根据开发的AOP,阐明BPA的降解机制和降解途径.

主要方法:

3Mn-LDH复合活性剂的热水合成.
使用X射线衍射 (XRD),FTIR和TEM进行表征.
使用Cu3Mn-LDH和PMS进行降解实验,通过火和EPR分析活性氧物种 (ROS),并使用GCMS识别中间体.

主要成果:

在中性和性条件下,Cu3Mn-LDH在激活BPA降解的PMS方面表现出极好的催化活性.
在40分钟内完成了BPA (10 mg·L−1) 的完全降解,并以95%的TOC去除,使用0.25 g·L−1 PMS和0.10 g·L−1 Cu3Mn-LDH.
非自由基单氧被确定为BPA降解中的关键物种,催化剂在四个循环中表现出高的重复利用性.

结论:

合成的Cu3Mn-LDH是通过PMS激活BPA修复的高效催化剂.
该研究提出了一种涉及单氧的非激进降解机制,为处理有机污染物提供了一种新方法.
这项研究为开发用于污染水处理的高效催化系统提供了宝贵的见解.

关键词:

双 A 是一种双.有层的双氧化物.过氧单硫酸盐的使用单片氧化物氧化物.

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