使用限制在强基离子交换机中的Mg-Zr二元金属氧化物纳米颗粒进行增强的化物去除
Chengqiang He1, Yue Sun1, Yingpeng Gu1
1Department of Municipal Engineering, School of Civil Engineering, Southeast University, Nanjing, 210096, China.
Chemosphere
|April 26, 2024
概括
一种新的混合吸附剂,Mg-Zr-D213,有效地从中性水中去除化物,优于现有的材料. 这为处理受污染的地下水和工业废水提供了有希望的解决方案.
科学领域:
- 环境化学环境化学
- 材料科学 材料科学 材料科学
背景情况:
- 地下水和工业废水等中性pH水源中的化物污染构成了重大挑战.
- 传统的金属改性吸附剂通常需要酸性条件才能有效地去除化物,这限制了它们的适用性.
研究的目的:
- 开发一种新的混合吸附剂,Mg-Zr-D213,用于从中性pH水中增强化物吸附.
- 为了评估Mg-Zr-D213的性能,与单金属改性树脂和基本树脂D213.3相比.
主要方法:
- 通过将纳米-Mg/Zr二元金属 () 氧化物加载到强基离子交换机 (D213) 上来合成Mg-Zr-D213.
- 在中性条件下的吸附实验,包括与竞争性离子和有机酸的干扰研究.
- 兰木尔异热模拟和柱体实验用于容量和处理量评估.
- 用X射线光电子谱 (XPS) 阐明吸附机制.
主要成果:
- 与单金属树脂相比,Mg-Zr-D213在中性水中显示出更高的化物去除能力.
- 在干扰物质的存在下,吸附剂表现出极好的选择性.
- 根据Langmuir模型,最大吸收容量被确定为41.38 mg/g.
- 专实验显示,Mg-Zr-D213的有效治疗量比D213高8-16倍.
- 使用NaOH-NaCl化剂实现了95%以上的化物回收.
结论:
- Mg-Zr-D213显示出有效的化物去除中性pH水源的显著潜力.
- 在D213和Mg/Zr氧化物四级基之间的协同作用增强了化物吸附.
- 连接物交换或金属-连接物相互作用是化物结合的主要机制.
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