吸附有毒金属使用嵌入混合离子交换树脂的氧化纳米颗粒
Zizikazi Sodzidzi1, Zebron Phiri1, Jemal Fito Nure1
1Institute for Nanotechnology and Water Sustainability (iNanoWS), College of Science Engineering and Technology, University of South Africa, Florida Science Campus, Johannesburg 1709, South Africa.
Materials (Basel, Switzerland)
|March 13, 2024
概括
新型混合离子交换树脂与含水性铁氧化物 (HFO) 嵌入,有效地从酸性矿井排水 (AMD) 中去除有毒重金属. 这些HFO嵌入树脂显示出高效率和快速吸附率,可去除,和.
科学领域:
- 环境科学 环境科学
- 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:
- 酸性矿井排水 (AMD) 由于其酸性,有毒性和富含硫酸盐的性质,造成了重大环境风险.
- 重金属污染,包括 (Cr) (VI), (Cd) (II) 和 (Pb) (II)),是AMD的一个关键问题.
- 有效的治疗方法对于减轻AMD对环境的影响至关重要.
研究的目的:
- 开发和评估用于从AMD中去除重金属的新型混合离子交换树脂.
- 合成与含水铁氧化物 (HFO) 嵌入的阳离子 (HAIX-HFO) 和阴离子 (HCIX-HFO) 交换树脂.
- 在模拟和实际AMD条件下评估这些树脂的Cr (VI),Cd (II) 和Pb (II) 的吸附能力和动力学.
主要方法:
- 合成混合离子交换树脂 (HAIX-HFO和HCIX-HFO),其中包含含水铁氧化物 (HFO).
- 使用扫描电子显微镜和拉曼光谱学对树脂的表征.
- 批量吸附实验以确定在酸性和硫酸盐丰富条件下的吸附效率,动力学和再生能力.
主要成果:
- 两种HAIX-HFO和HCIX-HFO树脂都表现出高吸附效率和对它们的目标重金属的快速吸附率.
- HCIX-HFO显示,金属离子从实际的AMD样本中显著去除.
- 使用NaCl的和HCIX-HFO的再生成功地回收了被吸附的Cd (II) 和Pb (II).
结论:
- 嵌入HFO的混合离子交换树脂是治疗AMD的高效吸附剂.
- 这些新型树脂为从污染水中去除有毒重金属如,和提供了有希望的解决方案.
- 开发的树脂显示出在AMD修复中实际应用的潜力.
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