铁氧化物核心外纳米链作为水溶液中的水晶紫色和刚果红色染料的高性能吸附剂
Marcin Krajewski1, Paulina Pietrzyk1, Magdalena Osial1
1Polish Academy of Sciences, Institute of Fundamental Technological Research, Pawińskiego 5B, 02-106 Warsaw, Poland.
Langmuir : the ACS journal of surfaces and colloids
|May 31, 2023
概括
铁氧化物纳米链有效地从水中去除致癌的水晶紫色和刚果红色染料. 这些磁纳米链显示出出色的吸附能力和可重复用于净化水的可用性.
科学领域:
- 材料科学 材料科学 材料科学
- 环境化学环境化学
- 纳米技术纳米技术
背景情况:
- 像水晶紫 (CV) 和刚果红 (CR) 这样的致癌染料对环境和健康构成重大风险.
- 从废水中有效地去除这些染料对于环境保护至关重要.
研究的目的:
- 合成和研究铁-氧化铁纳米链 (FeNCs) 作为致癌CV和CR染料的吸附剂.
- 评估FeNCs从水溶液中去除染料的吸附效率,动力学和同热量.
主要方法:
- 使用磁场诱导的还原反应制备FeNC,形成核心外结构 (Fe@Fe3O4).
- 使用紫外线对光谱进行吸附实验,以确定最佳条件 (剂量,pH值,接触时间).
- 吸附动力学和同热量被分析使用伪第一阶,特姆金,雷德利希-彼得森和朗穆尔模型.
主要成果:
- 铁NC具有很高的吸附能力:CV为778.47毫克g-1,CR为348.46毫克g-1.
- 在特定的pH值和接触时间 (CV的pH值为90分钟,CR的pH值为150分钟) 实现了最佳的去除.
- 吸附遵循伪第一阶动力学和特姆金模型,表明化学吸附和潜在的库伦比相互作用.
结论:
- 铁NC是高效的吸附剂,可以从水中去除CV和CR染料.
- 磁芯-外结构使其易于分离和重复使用,在五个吸附/脱附周期中表现出色.
- 铁NC为废水处理和环境修复应用提供了一个有希望的,可持续的材料.
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