基于碳甲基纤维素的新型水凝嵌入金属有机框架,以有效地从水中去除阴离子染料
Xiaohong Wang1, Junjie Chen1, Jiayi Zhou1
1School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang, Jiangsu 212013, China.
International journal of biological macromolecules
|November 9, 2024
概括
一种新型的水凝吸附剂RCβ@Cu-BTC有效地从废水中去除阴阳性染料. 这种吸附剂显示出高容量和良好的可回收性,显示出染料废水处理的巨大潜力.
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:
- 污染废水的化染料带来环境和健康风险.
- 开发高效和可回收的吸附剂对于去除染料至关重要.
- 现有的吸附剂通常面临容量和可重复使用性的限制.
研究的目的:
- 合成一种新的水凝吸附剂,以有效地去除阴阳性染料.
- 为了研究合成的水凝的吸附性能和机制.
- 评估吸附剂在染料废水处理中的可重复使用性和潜在应用.
主要方法:
- 合成了减少的石墨烯氧化物/碳氧甲基纤维素/β-环氧化 (rGO/CMC/β-CD) 水凝 (RCβ).
- 在RCβ水凝上金属有机框架 (Cu-BTC) 的现场生长形成RCβ@Cu-BTC.
- 批量吸附实验以优化参数 (吸附剂量,pH,时间) 并研究吸附动力学和异热量.
- 染料吸附实验使用甲蓝 (MB),水晶紫 (CV) 和马拉绿 (MG).
- 在五个吸附-脱附周期的可回收性测试.
主要成果:
- 在最佳条件下 (pH 6.0,0.01 g吸附剂,25°C) 合成的RCβ@Cu-BTC水凝对MB (892.66 mg g−1),CV (842.75 mg g−1) 和MG (633.77 mg g−1) 具有很好的吸附能力.
- 吸附动力学遵循伪二阶模型,表明化学吸附是限制速度的步骤.
- 吸附机制涉及静电相互作用,键和π-π相互作用.
- 吸附剂在五个循环后保持了高的去除效率 (MB: 80%,CV: 77%,MG: 72%).
结论:
- RCβ@Cu-BTC水凝是一种高效且可回收的阴阳性染料吸附剂.
- 这项研究表明了这种新型水凝复合物的潜力,用于染料废水处理中的实际应用.
- 进一步的研究可以探索可扩展性和实际工业废水场景中的应用.
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