基于废棉的活性炭具有对染料和抗生素的优良吸附性能
Xi Chen1, Ming Li1, Jingjing He1
1School of Materials Science and Engineering, Sichuan University, Chengdu, 610065, People's Republic of China.
Chemosphere
|March 12, 2025
概括
废弃的棉纤维被转化为各种有机污染物的高性能吸附剂. 这种以棉花为基础的活性炭 (CAC) 在废水处理应用中表现出异常的容量和稳定性.
科学领域:
- 材料科学 材料科学 材料科学
- 环境科学 环境科学
- 化学工程是化学工程的重要组成部分.
背景情况:
- 传统的废水处理方法与各种有机污染物作斗争.
- 开发高效,可持续的吸附剂对于环境修复至关重要.
- 废物材料如棉纤维的价值化为吸附剂合成提供了一个有前途的途径.
研究的目的:
- 从废弃的棉纤维中合成一种新型吸附剂,以有效地去除有机污染物.
- 描述吸附剂的特性,包括表面积和孔隙结构.
- 评估吸附剂在各种条件下的容量,选择性和稳定性.
主要方法:
- 废弃的棉纤维通过热解激活工艺转化为活性炭 (CAC).
- 使用BET和BJH方法分析了特定的表面积和毛孔结构.
- 确定了各种染料 (甲蓝,刚果红,罗达胺B,甲基) 和抗生素 (四环素化物,西普罗素化物) 的吸附能力.
- 研究了吸附机制,并评估了吸附剂的稳定性/可回收性.
主要成果:
- 合成的CAC表现出较大的特定表面积 (3709 m2 g−1) 和优化的孔隙结构.
- 实现了高和吸附能力:甲蓝的2331毫克g−1,刚果红的7265毫克g−1和四环素化的1250毫克g−1.
- 吸附剂在一系列污染物和条件下表现出色,包括不同的pH值,共存的离子和多组件系统.
- 观察到有效的再生和回收,突出显示了吸附剂的耐用性.
结论:
- 从废弃的棉纤维成功开发出一种高效和多用途的基于生物质的吸收剂 (CAC).
- 吸附剂的优越性能归因于其大表面积,合适的孔隙结构和多种吸附机制.
- 由于其效率,稳定性和可回收性,CAC显示出在先进的废水处理中实际应用的巨大潜力.
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