从废咖啡粉中制备的活性炭:染料的特征和吸附性质
Feryelle Aouay1,2, Afef Attia1, Lasâad Dammak3
1Research Unit "Advanced Technologies for Environment and Smart Cities", Faculty of Sciences, University of Sfax, 3000 Sfax, Tunisia.
Materials (Basel, Switzerland)
|July 13, 2024
概括
从消耗的咖啡粉中获得的活性炭有效地从废水中去除染料AO7. 这种可持续吸附剂在织废水处理方面表现出高效率和高容量.
科学领域:
- 材料科学 材料科学 材料科学
- 环境化学环境化学
- 化学工程是化学工程的重要组成部分.
背景情况:
- 消耗的咖啡粉 (SCG) 是一个重要的废物流,具有价值化潜力.
- 织工业的废水通常含有耐久性有机污染物,如色剂.
- 开发可持续吸附剂对于有效的废水处理至关重要.
研究的目的:
- 从SCG中合成活性炭 (AC).
- 评估AC在吸附亚染料AO7中的有效性.
- 使用统计方法优化吸附过程.
主要方法:
- 在600°C时通过酸激活进行AC合成.
- 使用X射线衍射,SEM和BET分析进行表征.
- 吸附研究采用动力学,等温和和热力学建模.
- 通过Box-Behnken设计和响应表面方法的优化.
主要成果:
- 电流表现出无形结构与中极孔 (平均5.5纳米).
- 吸附之后是伪二次动力学和兰格穆尔异热法 (119.5 mg/g容量).
- 在优化条件下实现了98%的AO7去除.
结论:
- 由SCG衍生出的AC是有机污染物的有前途的吸附剂.
- 物理吸收,主要是通过π-π相互作用,控制吸附机制.
- 这种方法为织废水处理提供了一种高效和可持续的方法.
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