探索烟尾的热分解及其在吸附过程中的作用
Carlos Felipe Herrera-Puerta1, Santiago Suspes-García1, Diana M Galindres-Jimenez1,2
1Grupo de Investigación en Ciencias y Educación (ICE), Facultad de Ciencias y Humanidades, Universidad de América, 111711, Bogotá, Colombia.
Heliyon
|April 8, 2025
概括
这项研究通过热解和KOH激活将吸烟烟尾 (SCB) 转化为活性炭 (AC). 由此产生的AC有效地去除了Cr (VI),证明了其对环境修复的潜力.
科学领域:
- 材料科学 材料科学 材料科学
- 环境化学环境化学
- 化学工程是化学工程的重要组成部分.
背景情况:
- 吸烟烟尾 (SCB) 是一个重要的全球废物流.
- SCB具有高碳含量,适合转化为增值材料,如活性炭 (AC).
- 热解和激活是将废物转化为功能吸附剂的关键过程.
研究的目的:
- 为了研究SCB的热解和炭化形成.
- 为了描述从SCB中衍生出来的活性炭.
- 为了评估合成的AC的Cr (VI) 吸附性能.
主要方法:
- 热重力测量分析 (TGA) 使用不同的加热速率 (515 °C/分钟).
- 使用Kissenger-Akahira-Sunose (KAS),Starink (STK) 和Ozawa-Flynn-Wall (OFW) 模型进行运动分析.
- 氧化 (KOH) 激活煤炭以产生AC.
- 批量吸附实验以确定Cr (VI) 去除能力,使用朗穆尔模型.
主要成果:
- 动力学分析为碳形成提供了热力学参数.
- KOH激活产生了具有BET表面积为433 m2/g和微孔体积为0.25 cm3/g的AC.
- 电流表现出最大的Cr (VI) 吸附能力 (Qmax) 为55.8 mg/g.
结论:
- SCB是生产活性炭的可行前体.
- 合成的AC显示出从水溶液中去除Cr(VI) 的巨大潜力.
- 这项研究提供了一种可持续的废物管理和水净化方法.
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