研究棉花基生物炭的吸附机制和性能
Qiushuang Cui1, Yong Huang1,2, Xufei Ma3
1State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources, College of Chemistry, Xinjiang University, Urumqi 830017, China.
Molecules (Basel, Switzerland)
|January 8, 2025
概括
来自棉花茎的两种生物炭类型有效地去除污染物. 盐方法在去除大型四环素分子方面表现出色,而浸方法对小的甲蓝色染料来说更好.
科学领域:
- 环境化学环境化学
- 材料科学 材料科学 材料科学
背景情况:
- 药品和染料污染废水造成环境风险.
- 生物炭 (BC) 是一个有前途的吸附剂,用于污染物去除.
- 优化生物炭生产方法对于高效的废水处理至关重要.
研究的目的:
- 使用KOH激活,从棉花茎中生产和比较两种类型的生物炭 (BC).
- 调查BC的吸附性能和去除四环素 (TC) 和甲基蓝 (MB) 的BC的机制.
- 为了确定不同BCs对于特定污染物类型的适用性.
主要方法:
- 通过盐和浸方法使用KOH激活剂从棉花茎中生产了两种生物炭 (BC).
- 描述BC的多孔性,表面积和孔积.
- 用动力和异热模型分析的TC和MB去除的吸附实验.
主要成果:
- 这两种BC都表现出发达的微孔和中孔结构.
- 盐BC (KBCM-900) 的表面积 (3095 m2/g),孔隙大小和体积都较大.
- 在KBCM-900中,通过912.212 mg/g的吸附,获得了>95%的TC去除,而KBCI-900在MB去除 (723.726 mg/g) 中表现出色.
结论:
- 生物炭生产方法显著影响吸附性能和污染物选择性.
- 盐BC对TC等大分子有效,而浸BC适合MB等小分子.
- 吸附机制包括孔隙填充,π-π相互作用,结合和静电相互作用.
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