从水溶液中有效吸附双A,使用酸辅助的化
Hao Li1,2, Xiangyi Gong3,4, Dekang Meng1
1School of Resource and Environmental Engineering, Wuhan University of Science and Technology, Wuhan, 430081, China.
Environmental science and pollution research international
|November 18, 2023
概括
雪松叶的生物炭有效地消除了内分泌干扰物双A (BPA). 这种低成本的材料具有很高的吸附能力和可重复使用性,使其成为BPA污染水的有希望的解决方案.
科学领域:
- 环境科学 环境科学
- 材料科学 材料科学 材料科学
- 化学工程是化学工程的重要组成部分.
背景情况:
- 双A (BPA) 是一种在水中发现的内分泌干扰物.
- 需要有效和可持续的方法来去除BPA.
研究的目的:
- 为了准备和表征树叶生物炭 (PSAC) 用于去除BPA.
- 为了研究BPA对PSAC的吸附动力学,异温和机制.
- 评估PSAC对BPA吸附的可重复使用性.
主要方法:
- 雪松树叶被转化为生物炭 (PSAC) 使用两步酸辅助的热水碳化和激活方法.
- 进行了批量吸附实验,以研究BPA去除效率,动力学和异热量.
- 对PSAC的表征涉及表面积和毛孔容量分析.
- 进行了吸附-脱附周期,以评估可重复使用性.
主要成果:
- 这种PSAC具有很高的特定表面积 (994.21 m2/g) 和微孔能力 (0.307 cm3/g).
- 对BPA的最大吸附能力为247.42mg/g,遵循伪二阶动力学和Sips异温模型.
- 吸附是一种自发的内热过程,受度,温度,pH值和吸附剂剂量的影响.
- 在四个循环后,PSAC保持了82.6%的吸附能力,这表明它的可重复使用性很好.
结论:
- 雪松叶生物炭 (PSAC) 是一种高效的吸附剂,可以从水中去除双A (BPA).
- 吸附机制涉及孔隙填充,结合,π-π相互作用和粒子内部扩散.
- PSAC提供了一种可持续的,低成本的,可重复使用的解决方案,用于从污染水源中去除内分泌干扰物.
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