从水中吸附性去除酸盐,使用与铁和氧化物修改的白树的生物炭
Yehia Manawi1, Rashad Al-Gaashani2, Simjo Simson2
1Qatar Environment and Energy Research Institute, Hamad Bin Khalifa University, Qatar Foundation, PO Box 34110, Doha, Qatar. ymanawi@hbku.edu.qa.
Scientific reports
|July 29, 2024
概括
来自Acacia tortilis的修饰生物炭有效地从水中去除酸盐. 用氧化铁和氧化进行兴奋剂显著提高了酸盐吸附能力和速度,使其成为净化水的有希望的材料.
科学领域:
- 环境科学 环境科学
- 材料科学 材料科学 材料科学
- 水处理 处理水的方法
背景情况:
- 水生环境中的酸盐污染是一个重大的环境问题.
- 传统的水处理方法去除酸盐可能是昂贵和低效的.
- 从植物废物中提取的生物炭 (BC) 显示出污染物修复的潜力.
研究的目的:
- 合成和评估一种来自 Acacia tortilis 修剪废物的新型生物炭 (BC),以去除酸盐.
- 为了研究用氧化铁 (Fe3O4) 和氧化 (MgO) 给BC进行兴奋剂对酸盐吸附的影响.
- 描述修改后的BC,并确定其吸附性能和机制.
主要方法:
- 在600°C下,Acacia tortilis的修剪废物被烧解以产生生物炭.
- 生物炭通过水热过程添加了Fe3O4和MgO纳米粒子.
- 使用不同度和pH的合成水溶液进行了酸盐吸附实验.
- 材料特征包括EDS,XRD,BET表面积分析和PZC确定.
主要成果:
- 未经修改的生物炭显示可以忽略不计的酸盐去除.
- 用Fe3O4和MgO修改的生物炭几乎完全去除了酸盐 (>97.5%在4小时内).
- 兴奋剂增加了BET表面积超过20% (从322到394m2/g),并将PZC提高到pH值5.3.
- 吸附速度很快,在30分钟内达到82.5%的去除,在pH值8.5.5时最大吸附能力为98.5mg/g.
- 酸盐吸附遵循兰格穆尔异热模型.
结论:
- 来自 Acacia tortilis 的 Fe3O4 和 MgO 合生物炭对于从水溶液中去除酸盐非常有效.
- 性能提升归因于表面积增加,表面电荷增加以及与酸盐离子的强相互作用.
- 这种改性生物炭为减轻水中的酸盐污染提供了可持续和高效的解决方案.
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