作为Cr (VI) 去除的有效和经济材料的醇功能化黑碳:同时吸附和减少
Kamonchanok Huangmee1, Liang-Ching Hsu1, Yu-Min Tzou2
1Department of Soil and Environmental Sciences, National Chung Hsing University, Taichung, 40227, Taiwan.
Journal of environmental management
|May 16, 2024
概括
硫醇功能化黑碳 (S-BC) 有效地从水中去除危险的六价 (Cr(VI)). 这种可持续的方法增强了Cr6的吸收,并将其转化为毒性较低的Cr3物种.
科学领域:
- 环境化学环境化学
- 材料科学 材料科学 材料科学
- 整治技术 整治技术
背景情况:
- 六价 (Cr(VI)) 对环境和公共健康构成重大风险.
- 有效的整治策略对于减轻Cr6污染至关重要.
- 从草残留物中提取的黑碳 (BC) 是一种丰富且潜在的有用材料.
研究的目的:
- 开发一种使用醇功能化黑碳 (S-BC) 去除Cr6的高效方法.
- 研究S-BC.的吸附能力和Cr (VI) 降解能力.
- 探索S-BC作为可持续整治材料的潜力.
主要方法:
- 黑碳 (BC) 的醇功能化,使用80°C的甘油酸 (TGA) 在8小时内.
- 用1:40 (S-BC40) 的BC-TGA比率准备S-BC样本.
- 在不同的pH值 (3.5,5.5,7.5) 评估Cr(VI) 吸附能力和物种化分析.
主要成果:
- 与BC相比,S-BC40的Cr (VI) 吸附能力显著提高 (201.23 mg g-1在pH3.5下) BC.
- 在pH值≥5.5.5的情况下,S-BC40实现了被吸收的Cr(VI) 到Cr(III) 物种的完全转化.
- 仅BC在pH3.5和7.5时就保留了约13%的Cr (VI),而S-BC则确保了完全的减少.
结论:
- 醇功能化是一种高度有效的策略,用于提高BC的Cr (VI) 修复性能.
- S-BC提供优越的Cr6吸附和完全的降解到Cr3,超过未经修改的BC.
- 开发的S-BC为Cr(VI) 清除和废物回收提供了具有成本效益和可持续的解决方案.
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