在和硫上增强的Cr (VI) 吸附功能化颗粒活性炭
Ali Bakhshi-Zadeh1, Janelle Balzer1, Negar Fahimi1
1Department of Chemical and Petroleum Engineering, University of Calgary, Calgary, T2N 1N4, Canada. sathish.ponnurangam@ucalgary.ca.
Physical chemistry chemical physics : PCCP
|January 6, 2026
概括
用和硫组功能化颗粒活性炭 (GAC) 增强了六价 (Cr(VI)) 从水中去除的作用. 修改后的GAC显示出更好的吸附能力,并促进Cr (VI) 降低到更少的有毒Cr (III).
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:
- 六价 (Cr(VI)) 对环境和健康构成重大风险.
- 颗粒活性炭 (GAC) 是一种常见的吸附剂,但其对Cr6的效率可以提高.
研究的目的:
- 研究GAC与 (N) 和硫 (S) 基的功能化,以增强Cr (VI) 吸附.
- 了解N/S功能化GAC对Cr的吸附机制和动力学.
主要方法:
- 一式热水合成,使用硫尿素来使 N 和 S 组的 GAC 功能化.
- X射线光电子光谱 (XPS) 和CHNS分析以量化N和S含量.
- 吸附异温,动力学研究和再生实验以评估性能.
主要成果:
- 与未经修改的GAC (20.5 mg g-1) 相比,N/S功能化的GAC表现出更高的Cr (VI) 吸附能力 (23.2 mg g-1).
- 吸附机制涉及结和降解-吸附,其中N/S-GAC促进Cr (VI) 降解到Cr (III).
- 吸附遵循GAC的Sips模型和N/S-GAC的Freundlich模型,表明异质吸附.
- 对于两种吸附剂,NaOH/KOH的再生比HCl更有效.
结论:
- N/S 功能化显著提高了 GAC 六价去除能力.
- 修改后的GAC促进了Cr (VI) 的减少,为减轻毒性提供了一条途径.
- 在水溶液中,N/S功能化GAC为Cr (VI) 修复提供了有前途的吸附剂.
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