在富含纤维素和富含素的生物炭上,Cr (VI) 的不同光还原过程
Zhengyang E1, Jianjun Liang2, Yaqiong Dong1
1Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, 730000, China; Key Laboratory of Petroleum Resources, Gansu Province, Lanzhou, 730000, China; University of Chinese Academy of Sciences, Beijing, 100049, China.
Environmental research
|August 4, 2023
概括
帕克乔伊衍生生物炭 (PBC) 和玉米衍生生物炭 (CBC) 被烧解以研究 (VI) 光还原. PBC300显示了最高的效率,证明了生物炭的效率.
科学领域:
- 环境科学 环境科学
- 材料科学 材料科学 材料科学
- 光催化作用的光催化
背景情况:
- 六价 (Cr(VI)) 是一种有毒的重金属污染物.
- 来自生物质的生物炭为环境修复提供了潜力.
- 了解生物炭的光还原能力对于其应用至关重要.
研究的目的:
- 通过使用来自pakchoi (PBC) 和玉米 (CBC) 的生物炭来研究Cr(VI) 的光降解.
- 为了确定Cr(VI) 光还原的最佳热解条件.
- 阐明不同生物炭成分和反应机制的作用.
主要方法:
- 在不同温度下从pakchoi和玉米制备生物炭.
- 使用X射线光电子光谱学 (XPS) 和富里埃变换红外光谱学 (FTIR) 的表征.
- 在不同条件下对Cr(VI) 光还原效率和容量的评估.
主要成果:
- 在300°C (PBC300和CBC300) 烧解的生物炭表现出最佳的Cr (VI) 光还原性能.
- 与CBC300相比,PBC300显示出更高的效率 (1.3倍),容量分别为68.2毫克g-1和66.1毫克g-1.
- 溶解的黑碳对光还原有显著的贡献,特别是在CBC中,界面电子转移是主要的机制.
结论:
- 生物炭,特别是PBC300,对于Cr (VI) 光还原是有效的.
- 热解温度和原料成分影响生物炭的性能.
- 介面电子运输和溶解的黑碳是Cr (VI) 生物炭光降解的关键因素.
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