从煤矿水中去除化物,使用通过机械化学过程制备的新型聚合物改性活性炭
Yixiang Bao1, Yonghui Qi2, Qiao Li1
1State Key Laboratory of Water Resource Protection and Utilization in Coal Mining, National Institute of Clean and Low Carbon Energy, Beijing 102209, China.
Journal of environmental sciences (China)
|July 5, 2024
概括
一种新的机械化学方法有效地使用聚合改性粉末活性碳 (PAC) 从煤矿水中去除化物. 与传统方法相比,这种可持续的方法提供了快速吸附和显著降低碳排放.
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:
- 煤矿废水的脱化对于中国西部煤炭行业的可持续发展至关重要.
- 现有的化物去除方法经常面临效率和环境影响方面的挑战.
研究的目的:
- 开发一种新的一步机械化学方法,用于制备聚合改性粉末活性炭 (PAC).
- 为了研究这种修改后的PAC在从煤矿水中去除化物的有效性.
- 将机械化学方法的环境足迹与传统方法进行比较.
主要方法:
- 采用一种易于固态相反应,在1:15的重量比率下使用聚化 (PACl) 或聚铁化 (PAFC) 稳定地加载到PAC上.
- 对修改后的PAC (C-PACl和C-PAFC) 的吸附动力学和吸附能力进行了评估.
- 描述包括元素映射,原子组成分析和密度功能理论 (DFT) 计算,以阐明吸附机制和稳定性.
主要成果:
- 对于C-PACl和C-PAFC,在5分钟内达到化物吸附平衡,吸附率高.
- 由于Al-F和Al-F-O键的结合能量的增加,C-PACl表现出更高的化物吸收能力.
- 与水热方法相比,机械化学过程导致碳排放量显著降低 (7.73公斤CO2-eq/公斤吸附剂).
结论:
- 一步机械化学方法为制备聚合改性PAC以去除化物提供了有效和快速的途径.
- 修改后的PAC表现出极好的稳定性和高化物吸附效率,其中C-PACl表现出卓越的性能.
- 这种可持续的方法为处理煤矿废水提供了一个有希望的低碳替代方案.
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