通过各种阴离子收集器净化固体废物:实验研究和理论计算
Kaizhen Wu1, Rui Li1, Xuchao Sun1
1School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan, Hubei, 430070, China.
Journal of environmental management
|March 10, 2025
概括
这项研究优化了使用逆漂浮的化石膏 (PG) 白化. 丁二甲基氨基化物 (DDBAC) 在去除有机杂质和增强PG白度方面被证明是最有效的.
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:
- 石 (PG) 是一种肥料副产品,由于杂质,它会给环境带来风险.
- 有效处理和修复PG对于污染控制至关重要.
- 在PG中对有机杂质分离和收集器优化存在有限的研究.
研究的目的:
- 通过使用逆漂浮来去除有机杂质和石英来使石白化.
- 为了评估在分离过程中各种阴离子收集器的有效性.
- 为PG回收提供有关收集器与不洁物相互作用的理论见解.
主要方法:
- 使用阴离子集体进行逆漂浮:二甲基三甲基氨基化物 (DTAC),二甲基胺 (DDA),八甲基二甲基基氨基化物 (ODBC) 和二甲基基二甲基氨基化物 (DDBAC).
- 测量白度以量化去除杂质的有效性.
- 密度功能理论 (DFT) 和分子动力学 (MD) 计算以阐明吸附机制.
主要成果:
- 在浮化后,PG白度从29.88%提高到66%.
- 对杂质的收集器吸附趋势:DDA < DTAC < ODBC < DDBAC.
- DFT/MD证实了键和二极二极相互作用;DDBAC和ODBC也显示了与芳香化合物的π-π相互作用.
结论:
- DDBAC是通过去除有机杂质来使PG变白的最有效的收集器.
- 了解收集器-杂质相互作用为PG回收提供了理论基础.
- 优化的漂浮提高了PG价值,减少了对环境的影响.
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