和的化特性和机制从石膏出水
Wanqiang Dong1, Xiangyi Deng1, Liqi Chai1
1School of Resources and Safety Engineering, Wuhan Institute of Technology, Wuhan 430205, China.
Molecules (Basel, Switzerland)
|January 11, 2025
概括
石 (PG) 浸是复杂的,酸性条件释放金属和可溶性成分影响其他. 一个关键的溶解结晶反应影响释放,指导环境风险评估和资源回收.
科学领域:
- 环境科学 环境科学
- 地质化学 地质化学
- 材料科学 材料科学 材料科学
背景情况:
- 石 (PG) 是湿处理酸生产的主要工业固体废物,由于和等杂质,造成土地利用和污染风险.
- 目前通过储存进行的处置是土地密集型的,并且在漏过程中杂质共释放的机制尚未完全理解,这阻碍了有效的管理和利用.
- 了解浸出行为对于环境风险评估和从PG中恢复资源至关重要.
研究的目的:
- 为了研究化石 (PG) 中和离子在不同颗粒大小和pH条件下的化特性.
- 阐明从PG释放金属,和的机制和关键控制因素.
- 为环境风险评估和PG资源回收提供理论指导.
主要方法:
- 静态pH化实验是在不同颗粒大小的PG样本上进行的.
- 使用视觉MINTEQ模拟来模拟漏行为.
- 使用X射线衍射 (XRD),X射线光电子光谱 (XPS) 和富里埃变换红外光谱 (FT-IR) 来进行材料特征.
主要成果:
- 酸性条件 (低pH值) 促进了Ca,Al,Fe,Ti,Ba,Sr,Y和PO43的浸出.
- ,Zn,Co和F的液主要受到PG中可溶性成分的含量的影响.
- 确定了CaSO4·H2O的动态溶解结晶反应是控制泄漏的重要因素,并通过表征技术证实了这一点.
结论:
- 在PG中,浸出行为依赖于pH值,有不同的机制控制不同元素和杂质的释放.
- CaSO4·H2O溶解结晶反应在PG中的流动性中起着至关重要的作用.
- 这项研究为管理PG的环境影响和回收宝贵的资源,如,和金属提供了必要的见解.
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