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废岩颗粒大小对酸矿排水产生的影响:对反应式运输建模的实际含义

Junghyun Lim¹, Karine Sylvain², Thomas Pabst³

¹Department of Energy Systems Engineering, Seoul National University, Seoul, Republic of Korea.

Journal of contaminant hydrology

|September 12, 2024

概括

矿山废物岩石颗粒大小显著影响酸性矿山排水 (AMD) 的产生. 较小的颗粒更快地氧化和中和,这是预测环境风险和改进回收策略的关键发现.

科学领域:

地质化学地质化学
环境科学环境科学
采矿工程采矿工程采矿工程

背景情况:

由于矿物学和颗粒大小的变化,矿山废岩带来了环境挑战,复杂化了酸性矿山排水 (AMD) 预测.
精确地质化学建模废岩行为对于有效的环境管理和回收至关重要.
将实验室动态数据扩展到现场预测需要理解数值参数扩展.

研究的目的:

为了研究颗粒大小分布对矿山废岩的地化学行为的影响.
用实验室动力测试校准反应式运输模型,以准确预测AMD的产生.
开发改进的方法,将实验室结果推断到现场规模的废岩环境中.

主要方法:

将三种不同的废物岩石分离成各种颗粒大小的碎片.
实验室动力测试用于测量随时间推移的pH值和金属度.
使用实验数据对反应式运输模拟进行校准,以确定有效的运动速率常数.

主要成果:

反应式运输模拟准确地重现了颗粒大小对pH和硫酸盐/生产的影响.
发现废岩的氧化和中和率随着颗粒大小的增加而下降.
一个加权几何平均值模型有效地估计了整个样本的动力率,超过了其他测试模型.

结论:

颗粒大小是控制矿山废物岩石的地化学动力学的关键因素.
校准的反应式运输模型提供了一个可靠的工具,用于预测废岩产生的AMD.
这项研究为基于实验室动力学数据的更准确的现场规模预测提供了途径.

关键词:

酸矿井排水系统酸矿井排水系统我的废物岩石是我的废物岩石.矿物质的有效运动速率常数.颗粒大小分布颗粒大小分布反应式运输建模反应式运输建模

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