采用当地可用的中和材料的混合媒体方法,用于酸性矿井排水的被动处理
Joshua Pocaan1, Casey Oliver A Turingan1, Carlito Baltazar Tabelin2,3
1Center for Engineering and Sustainable Development Research, De La Salle University, 2401 Taft Avenue, Malate, Manila, 1004, Philippines.
Heliyon
|February 13, 2025
概括
使用石灰岩,低级矿石,飞灰和混凝土废物的混合介质对酸性矿井排水 (AMD) 的被动处理具有前景. 优化的混合物中和了pH值,并去除了金属,但硫酸盐的去除仍然是一个挑战.
科学领域:
- 环境工程 环境工程
- 地质化学 地质化学
- 水处理 处理水的方法
背景情况:
- 酸性矿井排水 (AMD) 带来了重大的环境挑战,需要有效和可持续的处理策略.
- 被动处理系统为主动方法提供了一种低影响的替代方案,特别是在旧矿区.
- 之前的研究表明,在AMD处理中使用单个废物进行部分金属和硫酸盐去除.
研究的目的:
- 研究一种混合媒介方法,用于加强酸性矿井排水的被动处理.
- 优化石灰石,低级矿石,飞灰和混凝土废物的组成,用于AMD修复.
- 评估混合介质在中和AMD和去除重金属和硫酸盐方面的有效性.
主要方法:
- 响应表面方法 (RSM) 用于设计20个独特的混合媒体组合.
- 实验室规模的实验使用模拟的AMD进行,以评估治疗性能.
- 监测的关键参数包括pH值,氧化降解潜力 (Eh),电导率 (EC),以及金属和硫酸盐度.
主要成果:
- 为被动性AMD治疗确定了三个优化的混合媒体组合.
- 优化的混合物有效地中和了模拟的AMD的pH值,并去除了大多数重金属.
- 废水质量符合菲律宾标准的大部分参数,除了硫酸盐度.
结论:
- 使用易于获得的废物材料的混合媒体方法为AMD被动处理提供了一个可持续的策略.
- 与单个材料相比,优化的组合可以显著改善pH值和重金属去除.
- 需要进一步的研究来提高硫酸盐去除效率,以满足严格的环境法规.
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