通过与碳酸盐和铁氧化矿物质的共同沉去除:有机复合剂的作用
Andreea Elena Maftei1, Alecsandra Lupu2, Juan Diego Rodriguez-Blanco3
1Department of Exact Sciences and Natural Sciences, Institute of Interdisciplinary Research, "Alexandru Ioan Cuza" University of Iași, 11, Carol I Bvd, 700506 Iași, Romania.
The Science of the total environment
|February 2, 2025
概括
铁氧化有效地通过共降和吸附从废水中去除有毒的 (VI),在有机化合物存在时具有更好的稳定性. 这项研究有助于制定先进的废水清除污染战略,以确保环境安全.
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:
- 欧洲环境法规要求到2036年降低水中的污染物限量,增加了废水清除污染的需求.
- 已知无形铁氧化 (IOH) 和碳酸 (CC) 通过共降和吸附与污染物相互作用.
研究的目的:
- 在不同的pH条件下,研究 (VI) 通过化 (FHY) 和碳酸被保留.
- 探索Cr (VI) 吸收机制,矿物转化以及有机化合物 (EDTA,EDDS) 的影响.
主要方法:
- 在酸性至基本条件下测试FHY和CC的Cr (VI) 保留.
- 用于Cr共沉降物种的地化学建模.
- 进行了毒性特征漏程序 (TCLP) 实验.
- 在Cr和有机化合物的存在下,检查了矿物质稳定性超过一年.
主要成果:
- 在接近中性的条件下,Cr (VI) 仍然固定在FHY结构中.
- 有机化合物和Cr减缓了FHY转化为晶体形式的速度.
- (VI) 被隔离为较少有毒的 (III).
- 与吸附相比,共同沉可以清除显著更高的Cr (VI) (高达97.65 mg/g) (大约97.65 mg/g) 33.76 毫克/克) 的脂肪.
结论:
- FHY表现出高的Cr (VI) 去除效率,主要是通过共降.
- 有机化合物增强了FHY的稳定性,影响了Cr的生物可用性和流动性.
- 这些发现对于管理矿区和酸性矿井排水等受污染的地点至关重要.
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