维维亚尼特从无氧地下水逆透缩物中回收
Roos Goedhart1, Nienke Koudijs2, Mark C M van Loosdrecht3
1Water Management Department, Faculty of Civil Engineering and Geosciences, Delft University of Technology, Stevinweg 1, 2628 CN, Delft, the Netherlands.
Water research
|July 2, 2025
概括
从地下水和反透 (RO) 缩物中回收铁是通过vivianite沉可能的. 这种方法有效地去除铁和,但的共同去除阻碍了铁的回收.
科学领域:
- 环境化学环境化学
- 水处理技术水处理技术
- 材料科学 材料科学 材料科学
背景情况:
- 膜技术对于扩大水源至关重要,但产生缩流.
- 这些缩流中含有有价值的资源,包括高度的铁.
- 这些缩流的处置带来了环境挑战.
研究的目的:
- 为了研究从地下水和无氧逆透 (RO) 缩物中回收铁.
- 为了评估在vivianite沉过程中二价离子 (Mn2+,Mg2+,Ca2+) 的共同去除.
- 描述铁回收过程中形成的沉物.
主要方法:
- 维维亚尼特沉被用于铁的回收.
- 使用X射线衍射 (XRD) 和扫描电子显微镜 (SEM) 来进行沉物表征.
- 这项研究分析了各种地下水矩阵和RO度中的铁和双价离子去除效率.
主要成果:
- 维维安岩的沉实现了高铁 (Fe2+) 去除 (在地下水中高达89%,在RO度中高达52%).
- 观察到大量的 (Mn2+) 联合去除 (高达91%) 和有限的 (Mg2+) 联合去除 (高达7%),但不影响铁的去除.
- (Ca2+) 共同沉形成无形酸盐,对铁的回收产生负面影响.
结论:
- 维维亚尼特沉显示出从各种地下水源和RO度中回收铁的潜力.
- 该方法对管理具有挑战性的缩物流充满希望.
- 需要进一步的研究来优化vivianite沉以有效地回收铁和共同去除目标离子.
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