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废水处理以去除二氧化碳的废水处理

Vhahangwele Masindi^1,2, Spyros Foteinis³, Phil Renforth³

¹Magalies Water, Scientific Services, Research & Development Division, Erf 3475, Stoffberg street, Brits 0250, South Africa.

|November 6, 2023

概括

富含的废水处理废水被二氧化碳 (CO2) 矿化,形成稳定的碳酸盐矿物质. 这种创新方法提供了二氧化碳去除 (CDR),并提高了水质,创造了循环经济的机会.

科学领域:

环境工程环境工程
地质化学地质化学
材料科学材料科学材料科学

背景情况:

污水处理对全球温室气体 (GHG) 排放 (1-2%) 贡献很大.
在现有基础设施中制定二氧化碳去除 (CDR) 策略对于减缓气候变化至关重要.

研究的目的:

研究利用富含 (Ca) 的废水废水来通过矿化去除二氧化碳 (CDR) 的潜力.
描述形成的碳酸盐矿物质,并评估这种CDR方法的可行性.

主要方法:

在市政废水中的 (P) 恢复系统中利用的富含的废水.
用缩的二氧化碳泡泡了废水,以诱导矿化.
分析矿物质特性使用里叶变换红外光谱 (FTIR),X射线光 (XRF),扫描电子显微镜与能量分散式X射线光谱 (SEM-EDX),聚焦离子束扫描电子显微镜 (FIB-SEM),传输电子显微镜 (TEM) 和X射线衍射 (XRD).

主要成果:

合成了高质量的碳酸 (CaCO3) 矿物质,主要是阿拉贡石和石.
FTIR证实了碳酸盐键,XRF/SEM-EDX表示高度,SEM/FIB-SEM/TEM显示均分布和特有的矿物结构.
该过程改善了废水质量,提供了回收水的好处.

结论:

废水污水可以有效地用于碳矿化,将二氧化碳封存到稳定的碳酸盐矿物质中.
该方法为减少废水处理的碳足迹提供了一个可持续的范式,并为材料价值化和循环经济提供了机会.
这种方法可能适用于其他性含丰富的废水,例如钢的液.

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