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通过机械化学合成硫化ZVI:格子兴奋剂和增强反应能力

Yuxiang Shi¹, Ruofan Li¹, Wei-Xian Zhang²

¹State Key Laboratory for Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, 1239 Siping Road, Shanghai 200092, China.

Journal of hazardous materials

|July 24, 2025

概括

通过球磨法将硫注入零价值铁 (ZVI) 中,显著增加了污染物去除. 这种增强的ZVI有效地处理六价和三乙烯,提供了一个有前途的环境修复解决方案.

科学领域:

环境科学环境科学
材料科学材料科学材料科学
化学化学化学

背景情况:

零价值铁 (ZVI) 对于环境修复至关重要.
硫剂增强了ZVI的电子特性和污染物转化能力.
传统的硫兴奋剂方法ZVI具有局限性.

研究的目的:

开发一种新的高能球磨法,用于精确地将硫应用于ZVI.
研究机械化学硫化ZVI (SZVI) 在去除六价 (Cr(VI)) 和三乙烯 (TCE) 的有效性.
了解硫合并的机制及其对ZVI结构和性能的影响.

主要方法:

采用高能球磨法合成具有控制硫含量的SZVI (0.182%5.698%).
启动了机械化学反应,以实现现场硫化铁的形成.
进行了批量实验,以评估在模拟地下水条件下的Cr (VI) 和TCE去除效率.

主要成果:

通过球磨加工制备的SZVI显示,与溶液化学方法相比,Cr (~VI) (高达20倍) 和TCE (高达7倍) 的去除率明显更高.
优化的SZVI实现了高的去除能力:130.5 mg/g的CrVI和70.1 mg/g的TCE.
鉴定证实了铁硫化物阶段 (FeS,FeS2) 的形成和ZVI网格内的Fe-S相互透.

结论:

高能球磨是一种有效和精确的方法,用于硫注射ZVI.
在去除危险的Cr (VI) 和TCE污染物方面,SZVI表现出卓越的性能.
这种方法为基于ZVI的环境修复策略提供了有希望的进步.

关键词:

Cr (VI) 和TCE的去除.格子工程格子工程机械化学机械化学硫化硫化剂的存在没有价值的铁.

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