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调节硫化零价值铁的FeS_x组装模式:使用活性碳进行全合一接口调制

Guanjun Qu¹, Yue Zhang¹, Zhongkai Duan¹

¹Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Qingdao 266237, China.

|November 20, 2023

概括

将粉状活性炭 (PAC) 加入硫化零价值铁 (S-ZVI) 中,可以提高其去除 (VI) 的能力. 这种S-ZVI/PAC材料在废水处理和透性反应屏障中显著提高了反应性和有效性.

科学领域:

环境科学环境科学
材料科学材料科学材料科学
化学工程是化学工程的重要组成部分.

背景情况:

在硫化零价值铁 (S-ZVI) 中设计异质接口对于提高净化能力至关重要.
硫化铁 (FeSx) 的组装机制和调整S-ZVI性能的策略仍然不太清楚.

研究的目的:

通过在S-ZVI制备过程中加入粉状活性炭 (PAC) 来开发S-ZVI/PAC微粒.
调节FeSx组装模式,提高S-ZVI材料的适用性和反应性.

主要方法:

通过在S-ZVI合成过程中引入PAC来制备S-ZVI/PAC微粒.
控制的Na2S和PAC的添加序列,以控制Fe (II) 释放和FeSx组合.
与ZVI和S-ZVI相比,Cr(VI) 封存和反应性的评估.

主要成果:

S-ZVI/PAC显著增强了Cr(VI) 的反应性 (11.16倍于ZVI,1.78倍于S-ZVI).
PAC促进了FeSx的组装,提高了电子传输能力,并容纳了还原中心.
在S-ZVI上化学组装的FeSx被证明优于PAC上物理吸附的FeSx.

结论:

通过控制Na2S和PAC的添加序列,可以在S-ZVI上进行FeSx的优先化学组合.
在模拟废水和电动力学透反应屏障 (EK-PRB) 应用中,S-ZVI/PAC显示出高效率.
这项研究为环境修复中的S-ZVI目标设计提供了一种新的接口优化策略.

关键词:

Cr (VI) 的去除方法.接口组件组件是一个接口组件.微小的零价值铁在微小的尺度上是没有价值的.粉末活性炭活性炭的粉末.硫化硫化剂的存在

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