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基于球磨硫化物铁铜双金属的复合透气材料,用于去除Cr (VI):制剂参数和动力学研究的影响

Zhenghan Yang¹, Guoyu Ding², Lili Yan¹

¹School of Chemistry and Chemical Engineering, Shanghai University of Engineering Science, Shanghai, 201620, PR China.

|July 9, 2023

概括

这项研究开发了一种由硫化铁铜双金属组成的环保复合材料,用于地下水整治. 优化的材料通过还原和化学吸收有效地去除六价 (Cr(VI),为透反应屏障 (PRB) 提供了有前途的解决方案.

科学领域:

环境科学环境科学
材料科学材料科学材料科学
地质化学地质化学

背景情况:

零价值铁 (ZVI) 对于地下水整治是有效的,但由于透率低,在透反应屏障 (PRB) 应用中面临挑战.
粉末ZVI材料具有较差的水透性和使用率,限制了它们在PRB中的直接应用.
开发具有增强性能的新型环保材料对于有效的地下水整治至关重要.

研究的目的:

为从地下水中去除六价 (Cr(VI)) 准备和优化一种新型复合性透气材料.
调查影响PRB应用复合材料性质和性能的制备参数.
为了阐明优化复合材料的Cr(VI) 去除机制和动力学.

主要方法:

硫化铁铜双金属是使用环保的球磨技术合成的.
通过将双金属与污泥和高烧结,制造出一种复合透气材料,优化了污泥含量,颗粒大小和烧结时间等参数.
材料表征涉及SEM-EDS,XRD和FTIR;性能通过液压导电性,硬度和Cr (VI) 去除的柱体实验来评估.

主要成果:

确定了双金属和复合材料的最佳制备参数,产生高液压导电性 (1.732厘米/秒) 和硬度 (50).
复合材料表现出有效的Cr6去除,其容量分别为0.54,0.39和0.29 mg/g,pH为5,7和9.
VI的去除主要是通过减少 (伪第一阶动力学) 和化学吸收 (伪第二阶动力学) 来发生,在不同的pH条件下,VI/III的比率相似.

结论:

开发的硫化铁铜双金属复合材料为地下水整治中的PRB应用提供了高度透和有效的反应性材料.
优化的准备可以显著提高液压导电性和硬度,这对于实际的PRB实施至关重要.
该材料的双重去除机制 (减少和化学吸收) 确保在各种环境条件下高效的Cr6修复.

关键词:

球磨机球磨机球磨机复合性透气材料是一种复合性透气材料.六价的六价是一种运动学研究运动学.硫化物是铁铜双金属的硫化物.

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