预处理方法及产地对天然黄铁矿球磨脱除Cr（VI）性能的影响

IF 6.9 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Applied Surface Science Pub Date : 2025-03-13 DOI:10.1016/j.apsusc.2025.162958

Haowei Zeng , Kuang Wang , Chengjie Xue , Wenxiao Huang , Zhanqiang Fang

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引用次数: 0

摘要

球磨天然黄铁矿已被确定为一种有效的Cr（VI）修复材料。研究了不同预碎处理方式和来源对球磨黄铁矿Cr（VI）修复效果的影响。粉碎后球磨的矿石性能较好，在3.0 g/L投加量下，kobs0 ~ 10min和kobs10 ~ 120min的脱矿效率和准一级动力学速率比锤击破碎高21.01 ~ 51.45 %。主要原因是磨粉机粉碎可以为后续球磨提供更均匀的天然黄铁矿粉，同时更大程度地降低了天然黄铁矿的抗球磨性，从而有利于后续球磨过程中矿物粒度的更大幅度降低，D50值的降低范围为0.03 ~ 3.71 μm。来自广东的矿物表现出最好的Cr（VI）去除性能，这是由于在球磨过程中保留了更多的还原性成分，并且形成了有利于反应的粗糙多孔表面。这些研究为天然黄铁矿在环境修复中的大规模应用提供了技术指导。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Influence of pre-treatment method and origin on Cr(VI) removal performance by ball-milled natural pyrite

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Influence of pre-treatment method and origin on Cr(VI) removal performance by ball-milled natural pyrite

Ball-milled natural pyrite has been identified as an efficient material for the remediation of Cr(VI). This study investigates the impact of various pre-crushing treatments and origins on the Cr(VI) remediation efficacy of ball-milled pyrite. Minerals pre-treated by pulverizer crushing and then ball-milled had better properties, the removal efficiency and pseudo-first-order kinetic rate k_obs0-10min and k_obs10-120min at the dosage of 3.0 g/L were 21.01–51.45 % higher than that pre-treated by hammer crushing. The primary reason being that pulverizer crushing can provide more uniform powdered natural pyrite for subsequent ball milling, concurrently, the ball milling resistance of natural pyrite is diminished to a greater extent, thereby facilitating a more substantial reduction in the particle size of the mineral during the subsequent ball milling process, with a reduction in the D₅₀ value ranging from 0.03 to 3.71 μm. Minerals from Guangdong demonstrated the best Cr(VI) removal performance, which was attributed to the retention of more reducing components during the ball-milling process and the formation of a rough, porous surface that was favorable for the reaction. These studies provided technical guidance for the scaled-up application of natural pyrite in environmental remediation.

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来源期刊

Applied Surface Science 工程技术-材料科学：膜

CiteScore

12.50

自引率

7.50%

发文量

3393

审稿时长

67 days

期刊介绍： Applied Surface Science covers topics contributing to a better understanding of surfaces, interfaces, nanostructures and their applications. The journal is concerned with scientific research on the atomic and molecular level of material properties determined with specific surface analytical techniques and/or computational methods, as well as the processing of such structures.