在ZVI和AC协同修复下,通过光谱诱导极化去除追踪Cr(VI)
Xinmin Ma1, Jiaming Zhang2, Chen Chao1
1School of Civil Engineering, Shandong University, Jinan, 250061, China.
Environmental research
|December 28, 2024
概括
零价值铁 (ZVI) 和活性炭 (AC) 的复合物与沙子显著增强了透反应屏障 (PRB) 中的Cr (VI) 去除. 频谱诱导极化 (SIP) 有效地监测这些材料的协同修复性能.
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:
- 透反应屏障 (PRBs) 对于现场地下水整治至关重要.
- 了解PRB材料的长期性能和结构演变对于有效的污染整治至关重要.
- 目前的方法缺乏全面的洞察力,了解PRB材料在修复过程中的动态变化.
研究的目的:
- 研究零价值铁 (ZVI),活性炭 (AC) 和它们与砂的复合物在去除六价值 (CrVI) 的有效性.
- 在PRB系统中评估ZVI和AC在Cr(VI) 整治中的协同效应.
- 探索光谱诱导极化 (SIP) 的应用,以监测修复过程和物质变化.
主要方法:
- 模拟PRB条件的列实验.
- 频谱诱导极化 (SIP) 用于实时监测反应性材料.
- 水的化学分析以确定Cr (VI) 度.
- 扫描电子显微镜与能量分散式X射线光谱 (SEM-EDS) 和X射线光电子光谱 (XPS) 分析材料结构和组成.
主要成果:
- 与沙子+ZVI (36.2%) 和沙子+AC (19.5%) 相比,沙子+ZVI+AC复合物实现了显著更高的Cr(VI) 去除率 (90.3%),这表明了强大的协同效应.
- SIP监测显示,ZVI + AC复合物的充电能力和缩放放松时间大幅减少,与增强的补救相关联.
- SIP参数,特别是可充电性,与Cr (VI) 去除率有很强的相关性,证明了它们在评估PRB性能方面的实用性.
结论:
- 在Cr(VI) 整治中,ZVI和AC表现出协同作用,显著提高了透性反应屏障的性能.
- SIP技术是一种有前途的非侵入性工具,用于监测PRB中反应性材料的结构演变和性能.
- 这项研究为优化PRB设计和监测策略提供了有价值的见解,以有效地修复Cr (VI) 污染.
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