PRB零价铁材料处理低浓度含铀废水失效影响因素及机理初探

Influencing Factors and Mechanism of Zero Valent Iron Permeable Reactive Barrier for Treating Low Concentration Uranium-containing Wastewater

为解决和减轻反应材料失效对可渗透反应墙(PRB)技术应用的限制,依托某矿山矿井坑道水PRB处理技术,以零价铁为反应墙填充材料,对近中性、低浓度含铀废水处理过程进行研究,设计了槽式试验装置,并对反应后的水质及零价铁表面的沉淀物进行元素化学分析、XRD、电镜和电子探针表征,阐述了水体中引起矿物沉淀的两类物质,并对沉淀机理进行了分析。研究结果可为PRB设计及延长运行寿命提供参考。

To solve the problem and reduce the passivation restrictions on permeable reactive barrier(PRB) technology application, relying on PRB treatment technology of effluent water from a mine, by zero-valent iron block filler material to conduct the thorough research to the neutral and low concentration of uranium wastewater treatment process, the groove test apparatus was designed, the water quality and zero-valent iron deposits on the surface were analyzed by chemical analysis, XRD, electron microscope and electron probe characterization, two substances seriously causing mineral precipitation in polluted water are described. The results can provide reference for the design of PRB and the improvement of its service life.