渗透反应格栅技术综述：填充材料实验研究、修复技术实例和系统运行寿命

Review of permeable reactive barrier technology:The experimental study of filling materials,the example of remediation technology,and the longevity of the system

渗透反应格栅(PRB)相对于传统的抽出处理技术是一种新兴的原位处理技术,在大多数情况下,它的运行不依靠外部力量或能源的输入,而是应用原位的地下水流来带动污染物与反应材料接触,最终将污染物去除.本文以地下水中六价铬(Cr(Ⅵ))去除为例,总结了PRB材料筛选过程;介绍了部分PRB场地应用实例,包括不同材料、结构类型、尺寸和PRB处理目标污染物的效果,及以零价铁(Fe0)为填充介质的PRB寿命研究现状.Fe0是实际场地PRB和实验室PRB材料研究中应用最广的材料.维持渗透反应墙的活性和渗透性能,是PRB能长期有效运行的重要条件.详细了解反应墙对污染物的去除机理,对于评价PRB的长期运行效果至关重要.

Permeable reactive barrier（PRB） is a burgeoning technology compared with the traditional pump-treat technology.In most cases, it removes the pollutant by relying on the groundwater flow to drive the contact of pollutants with the reactive materials without the input of external force and energy.Using Cr（Ⅵ） removed in groundwater as an example,this paper summarized the selection process of the filling material,described some PRB applications including the materials,structure type,size and the treatment efficiency,and discussed the current situation of the longevity of Fe0-PRB.Zero valence iron is the most common material used in the experimental research and field project.It is significant to maintain the activity and permeability of the PRB.Theunderstanding of removal mechanism of the contaminant is essential to evaluate the long-time running effectiveness of PRB.