In this study, the steel manufacturing waste Basic Oxygen Furnace Sludge (BOFS) was tested as permeable reactive material for the remediation of soil contaminated with chromium. The material presents a high content of elemental iron and iron oxides typical of the steel manufacturing process. Here we propose a scheme of the chemical reactions responsible for remediation process including BOFS dissolution, Cr(VI) reduction and Cr(III) precipitation. Batch reactors showed that Cr(VI) removal increases as the pH decreases. Column tests demonstrated that the simulated PRB with BOFS as the reactive media was quite effective for removing Cr(VI) from groundwater, with a sorption capability of 0.213 mg Cr per gram of BOFS at an initial Cr(VI) concentration of 50 mg/L at pH 5.5. A long-term test lasting 71 days confirmed the proposed mechanisms and the suitability of using BOFS in a permeable reactive barrier.

在这项研究中，对钢铁生产废碱氧气炉污泥（BOFS）作为可渗透的反应性材料进行了测试，以修复被铬污染的土壤。该材料具有钢铁制造过程中典型的高含量元素铁和氧化铁。在这里，我们提出了一种负责修复过程的化学反应方案，包括BOFS溶解，Cr（VI）还原和Cr（III）沉淀。间歇式反应器显示，随着pH值的降低，Cr（VI）的去除量也会增加。柱测试表明，以BOFS为反应介质的模拟PRB能够非常有效地去除地下水中的Cr（VI），在初始Cr（VI）浓度为50 mg / L时，其吸附能力为每克BOFS 0.213 mg Cr。在pH 5.5下。