Sapiña M, Jimenez-Relinque E, Castellote M
Institute of Construction Science "Eduardo Torroja" IETcc, CSIC, C/Serrano Galvache, 4, 28033, Madrid, Spain.
Environ Sci Pollut Res Int. 2014 Oct;21(20):12091-8. doi: 10.1007/s11356-014-3167-2. Epub 2014 Jun 14.
This paper explores the potential of a hazardous waste of difficult management, electric arc furnace dust (EAFD), as photocatalytic material. Starting from a real waste coming from a Spanish steel factory, chemical, mineralogical, and optical characterizations have been carried out. Direct trials on EAFD and mortar containing this waste have been performed to evaluate its potential as photocatalyst itself and within a cementitious material. The analysis of photocatalytic properties has been done by two different methods: degradation of NO x and degradation of rhodamine (RhB). As a result, it can be said that EAFD exhibited photocatalytic activity for both configurations with UV and visible light, having the mortar enhanced photocatalytic activity for NO x with respect to the EAFD itself. Additionally, in direct trials on the EAFD, it has been able to degrade RhB even in the dark, which has been attributed to transfer of electrons between the adsorbed RhB and the conduction band of some oxides in the dust.
本文探讨了一种难以管理的危险废物——电弧炉粉尘（EAFD）作为光催化材料的潜力。从一家西班牙钢铁厂产生的实际废物出发，进行了化学、矿物学和光学表征。对EAFD以及含有这种废物的砂浆进行了直接试验，以评估其作为光催化剂本身以及在胶凝材料中的潜力。通过两种不同方法对光催化性能进行了分析：氮氧化物降解和罗丹明（RhB）降解。结果表明，EAFD在紫外光和可见光两种配置下均表现出光催化活性，相对于EAFD本身，砂浆对氮氧化物具有增强的光催化活性。此外，在对EAFD的直接试验中，它甚至在黑暗中也能够降解RhB，这归因于吸附的RhB与粉尘中某些氧化物的导带之间的电子转移。
