PDF(Pubmed)
Abstract：
The qualitative impact of pollutants on water quality is mainly related to their nature and their concentration, but in any case, they determine a strong impact on the involved ecosystems. In particular, refractory organic compounds represent a critical challenge, and several degradation processes have been studied and developed for their removal. Among them, heterogeneous Fenton treatment is a promising technology for wastewater and liquid waste remediation. Here, we have developed mono- and bimetallic formulations based on Co, Cu, Fe, and Mn, which were investigated for the degradation of three model organic dyes (methylene blue, rhodamine B, and malachite green). The treated samples were then analyzed by means of UV-vis spectrophotometry techniques. Bimetallic iron-based materials achieved almost complete degradation of all three model molecules in very short time. The Mn-Fe catalyst resulted in the best formulation with an almost complete degradation of methylene blue and malachite green at pH 5 in 5 min and of rhodamine B at pH 3 in 30 min. The results suggest that these formulations can be applied for the treatment of a broad range of liquid wastes comprising complex and variable organic pollutants. The investigated catalysts are extremely promising when compared to other systems reported in the literature.
摘要：
污染物对水质的定性影响主要与其性质及其浓度有关,但无论如何,它们决定了对相关生态系统的强烈影响。特别是,难熔有机化合物代表了一个关键的挑战，并且已经研究和开发了几种降解过程来去除它们。其中,非均相Fenton处理是一种有前途的废水和液体废物修复技术。这里,我们开发了基于Co的单金属和双金属配方，Cu,Fe,Mn,对三种模型有机染料(亚甲基蓝，罗丹明B,和孔雀石绿）。然后通过UV-vis分光光度法技术分析处理的样品。双金属铁基材料在非常短的时间内实现了所有三种模型分子的几乎完全降解。Mn-Fe催化剂产生了最佳配方，在pH5下5分钟内几乎完全降解了亚甲基蓝和孔雀石绿，在pH3下30分钟内几乎完全降解了罗丹明B。结果表明,这些制剂可用于处理包含复杂和可变有机污染物的大范围液体废物。与文献中报道的其它体系相比,所研究的催化剂是非常有前途的。
