Abstract

In this work, a new combination of oxidation treatments for the degradation of bisphenol A (BPA) is investigated. This innovative wastewater (WW) treatment includes the use of ferrate (FeO₄²⁻) and its decomposition byproducts under dark and UVA irradiation. The oxidation by ferrate leads to a fast but incomplete degradation of BPA with a degradation extent of 45% after 60 min under adopted experimental conditions. However, the ferrate decomposition byproducts which are constituted by solid iron species can be used to further improve the pollutant degradation efficiency. Indeed, ferrate-mediated heterogeneous photo-Fenton process is employed for the first time to enhance the degradation of BPA. With respect to the application for wastewater treatment, UVA irradiation (which is part of solar light), non-toxic and natural origin compounds such as ascorbic acid (AA) and ethylenediamine-N,N′-disuccinic acid (EDDS), are used to design a sustainable process. Under optimized conditions, the degradation extent of BPA using this newly designed treatment reaches almost 100% with AA and 70% with EDDS. In order to assess the feasibility of this treatment, the ferrate-mediated photo-Fenton process is applied to treat municipal wastewater. The obtained results in WW are highly encouraging since a maximum BPA degradation extent of 63% and 60% is observed after 300 min by using AA and EDDS, respectively.

中文翻译：

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使用多价铁物种的创新型去污处理：从基础研究到在城市废水中的应用。

摘要

在这项工作中，研究了氧化处理降解双酚A（BPA）的新方法。这种创新的废水（WW）处理包括使用高铁酸盐（FeO ₄ ^2-）及其在黑暗和UVA辐射下的分解副产物。高铁酸盐的氧化导致BPA快速但不完全降解，在采用的实验条件下60分钟后降解程度为45％。然而，由固态铁物质构成的高铁酸盐分解副产物可用于进一步提高污染物降解效率。实际上，首次采用高铁酸盐介导的异质光芬顿法来增强BPA的降解。关于废水处理的应用，使用了UVA辐射（属于太阳光的一部分），无毒且天然来源的化合物，如抗坏血酸（AA）和乙二胺-N，N'-二琥珀酸（EDDS）。设计一个可持续的过程。在优化条件下，使用这种新设计的处理方法，BPA的降解程度在AA几乎达到100％，在EDDS中达到70％。为了评估该处理的可行性，将高铁酸盐介导的光芬顿法用于处理城市废水。在WW中获得的结果令人鼓舞，因为300分钟后使用AA和EDDS分别观察到最大的BPA降解程度为63％和60％。