Influence of mineral water constituents, organic matter and water matrices on the performance of the H2O2/IO4--advanced oxidation process
Influence of mineral water constituents, organic matter and water matrices on the performance of the H2O2/IO4--advanced oxidation process
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DOI：
10.1039/c9ew00329k
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发表时间：
2019-11-01
影响因子：
5
通讯作者：
Ashokkumar, Muthupandian
中科院分区：
文献类型：
--
作者：
Chadi, Nor Elhouda;Merouani, Slimane;Ashokkumar, Muthupandian
我们最近报道了H2O2/IO4-反应可能是一种新的水处理高级氧化工艺（AOP） [N]。陈建军，陈建军，陈建军，高氧高碘酸盐（IO4-）降解难降解有机污染物的研究进展，环境科学进展。科学。：水资源技术浙江农业学报，2019,5(11):1113-1123。以甲苯胺蓝（TB）为模型污染物，在去离子水中进行了实验，明确了所有操作条件的影响。在这里，我们首次报道了矿泉水成分（盐）、不同种类的有机添加剂（表面活性剂、蔗糖、葡萄糖和羧酸）和水基质（天然矿泉水、海水和处理过的废水）对这种新兴AOP性能的影响。观察到，盐的存在降低了该工艺的降解效率。唯一的例外是碳酸氢盐，它显著地加速了结核病的降解率，但只有在低HCO3-浓度下。同样，有机竞争者的存在通过消耗H2O2与高碘酸盐反应产生的自由基和氧化物质，降低了TB降解的效率。有机竞争者和盐的猝灭作用随溶液浓度的增加而增加。在真实环境基质中进行的降解试验表明，当基质的pH值调整到5.4时，超过50%的工艺效率损失，但当该过程在自然pH值（类似于7.6）下运行时，观察到的损失较低。所有这些发现都是讨论和解释有关自由基形成的反应性与添加剂存在的系统。
We have recently reported that the reaction of H2O2/IO4- could be a new advanced oxidation process (AOP) for water treatment [N. E. Chadi, S. Merouani, O. Hamdaoui, M. Bouhelassa and M. Ashokkumar, H2O2/periodate (IO4-): a novel advanced oxidation technology for the degradation of refractory organic pollutants, Environ. Sci.: Water Res. Technol., 2019, 5, 1113-1123]. Experiments were conducted in deionized water using toluidine blue (TB) as a model pollutant, in which the impact of all operating conditions was clarified. Herein, we report, for the first time, the impact of mineral water constituents (salts), different kinds of organic additives (surfactants, sucrose, glucose and carboxylic acids) and water matrices (natural mineral water, seawater and treated wastewater effluent) on the performance of this emerging AOP. It was observed that the presence of salts decreased the degradation efficiency of the process. The one exception is that of bicarbonate which notably accelerated the TB degradation rate but only at low HCO3- concentration. Similarly, the presence of organic competitors diminished the efficiency of TB degradation through consuming radicals and oxidizing species generated by the reaction of H2O2 with periodate. The quenching impact of organic competitors and salts increased with their concentrations in the solution. Degradation trials conducted in real environmental matrices showed that more than 50% of the process efficacy was lost when the pH of the matrices was adjusted to 5.4, but a lower loss was observed when the process was operated at natural pH (similar to 7.6). All these findings were discussed and interpreted with regard to the reactivity of radicals formed with additives present in the system.