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首页> 外文期刊>Journal of the Brazilian Chemical Society >Electrochemical degradation of diuron in chloride medium using DSA? based anodes
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Electrochemical degradation of diuron in chloride medium using DSA? based anodes

机译：使用DSA？在氯化物介质中对敌草隆进行电化学降解阳极

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This work presents a study of the electrochemical degradation of the herbicide diuron using Ti/Ru xTi(1-x)O2 and Ti/Ir xTi(1-x)O2 (x = 0.3, 0.5 and 0.7) anodes. The investigation of the degradation was conducted in the presence and in the absence of chloride. The study of the herbicide removal as a function of the current density in the absence of chloride yielded 41 and 49% COD (chemical oxygen demand) removals and 10 and 14% TOC (total organic carbon) removal at 100 mA cm-2, respectively. By keeping the electrolysis time constant (4 h), Ti/Ru0.7Ti0.3O2 anode composition was determined as the most active for removal of diuron and its byproduct. The maximum removal value achieved after 4 h was 58%. Addition of chloride doubled the removal ratio, and 100% COD removal was obtained for Ti/Ru0.3Ti0.7O2. High-performance liquid chromatography (HPLC) analysis confirmed the total removal of the herbicide in chloride medium and indicated the formation of byproducts. The generated byproducts presented as function of the applied current density and the anode composition. Ir-based anodes promoted milder oxidation and furnished more byproducts in aqueous medium.
机译：这项工作提出了使用Ti / Ru xTi（1-x）O2和Ti / Ir xTi（1-x）O2（x = 0.3、0.5和0.7）阳极对除草剂杜隆进行电化学降解的研究。在有无氯化物的条件下进行降解的研究。在无氯的情况下，除草剂去除量与电流密度的关系研究表明，在100 mA cm-2下，去除率分别为41％和49％（化学需氧量）和10％和14％TOC（有机碳总量）。 。通过保持恒定的电解时间（4 h），Ti / Ru0.7Ti0.3O2阳极组合物被确定为最有效的对杜伦及其副产物的去除方法。 4小时后达到的最大去除值为58％。氯化物的添加使去除率加倍，Ti / Ru0.3Ti0.7O2的COD去除率达到100％。高效液相色谱（HPLC）分析确认了除草剂在氯化物培养基中的全部去除，并表明了副产物的形成。所产生的副产物是所施加电流密度和阳极组成的函数。铱基阳极促进了温和的氧化，并在水性介质中提供了更多的副产物。

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