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Electro-Fenton treatment of a complex pharmaceutical mixture: Mineralization efficiency and biodegradability enhancement.
Chemosphere ( IF 8.1 ) Pub Date : 2020-04-03 , DOI: 10.1016/j.chemosphere.2020.126659 Oleksandra Ganzenko 1 , Clément Trellu 1 , Nihal Oturan 1 , David Huguenot 1 , Yoan Péchaud 1 , Eric D van Hullebusch 2 , Mehmet A Oturan 1
Chemosphere ( IF 8.1 ) Pub Date : 2020-04-03 , DOI: 10.1016/j.chemosphere.2020.126659 Oleksandra Ganzenko 1 , Clément Trellu 1 , Nihal Oturan 1 , David Huguenot 1 , Yoan Péchaud 1 , Eric D van Hullebusch 2 , Mehmet A Oturan 1
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Combination of the electro-Fenton process with a post-biological treatment could represent a cost-effective solution for application of electrochemical advanced oxidation processes. The objective of this study was to assess this treatment strategy in the case of a complex pharmaceutical mixture. First, main operating parameters ([Fe2+] and current) of the electro-Fenton process were optimized. An optimal concentration of 0.2 mM of Fe2+ was obtained for mineralization of the pharmaceutical mixture. An optimal current of 400 mA was also obtained for degradation of caffeine and 5-fluorouracil in the mixture. However, mineralization of the effluent was continuously improved when increasing the current owing to the promotion of mineralization of organic compounds at the BDD anode. Besides, energy efficiency was decreased at prolonged treatment time because of mass transport limitation. Interestingly, it was observed a strong biodegradability enhancement of the solution after short treatment times (<3 h) at 500 and 1000 mA, which can be related to the degradation of parent compounds into more biodegradable by-products. The need for an acclimation time of the biomass to the pre-treated effluent was also emphasized, most probably because of the formation of some toxic by-products as observed during acute toxicity tests. Therefore, a biological post-treatment could represent a cost-effective solution for the removal of biodegradable residual organic compounds as well as for the removal of nitrogen released from mineralization of organic compounds under the form of NO3- and NH4+ during electro-Fenton pre-treatment.
中文翻译：
复杂药物混合物的电子芬顿处理：矿化效率和可生物降解性增强。
电芬顿法与生物后处理的结合可能代表了电化学高级氧化法应用的经济有效的解决方案。本研究的目的是评估复杂药物混合物的治疗策略。首先，对电子芬顿工艺的主要操作参数（[Fe2 +]和电流）进行了优化。对于药物混合物的矿化，获得了0.2 mM Fe2 +的最佳浓度。对于混合物中咖啡因和5-氟尿嘧啶的降解，还获得了400 mA的最佳电流。然而，由于促进了BDD阳极上有机化合物的矿化，当增加电流时，流出物的矿化持续改善。除了，由于运输限制，能量效率在延长的治疗时间内降低。有趣的是，在500和1000 mA的短处理时间（<3 h）后，观察到溶液的生物降解能力增强，这可能与母体化合物降解为可生物降解的副产物有关。还强调了需要使生物质适应预处理后的废水的时间，这很可能是由于在急性毒性试验中观察到某些有毒副产物的形成。因此，生物后处理可以代表一种经济有效的解决方案，用于去除可生物降解的残留有机化合物，以及去除在电芬顿预处理过程中以NO3-和NH4 +形式从有机化合物矿化中释放的氮。治疗。
更新日期：2020-04-06
中文翻译：
复杂药物混合物的电子芬顿处理：矿化效率和可生物降解性增强。
电芬顿法与生物后处理的结合可能代表了电化学高级氧化法应用的经济有效的解决方案。本研究的目的是评估复杂药物混合物的治疗策略。首先，对电子芬顿工艺的主要操作参数（[Fe2 +]和电流）进行了优化。对于药物混合物的矿化，获得了0.2 mM Fe2 +的最佳浓度。对于混合物中咖啡因和5-氟尿嘧啶的降解，还获得了400 mA的最佳电流。然而，由于促进了BDD阳极上有机化合物的矿化，当增加电流时，流出物的矿化持续改善。除了，由于运输限制，能量效率在延长的治疗时间内降低。有趣的是，在500和1000 mA的短处理时间（<3 h）后，观察到溶液的生物降解能力增强，这可能与母体化合物降解为可生物降解的副产物有关。还强调了需要使生物质适应预处理后的废水的时间，这很可能是由于在急性毒性试验中观察到某些有毒副产物的形成。因此，生物后处理可以代表一种经济有效的解决方案，用于去除可生物降解的残留有机化合物，以及去除在电芬顿预处理过程中以NO3-和NH4 +形式从有机化合物矿化中释放的氮。治疗。
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