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Naproxen removal by CWPO with Fe3O4/multi-walled carbon nanotubes in a fixed-bed reactor
Journal of Environmental Chemical Engineering ( IF 7.4 ) Pub Date : 2021-01-21 , DOI: 10.1016/j.jece.2021.105110
Y. Huaccallo-Aguilar , S. Álvarez-Torrellas , M. Larriba , V.I. Águeda , J.A. Delgado , G. Ovejero , J.A. Peres , J. García

The prepared Fe3O4/multiwalled carbon nanotubes (MWCNTs) in catalytic wet peroxide oxidation (CWPO) is an effective method of removing some pharmaceuticals from water matrices for environmental protection. Therefore, operating parameters (catalyst dose, H2O2 dose, flow rate, pH) of CWPO with the easy-prepared Fe3O4/MWCNT composite were evaluated for the effective NAP removal in an up-flow bed reactor (UFBR). The prepared catalyst was successfully synthesized by a facile coprecipitation method. The highest removals of TOC and NAP by continuous CWPO of NAP aqueous solution (10 mg L−1) were obtained in the experiments with ratios 0.4 g of catalyst load/double H2O2 stoichiometric ratio (78.4% for TOC and 83% for NAP), and 0.2 g of catalyst load/stoichiometric dose (39.1% for TOC and 73.1% for NAP). Both operated at 10 mg L−1 of NAP, 1.7 mL min−1, 50 °C and circumneutral pH. In addition, their high consumption H2O2 efficiency (> 59.6%) and a low concentration of leached iron dissolved (< 0.28 mg L−1) found at 450 min indicated the great catalyst stability. Furthermore, the application of CWPO for different aqueous matrices, the NAP removal from in a surface water sample was almost complete (90.5%) 1260 min TOS while whereas in the hospital wastewater and wastewater treatment plant effluent samples were 64.9% and 58.9%, respectively. Our results demonstrate that continuous CWPO with the easy-prepared Fe3O4/MWCNTs has the potential to be applied as an effective treatment for the rapid removal of NAP from different water matrices.



中文翻译:

在固定床反应器中用Fe 3 O 4 /多壁碳纳米管通过CWPO去除萘普生

催化湿式过氧化物氧化(CWPO)制得的Fe 3 O 4 /多壁碳纳米管(MWCNTs)是从水基质中去除某些药物的一种有效方法,以保护环境。因此,对易于制备的Fe 3 O 4 / MWCNT复合材料的CWPO的运行参数(催化剂剂量,H 2 O 2剂量,流速,pH)进行了评估,以评估其在上流床反应器(UFBR)中的有效NAP去除率。 。所制备的催化剂通过简便的共沉淀法成功合成。NAP水溶液的连续CWPO对TOC和NAP的去除最高(10 mg L -1在实验中以0.4 g的催化剂负载/双H 2 O 2化学计量比(TOC为78.4%,NAP为83%)和0.2 g的催化剂负载/化学计量比(TOC为39.1%和73.1%)获得NAP)。在10毫克的L二者操作-1 NAP的,1.7毫升分钟-1,50℃,pH值circumneutral。此外,它们的高消耗H 2 O 2效率(> 59.6%)和低浓度的溶出铁溶解(<0.28 mg L -1)在450分钟时发现的)表明催化剂具有很大的稳定性。此外,在不同的水基体上使用CWPO时,TOS 1260 min TOS中的NAP去除几乎完成(90.5%),而医院废水和废水处理厂废水样品中的NAP去除分别为64.9%和58.9% 。我们的结果表明,采用易于制备的Fe 3 O 4 / MWCNTs进行连续CWPO具有潜力,可作为从不同水基质中快速去除NAP的有效方法。

更新日期:2021-01-24
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