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Evaluation of the activated carbon coated with multiwalled carbon nanotubes in removal of ciprofloxacin from aqueous solutions
Applied Water Science ( IF 5.7 ) Pub Date : 2020-05-19 , DOI: 10.1007/s13201-020-01229-9
Narges Sharifpour , Fazel Mohammadi Moghaddam , Goshtasb Mardani , Mohammad Malakootian

Ciprofloxacin (CIP) is a commonly used antibiotic which is excreted in significant quantities and may likely be found in environments, especially wastewater. Thus, in the present study, we aimed to remove CIP from aqueous solutions using activated carbon supported with multivalent carbon nanotubes MWCNTs/AC. Herein, we prepared the MWCNTs/AC and the structural characterization of the adsorbent was performed using the BET, FTIR, and SEM methods. In order to obtain the optimal conditions of MWCNTs/AC activity, different experimental conditions including the pH, adsorbent dosage, contact time, initial CIP concentration, and temperature were examined. Afterward, to approach reality, the experiments were carried out under the optimal conditions using a sewage sample previously determined in terms of the BOD, COD, pH, EC, turbidity, and concentration of ciprofloxacin. Finally, the CIP levels were measured by HPLC. According to the results, the pH of 7, contact time of 30 min, adsorbent dosage of 20 mg/L, temperature of 40 °C, and initial CIP concentration of 20 mg/L were found to be the optimal conditions for MWCNTs/AC activity. In these conditions, the maximum removal efficiency of CIP from the synthetic and actual samples was 100% and 73%, respectively. Moreover, the adsorption behavior was in compliance with the pseudo-second-order, Freundlich isotherm kinetics. According to our findings, using MWCNTs/AC led to a considerable removal of CIP from the sewage samples. Thus, the use of this adsorbent is highly recommended in order to remove other antibiotics from water and wastewater.

中文翻译:

评估用多壁碳纳米管包覆的活性炭从水溶液中去除环丙沙星的效果

环丙沙星(CIP)是一种常用的抗生素,它会大量排泄,很可能在环境中,尤其是废水中被发现。因此,在本研究中,我们旨在使用载有多价碳纳米管MWCNTs / AC的活性炭从水溶液中去除CIP。本文中,我们制备了MWCNTs / AC,并使用BET,FTIR和SEM方法对吸附剂进行了结构表征。为了获得最佳的MWCNTs / AC活性条件,检查了不同的实验条件,包括pH,吸附剂用量,接触时间,初始CIP浓度和温度。之后,为了接近现实,实验是在最佳条件下使用先前根据BOD,COD,pH,EC,浊度,和环丙沙星的浓度。最后,通过HPLC测量CIP水平。根据结果​​,发现pH 7,接触时间30分钟,吸附剂剂量20 mg / L,温度40°C和初始CIP浓度20 mg / L是MWCNTs / AC的最佳条件。活动。在这些条件下,从合成样品和实际样品中去除CIP的最大效率分别为100%和73%。而且,吸附行为符合拟二级Freundlich等温线动力学。根据我们的发现,使用MWCNTs / AC可以从污水样品中大量去除CIP。因此,强烈建议使用这种吸附剂,以便从水和废水中去除其他抗生素。pH为7,接触时间为30分钟,吸附剂剂量为20 mg / L,温度为40°C,初始CIP浓度为20 mg / L被发现是MWCNTs / AC活性的最佳条件。在这些条件下,从合成样品和实际样品中去除CIP的最大效率分别为100%和73%。而且,吸附行为符合拟二级Freundlich等温线动力学。根据我们的发现,使用MWCNTs / AC可以从污水样品中大量去除CIP。因此,强烈建议使用这种吸附剂,以便从水和废水中去除其他抗生素。pH值为7,接触时间为30分钟,吸附剂剂量为20 mg / L,温度为40°C,初始CIP浓度为20 mg / L是MWCNTs / AC活性的最佳条件。在这些条件下,从合成样品和实际样品中去除CIP的最大效率分别为100%和73%。而且,吸附行为符合拟二级Freundlich等温动力学。根据我们的发现,使用MWCNTs / AC可以从污水样品中大量去除CIP。因此,强烈建议使用这种吸附剂,以便从水和废水中去除其他抗生素。在这些条件下,从合成样品和实际样品中去除CIP的最大效率分别为100%和73%。而且,吸附行为符合拟二级Freundlich等温线动力学。根据我们的发现,使用MWCNTs / AC可以从污水样品中大量去除CIP。因此,强烈建议使用这种吸附剂,以便从水和废水中去除其他抗生素。在这些条件下,从合成样品和实际样品中去除CIP的最大效率分别为100%和73%。而且,吸附行为符合拟二级Freundlich等温线动力学。根据我们的发现,使用MWCNTs / AC可以从污水样品中大量去除CIP。因此,强烈建议使用这种吸附剂,以便从水和废水中去除其他抗生素。
更新日期:2020-05-19
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