Comparative Study Between Metronidazole Residues Disposal by Using Adsorption and Photodegradation Processes onto MgO Na
- PDF / 2,475,812 Bytes
- 21 Pages / 595.276 x 790.866 pts Page_size
- 73 Downloads / 178 Views
Comparative Study Between Metronidazole Residues Disposal by Using Adsorption and Photodegradation Processes onto MgO Nanoparticles Mohamed M. El Bouraie1 · Sabah S. Ibrahim1 Received: 2 June 2020 / Accepted: 10 August 2020 © Springer Science+Business Media, LLC, part of Springer Nature 2020
Abstract The photodegradation and adsorption processes of metronidazole (MNZ) was conducted utilizing the batch reactor onto magnesium oxide nanoparticles (MgO NP) as the catalyst surface affected by UV radiation, initial concentration of MNZ, pH, catalyst loading, inorganic salts addition, time, and temperature. Chemical composition and morphological properties of the prepared MgO NP can also be portrayed by several techniques such as XRD, EDX, SEM, and TEM, while GC–MS analysis was used to monitor the photodegradation pathway for MNZ molecules. The results indicated that the actual removal of 93.2% of 80 mg/L MNZ present in 25 mL of a solution containing 0.1 mg/L of MgO NP could be distributed as 35.7% for maximum adsorption and 57.5% for degradation efficiency during 180 min. The degradation process is mainly of two steps; dark adsorption experiment, and photocatalytic degradation performance. Hence, Kinetic analyses indicate that adsorption constant estimated in dark conditions is smaller than the adsorption equilibrium constant derived from the Langmuir–Hinshelwood kinetic model through photodegradation of MNZ that follows pseudo-first-order kinetic. The adsorption isotherm result specified that the adsorption nature is chemisorption and fit Langmuir model, as well as thermodynamic results indicated that it is a nonspontaneous and endothermic reaction. Keywords Adsorption · Langmuir · Magnesium oxide nanoparticles · Metronidazole · Photodegradation
1 Introduction To date, antibiotics are one of the pharmaceutical compounds that have accumulated in the aquatic environment due to excessive use in different human and veterinary applications [1, 2]. Antibiotics are important substances employed as therapeutics, feed additives, and growth accelerators in livestock production and fish farms, as well as used as effective inhibitors for bacteria to protect crops from spoilage [3, 4]. Otherwise, since 2006, antibiotics have been banned as growth accelerators in the feed of livestock and Electronic supplementary material The online version of this article (https://doi.org/10.1007/s10904-020-01711-6) contains supplementary material, which is available to authorized users. * Mohamed M. El Bouraie [email protected]; [email protected] 1
Central Laboratory for Environmental Quality Monitoring (CLEQM), National Water Research Center (NWRC), El‑Qanater El‑Khairiya 13621, Egypt
fish in many countries of the European Union [5]. Hence, antibiotics are receiving significant attention as being one of the hazardous chemicals which are considered as recalcitrant bio-accumulative organic compounds due to the continuous release into the environment [6, 7]. Recently, antibiotic contamination was monitored in river water
Data Loading...
