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A Comparison between Different Agro-Wastes and Carbon Nanotubes for Removal of Sarafloxacin from Wastewater: Kinetics and Equilibrium Studies.
- Source :
-
Molecules (Basel, Switzerland) [Molecules] 2020 Nov 19; Vol. 25 (22). Date of Electronic Publication: 2020 Nov 19. - Publication Year :
- 2020
-
Abstract
- In the current study, eco-structured and efficient removal of the veterinary fluoroquinolone antibiotic sarafloxacin (SARA) from wastewater has been explored. The adsorptive power of four agro-wastes (AWs) derived from pistachio nutshells (PNS) and Aloe vera leaves (AV) as well as the multi-walled carbon nanotubes (MWCNTs) has been assessed. Adsorbent derived from raw pistachio nutshells (RPNS) was the most efficient among the four tested AWs (%removal '%R' = 82.39%), while MWCNTs showed the best adsorptive power amongst the five adsorbents (%R = 96.20%). Plackett-Burman design (PBD) was used to optimize the adsorption process. Two responses ('%R' and adsorption capacity ' q <subscript>e</subscript> ') were optimized as a function of four variables (pH, adsorbent dose 'AD' (dose of RPNS and MWCNTs), adsorbate concentration [SARA] and contact time 'CT'). The effect of pH was similar for both RPNS and MWCNTs. Morphological and textural characterization of the tested adsorbents was carried out using FT-IR spectroscopy, SEM and BET analyses. Conversion of waste-derived materials into carbonaceous material was investigated by Raman spectroscopy. Equilibrium studies showed that Freundlich isotherm is the most suitable isotherm to describe the adsorption of SARA onto RPNS. Kinetics' investigation shows that the adsorption of SARA onto RPNS follows a pseudo-second order (PSO) model.
- Subjects :
- Adsorption
Analysis of Variance
Ciprofloxacin chemistry
Ciprofloxacin isolation & purification
Hydrogen-Ion Concentration
Kinetics
Nanotubes, Carbon ultrastructure
Pistacia chemistry
Spectroscopy, Fourier Transform Infrared
Spectrum Analysis, Raman
Thermogravimetry
Agriculture
Ciprofloxacin analogs & derivatives
Nanotubes, Carbon chemistry
Wastewater chemistry
Water Pollutants, Chemical isolation & purification
Subjects
Details
- Language :
- English
- ISSN :
- 1420-3049
- Volume :
- 25
- Issue :
- 22
- Database :
- MEDLINE
- Journal :
- Molecules (Basel, Switzerland)
- Publication Type :
- Academic Journal
- Accession number :
- 33228258
- Full Text :
- https://doi.org/10.3390/molecules25225429