TY - JOUR
T1 - Kinetics of oxytetracycline sorption on magnetite nanoparticles
AU - Rakshit, S.
AU - Sarkar, D.
AU - Punamiya, P.
AU - Datta, R.
PY - 2014/7
Y1 - 2014/7
N2 - Iron oxide nanoparticles (nano-Fe) have been widely used in environmental remediation, including that of emerging contaminants, such as antibiotics. Magnetite nanoparticles (nano-Fe3O4) have been reported to form on the outer surface of nano-Fe and have the potential to be a good sorbent for certain antibiotics. This study reports, for the first time, the kinetics and thermodynamics of adsorption of a common tetracycline group antibiotic, oxytetracycline (OTC), on nano-Fe3O4. Batch sorption kinetics were evaluated by varying initial OTC concentration (0.25-2 mM), nano-Fe3O4 concentration (2.5-20 g L-1), pH (3.8-7.6), temperature (5, 15, 35 °C), and ionic strength (0.01-0.5 M KCl) to derive thermodynamic and kinetic constants. Results show that OTC sorption kinetics is rapid and increases with increasing temperature. The derived thermodynamic constants suggest a surface chemical-controlled reaction that proceeds via an associative mechanism. Results indicate the potential of developing a nano-magnetite-based remediation system for tetracycline group of antibiotics.
AB - Iron oxide nanoparticles (nano-Fe) have been widely used in environmental remediation, including that of emerging contaminants, such as antibiotics. Magnetite nanoparticles (nano-Fe3O4) have been reported to form on the outer surface of nano-Fe and have the potential to be a good sorbent for certain antibiotics. This study reports, for the first time, the kinetics and thermodynamics of adsorption of a common tetracycline group antibiotic, oxytetracycline (OTC), on nano-Fe3O4. Batch sorption kinetics were evaluated by varying initial OTC concentration (0.25-2 mM), nano-Fe3O4 concentration (2.5-20 g L-1), pH (3.8-7.6), temperature (5, 15, 35 °C), and ionic strength (0.01-0.5 M KCl) to derive thermodynamic and kinetic constants. Results show that OTC sorption kinetics is rapid and increases with increasing temperature. The derived thermodynamic constants suggest a surface chemical-controlled reaction that proceeds via an associative mechanism. Results indicate the potential of developing a nano-magnetite-based remediation system for tetracycline group of antibiotics.
KW - Adsorption
KW - Kinetics
KW - Nano-magnetite
KW - Oxytetracycline
KW - Remediation
KW - Thermodynamics
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U2 - 10.1007/s13762-013-0317-x
DO - 10.1007/s13762-013-0317-x
M3 - Article
AN - SCOPUS:84902384943
SN - 1735-1472
VL - 11
SP - 1207
EP - 1214
JO - International Journal of Environmental Science and Technology
JF - International Journal of Environmental Science and Technology
IS - 5
ER -