Batch Studies on Biosorption of Ciprofloxacin on Freshwater Macro alga Lemna minor

Davoud Balarak, Kethineni Chandrika
2019 International Journal of Pharmaceutical Investigation  
Objectives: Ciprofloxacin (CIP) antibiotic adsorption from aqueous solution unto Lemna minor (LM) was studied. The aim of the experiment was to utilize the LM as a cheap alternative adsorbent compared to more expensive and relatively less effective techniques for the removal of CIP from solution. Methods: The experiment was performed using batch adsorption technique. Thermodynamic parameters such as the changes in enthalpy, entropy and Gibbs free energy was determined, showing adsorption to be
more » ... g adsorption to be an endothermic yet spontaneous process. Pseudo-first-order, pseudo-secondorder and intraparticle diffusion models were considered to evaluate the rate parameters. Results: The experimental data fitted the pseudo-secondorder kinetic model, with qe between 4.31 to 19.62 mg/g at concentrations between 10 to 50 mg/L. also due to the inter-particle diffusion, It can be stated that mechanism of the adsorption process is probably a combination of boundary layer and pore diffusion which contribute to the rate determining step. Conclusion: The results indicate that LM biomass could be employed as a low-cost in wastewater treatment for the removal of antibiotics. This is an open access article distributed under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike 4.0 License, which allows others to remix, tweak, and build upon the work non-commercially, as long as the author is credited and the new creations are licensed under the identical terms.
doi:10.5530/ijpi.2019.3.22 fatcat:webpvz2r55hgtbckwp63gfibwe