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

Abstract

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 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.

Highly Efficient Adsorption and Removal of Amoxicillin from Aqueous Solution by Magnetic Graphene Oxide Nanocomposite

“…38 In addition, the MGO levels represent an anionic group (COO − ) and subsequently improve their particle exchange properties for specific treatments of oppositely charged species (AMO) of aqueous mixtures through the electrostatic power of their interaction. 39 Ji et al 38 examined the sorption of TC on MWCNT and graphite, and the elimination of this tetracycline was achieved at pH 2. Moreover, Balarak et al 39 determined that at acidic pH situations, a positively charged external sites on Lemna minor prefer the sorption of CIP anions owing to the electrostatic enchantment, and the pH of the ciprofloxacin solution.…”

“…39 Ji et al 38 examined the sorption of TC on MWCNT and graphite, and the elimination of this tetracycline was achieved at pH 2. Moreover, Balarak et al 39 determined that at acidic pH situations, a positively charged external sites on Lemna minor prefer the sorption of CIP anions owing to the electrostatic enchantment, and the pH of the ciprofloxacin solution. The data showed that the increase at the initial AMO concentration improves the quantity of AMO adsorbed onto the MGO.…”

Investigation of Isotherm, Kinetics and Thermodynamics of Ciprofloxacin Adsorption by Molecularly Imprinted Polymer from Aqueous Solutions

“…Adsorption thermodynamics: In studying the adsorption process, three thermodynamic parameters should be examined and their values determined. These parameters are: 32 1. Standard Free Energy (ΔG°) 2.…”

Adsorptive removal of antibiotic pollutants from wastewater using biomass/biochar-based adsorbents

“…Ciprofloxacin removal from an aqueous medium by utilizing Lemna minor biomass has been suggested to display adsorption kinetics best defined with the pseudo-second-order model demonstrating adsorption capacities ranging from 4.31 to 19.62 mg g −1 for an initial ciprofloxacin concentration range of 10 to 5 0 mg L −1 . 81 Furthermore, thermodynamic studies revealed that the percentage removal of ciprofloxacin consistently increased from 72.41 to 91.6% with increasing solution temperature from 273 to 323 K, thereby yielding an endothermic and spontaneous chemical reaction. In addition, a kinetics study deduced that equilibrium with the optimum adsorption of ciprofloxacin was attained in 90 min of contact time.…”