New Alginate/Geopolymer Hybrid Beads as Innovative Adsorbent Applied to the Removal of 5-Fluorouracil from Contaminated Environmental Water

Amor, Assia Ben; Arenas, Marina; Martín, J. Aznar; Ouakouak, Abdelkader; Santos, Juan Luís; Aparicio, Irene; Alonso, Esteban; Hamdia, Noureddine

doi:10.2139/ssrn.4387151

Cited by 1 publication

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“…Amor et al [80] show that the kinetic outcomes fit the pseudo-second-order model for the adsorption of the cytostatic drug 5-fluorouracil (5-FU) from water samples onto alginate/geopolymer hybrid beads (AGHB) in the static regime.…”

Section: Kinetic Evaluation Of the Biosorption Processmentioning

confidence: 99%

“…Table 3 shows the kinetic characteristics of the biosorption process as determined by model plots for all concentrations examined. The authors explain this kinetic behavior by stating that, in addition to the porefilling sorption process, the carboxyl and hydroxyl groups of alginate immobilized on the geopolymer matrix promoted the retention of 5-FU ions via hydrogen bonding [80].…”

Section: Kinetic Evaluation Of the Biosorption Processmentioning

confidence: 99%

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Biocomposite Material Based on Lactococcus lactis sp. Immobilized in Natural Polymer Matrix for Pharmaceutical Removal from Aqueous Media

Niță,

Suceveanu,

Nedeff

et al. 2024

Polymers

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Ecosystems are negatively impacted by pharmaceutical-contaminated water in different ways. In this work, a new biosorbent obtained by immobilizing Lactococcus lactis in a calcium alginate matrix was developed for the removal of pharmaceuticals from aqueous solutions. Ethacridine lactate (EL) was selected as the target drug. Lactococcus Lactis biomass was chosen for the biosorbent synthesis for two reasons: (i) the microbial biomass used in the food industry allows the development of a low-cost biosorbent from available and renewable materials, and (ii) there is no literature mentioning the use of Lactococcus Lactis biomass immobilized in natural polymers as a biosorbent for the removal of pharmaceuticals. The characterization of the synthesized biosorbent named 5% LLA was performed by scanning electron microscopy (SEM) and Fourier transform infrared spectroscopy (FTIR) analysis. Additionally, particle size and the point of zero charge were established. Batch biosorption investigations showed that using 5% LLA at an initial pH of 3.0 and a biosorbent dose of 2 g/L resulted in up to 80% EL removal efficiency for all EL initial concentrations (20–60 mg/L). Four equilibrium isotherms, given in the order of Redlich–Peterson > Freundlich > Hill > Temkin, are particularly relevant for describing the experimental data for EL biosorption on the 5% LLA biosorbent using correlation coefficient values. Kinetic parameters were determined using kinetic models such as pseudo-first-order, pseudo-second-order, Elovich, Avrami and Weber–Morris. The pseudo-second-order kinetics model provides the greatest fit among the evaluated equations, with correlation coefficients greater than 0.99. According to the study’s findings, the developed biocomposite is a potentially useful material for the removal of pharmaceuticals from aqueous matrices.

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Section: Kinetic Evaluation Of the Biosorption Processmentioning

confidence: 99%

Section: Kinetic Evaluation Of the Biosorption Processmentioning

confidence: 99%