In this study, the kinetic data of the adsorption of two antibiotics onto three nanoadsorbents was modeled using the Brouers-Sotolongo fractal model. The model parameters were calculated at different initial antibiotic concentrations using various approximations of the kinetic equation for two quantities of practical relevance: the sorption power and the half-time characteristic of the sorption. The merits of the nanomaterial were then compared in terms of their application in the elimination of dangerous antibiotic wastes. We also developed a formula to calculate the effective rate of the best adsorbent. This study presents the modeling method in detail and has a pedagogical value for similar researches.
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http://dx.doi.org/10.1007/s11356-016-8182-z | DOI Listing |
J Hazard Mater
February 2024
Chemical Engineering Department, Faculty of Engineering, Widya Mandala Surabaya Catholic University, Surabaya 60114, East Java, Indonesia. Electronic address:
Surface modification of durian rind cellulose (DCell) was done by utilizing the strong coordination effect of polyphenol-based metal phenolic networks (MPNs). MPNs from Fe(III)-tannic acid (FTN) and Fe(III)-gallic acid (FGN) were coated on DCell via a self-assembly reaction at pH 8, resulting in adsorbent composites of FTN@DCell and FGN@DCell for removal of Cr(VI). Batch adsorption experiments revealed that FTN coating resulted in an adsorbent composite with higher adsorption capacity than FGN coating, owing to the greater number of additional adsorption sites from phenolic hydroxyl groups of tannic acid.
View Article and Find Full Text PDFACS Omega
June 2023
Institute of Chemistry, University of Potsdam, D-14476 Potsdam, Germany.
New TiO hybrid composites were prepared from kaolin clay, predried and carbonized biomass, and titanium tetraisopropoxide and explored for tetracycline (TET) and bisphenol A (BPA) removal from water. Overall, the removal rate is 84% for TET and 51% for BPA. The maximum adsorption capacities () are 30 and 23 mg/g for TET and BPA, respectively.
View Article and Find Full Text PDFEnviron Sci Pollut Res Int
September 2022
Analytical Research Laboratory, Department of Chemistry, Aligarh Muslim University, Aligarh, India, 202002.
A new Cd(II)-imprinting polymer was synthesised based on glycidyl methacrylate (FeO@GMA@IIP) and employed to develop a dispersive magnetic solid-phase extraction method for the preconcentration prior to the determination of Cd(II) from the environmental samples. A central composite design (CCD) based on response surface methodology was used for optimization of the process variables and the material shows the promising saturation adsorption capacity of 28.21 mg g under the optimum pH of 4.
View Article and Find Full Text PDFJ Hazard Mater
January 2022
Department of Civil Engineering, Tsinghua University, 100084 Beijing, PR China. Electronic address:
This study seeks to assess the imbibition kinetics of low radioactive wastewater (from the DayaBay nuclear power plant) into a partially saturated ternary-binder mortar, as well as the sorption kinetics of Co and Cs from the water. Mortar samples with the initial saturation degrees of 0, 0.4, 0.
View Article and Find Full Text PDFLangmuir
July 2021
Department of Chemistry, Vaal University of Technology, Vanderbijlpark 1911, Gauteng, South Africa.
In this study, a magnetic generation-5 polyamidoamine (G-5 PAMAM) dendrimer-functionalized SBA-15 (mPSBA) composite was synthesized by coupling amine-functionalized silica (SBA-15-NH) and amine-functionalized magnetic nanoparticles (MNP-NH) with the G-5 PAMAM, before characterization and aqueous sorption of As(III), Cd(II), tetracycline, and ciprofloxacin using the composite. The mPSBA characterization data exhibited the typical Si-O-Si infrared peaks from the SBA-15 backbone in addition to the acquired characteristic infrared Fe-O and amide-I/II peaks from the MNP and G-5 PAMAM dendrimers, respectively. Postsorption infrared spectra showing shifts for the amide-linked groups indicated the likely points of contaminant attachment on the composite.
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