Search results for " Adsorption kinetics"

showing 3 items of 3 documents

Experimental and robust modeling approach for lead(II) uptake by alginate gel beads: influence of the ionic strength and medium composition.

2014

Abstract Systematic kinetic and equilibrium studies on the lead ions removal ability by Ca-alginate gel beads have been performed by varying several internal parameters, namely, number of gel beads, nature and composition of the ionic medium and pH, which allowed us to model a wastewater in order to closely reproduce the composition of a real sample. Moreover, the effects brought about the different ionic species present in the reacting medium have been evaluated. Differential Pulse Anodic Stripping Voltammetry (DP-ASV), has been systematically used to perform kinetic and equilibrium measurements over continuous time in a wide range of concentration. Kinetic and equilibrium data have been q…

Accuracy and precisionChemistryAnalytical chemistryIonic bondingKinetic energySurfaces Coatings and FilmsElectronic Optical and Magnetic MaterialsIonBiomaterialsAnodic stripping voltammetryColloid and Surface ChemistryIonic strengthAlginate gel beads Robust statistics Metal adsorption Wastewater treatment Ionic strength Differential Pulse Anodic Stripping Voltammetry Adsorption isotherms Adsorption kinetics Lead Heavy metalmedicineComposition (visual arts)Settore CHIM/01 - Chimica AnaliticaSwellingmedicine.symptomJournal of colloid and interface science
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Efficient Removal of Methyl Red Dye by Using Bark of Hopbush

2022

Methyl red (MR) dye, one of the azo dyes, is mutagenic and its persistence has negative effects on the environment and people’s health. The current work is the first to demonstrate that methyl red dye can be removed effectively and sustainably, utilizing biomass derived from the bark of the Dodonaea viscosa (Hopbush) plant. The Hopbush bark shows effective adsorption of MR, upto 73%, under optimized conditions in an aqueous medium. The experimental conditions were optimized by examining the effect of time, initial dye concentration, pH and ionic strength on the adsorption process in an aqueous medium. Maximum (i.e., 73%) adsorption of MR removal (500 ppm) was observed in highly acidic…

Geography Planning and DevelopmentAquatic ScienceBiochemistry<i>Dodonaea viscosa</i> plant bark; animal charcoal; silica gel; adsorption kinetics; adsorption isothermWater Science and TechnologyWater
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Biochar from Wood Chips and Corn Cobs for Adsorption of Thioflavin T and Erythrosine B.

2022

Biochars from wood chips (WC) and corn cobs (CC) were prepared by slow pyrolysis and used for sorption separation of erythrosine B (EB) and thioflavin T (TT) in batch experiments. Biochar-based adsorbents were extensively characterized using FTIR, XRD, SEM-EDX, and XPS techniques. The kinetics studies revealed that adsorption on external surfaces was the rate-limiting step for the removal of TT on both WC and CC biochar, while intraparticle diffusion was the rate-limiting step for the adsorption of EB. Maximal experimental adsorption capacities Qmaxexp of TT reached 182 &plusmn; 5 (WC) and 45 &plusmn; 2 mg g&minus;1 (CC), and EB 12.7 &plusmn; 0.9 (WC) and 1.5 &plusmn; 0.4 mg g&minus;1 (CC),…

adsorption kineticthioflavin Tisothermwood chipseryhrosine Bcorn cobbiocharGeneral Materials Sciencewood chips; corn cobs; biochar; thioflavin T; eryhrosine B; adsorption kinetics; isothermMaterials (Basel, Switzerland)
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