Kinetics of Chromium Sorption on Biomass Fungi from Aqueous Solution

Abstract

Abstract:The kinetics of chromium ions sorption from aqueous solution on fungi biomass have been investigated in a batch system. The experimental data were analysed based on an intraparticle diffusion equation and a pseudo-second-order mechanism, in order to predict the constant rate of sorption and the equilibrium capacity with the effect of initial chromium ions concentration, temperature and initial solution pH. The results indicate that the sorption mechanism is described by a pseudo-second order equation. Intraparticule diffusion was signifiant in the lower concentration systems. The sorption of chromium onto the biomass fungi sorbent is favoured at higher concentrations of chromium solution, low temperatures. An activation energy of sorption was evaluted as 11.7 Kj.mol-1 for the sorption of chromium ions on fungi biomass. The results show that the sorption of the chromium ions on fungi biomass is exothermic nature process.

Investigation of kinetics of Cr(VI)–fired brick clay interaction

“…Among many kinetics models reported, the intraparticle diffusion model is helpful in understanding the kinetics of interaction of heavy metals and adsorbents at microscopic level [15,16]. In this research, time dependence of the extent of sorption of Cr(VI) was used as a measure of the rate of interaction of Cr(VI) with brick clay particles, fired at different temperatures.…”

“…Many natural and synthetic sorbents, such as fungi, rice husk, maize cob, fruit waste and different types of clay are used to remove heavy metals from effluents [9][10][11][12][13][14][15]. Equilibrium and kinetics studies of sorption of many heavy metals on these adsorbents have already been reported.…”

Fast kinetic and efficient removal of As(V) from aqueous solution using anion exchange resins

“…This may be attributed to the steric effect exerted by the methyl group substituents on positive nitrogen active site. To examine the rate determining step of the adsorption reaction, the uptake time data obtained were treated according to the equation [31] q t = x + k i t 0.5 (5) where k i (mmol/g min 0.5 ) is the intraparticle diffusion rate constant and x is indication for the thickness of the boundary layer. The straight line obtained and the positive values of x ( Fig.…”

Synthesis of magnetic chelating resins functionalized with tetraethylenepentamine for adsorption of molybdate anions from aqueous solutions

“…The relationship between the uptake and the square root of time indicates the effect of the intraparticle diffusion on the rate of reaction. The rate of intraparticle diffusion can be described as [38]:…”