Investigation of kinetic, isotherm and adsorption efficacy of thorium by orange peel immobilized on calcium alginate

Abstract

In this research work the thorium uptake on immobilized protonated orange peel was studied in a batch system. The effects of effective parameters such as biosorbent dosage, initial metal ion concentration, and contact time on the biosorption of thorium were analyzed. The biosorption capacity of the immobilized orange peel for thorium at optimal conditions of initial pH 3.8, biosorbent dosage 8 g/L, and initial thorium concentration 170 mg/L was found to be 18.65 mg/g. According to the results of contact time, the biosorption process reached equilibrium after around 10 h of contact. Investigation of the kinetics showed that the biosorption of thorium onto immobilized orange peel follows the pseudo-second-order model. The Langmuir and Freundlich isotherms were used to model the experimental equilibrium data. The results showed better agreement by the Langmuir isotherm. The maximum absorption capacity of immobilized protonated orange peel for thorium adsorption was predicted by the Langmuir isotherm at 29.58 mg/g.

On the performance of Sargassum-derived calcium alginate ion exchange resins for Pb2+ adsorption: batch and packed bed applications

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Boosted ability of ZIF-8 for early-stage adsorption and degradation of chemical warfare agent simulants

“…The kinetics of the adsorption process provides essential information about reaction path and the rate of adsorbate. 43–46 The pseudo-first order model is one of the representative models. The pseudo-first order model equation is as follows: q t = q e (1 − e − kt )where, q e is equilibrium adsorption capacity (mg g −1 ), q t is the adsorption capacity (mg g −1 ) at time t and k is the pseudo-first order rate constant (h −1 ).…”

“…The kinetics of the adsorption process provides essential information about reaction path and the rate of adsorbate. [43][44][45][46] The pseudo-rst order model is one of the representative models. The pseudo-rst order model equation is as follows:…”

Ce(III) and La(III) ions adsorption using Amberlite XAD-7 resin impregnated with DEHPA extractant: response surface methodology, isotherm and kinetic study

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