Adsorptive Removal of Antimony (III) Using Modified Montmorillonite: A Study on Sorption Kinetics

Abstract

The adsorptive removal of antimony (III) has been successfully obtained on montmorillonite (MMT) and modified MMT from synthetic solution. The adsorption behavior of the modified and unmodified MMT has been investigated as a function of initial concentration of metal ion in the solution, pH of the solution and contact time using a batch extraction process. The optimized process can be applied for the adsorption, detection and estimation of antimony from 0.006 µg/ml (6.0 ppb) to 100.00 µg/ml (100.0 ppm) in aqueous solution. It has been observed that almost 99% of antimony (III) can be successfully extracted from a solution containing 100 µg/ml of the metal ion at pH 6.0 at 25?C ± 2?C. The investigation of the kinetics of sorption of antimony (III) on MMT/modified MMTshows intraparticle diffusion to be the rate limiting step during the initial stages of adsorption followed by chemisorption

Antimona(V) sorbcijas izpēte uz modificētiem biomateriālu sorbentiem

“…Tiek izmantoti arī dažādi minerāli, piemēram, adsorbcijai var izmantot kaolinītu [13], gibsītu [14], diatomītu doi: 10.7250/msac.2013.027 102 [15], montmorilonītu, kas apstrādāts ar virsmaktīvām vielām [16], kā arī gētītu [17].…”

"HDTMA and TMPA Functionalized Organoclay for Adsorptive Removal of Antimony Sb (III) in Aqueous Solution"

“…Factors such as choice of clay minerals and cationic surfactants as well as the amounts of organic cations chosen might affect the efficacy and adsorption performance of organ minerals [23]. Anjum and Datta [28] studied the adsorptive removal of antimony (III) on modified clays at low concentration range (6μg/L to 100mg/L) and showed that montmorillonites modified with methylpyridinium chloride and cetyl trimethylammonium bromide are efficient adsorbents for the removal of low concentrations of antimonite. Bagherifam, et al [23] studied the effect of hexadecyl pyridinium chloride modified montmorillonite (HDPy+-M) and hexadecyl pyridinium bromide modified zeolite (HDPy+-Z) on Sb(III) uptake from solutions containing 0.5-2.5 mM antimonite, and their result was quite encouraging.…”

Preparation of MoO3/MoS2-E composite for enhanced photoelectrocatalytic removal of antimony from petrochemical wastewaters

“…Molybdenum drioxide (MoO 3) / molybdenum disulfide (MoS 2 ) composite is a core-shell nanorod with high surface properties [ 3 – 5 ]. Molybdenum disulfide (MoS 2 ) contained some active edge regions and exhibits crystallite properties [ 6 ].…”