Abstract
Kinetic experiments were performed to induce of the green methyl dye adsorption from aqueous solution on the bauxite clay. This study includes determination of the adsorption capacity of bauxite clay to methyl green dye adsorption and study the effect of some parameters ( temperature , time ) on the kinetic of the adsorption process of the dye were studied. Quantity of dye adsorbed was increased when the temperature increases from 298 to 318K which indicates that methyl green adsorption processes are endothermic nature . In order to describe the kinetic data and the rate adsorption constants of the pseudo-first-order and second-order kinetics were used . The kinetics data were applied well with the second-order kinetic model. From activation energy value (Ea) for methyl green dye are energetically favorable and the dye adsorption includes physical and chemical adsorption types
Highlights
The process of discharge of wastewater containing different amounts of dyes in the rivers, seas and oceans causes environmental problems because of the difficulty of disposing of them because of their non-biodegradable nature
Figure (2) shows adsorption process including two stages, the one stage was very rapid through the first (5) min for bauxite clay, and the two stage was increased slowly with time until reaching equilibrium at this time the amount adsorbed of methyl green dye on bauxite clay was reached to saturation
At this time represented case of dynamic equilibrium between the quantity of dye being adsorbed by bauxite clay with the quantity of the dye desorbing from the bauxite clay
Summary
The process of discharge of wastewater containing different amounts of dyes in the rivers, seas and oceans causes environmental problems because of the difficulty of disposing of them because of their non-biodegradable nature. [9] The aim of this paper is to study the kinetics of adsorption of green dye using bauxite clay as adsorbents. A set of contact time experiments for the methyl green dye has been implemented with constant initial dye concentration of 16mg/l at temperature 298K Figure (2).
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