Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7842496 | Journal of Molecular Liquids | 2018 | 43 Pages |
Abstract
Experimental design has been applied to consider any possible interaction between process parameters with fewer experiments as well as to create a response model influenced by several factors and to optimize the response. In this study, response surface methodology (RSM), which is cost-effective and less laborious for process optimization has been applied to observe the performance of amino-functionalized poly (glycidyl methacrylate) as adsorbent (AR) in the 2,4-dichlorophenoxyacetic acid (2,4-D) adsorption from aquatic media in terms of adsorbent dose (0.0125-0.05 g), temperature (20-30 °C) and stirring speed (100-200 rpm). The greatest adsorption capacity was calculated as 99.4470 mg gâ1 for 100 mg/L solution under the optimal conditions (0.05 g of adsorbent and 100.01 revolution speed per minute at 28.725 °C). on the other hand, experimental outcome displayed that 2,4-D adsorption on the adsorbent was notably quick, where >83% of the adsorption occurred within the first 15 min, and reached almost equilibrium at 60 min and the adsorbent had a relatively high adsorption capacity changing between 100 and 450 μmol/g (20-100 mg gâ1) according to adsorbent dosage. The rate of adsorption was represented by both pseudo-second-order and Elovich models more efficiently than the pseudo-first-order kinetic model. The equilibrium data were found to be compatible with the relevant isotherm models such as Langmuir (1-4), Freundlich and Dubinin-Radushkevich (DRK). The findings of the thermodynamic study indicate that the concerned adsorption system is applicable, endothermic and enthalpy driven.
Related Topics
Physical Sciences and Engineering
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Physical and Theoretical Chemistry
Authors
Selin Åahin, Serkan Emik,