Evaluation of the Parameters of Orange Peel for the Adsorption of Furadan

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Abstract:

In this study, orange peel was utilized as low-cost adsorbent to remove furadan from aqueous solution by adsorption. All the experiments were conducted at 30 °C to investigate the effects adsorbent dose, pH value and ionic strength on furadan adsorption and the optimal experimental conditions were ascertained. The percentage removal (%) increased with an increase in the initial adsorbent dose, whereas the value of qe (mg.g-1) decreased with an increase in the initial adsorbent dose .The curve of qe and removal percentage can be divided into two stages (first stage: adsorbent dose between 0.05 and 0.20 g; second stage: adsorbent dose between 0.25 and 0.35 g). The value of qe (mg.g-1) for OP increased as the pH increase, and reached the maximum at pH 7.81, then decreased as the pH continue increasing. The initial pH value of furadan solution should be controlled between 7.50 and 8.00. In addition, the value of qe decreased sharp as the initial Na+ concentration was increased from 0 to 2.5 ×10-3 mol.L-1, then, the value of qe was not significantly altered beyond the initial Na+ concentration 2.5×10-3 mol.L-1. Therefore in order to enhance adsorption efficiency of furadan by OP, the subsequent experiments were carried out in the low ionic strength of furadan solution.

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Advanced Materials Research (Volumes 864-867)

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408-412

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December 2013

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© 2014 Trans Tech Publications Ltd. All Rights Reserved

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