Improve the removal of Th(IV) ion by using the inorganic complexing agent in the structure of Amberlite resin
Publish Year: 1396
نوع سند: مقاله کنفرانسی
زبان: English
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شناسه ملی سند علمی:
CBGCONF04_031
تاریخ نمایه سازی: 22 دی 1396
Abstract:
An Amberlite XAD-4 resin loaded with a tetradentate Schiff base bis(2-hydroxybenzaldehyde)-1,2-ethylendiimine (HL) was used for the removal of thorium ions from aqueous solution.(HL). Under optimal conditions (pH=5, adsorbent dosage 0.1 g, contact time 45 min. and at temperature of 25oC) for thorium ions (20 mg/L) were quantitatively removed from 20 ml of the sample solution. A shift for uptake of the metal ions vs. pH curves towards lower pH the values by applying the loaded resin with Schiff base compared with unloaded ones (about ΔpH0.5=1.9). The kinetic data corresponds well to the pseudo-second-order equation. This model predicts chemisorption for the adsorption. Thermodynamic investigation reveals that the adsorption process of the studied ions is entropy driven.
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Authors
Zahra Shiri-Yekta
Material and Nuclear Fuel Research School, Nuclear Science and Technology Research Institute, P.O. Box ۱۱۳۶۵/۸۴۸۶,Tehran, Iran