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International Journal of Advanced Chemistry Research

Vol. 5, Issue 1, Part A (2023)

Selective micro extraction of rare earth elements and yittrium in rock samples using silica modified with xylenol orange and their determination by ICP-AES

Author(s):

Bincy Cyriac and AA Patwardhan

Abstract:

A systematic study on the selective extraction of rare earth elements (REEs) and yttrium onto silica modified with xylenol orange (SMXO) was carried out and a scheme for the pre-concentration and separation of REEs and Y in rock samples is discussed. A simple single step preparation of silica and its modification by xylenol orange in presence of cetyltri-methylammonium bromide is enumerated. Characterisation of prepared adsorbent was carried out by surface area analysis, IR data and SEM data. REEs and Y were adsorbed onto SMXO at pH ≥ 3 and after a contact period of 30 minutes. Adsorbed REEs and Y were eluted from SMXO with 0.5% (w/v) EDTA solution. Aluminium and iron when present above 200 mg/L were interfering in the analysis of REEs. Aluminium interference was eliminated by removing it as sodium aluminate in the fusion stage of rock samples. Interference of Fe3+was avoided by reducing Fe (III) to Fe (II) using hydroxylamine hydrochloride. Separated REEs were determined by ICP-AES. The proposed method is simple, accurate and the precision is characterized by the % RSD ranges from 2.0-5.1% at the determination limit ranging from 0.2-5µg/mL.

Pages: 10-15  |  353 Views  116 Downloads


International Journal of Advanced Chemistry Research
How to cite this article:
Bincy Cyriac and AA Patwardhan. Selective micro extraction of rare earth elements and yittrium in rock samples using silica modified with xylenol orange and their determination by ICP-AES. Int. J. Adv. Chem. Res. 2023;5(1):10-15. DOI: 10.33545/26646781.2023.v5.i1a.137