Benzyl and methyl fatty hydroxamic acids based on palm kernel oil as chelating agent for liquid-liquid iron(III) extraction.

• Main Authors: Haron, Md Jelas, Jahangirian, Hossein, Silong, Sidik, Yusof, Nor Azah, Kassim, Anuar, Rafiee-Maghaddam, Roshanak, Mahdavi, Behnam, Peyda, Mazyar, Abdollahi, Yadollah, Amin, Jamileh
• Format: Article
• Language: English
• Published: Multidisciplinary Digital Publishing Institute 2012
• Online Access: http://psasir.upm.edu.my/id/eprint/18783/; http://www.mdpi.com/1422-0067/13/2
• Institution: Universiti Putra Malaysia

Liquid-liquid iron(III) extraction was investigated using benzyl fatty hydroxamic acids (BFHAs) and methyl fatty hydroxamic acids (MFHAs) as chelating agents through the formation of iron(III) methyl fatty hydroxamate (Fe-MFHs) or iron(III) benzyl fatty hydroxamate (Fe-BFHs) in the organic phase. The results obtained under optimized conditions, showed that the chelating agents in hexane extract iron(III) at pH 1.9 were realized effectively with a high percentage of extraction (97.2% and 98.1% for MFHAs and BFHAs, respectively). The presence of a large amount of Mg(II), Ni(II), Al(III), Mn(II) and Co(II) ions did affect the iron(III) extraction. Finally stripping studies for recovering iron(III) from organic phase (Fe-MFHs or Fe-BFHs dissolved in hexane) were carried out at various concentrations of HCl, HNO3 and H2SO4. The results showed that the desired acid for recovery of iron(III) was 5 M HCl and quantitative recovery of iron(III) was achieved from Fe(III)-MFHs and Fe(III)-BFHs solutions in hexane containing 5 mg/L of Fe(III).