Analytical Sciences

Separation and Enrichment of Arsenic(V) with Composite Resin Beads Containing Magnetite Crystals

Yoshito WAKUI,* Anna E. PERSULESSY,** Takuji IKEDA,* Takeo EBINA,* Yoshio ONODERA,* and Toshishige M. SUZUKI*

*National Institute of Advanced Industrial Science and Technology (AIST), 4-2-1, Nigatake, Miyagino, Sendai 983-8551, Japan
**Research Center for Chemistry, Indonesian Institute of Sciences, Bandung, Indonesia

The adsorption of arsenic(V) was investigated using macroporous resin beads containing magnetite crystals. Arsenic(V) was favorably adsorbed at pH 2 - 9, where the distribution coefficients were larger than 10³. The maximum capacity was 0.050 mmol/g. Metal cations including Ca(II), Mn(II), Co(II), Ni(II), Cu(II), Zn(II) and La(III) did not give serious interference at 10^-4 M level. Diluted arsenic(V) was collected with a packed column, and the retained arsenic(V) was quantitatively eluted out with 1 M NaOH.

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