Sains Ma1aysiana 25(2): 35-39 (1996)                                                                          Sains Fizis dan Gunaan/

                                                                                                                                     Physical and Applied Sciences

Penspesiesan Ion-ion Ferum dengan Resin Poli

(Asid Hidroksamik)

(Speciation of iron ions using poly(hydroxamic acid)) resin

Wan Md Zin Wan Yunus & Md Jelas Haron

Jabatan Kimia

Fakulti Sains dan Pengajian Alam Sekitar

Universiti Pertanian Malaysia

43400 UPM Serdang, Selangor D.E, Malaysia

ABSTRAK

Resin penukar ion poli(asid hidroksamik) telah dikaji untuk penspesiesan ion-ionferum. Pekali taburan menunjukkan resin ini mempunyai kepilihan yang tinggi terhadap ion ferik berbanding dengan ionferus. Pengekstrakan dengan kaedah turus mendapati ion ferik dari larutan asid sulfurik 0.01 dan 0.00lM boleh diesktrak secara kuantitatif manakala pengekstrakan ion ferus hanya 2% atau lebih kecil. Kajian lanjut menunjukkan resin ini boleh memisahkan ion ferik dari ion ferus dan pemisahan ini tidak diganggu oleh kehadiran ion-ion nikel, zink, kuprum, kalsium, klorida, bromida, nitrat dan sulfat.                   

ABSTRACT

Poly(hydroxamic acid) ion exchange resin was evaluated for speciation of iron(II) and iron(III) ions. Distribution coefficients indicate that the resin is more selective towards iron(III) ion. Column extractions show that iron(III) ion is quantatively extracted from sulfuric acid solutions at concentrations of between 0.01 to 0.00lM but only 2% or less of iron(II) ion is retained under these conditions. Further studies show that these two ions can be separated and their separations are not affected by the presence of nickel, zinc, copper, calcium, chloride, bromide, nitrate and sulphate.

RUJUKAN/REFERENCES

Baumann, E,W. 1992. Colorimetric determination of iron (II) dan iron (III) in glass. Analyst 117: 913-916. 

Herrera, L., P. Ruiz, J.E. Aguillon & A Ferhman. 1989. A new spectrophotometry method for the determination of ferrous iron in the presence of ferriciron. J. Chem. Tech. Biotechnol. 44: 171-11.

Kanai, Y. 1990. Simultaneous determination of iron (II) and iron (III) oxides in geological materials by ion chromatograpy. Analyst 115: 809-812.

Kennedy, C.D. 1990. Determination of iron (III)-iron (II) mixtures by differential-pulse       polarography in solutions containing ammonnium tartarate and Good buffer. Analyst 115: 1067-1071.

Kurzak, B., H. Kozlowski & E. Farkas. 1992. Hydroxamic and aminohyroxamic acids and their complexes with metal ions. Coordination Chem. Reviews 114: 160-200

Liu C.Y. & P.J. Sun. 1981. preparation and analytical properties of a chelating resin containing cysteine groups. Anal. Chim. Acta 132: 183-193.

Moses, C.O., AT. Herlihy, J.S. Herman & AL. Mills. 1988. Ion-chromatographic analysis of mixture of ferrous and ferric iron. Talanta 35: 15-22.

Nigo, S., K. Yoshimura & T. Tarutani. 1981. Ion-exchanger colorimetry – VII Microdetermination of iron (II) and iron (III) in natural water. Talanta 28: 669-674.

Vernon, F. & H. Eccles. 1976. Chelating ion-exchangers containing N-substituted hydroxylamine functional groups. Part 1 N-aroylphenylhydrxylamines. Anal. Chim. Acta 77: 145-152.

Wan Yunus, W.M.z. & Z. Ahmad. 1988. Preparation of a poly (hydroxamic acid) resin from poly(ethyl acrylate) and its properties. Pertanika 11: 255-259.