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.
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