تشخيص أكاسيد الحديد في التربة باستخدام طيف الأشعة تحت الحمراء

Abstract EN

The study included five sites from the Nineveh and Dohuk governorates in northern Iraq.

These sites were selected depending on the difference in the rainfall lines, starting in Al Khuder area, southeast of Mosul, Tel-Osquf area in northern Mosul, Sumail area north-west of Duhok, Zawita area northeast of Duhok, and finally Batofa area east of Zakho.

A total of 5 soil profiles were excavated (one profile for each site).

Twenty-five soil samples were collected from these sites.

The results showed that iron oxides calculated as(Fe2O3) for the soil samples were less concentrated in the Al-Khuder soil (2, 998% ) and the highest concentrations were found in the Batofa soil (6, 056% ).

Infrared spectroscopy technique was highly efficient in the diagnosis of a low concentrations of iron oxides.

Infrared orption beams were used for laboratory-synthesised oxides and their mixtures as standard orption beams and for the diagnosis of iron oxides found in studied soils.

orption bands of stander hematite at frequencies (890, 801and 527cm-1) and a band overlapping with Freihydrite at 1353 cm -1.

Goethite showed several orption bandsbetween the frequencies of 3136 cm -1, 1423 cm -1, 878 cm -1, 794 cm -1 and the orpton band at the frequency of 624 cm -1.

While fryhydrite showed a very strong infrared orption band at 1345 cm -1, , plus two bands at792 cm -1, 834 cm -1 and a weak orption band at 1633 cm -1 with an overlapping bands with hematite at 536 cm -1 The studied soils were varied in their behavior toward infrared orption bands, differed in their effect on the orption of the three studied iron oxides (hematite, ferihydite and goethite)