Kireçli ana materyal üzerinde oluşmuş bir toprakta iyot adsorpsiyonu ve desorpsiyonu

Yıl 2014, Cilt: 2 Sayı: 2, 57 - 69, 26.12.2014

Muhittin Onur Akça Sadık Usta Mehmet Keçeci

Öz

İnsan sağlığı üzerinde önemli etkisi bulunan çoğunlukla da topraklarda yetersizliğinde guatr hastalığına yol açan iyodun topraktaki davranışlarının araştırıldığı bu çalışmada, kireç ana materyalli bir toprakta iyodun adsorpsiyonu ve desorpsiyonuna toprak bileşenlerinden; organik madde, kireç, serbest Fe/Al oksitlerin etkileri araştırılmıştır. Toprak bileşenleri tek tek ve birlikte giderilmiş topraklarda Langmuir ve Freundlich adsorpsiyon izotermleri uygulanmıştır. Adsopsiyon sıralaması ve maksimum adsorpsiyon değerleri; Fe/Al giderilmiş toprak (29,3 mg kg-1) > İşlem görmemiş toprak (19,3 mg kg-1) > hepsi giderilmiş toprak (15,4 mg kg-1) > organik maddesi giderilmiş toprak (10,5 mg kg-1) >kireci giderilmiş toprak (4,5 mg kg-1) şeklinde sıralanmıştır. Toprak bileşenlerinin etkisi Duncan’a göre önemli bulunmuştur. Desorpsiyon oranı sıralaması ise; kireci giderilmiş toprak > işlem görmemiş toprak > hepsi giderilmiş toprak > Fe/Al giderilmiş toprak > organik maddesi giderilmiş toprak şeklinde sıralanmıştır. Araştırma sonuçlarından adsorpsiyonda kirecin, desorpsiyonda da organik maddenin daha etkin olduğu görülmüştür

Anahtar Kelimeler

İyot, adsorpsiyon, desorpsiyon, langmuir eşitliği, freundlich eşitliği, kireç, organik madde, demir-alüminyum oksitler

Iodine adsorption and desorption in a soil formed on lime parent material

Öz

This study focuses on the behavior of iodine in the soil, which has an important effect on human health and which leads to goiter if deficient in the soil. Impacts of organic matter, lime, and free Fe/Al oxides on adsorption and desorption of iodine in the soil containing lime as the main substance are examined in this study. In order to study iodine adsorption and desorption in soil, we used Langmuir and Freundlich models in a calcareous soil before and after the removal of chemically active soil components, organic matter, lime and free Fe/Al oxides. The results indicated following order of adsorption and respective maximum adsorption values: soil deprived of Fe/Al (29,3 mg kg-1) > unprocessed soil (19,3 mg kg-1) > soil deprived of all (15,4 mg kg-1) > soil deprived of organic substance (10,5 mg kg-1) > decalcified soil (4,5 mg kg-1). The impact of soil components is found significant according to Duncan Test. With respect to desorption rates, the results were as follows: decalcified soil > unprocessed soil > soil deprived of all > soil deprived of Fe/Al > soil deprived of organic matter. According to these results, lime proved to have a greater effect on adsorption, with organic matter creating the greatest effect on desorption

Anahtar Kelimeler

Iodine, adsorption, desorption, langmuir equation, freundlich equation, lime, organic matter, ıron- aluminium oxides

Kaynakça

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