Ağır Metal Analizlerinde Kullanılan Bazı Karayosunu Türlerinin Demir Absorplama Yetenekleri

Karayosunlarının bütün dünyada 23000 türü vardır ve ağır metal kirlilik çalışmalarında indikator olarak çok fazla kullanılmaktadır. Bu çalışmada, biz EDXRF spekrometre yöntemini kullanarak altı farklı karayosunu türünün demir absorplama kapasitesini ilk kez analiz ettik. 400 mesh’lik eleklerden elenerek 40 mg’lık tablet haline getirilen karayosunu örnekleri 241Am radyoaktif kaynağından yayılan 59,5 keV’lik fotonlara maruz bırakıldı. Numunelerden geçen fotonlar Ultra LEGe dedektörü ve buna bağlı çok kanallı analizör kullanılarak sayıldı. Altı farklı karayosunu türünün absorplama kapasiteleri, sırasıyla şu şekilde azaldığı bulunmuştur; Eurhynchium striatum, Hypnum cupressiforme, Pleurozium schreberi, Eurhynchium striatulum, Homalothecium sericeum ve Thuidium tamariscinum. Daha sonra, Türkiye’nin önemli sahil otoyollarında biri olan, Sarp-Samsun otoyolu boyunca farklı bölgelerden elde edilmiş karayosunu türleri için belirlenen Fe absorpsiyon seviyelerindeki muhtemel değişimlerle düzenledik.

Anahtar Kelimeler:

Karayosunu, Demir, Absorpsiyon, EDXRF

Iron adsorption capacity of some moss species used for heavy metal analysis

Mosses, covering about 23000 species of all land plants in the world, have been widely used as an indicator of heavy metal pollution in many studies. In this study, we have first analyzed the Iron adsorption capacities of six different moss species by means of using EDXRF spectrometry method. For analysis with EDXRF, the 40 mg tablets which were prepared from lichen and moss samples by sieving with 400 mesh, were irradiated by 241Am radioactive sources emitting 59,5 keV photons. Photons passed through the samples were counted by Ultra LEGe detector with multi channel analyser. The adsorption capacities of the studied six mosses are found in descending order as Eurhynchium striatum, Hypnum cupressiforme, Pleurozium schreberi, Eurhynchium striatulum, Homalothecium sericeum and Thuidium tamariscinum. Then, we have regularized the Fe adsorption levels for the moss species obtained from different regions along one of the important coast highway in Turkey, namely Sarp-Samsun highway, with respect to the determined adsorption capacities.

Keywords:

Moss, Iron, Adsorption, EDXRF,

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