Geochemical phases of soil and the bioaccessibility of some elements in soils and vegetables from boron mines
Özet
The bioaccessibility of some elements (As, B,
Cd, Cu, Fe, Mn, Ni and Zn) in soils and vegetables was
determined using the physiologically based extraction
test. An investigation of the geochemical phases of soils
through sequential extraction methods followed by ICPMS detection was also undertaken. Samples were collected from Iskele, Begendikler and Yolbasi villages in
the Bigadic region and Yildiz village in the Susurluk
region of Balikesir province, Turkey. All of these villages are close to boron mines. Principal component
analysis and correlation analysis demonstrated the interrelationship between the bioaccessibility values of these
elements in the gastric and intestinal extracts of soils as
well as the plant samples grown in those soils and the
elements’ concentrations in the different soil fractions.
From the bioaccessible concentrations of the elements in
the intestinal phases, it was shown that the amounts of
As, B, Cu, Mn and Ni in some plant samples were
higher than the recommended and tolerable values for
human consumption. The bioaccessibilty of these elements in the soils and plants were statistically related
with the concentrations of these elements in the labile
phases of the soil. The methodology adopted here would
be applicable to determining interactions between elements and soil fractions and the interrelationships between bioaccessibility data and soil fractions for any soil
samples.
