Spatial distribution of heavy metals density in cultivated soils of Central and East Parts of Black Sea Region in Turkey

Year 2017, Volume: 6 Issue: 3, 197 - 205, 01.07.2017

Mehmet Arif Ozyazici , Orhan Dengiz , Gulen Ozyazici

https://doi.org/10.18393/ejss.287976

Cited By: 14

Abstract

Heavy metal contamination has caused serious
environmental and health-related problems around the world. To identify the
concentrations and sources of heavy metals, 3400 surface soil samples (0-20 cm
depth) were collected from the study area. Subsequently, the concentrations of
Cd, Co, Cu, Ni, Pb and Zn in the samples were measured. In order to evaluate
natural or anthropogenic sources of heavy metal content and
their spatial distribution in agricultural fields of
Central and East Parts of Black Sea Region soil geostatistic
approach were combined with geographic information system
(GIS). GIS technology was employed to produce spatial
distribution maps of the 6 elements in the study area. The results showed that the
concentration of Ni and Co exceeded its threshold level. The local pollution
from Ni was attributed to the natural influences. The concentrations of the
other heavy metals are relatively lower than the critical values. The mean
values of the heavy metal contents arranged in the following decreasing order: Ni
> Zn > Cu >Pb> Co > Cd in the study area. On the other hand,
according to distribution ratio of heavy metals in total soil samples, except
for Co and Ni distribution in total soil samples, all other heavy metal element
exceeded concentration in samples were determined about less than 10% total
soil samples. However, in some regions of the study area, the Cd, Cu and Zn
contents were also slightly raised, this case possibly stem from excessive P
fertilization and field traffic. 

Keywords

Heavy metal contamination, GIS, soil properties

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