Document Type : Research Paper


Department of Medicinal Plant Production, Khabat Technical Institute,Erbil Polytechnic University ,Erbil, Iraq;


Wastewater contains a high amount of toxic metal substances (cadmium, chromium, lead, copper and cobalt) which have a negative effect on the soil and plants.
This study was conducted to determine the effect of untreated sewage seepage into the main sewers of Khabat region and on the chemical and physical properties of the soil. The concentration of some heavy metals cadmium(Cd)- copper(Cu)- lead(Pb) - chromium –(Cr)- cobalt(Co) was also estimated, as well as soil electrical conductivity (EC), total dissolved salts (TDS), and total hardness (TH). Soil samples were taken on depth ranges from 10-15 cm. Compared to control samples, which were taken 200 mlength from the main stream and were not affected by untreated sewage,Soil samples near the main stream containmuch higherconcentrations of elements cadmium (Cd), copper (Cu), lead (Pb), chromium (Cr), and cobalt (Co).
The concentration of these elements in the soil increased with the increase in the percentage of dissolved salts, which in turn led to an increase in the soil's hardness and overall conductivity. This indicates that the soil near the main stream is contaminated: which fundamentally affects the flora and fauna of the area. The study recommended a solution to the problem of the location of sewage in the Khabat area, not throwing untreated water directly into the ground to prevent pollution and groundwater access, and making efforts to use this water after treatment for various purposes.


Main Subjects

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