Author/Authors :
Rana، L نويسنده Ecology Laboratory, Department of Environmental Sciences, Maharishi Dayanand University, Rohtak, Haryana, India , , Dhankhar، R نويسنده Ecology Laboratory, Department of Environmental Sciences, Maharishi Dayanand University, Rohtak, Haryana, India , , Chhikara، S نويسنده Ecology Laboratory, Department of Environmental Sciences, Maharishi Dayanand University, Rohtak, Haryana, India ,
Abstract :
:The long term effects of sewage water irrigation on soil properties and heavy metal concentra-
tions at Rohtak city, Haryana (India) was investigated. At each location, soil samples were collected from the
upper layer (0-10cm) for determination of various physico-chemical parameters. Heavy metals (Pb, Cu, Mn,
Zn, Cd, Ni, and Fe) were also determined. The chemical analysis of sewage effluent showed that total salt
concentration and heavy metal content was high compared to ground water but within the safe limits. Thus,
sewage effluent remained within permissible limits for use as irrigation water. Soil analysis revealed that
organic carbon, phosphorus, calcium and magnesium content were high in sewage irrigated soils compared to
tube well irrigated soils. The soil pH decreased by 0.38 units as a result of sewage water irrigation. The
continuous application of untreated sewage effluent for last 35 years resulted into significant accumulation of
nutrients and heavy metals in soils. Organic carbon content showed positive correlation with all heavy metals
except Zn while pH had negative correlation with all metals except Mn. Electrical conductivity had a positive
correlation with all metals.
