Vol. 10, Issue 5 (2021)

Author(s):
Manchala Santhosh, PS Sangwan and E Sathyanarayana

Abstract:
This study was carried out to determine the distribution and concentration of heavy metals (Cu and Co) in roadside soils along the three different traffic routes (National & State Highways; and local route of Hisar district) of Haryana. Soil (surface & sub-surface) and plant samples were collected from six locations for each traffic route at four different distances (10m, 50m, 100m and 500m) using Global Positioning System (GPS). For estimating concentration of copper and cobalt, 200 gm of soil was taken in 500 ml capacity plastic container without any addition of heavy metals. The moisture in the soil was maintained at field capacity. The sampling was done at periodical incubation intervals (0, 20, 30, 40, 50 and 60 days after incubation) for the estimation of DTPA-extractable Cu and Co. The Periodical changes in concentration of heavy metals showed that in general as the period of incubation increased, a gradual decrease in DTPA-extractable Cu and Co was noticed up to 60 days after incubation (DAI). Based on the study, it is concluded that all heavy metal contents (Cu and Co) in roadside soils were found within the permissible limits as per WHO, FAO and Indian standards.