Trace Element Concentration at Sanitary Landfill Sites in Parts of Delhi

The sanitary landfill sites have occupied a considerable area especially the depression zones in parts of Delhi. Unfortunately, till date Delhi doesn’t have any exclusive hazardous tracts landfill site. The municipal solid waste are mixed up with hazardous waste e.g hospital waste, industry waste and other toxic waste and deposited at different sanitary landfill sites. Thus the leachate forms from these site are toxic in nature occurred and contribute the physical, chemical and biological contaminant by their movement to the shallow ground water level. It is found that the of leachate at Bhalswa landfill sites contain the heavy metals like Iron, Manganese, Cadmium, Lead, Copper, Chromium, Nickel and Zinc.The study indicates that the leachate when mixed with rainwater then it infiltrates more and mixed up with ground water. However the movement of trace metals sets restricts by the impervious geological formation as quartzite rocks at Okhla within 3 meter depth and a impervious clay at Ghazipur at 5 meter depth.The infiltration of trace metals is recorded more at Bhalswa Sanitary Landfill Site because of pervious sandy beds at shallow depth of 4 meter clay. It is recommended that the farther site may be explored in the western part of Delhi or location having shallow clay formation in order or restrict the movement of trace metals to contaminate the ground water. Apart from these more suggestion have been given for engineers, scientists and research workers in this direction.