User talk:Manish livestrong

Proposed deletion of Chemical properties of metal
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Speedy deletion of Manish chandwaney
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October 2008
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physico chemical
Long-term fate and behaviour of heavy metals in soil, treated with composted-municipal solid wastes (MSW), are largely unknown. Accordingly, we investigated some physico-chemical properties, the relative availability (RA) of heavy metals and Cd/Zn ratio in soils of a century old cultivated landfill site dumped with Calcutta - MSW during monsoon, winter and summer seasons of 1999 - 2001. This was done to assess the suitability of compost derived out of those for environmental concerns. The electrical conductivity (EC), total nitrogen (N), available phosphorus (P), carbonate content of soils were significantly highest in summer. The landfill soils recorded higher EC, organic-C, total N, available P, carbonate, and total, diphenyl triamine penta acetic acid (DTPA) and water-soluble heavy metals (Zn, Cu, Pb and Cd) including the RA, than the normal agricultural alluvial soil (ALV). Among the heavy-metals studied, the RA of Cu was more. The Cd/Zn ratio of the landfill soils ranged from 1.74 - 2.94% as against ALV (0.5%). The heavy metals species of the landfill soils were negatively correlated with the physico-chemical properties, and the coefficients were generally statistically significant, with the bioavailable forms (DTPA and water-soluble) in most cases. Data indicated the risk factors, involved in the long-term use of composted-MSW in soil.

Keywords: Landfill soil; physico-chemical properties; heavy metals; relative availabilities; Cd/Zn ratio; correlation

Document Type: Research article

DOI: 10.1080/0365034031000085246

Affiliations: 1: Institute of Agricultural Sciences Calcutta University 35, Ballygunge Circular Road Calcutta 700 019 India 2: Dr. B.C. Guha Centre for Genetic Engineering and Biotechnology Calcutta University 35 Ballygunge Circular Road Calcutta 700 019 India 3: Department of Agronomy Bidhan Chandra Krishi Viswavidyalaya P.O. Mohanpur Dist: Nadia West Bengal India