GEOC 114 |
| Kuldeep Singh, Department of Soil Science, Department of Soil Science, CCS, Haryana Agricultural University Hisar, India, House no 9/15 old campus CCS HAU, Hisar, Hisar, 125004, India |
| Municipal sewage water mixed with industrial effluents represents one of the most important sources of metal contaminations in soils. Seventy three surface soil samples were collected around the cities of Rohtak, Sonipat, Panipat and Sirsa districts of Haryana state, Northern India, primarily representing sewage water and industrial effluents used soils. The samples were analysed for relevant soil properties and concentrations of Co, Cu, Fe, Mn, Pb and Zn were determined by flame atomic absorption spectrophotometry. Soil pH varied from 6.9 to 8.7, EC from 0.24 to 4.20 dSm-1 with a mean value of 1.24 dSm-1 and organic carbon content form 0.30 to 2.90 per cent with an average value of 0.86 per cent. The CaCo3 content rnaged from traces to 9.4 per cent with a mean value of 2.11 per cent. The DTPA extractable Co, Cu, Fe, Mn, Pb and Zn in soil samples, varied from 0.05 to 0.99, 1.40 to 63.15, 3.54 to 98.77, 1.25 to 18.72, 0.70 to 25.93 and 0.55 to 17.50 mg/kg with the corresponding mean values of 0.27, 11.97, 26.26, 9.13, 6.26 and 9.48 mg/kg, respectively. The comparatively higher concentrations of these heavy metals in comparison to normal soils has resulted from the addition of these elements through the continuous application of raw sewage waters. These sewage waters must be analysed for their chemical composition before their use for irrigation purposes because their composition depend upon the source of industrial effluents discharged into domestic sewer. There is a need for periodic assessment of build-up below maximum permissible concentration of the heavy metals in agricultural soils using sewage waters for irrigation as these soils pose a greater risk when vegetables and fodder crop grown on metal polluted soils form a significant part of human and animal diet specially in most of the developing countries of the world.
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Poster Session
6:00 PM-9:00 PM, Tuesday, March 30, 2004 Anaheim Convention Center -- Hall A, Poster
Division of Geochemistry |