Vol. 7 (4) : July-August 2016 issue
Green Farming Vol. 7 (4) : 958-961 ; July-August, 2016
Heavy metal contamination by waste disposal in soils of central Kerala
V. DIVYA VIJAYANa1* and P.K. SUSHAMAb2
aLand Use & Cover Monitoring Division, National Remote Sensing Centre, Balanagar, Hyderabad - 500 037 (Telangana)
bDeptt. of Soil Sci. & Agric. Chemistry, College of Hortic., Kerala Agric. University, Vellanikkara - 680 656 (Kerala)
Designation : 1Scientist *(diva_vij@yahoo.com), 2Professor
Subject : Soil Science & Agric. Chemistry; Soil Health & Soil Conservation Engg.
Paper No. : P-4080
Total Pages : 4
Received : 10 August 2015
Revised accepted : 23 May 2016
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Citation :
V. DIVYA VIJAYAN and P.K. SUSHAMA. 2016. Heavy metal contamination by waste disposal in soils of central Kerala. Green Farming Vol. 7 (4) : 958-961 ; July-August, 2016
ABSTRACT
Heavy metals occur naturally in the soil environment from the weathering of parent materials and also as contaminants at the waste disposing sites. The soil acts as a sink for heavy metals and other major nutrients and the excess uptake of any one of the heavy metals may limit the plant growth. With this perspective a study was conducted to investigate the extent of distribution of heavy metals (Ni, Cd, Cr, Pb, Hg and Co) at two waste dumping locations of Kalamassery at Ernakulam and Laloor at Thrissur district of Kerala during 2011-2015. The result revealed the average contents (mg kg-1) of Pb, Co, Ni, Hg and Cr was 15.58, 6.06, 43.18, 0.56, 107.9 at Kalamassery and 82.84, 7.79, 35.54, 0.42 and115.67 at Laloor respectively. The percentage distribution of Pb, Ni, Co, Cr and Hg at the different sites of Kalamassery revealed that Cr had the highest distribution followed by others. At Laloor, Pb was found to be dominant for the major dumping sites, and Cr at non dumping site. The geo accumulation index for Hg was recorded as above one for all sites at Kalamassery and the dumping sites at Laloor. All the sites of Kalamassery (dumping and non-dumping) and the dumping site of Laloor registered moderate degree of contamination for all the heavy metals under study
Key words :
Contamination factor, Geo accumulation index, Modified contamination degree, Waste dump yard.