Volume No. 10 Issue No.: 3 Page No.: 451-462 Jan-Mar 2016

 

DISSIPATION PATTERN OF TRACE METALS FROM SOIL TO LEAVES IN TEA GARDENS OF ASSAM, INDIA

 

Tamuly P., Devi G. and Devi A.

Resource Management and Environment Section, Institute of Advanced Study in Science and Technology, Paschim Boragaon, Guwahati, Assam (INDIA)

 

Received on : September 10, 2015

 

ABSTRACT

 

In the present study, five tea gardens located along National Highway-37, Assam were selected for collection of soil (0-15cm) and leaf samples. Four samples were collected from each tea garden at different distances from the road to examine possible contamination from vehicular traffic. Present study has been aimed at determining the level of heavy metals in the tea garden soils and the dissipation pattern of metals from soil to leaves. Results obtained revealed the decrease of metal concentration in soil with the increase of distances from the road, which indicates contamination of soil from vehicular traffic. Contamination Factor (Cf) was calculated using background values as baseline to assess the contamination level of soil with trace metal, which indicates moderate contamination in most of the cases and considerable contamination in few cases. Transfer Factor (TF) was calculated to investigate the dissipation pattern of metals from soil to leaves. Calculated Transfer Factor (TF) indicates the higher dissipation for Cu, Zn and Mn and lower dissipation for the toxic Pb, Cr and Ni. Comparison was also attempted with the background samples and some international maximum permissible limits.

 

Keywords : Contamination factor, Heavy metal, Tea garden soil, Tea leaves, Transfer factor

 

 

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