Volume No. 9 Issue No.: 3 Page No.: 605-612 January-March 2015

 

ACCUMULATION OF TRACE METALS IN SOIL AND TREES BY THE HIGHWAY PASSING THROUGH AN ECOLOGICAL HERITAGE AREA

 

Upasona Devi, Raza Rafiqul Hoque and Kali Prasad Sarma*

Department of Environmental Science, Tezpur University, Tezpur, Assam (INDIA)

 

Received on : October 07, 2014

 

ABSTRACT

 

Multi element profile of roadside soil and barks of trees grown in roadside were analyzed in samples collected from NH-37 that passes through Kaziranga National Park , which has been recognized as an World heritage site by UNESCO. The concentration of metals in both the matrices shows sever input from anthropogenic sources. The Enrichment Factor (EF) calculated for metals of roadside soil showed enrichment of Cd, Cr, Cu and Pb. The EF and transfer factors calculated for roadside plants showed metal accumulation in the barks of trees grown in roadside of the highway. The Pearsonís correlation showed inter-metal relationship and the pattern of relationships suggested vehicular contribution of the metals originating from the highway.

 

Keywords : Heavy metal, Enrichment factor, Transfer factor, Highway, Pearsonís correlation

 

 

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