A GIS Based Assessment of Lead, Arsenic, Cadmium and Aluminium Contamination of Ground Water in Dhemaji District of Assam, India

Abstract

The study investigated the environmental attribute of ground water of Dhemaji district of Assam for
risk assessment due to heavy metals mobilization into biosphere. Thirty ground water samples were analyzed for
the lead, arsenic, cadmium and aluminium contamination. The research foundation was derived through the
experimental observations. Analytical determinations of heavy metals contents were performed by Atomic
Absorption Spectrometer, Perkin Elmer AA 200 model. Multivariate Geospatial analyses were performed, using
GIS (Geographic Information System) techniques and statistical analysis with the help of SPSS® statistical
package (Window Version 10.0). The investigations revealed that the metals concentration in the study area
ranged from 0.16 to 0.36 mg/L, BDL to 15.25 µg/L, BDL to 0.11 mg/L and BDL to 6.80 mg/L for lead, arsenic,
cadmium and aluminium respectively. Top priority should be given to frequent monitoring of the status of
groundwater in the study area.