ISSN 2736-1586
African Journal of Geography and Regional Planning ISSN 3627-8945 Vol. 6 (7), pp. 001-009, July, 2019. © International Scholars Journals
Full Length Research Paper
Investigation of heavy metals in crystalline aquifer groundwater from different valleys of Bangalore, Karnataka
M. Jiban Singh1, R. K. Somashekar 1*, K. L. Prakash1 and K. Shivanna2
1Department of Environmental Science, Jnana Bharathi, Bangalore University, Bangalore-56, India.
2Isotope Hydrology Section, IAD, Division Bhabha Atomic Research Centre, Mumbai-85, Maharashtra, India.
Accepted 12 March, 2019
Abstract
Fifty-one groundwater samples were collected during South-west monsoon 2009 from Challaghatta, Vrishabhavathi, Kormangala and Hebbal valleys, Bangalore, which is an unconfined/crystalline aquifer to investigate Fe, Mn, Cu, Zn, Pb, Cd, Cr, Ni concentrations and other parameters like temperature, pH, electric conductivity (EC) and total dissolved solid (TDS). The TDS and EC variation confirmed light-salty nature of groundwater found to be contaminated by Salty water intrusion, which is attributed to over-extraction. Comparison between presence, abundance and frequencies of trace elements in groundwater samples is in the order of Fe (84) > Zn (72) > Mn (68) >Pb (45) >Cu (41) >Cr (35) >Ni (33) >Cd (21), indicating that Fe in groundwater is in origin. The TDS, Pb, Fe, Mn and Cd concentrations in groundwater samples are beyond the permissible limit prescribed by World Health Organization (WHO).
Key words: Groundwater, heavy metals, lithologic physico-chemicals, sewage.