BTEX contamination of Bengaluru aquifers, Karnataka, India

Rao, Sudhakar M and Joshua, Rita Evelyne and Arkenadan, Lydia (2017) BTEX contamination of Bengaluru aquifers, Karnataka, India. In: Journal of Environmental Engineering and Science, 12 (3). pp. 56-61. ISSN 1496-2551

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Abstract

Leakage from underground storage tanks (USTs) in petrol filling stations is a recognised pathway for contamination of aquifers by benzene, toluene, ethylbenzene and xylene (BTEX) compounds. Bengaluru City, India, partially depends on groundwater for potable water and has a specific climatic condition of wet and dry seasons. Hence, the influence of temporal rainfall variations on possible BTEX contamination of groundwater from leaky USTs was examined by testing tube-well samples located at petrol filling stations and their vicinities in Bengaluru City during pre- and post-monsoon periods. Groundwater samples were collected from tube wells located at petrol filling stations or their vicinities during post-monsoon (September 2015–January 2016) and subsequent pre-monsoon (March–April 2016) periods. Variations in BTEX concentrations during post- and pre-monsoon periods highlighted the influence of season on BTEX concentrations in the aquifer, as higher BTEX concentrations were generally observed in groundwater samples during post-monsoon than pre-monsoon. The results of the study show that BTEX contamination of Bengaluru aquifers from leaky USTs in petrol filling stations is not extensive as only 5% of groundwater samples showed benzene presence in excess of the permissible limit, while toluene, ethylbenzene and xylene compounds were below permissible limit in all the 124 groundwater samples.

Item Type:	Journal Article
Publication:	Journal of Environmental Engineering and Science
Publisher:	ICE Publishing
Additional Information:	The Copyright of this article belongs to the ICE Publishing
Keywords:	Environment; Groundwater; Pollution; Aquifers; Atmospheric thermodynamics; Benzene; Contamination; Ethylbenzene; Filling; Filling stations; Gasoline; Groundwater; Groundwater resources; Hydrogeology; Pollution; Potable water; Toluene; Xylene; Btex contaminations; Climatic conditions; Environment; Post-monsoon; Post-monsoon period; Temporal rainfall variation; Underground storage tanks; Wet and dry seasons; Groundwater pollution
Department/Centre:	Division of Mechanical Sciences > Centre for Sustainable Technologies (formerly ASTRA) Division of Mechanical Sciences > Civil Engineering
Date Deposited:	15 Jun 2022 06:02
Last Modified:	15 Jun 2022 06:02
URI:	https://eprints.iisc.ac.in/id/eprint/73559

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