Trace element distribution and risk assessment in South Indian surface waterways

Guruge, Keerthi S and Goswami, P and Watanabe, I and Abeykoon, S and Prabhasankar, V.P and Binu, K R and Joshua, D I and Balakrishna, K and Akiba, Masato and Munuswamy, N (2016) Trace element distribution and risk assessment in South Indian surface waterways. International Journal of Environmental Science and Technology, 20 (20). pp. 1-18. ISSN 1735-1472

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Official URL: http://link.springer.com/article/10.1007/s13762-01...

Abstract

The concentrations of 27 major and trace elements are determined in surface water samples collected from 48 sites of diverse waterways in four states (Tamil Nadu, Kerala, Karnataka, and Telangana) of South India. The aims of this study are to identify the element distribution, comparatively assess the pollution risk, and evaluate human health risks related to diverse waterways in the study area. The results indicate that elements such as Cr, Se, As, Fe, and Mn are the major pollutants, as their concentrations exceeded the acceptable national and international water quality standards in several sites of Ennore, Adyar, Cooum, Periyar, and Vrishabhavathi rivers. Furthermore, statistical analysis reveals that the Ennore, Adyar, Cooum, Periyar, and Kaveri river basins are affected by various anthropogenic activities, leading to moderate-to-high pollution by As, Cr, Mn, Fe, and Se. Potential pollution sources are industrial waste, sewage intrusion, paint industry waste, and automobile runoff. Overall, the investigated sites are categorized into three major groups: highly, moderately, and least polluted. Risk on human health by metals is then evaluated using hazard quotients (HQs) and carcinogenic risk evaluation; the results indicated that As with HQ[1 is the most hazardous pollutant, which could lead to non-carcinogenic and carcinogenic concerns, particularly in children. This study helps in establishing pollutant loading reduction goal and the total maximum daily loads and consequently contributes to preserving public health and developing water conservation strategies

Item Type: Article
Uncontrolled Keywords: Surface water � Trace element pollution � Arsenic � Hazard quotient � Carcinogenic risk � Public hea
Subjects: Engineering > MIT Manipal > Civil Engineering
Depositing User: MIT Library
Date Deposited: 15 Dec 2016 14:56
Last Modified: 15 Dec 2016 14:56
URI: http://eprints.manipal.edu/id/eprint/147709

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