NDLI: Mixing ratios of carbonyls and BTEX in ambient air of Kolkata, India and their associated health risk

Content Provider	Springer Nature Link
Author	Dutta, C. Som, D. Chatterjee, A. Mukherjee, A. K. Jana, T. K. Sen, S.
Copyright Year	2008
Abstract	Mixing ratios of 15 carbonyls and BTEX (benzene, toluene, ethyl benzene, xylenes) were measured for the first time in ambient air of Kolkata, India at three sites from March to June 2006 and their photochemical reactivity was evaluated. Day and nighttime samples were collected on weekly basis. Formaldehyde was the most abundant carbonyl (mean concentration ranging between 14.07 μg m−3 to 26.12 μg m−3 over the three sites) followed by acetaldehyde (7.60–18.67 μg m−3) and acetone (4.43–10.34 μg m−3). Among the high molecular weight aldehydes, nonanal showed the highest concentration. Among the mono-aromatic VOCs, mean concentration of toluene (27.65–103.31 μg m−3) was maximum, closely followed by benzene (24.97–79.18 μg m−3). Mean formaldehyde to acetaldehyde (1.4) and acetaldehyde to propanal ratios (5.0) were typical of urban air. Based on their photochemical reactivity towards OH· radical, the concentrations of the VOCs were scaled to formaldehyde equivalent, which showed that the high molecular weight carbonyls and xylenes contribute significantly to the total OH-reactive mass of the VOCs. Due to the toxic effect of the VOCs studied, an assessment for both cancer risk and non-cancer hazard due to exposure to the population were calculated. Integrated life time cancer risk (ILTCR) due to four carcinogens (benzene, ethyl benzene, formaldehyde and acetaldehyde) and non-cancer hazard index for the VOCs at their prevailing level were estimated to be 1.42E−04 and 5.6 respectively.
Starting Page	97
Ending Page	107
Page Count	11
File Format	PDF
ISSN	01676369
Journal	Environmental Monitoring and Assessment
Volume Number	148
Issue Number	1-4
e-ISSN	15732959
Language	English
Publisher	Springer Netherlands
Publisher Date	2008-01-25
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	BTEX Carbonyls Kolkata Hydroxyl radical reactivity Health risk assessment Environmental Management Ecology Atmospheric Protection/Air Quality Control/Air Pollution Ecotoxicology
Content Type	Text
Resource Type	Article
Subject	Pollution Medicine Management, Monitoring, Policy and Law

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