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The burden of disease attributable to ambient PM2.5-bound PAHs exposure in Nagpur, India

Etchie , Tunde Ogbemi and SaravanaDevi, Sivanesan and Etchie , Ayotunde Titilayo and Adewuyi , Gregory Olufemi and Kannan, Krishnamurthi and George, K.V and Rao, Padma S. (2018) The burden of disease attributable to ambient PM2.5-bound PAHs exposure in Nagpur, India. Chemosphere, 204. 277-289.

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Exposure to PM2.5-bound polycyclic aromatic hydrocarbons (PAHs) can elicit several types of cancer and non-cancer effects. Previous studies reported substantial burdens of PAH-induced lung cancer, but the burdens of other cancer types and non-cancer effects remain unknown. Thus, we estimate the cancer and non-cancer burden of disease, in disability-adjusted life years (DALYs), attributable to ambient PM2.5-bound PAHs exposure in Nagpur district, India, using risk-based approach. We measured thirteen PAHs in airborne PM2.5 sampled from nine sites covering urban, peri-urban and rural areas, from February 2013 to June 2014. We converted PAHs concentrations to benzo[a]pyrene equivalence (B[a]Peq) for cancer and non-cancer effects using relative potency factors, and relative toxicity factors derived from quantitative structure-activity relationships, respectively. We calculated time-weighted exposure to B[a]Peq, averaged over 30 years, and adjusted for early-life susceptibility to cancer. We estimated the DALYs/year using B[a]Peq exposure levels, published toxicity data, and severity of the diseases from Global Burden of Disease 2016 database. The annual average concentration of total PM2.5-bound PAHs was 458 ± 246 ng/m3 and resulted in 49,500 DALYs/year (0.011 DALYs/person/year). The PAH-related DALYs followed this order: developmental (mostly cardiovascular) impairments (55.1%) > cancer (26.5%) or lung cancer (23.1%) > immunological impairments (18.0%) > reproductive abnormalities (0.4%).

Item Type: Article
Subjects: Q Science > Q Science (General)
Depositing User: Dr Ayotunde Etchie
Date Deposited: 14 Aug 2018 11:11
Last Modified: 14 Aug 2018 11:11

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