Many of the pollutants emitted from municipal solid waste incinerator (MSWI) have been
classifi ed by the International Agency for Research on Cancer (IARC) as carcinogenic to
humans. This study adopted the Human Health Risk Assessment (HHRA) model of the
U.S. EPA to estimate both the lung and skin cancer risks contributed by arsenic, cadmium,
chromium, nickel and dioxin to people living near the proposed MSWIs in Lamphun and
Surat Thani Provinces in the Northern and Southern Regions of Thailand, of which both
locations, waste input was 231 tons/day. The estimated lifetime of cancer risk (LCR) was
based on the maximum annual average concentration of compounds of potential concern
(COPCs) predicted by the Air Quality Model (AERMOD). Three potential pathways were
calculated in this study, namely, inhalation, ingestion and dermal contact, with 2 scenarios
of residents who were exposed from birth and during adulthood. Results show that the
lung-cancer risk values exceeded the reference level (E-06) in the range of 1.06E-06 to
4.41E-06 for both scenarios and locations. For the skin-cancer risk values did not exceed
the reference level in the range of 1.63E-07 to 2.43E-07. Chromium contributed a greater
impact to cancer risk as compared to other pollutants.etc...
Keywords
Municipal solid waste incinerators; Air-quality modeling; Heavy metals; Dioxins; Health risk assessment; Cancer risk
ENIVRONMENT ASIA
Published by : Thai Society of Higher Education Institutes on Environment Contributions welcome at : http://www.tshe.org/en/
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