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| Primary Research on Health Risk Assessment of Heavy Metals in the Surrounding Soil and Air of a Municipal Solid Waste Incinerator（MSWI）, South China |
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| KeyWord:municipal solid waste incinerator（MSWI）; health risk assessment; heavy metal |
| Author Name | Affiliation | | ZHANG Hai-long | South China Institute of Environmental Science, Ministry of Environmental Protection；School of Environmental Science and Engineering, Guangzhou University | | LI Xiang-ping | School of Chemistry and Chemical Engineering, Guangzhou University | | QI Jian-ying | South China Institute of Environmental Science, Ministry of Environmental Protection
Key Laboratory of Agriculture & Environmental Pollution Control of Guangzhou Province | | CHEN Yong-heng | School of Environmental Science and Engineering, Guangzhou University | | LIN Bi-gui | South China Institute of Environmental Science, Ministry of Environmental Protection | | REN Ming-zhong | South China Institute of Environmental Science, Ministry of Environmental Protection | | FANG Jian-de | South China Institute of Environmental Science, Ministry of Environmental Protection |
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| Abstract: |
| The exposure and health risk assessment of heavy metals of the surrounding municipal solid waste incinerator（MSWI） was evaluated using the US EPA risk assessment model. The carcinogenic health risk results showed that risk values of Cr via inhalation were 2.15×10-4~5.75×10-4 for children and 8.59×10-4~2.30×10-3 for adult, higher than the risk threshold level 1. The highest values of As and Pb were 1.84×10-6 and 1.60×10-6, lower than the acceptable level; The carcinogenic health risk values of heavy metals via inhalation exposure were Cr>As>Pb with lower value for children than adult, and the value was reduced with the increased distances to MSWI. The carcinogenic health risk of heavy metals via dermal contact exposure was within acceptable level and higher for adults than children. The carcinogenic health risk order of heavy metals was As>Pb>Cr. The carcinogenic health risk of heavy metals via ingestion exposure was also within acceptable level and higher for children than adults, with the carcinogenic risk order as Cr>Pb>As. The hazard index of Tl for children was 1.02~1.40, higher than the safety threshold level（=1）, indicating the potential carcinogenic risk to children. The highest value of Tl for adult was 0.194. The hazard index of Cr for children were 0.633~1.37 and 1.02~1.40 for adult, indicating it might pose non-carcinogenic risk to children and adults. The highest hazard index values of Ni、Cu、Zn、Cd、As、Hg for children and adults were：4.66×10-1、1.58×10-2、1.15×10-2、9.40×10-1、4.83×10-1、1.91×10-2, with the HI order as Cr>Tl>Cd>As>Ni>Cu>Zn>Hg. Our results indicated that Tl and Cr exist health risk in this study area. |
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