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| Potential risk assessment of polycyclic aromatic hydrocarbons in soils of Shenyang North New Area, China |
| Received:May 18, 2017 |
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| KeyWord:Shenyang North New Area;PAHs;ecological risk assessment;health risk assessment |
| Author Name | Affiliation | E-mail | | LI Jia-kang | Key Laboratory of Regional Environment and Eco-Remediation of Ministry of Education, Shenyang University, Shenyang 110044, China | | | SONG Xue-ying | Key Laboratory of Regional Environment and Eco-Remediation of Ministry of Education, Shenyang University, Shenyang 110044, China | songxy2046@163.com | | WEI Jian-bing | Key Laboratory of Regional Environment and Eco-Remediation of Ministry of Education, Shenyang University, Shenyang 110044, China | | | GUO Pan | Key Laboratory of Regional Environment and Eco-Remediation of Ministry of Education, Shenyang University, Shenyang 110044, China | | | LI Yu-shuang | Key Laboratory of Regional Environment and Eco-Remediation of Ministry of Education, Shenyang University, Shenyang 110044, China | |
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| Abstract: |
| Soil samples were collected from 0~20 cm depth (n=101) in 5 land use types in Shenyang North New Area (SNNA), Shenyang, China via a uniform grid layout method. Pollution characteristics, ecological risk, and the health risk of the 16 polycyclic aromatic hydrocarbons (PAHs) in soil listed by the Environmental Protection Agency of the United States were measured. Total concentration of the 16 PAHs (TPAHs) in soils of SNNA ranged from 123.7 μg·kg-1 to 932.5 μg·kg-1. Average concentrations of TPAHs in different land use types decreased in the order of urban green land > artificial forest land > community vegetable land > maize land > paddy land. The TPAHs in the green land was the highest, and was over 10 times the relative soil quality standard in the Netherlands. According to Nemerow's Pollution Index, 23.8% of the sampling sites were heavily contaminated with PAHs, and concentrations decreased significantly from south to north. Toxic equivalents of PAHs in SNNA ranged from 1.39 μg·kg-1 to 96.41 μg·kg-1, with a mean value of 17.96 (±6.59) μg·kg-1. Therefore, the overall potential ecological risk was low. PAHs in the soil of SNNA did not pose significant non-carcinogenic risks to children or adults by non-carcinogenic or carcinogenic risk assessments. Cancer risk models showed that the risk of carcinogenic PAHs in SNNA was <10-6, and ingestion had the highest carcinogenic risk for humans. Urban green land soils had the highest carcinogenic risk. This information is important to develop best management practices to reduce the influence of polluted soil on human health. |
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