Informatics Publishing Limited

Yue Li ¹, Le Zhang ¹, Wei Hou ¹, Yuli Li ¹, Xiaojun Li ²

Affiliations
1 College of Environmental Science, Liaoning University, 66 Chongshan Middle Road, Huanggu District, Shenyang 110036, CN
2 Key Laboratory of Pollution Ecology and Environmental Engineering, Institute of Applied Ecology, Chinese Academy of Sciences, 72 Wenhua Street, Shenhe District, Shenyang 110016, CN

Abstract

As the "source" and "collector" of PAHs, surface dust in cities, cause invisible, potential and long-term destructions to ecosystems. PAHs content in the surface dust and distributions of functional areas in Shenyang city was discussed systematically. PAHs composition differences in different functional areas were analysed. It was concluded that parks and residential districts present the least PAHs pollution, while commercial districts and roads suffer the heaviest PAHs pollution. Different functional areas show similar composition of PAHs. Most PAHs are high-ring ones, accompanied with some low-ring PAHs. The content of high-ring PAHs is proportional to the number of rings or molecular weight. PAHs pollution and health risk in Shenyang city were evaluated through various methods. Results demonstrated that PAHs pollution in Shenyang city has reached a high level, which is threatening the local ecological environment and human health significantly.

Keywords

PAHs, Surface Dust, Health Risk Assessment.

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Wei Hou ¹, Le Zhang ¹, Xi-Ping Ma ¹, Xiao-Jun Li ², Ling-Xue Kong ³

Affiliations
1 College of Environmental Science, Liaoning University, Shenyang 110036, CN
2 Key Laboratory of Pollution Ecology and Environmental Engineering, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, CN
3 Institute for Frontier Materials, GTP Research, Deakin University, Geelong Waurn Ponds Campus, Locked Bag 20000, AU

Abstract

The effect of polycyclic aromatic hydrocarbon and highly effective degradation fungi Mucor mucedo (MU) was studied on corncob decomposition in Pyr-contaminated soil for 120 days to identify the impact of a degradable immobilized carrier on the remediation of soil contaminated by persistent organic pollutants. Results showed that the corncob was mainly composed of hemicelluloses, cellulose, and water dissolved (WD) material, which accounted for 85 percent of its total weight. MU addition significantly affected corncob decomposition. Thus, humic acid production and WD and benzene-ethanol dissolved material degradation increased. The peaking of the WD content was delayed for 30 days or more. The extractable pyrene content positively correlated with the WD content in the corncob during the decomposition. These results theoretically support a refined remediation principle of immobilized microorganisms.

Keywords

Decomposition, Mucor mucedo, Remediation, Pyrene.

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