Journal
SCIENCE OF THE TOTAL ENVIRONMENT
Volume 618, Issue -, Pages 777-784Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.scitotenv.2017.08.174
Keywords
Polycyclic aromatic hydrocarbons; Residual level; Cereal; Gastrointestinal digestion model; Bioaccessibility
Categories
Funding
- National Natural Science Foundation of China [41571456]
- Program for Science & Technology Innovation Talents in Universities of Henan Province [14HASTIT048]
- Scientific Research Foundation for the Introduction of Talent, Northwest A&F University, China
Ask authors/readers for more resources
Polycyclic aromatic hydrocarbons (PAHs) contamination in atmospheric and soil was serious, which is mainly due to high level of emission of PAHs in China resulted from the predominating use of coal in energy consumption and continuous development of economy and society for years. However, the status of PAHs in winter wheat grains from the areas influenced by coal combustion in China was still not clear. During harvest season, the winter wheat grains were collected from agricultural fields surrounding coal-fired power plants located in Shaanxi and Henan Provinces. This study found that the mean concentrations of 15 priority PAHs ranged from 69.58 to 557.0 mu g kg(-1). Three-ring PAHs (acenaphthene, acenaphthylene, fluorene, phenanthrene and anthracene) were dominant in the grains, accounting for approximately 70-81% of the total PAHs. The bioaccessibility of low molecular weight (LMW, 2-3 ring) PAHs (51.1-52.8%), high molecular weight (HMW, 4-6 ring) PAHs (19.8-27.6%) and total PAHs (40.9-48.0%) in the intestinal condition was significantly (p < 0.001) higher than that (37.4-38.6%; 15.6-22.5%; 30.7-35.5%) in the gastric condition, respectively. Based on total PAHs, the values of incremental lifetime cancer risk (ILCR) for children, adolescents, adults and seniors were all higher than the baseline value (10(-6)) and some even fell in the range of 10(-5)-10(-4), which indicated that most grains from the areas affected by coal combustion possessed considerable cancer risk. The present study also indicated that the children were the age group most sensitive to PAHs contamination. The pilot research provided relevant information for the regulation of PAHs in the winter wheat grains and for the safety of the agro-products growing in the PAHs-contaminated areas. (C) 2017 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available