School of Environment, Key Laboratory for Yellow River and Huai River Water Environment and Pollution Control, Ministry of Education, Henan Key Laboratory for Environmental Pollution Control, Henan Normal University, Xinxiang, 453007, Henan, People's Republic of China.
College of Environmental Sciences and Engineering, Ministry of Education Key Laboratory of Pollution Processes and Environmental Criteria, Tianjin Key Laboratory of Environmental Remediation and Pollution Control, Nankai University, Tianjin, 300071, People's Republic of China.
Environ Sci Pollut Res Int. 2017 Aug;24(22):18195-18203. doi: 10.1007/s11356-017-9473-8. Epub 2017 Jun 20.
In order to investigate the distribution, transfer, and human health risks of polycyclic aromatic hydrocarbons (PAHs) in the soil-wheat systems, soil samples from 20 farmlands and corresponding wheat tissues were collected from selected regions of Henan Province in June 2013 and were analyzed to estimate the concentration of PAHs. The total concentrations of 15 PAHs (∑ PAHs) in soils from Henan Province varied from 6.91 to 72.4 ng/g. Moreover, two-ring to three-ring PAHs (1.59-29.1 ng/g) were the major species in soils, occupying 56.2% of total PAHs. Principal component analysis (PCA)-multiple linear regression (MLR) revealed that fossil fuel burning dominated the input of PAHs in agricultural soils of Henan Province. The range of ∑ PAHs concentrations in wheat tissues was 13.9-50.9 ng/g, which decreased along the root-straw-grain. Positive correlation among PAHs of soil and wheat tissues showed that PAHs in wheat mainly came from soil and then migrated along root-straw-grain. Moreover, PAHs were accumulated highest in root and lowest in grain. Two-ring to three-ring PAHs were easier to transfer from soil to wheat than five-ring to six-ring PAHs. Consumption of wheat grain created potential risk of cancer in Henan Province.
为了研究多环芳烃（PAHs）在土壤-小麦系统中的分布、迁移和对人类健康的风险，本研究于 2013 年 6 月从河南省选定地区的 20 个农田采集土壤样本和相应的小麦组织进行分析，以估计 PAHs 的浓度。河南省土壤中 15 种多环芳烃（∑PAHs）的总浓度范围为 6.91-72.4ng/g。此外，双环至三环 PAHs（1.59-29.1ng/g）是土壤中的主要物种，占总 PAHs 的 56.2%。主成分分析（PCA）-多元线性回归（MLR）表明，河南省农业土壤中 PAHs 的输入主要来自化石燃料燃烧。小麦组织中∑PAHs 浓度的范围为 13.9-50.9ng/g，沿根-茎-粒的顺序递减。土壤和小麦组织中 PAHs 的正相关表明，小麦中的 PAHs 主要来自土壤，然后沿根-茎-粒迁移。此外，PAHs 在根部积累最高，在籽粒中积累最低。双环至三环 PAHs 比五环至六环 PAHs 更容易从土壤转移到小麦中。食用小麦籽粒会给河南省带来癌症风险。
