Uptake of polycyclic aromatic hydrocarbons (PAHs) from PAH–contaminated soils to carrots and Chinese cabbages under the greenhouse and field conditions

被引：4
作者：
Cao C. [1 ,2 ]
Wu Y.-Y. [1 ,2 ]
Lv Z.-Y. [3 ,4 ]
Wang J.-W. [1 ,2 ]
Wang C.-W. [1 ,2 ]
Zhang H. [5 ]
Wang J.-J. [6 ,7 ]
Chen H. [8 ]
机构：
[1] College of Geography and Environmental Science, Northwest Normal University, Gansu, Lanzhou
[2] Key Laboratory of Resource Environment and Sustainable Development of Oasis, Gansu, Lanzhou
[3] Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou
[4] University of Chinese Academy of Sciences, Beijing
[5] College of Resources and Environment, Chengdu University of Information Technology, Chengdu
[6] Guangdong Provincial Key Laboratory of Soil and Groundwater Pollution Control, School of Environmental Science and Engineering, Southern University of Science and Technology, Shenzhen
[7] State Environmental Protection Key Laboratory of Integrated Surface Water-Groundwater Pollution Control, School of Environmental Science and Engineering, Southern University of Science and Technology, Shenzhen
[8] Department of Environmental Engineering and Earth Science, Clemson University, 29634, SC
来源：
Chemosphere | 2024年 / 360卷
关键词：
Bioconcentration factor; Health risks; PAHs; Translocation factor; Vegetables;
D O I：
10.1016/j.chemosphere.2024.142405
中图分类号：
学科分类号：
摘要：
Polycyclic aromatic hydrocarbons (PAHs) with the properties of structural stability, semi–volatility, and hydrophobicity are toxic and persistent in environments; thus, their transport and fate in agroecosystems is essential for reducing PAH accumulation in the edible parts of crops. Here, we cultivated cabbages (Brassica pekinensis L.) and carrots (Daucus carota L.) in PAH–contaminated soils under the greenhouse and field conditions. After harvesting, we observed a 9.5–46% reduction in soil ∑PAH concentrations. There were 37% of bioconcentration factors (BCFbs) > 1 and 93% of translocation factors (TFab) > 1, while low–molecular–weight (LMW) PAHs had higher BCFbs than high–molecular–weight (HMW) PAHs. The PAH concentrations showed significant and positive correlations among soils, the belowground parts, and the aboveground parts. The toxicity equivalent concentration (TEQBaP) followed the order of cabbage (greenhouse) > cabbage (field) > carrot (greenhouse) > carrot (field), suggesting potentially higher health risks in cabbage relative to carrot and vegetables under the greenhouse relative to field condition. Our study suggested growing carrots under field conditions as a management strategy for reducing the risks of vegetables grown in PAH–contaminated soils. © 2024 Elsevier Ltd
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