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| Effects of radishes on the speciation and absorption of perfluorooctanoic acid in soil |
| Received:September 01, 2021 |
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| KeyWord:perfluorooctanoic acid;radish;soil;speciation;adsorption |
| Author Name | Affiliation | E-mail | | Lü Xueyan | School of Hydrology and Water Resources, Nanjing University of Information Science and Technology, Nanjing 210044, China | | | LI Zhengyu | Academy of Environmental Planning & Design, Co., Ltd., Nanjing University, Nanjing 210000, China | | | DU Wenchao | School of Environment, Nanjing Normal University, Nanjing 210023, China | | | GUO Hongyan | School of Environment, Nanjing University, Nanjing 210023, China | | | YU Zhiguo | School of Hydrology and Water Resources, Nanjing University of Information Science and Technology, Nanjing 210044, China | | | WU Jichun | School of Earth Sciences and Engineering, Nanjing University, Nanjing 210023, China | | | SUN Yuanyuan | School of Earth Sciences and Engineering, Nanjing University, Nanjing 210023, China | sunyy@nju.edu.cn |
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| Abstract: |
| To understand the effects of radishes on the speciation and absorption of perfluorooctanoic acid(PFOA) in soil, a radish with a strong root system was chosen as a representative plant to study the growth and PFOA uptake of the radish, as well as the changes to the fraction distribution of PFOA in the soil under different concentrations of PFOA exposure in potted experiments. The results showed that radish planting significantly changed the speciation of PFOA in the soil, and this effects varied according to concentration. Compared with unplanted soil, radish planting significantly increased the non-desorbing fraction(12%) and reduced the residual fraction(10.5%) of PFOA in soil at low-PFOA exposure(0.2 mg·kg-1), but remarkably reduced the desorbing fraction(4.9%) of PFOA in soil at high-PFOA exposure(5 mg·kg-1). Radishes could uptake PFOA from the soil, and the concentrations of PFOA in the above ground part of the plant (stem and leaf) were significantly higher than those below ground. Low-PFOA exposure(0.2 mg·kg-1) caused a decrease in radish biomass, while high-PFOA exposure(5 mg·kg-1) had no significant effect on radish biomass. The results suggest that radish planting can change the fraction distribution of PFOA in the soil, and then influence its potential risks to human health and the environment. |
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