| 萝卜对土壤中全氟辛酸赋存形态影响及吸收特征 |
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| 引用本文： | 吕雪艳,李政宇,杜文超,郭红岩,于志国,吴吉春,孙媛媛.萝卜对土壤中全氟辛酸赋存形态影响及吸收特征[J].农业环境科学学报,2022,41(3):464-471. |
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| 作者姓名： | 吕雪艳 李政宇 杜文超 郭红岩 于志国 吴吉春 孙媛媛 |
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| 作者单位： | 南京信息工程大学水文与水资源工程学院, 南京 210044;南京大学环境规划设计研究院集团股份公司, 南京 210000;南京师范大学环境学院, 南京 210023;南京大学环境学院, 南京 210023;南京大学地球科学与工程学院, 南京 210023 |
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| 基金项目： | 国家自然科学基金项目(42077109,42007114,42077116);江苏省自然科学基金青年基金项目(BK20200817) |
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| 摘 要： | 为探讨植物种植对土壤中全氟辛酸（Perfluorooctanoic acid，PFOA）赋存形态影响及吸收特征，以根系发达的萝卜为代表性植物，通过盆栽试验，探究了不同浓度PFOA污染土壤中萝卜的生长、对PFOA的吸收利用及土壤中PFOA形态分布的变化。结果表明：萝卜的种植会显著改变土壤中PFOA的赋存形态，且存在浓度差异。与无种植组相比，种植萝卜显著提高了低浓度土壤中的PFOA有机结合态比例（12%）、降低了残渣态比例（10.5%）；显著降低了高浓度土壤中PFOA的可脱附态比例（4.9%）。萝卜可从土壤中富集PFOA，且地上部（茎、叶）富集能力显著高于地下部。低浓度（0.2 mg·kg-1）PFOA暴露显著降低萝卜生物量，但高浓度（5 mg·kg-1）并未对生物量产生显著影响。研究表明，萝卜种植可以改变污染土壤中PFOA的形态分布，进而影响PFOA对人类健康及环境的潜在风险。
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| 关 键 词： | 全氟辛酸 萝卜 土壤 赋存形态 吸收 |
| 收稿时间： | 2021/9/1 0:00:00 |
Effects of radishes on the speciation and absorption of perfluorooctanoic acid in soil |
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| Institution: | School of Hydrology and Water Resources, Nanjing University of Information Science and Technology, Nanjing 210044, China;Academy of Environmental Planning & Design, Co., Ltd., Nanjing University, Nanjing 210000, China;School of Environment, Nanjing Normal University, Nanjing 210023, China;School of Environment, Nanjing University, Nanjing 210023, China;School of Earth Sciences and Engineering, Nanjing University, Nanjing 210023, China |
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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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| Keywords: | perfluorooctanoic acid radish soil speciation adsorption |
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