数字农科院2.0

Insight into the sorption and desorption pattern of pyrrolizidine alkaloids and their N-oxides in acidic tea ( Camellia sinensis ) plantation soils

文献类型： 外文期刊

作者： Lu, Yuting;Han, Haolei;Yi, Yuexing;Chai, Yunfeng;Wang, Chen;Zhang, Xiangchun;Yang, Xiangde;Chen, Hongping

作者机构：

关键词： Pyrrolizidine alkaloids;Sorption -desorption behavior;Tea plantation system;Acidic soil;Linear regression model

期刊名称： JOURNAL OF ENVIRONMENTAL SCIENCES

ISSN： 1001-0742

年卷期： 2025 年 148 卷

页码：

收录情况： SCIE（2025版） ; ; EI（2025版） ; ; CSCD（2025-2026年度） ; ; 科技核心（2024版）

摘要： Pyrrolizidine alkaloids (PAs) and their N-oxides (PANOs) are phytotoxins produced by various plant species and have been emerged as environmental pollutants. The sorption/desorption behaviors of PAs/PANOs in soil are crucial due to the horizontal transfer of these natural products from PA-producing plants to soil and subsequently absorbed by plant roots. This study firstly investigated the sorption/desorption behaviors of PAs/PANOs in tea plantation soils with distinct characteristics. Sorption amounts for seneciphylline (Sp) and seneciphylline-N-oxide (SpNO) in three acidic soils ranged from 2.9 to 5.9 pg/g and 1.7 to 2.8 pg/g, respectively. Desorption percentages for Sp and SpNO were from 22.2% to 30.5% and 36.1% to 43.9%. In the mixed PAs/PANOs systems, stronger sorption of PAs over PANOs was occurred in tested soils. Additionally, the Freundlich models more precisely described the sorption/desorption isotherms. Cation exchange capacity, sand content and total nitrogen were identified as major influencing factors by linear regression models. Overall, the soils exhibiting higher sorption capacities for compounds with greater hydrophobicity. PANOs were more likely to migrate within soils and be absorbed by tea plants. It contributes to the understanding of environmental fate of PAs/PANOs in tea plantations and provides basic data and clues for the development of PAs/PANOs reduction technology. (c) 2024 The Research Center for Eco-Environmental Sciences, Chinese Academy of

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