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

作　　者：Yuting Lu Haolei Han Yuexing Yi Yunfeng Chai ChenWang Xiangchun Zhang Xiangde Yang Hongping Chen 

机构地区：[1]Tea Research Institute,Chinese Academy of Agricultural Sciences,Hangzhou 310008,China [2]Graduate School of Chinese Academy of Agricultural Sciences,Beijing 100081,China [3]School of Chemical Engineering and Materials,Zhejiang University of Technology,Hangzhou 310008,China [4]Key Laboratory of Tea Quality and Safety&Risk Assessment,Ministry of Agriculture,Hangzhou 310008,China [5]Key Laboratory of Tea Quality and Safety Control,Ministry of Agriculture and Rural Affairs,Hangzhou 310000,China

出　　处：《Journal of Environmental Sciences》2025年第2期350-363,共14页环境科学学报(英文版)

基　　金：supported by the earmarked fund for the Modern Agro-Industry Technology Research System (No.CARS-19);the Innovative Research Team in Chinese Academy of Agricultural Sciences (No.CAAS ASTIP-2014-TRICAAS).

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 5.9μg/g and 1.7 to 2.8μg/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.

关 键 词：Pyrrolizidine alkaloids Sorption-desorption behavior Tea plantation system Acidic soil Linear regression model 

分 类 号：S15[农业科学—土壤学]