Insight into the effect of geographic location and intercropping on contamination characteristics and exposure risk of phthalate esters(PAEs)in tea plantation soils  

作　　者：Jie Li Shanjie Han Ruhang Xu Xuchen Zhang Junquan Liang Mengxin Wang Baoyu Han 

机构地区：[1]Zhejiang Provincial Key Laboratory of Biometrology and Inspection and Quarantine,College of Life Sciences,China Jiliang University,Hangzhou 310018,China [2]Hangzhou Tea&Chrysanthemum Technology,Co.,Ltd.,Hangzhou 310018,China

出　　处：《Journal of Integrative Agriculture》2024年第11期3896-3911,共16页农业科学学报（英文版）

基　　金：supported by the Zhejiang Provincial Key Research and Development Program,China(2020C02026);the National Natural Science Foundation of China(32072626 and 32001910);the Fundamental Research Funds for the Provincial Universities of Zhejiang,China(2021YW41);the Innovation and Entrepreneurship Training Program for College Students of China Jiliang University(2023-96)。

摘　　要：Phthalate esters(PAEs)are an emerging pollutant due to widespread distribution in environmental mediums that have attracted widespread attention over recent years.However,there is little information about tea plantation soil PAEs.A total of 270 soil samples collected from 45 tea plantations in the major high-quality tea-producing regions of Jiangsu,Zhejiang,and Anhui provinces in China were analyzed for seven PAEs.The detection frequency of PAEs in tea plantation soil was 100%.DBP,DEHP,and DiBP were the main congeners in tea plantation soil.The PAEs concentrations in the upper soil were significantly higher than those in the lower soil.The concentration of tea plantation soil PAEs in Jiangsu Province was significantly lower than those in Zhejiang and Anhui provinces.Intercropping with chestnuts can effectively reduce the contamination level of PAEs in tea plantation soil.Correlation analysis,redundancy analysis,partial correlation analysis,and structural equation modeling methods further confirmed the strong direct influence of factors such as chestnut–tea intercropping,temperature,and agricultural chemicals on the variation of PAEs in tea plantation soil.The health and ecological risk assessments indicated that non-carcinogenic risk was within a safe range and that there was a high carcinogenic risk via the dietary pathway,with DBP posing the highest ecological risk.

关 键 词：phthalate esters chestnut and tea INTERCROPPING driving factors spatial heterogeneity risk assessment 

分 类 号：X53[环境科学与工程—环境工程]