Journal of Integrative Agriculture ›› 2024, Vol. 23 ›› Issue (11): 3896-3911.DOI: 10.1016/j.jia.2024.03.018

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地理位置和间作对茶园土壤中邻苯二甲酸酯(PAEs)污染特征和暴露风险的影响

  

  • 收稿日期:2023-10-23 接受日期:2024-01-08 出版日期:2024-11-20 发布日期:2024-10-10

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

Jie Li1*, Shanjie Han1, 2*, Ruhang Xu1, Xuchen Zhang1, Junquan Liang1, Mengxin Wang1#, Baoyu Han1#   

  1. 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

  • Received:2023-10-23 Accepted:2024-01-08 Online:2024-11-20 Published:2024-10-10
  • About author:#Correspondence Mengxin Wang, E-mail: wmx@cjlu.edu.cn; Baoyu Han, Mobile: +86-13588086214, E-mail: hanbaoyu@cjlu.edu.cn * These authors contributed equally to this study.
  • Supported by:
    This work was 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), the Team Scientific Special Commissioner Project of Zhejiang Provincial Department of Science and Technology, China (SY-1).

摘要:

邻苯二甲酸酯(PAEs)是一种新兴的污染物,广泛分布于环境介质中,近年来引起了广泛关注。然而,有关茶园土壤 PAEs 的信息却很少。本研究采集了中国江苏、浙江和安徽三省主要优质茶叶产区45个茶园的270份土壤样本,对7 种 PAEs 进行了分析。茶园土壤中 PAEs 的检出率为 100%。茶园土壤中DBP、DEHP 和 DiBP是其主要同系物。上层土壤中的 PAEs 浓度显著高于下层土壤。江苏省茶园土壤 PAEs 的浓度显著低于浙江省和安徽省。板栗间作可有效降低茶园土壤中 PAEs 的污染程度。通过相关分析、冗余分析、偏相关分析和结构方程模型,进一步证实了板栗间作、温度和农药等因素对茶园土壤中PAEs的变化有较强的直接影响。健康和生态风险评估结果表明,非致癌风险在安全范围内,而通过饮食途径的致癌风险较高,其中 DBP 的生态风险最高。

Abstract:

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. 

Key words: phthalate esters , chestnut and tea intercropping ,  driving factors ,  spatial heterogeneity ,  risk assessment