Co-occurrence of multiple contaminants: Unentangling adsorption behaviour in agricultural soils

IF 7.6 2区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Environmental Pollution Pub Date : 2025-03-23 DOI:10.1016/j.envpol.2025.126118

Gaowei Tan , Darrell W.S. Tang , Vera Silva , Hongyu Mu , Shijie Qin , Osman Rima , Violette Geissen , Xiaomei Yang

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Abstract

The co-occurrence of pesticides, pharmaceuticals, and MPs has resulted in combined toxicity and high risks to ecosystems and human health. However, understanding on the interactions among co-occurring pollutants in soils remains limited. This study focused on adsorption behaviour of a pesticide mixture (chlorpyrifos (CPF), pendimethalin (PDM) and pyraclostrobin (PCS)) in three soils (sandy soil (S1), loamy soil (S2), and silt soil (S3)) to examine the absorption behaviour of pesticides in the presence of the pharmaceutical compound albendazole (ALB) and starch-based microplastics (MPs). The results showed that ALB significantly decreased (p < 0.05) the adsorption of CPF, PDM, and PCS by 29 %–41 % in S1. The adsorption of CPF (+20 %) and PCS (+101 %) in S2 were significantly enhanced but PDM (−22 %) adsorption was inhibited by ALB. ALB also significantly (p < 0.05) promoted CPF and PCS adsorption in S3 by 39 % and 120 %, respectively, but did not change PDM adsorption. In soil-MP matrices, ALB significantly reduced the adsorption of CPF (−25 %), PDM (−26 %), and PCS (−21 %) in the S1-MP matrix, but no significant change in the S2 and S3-MP matrices was observed. Moreover, MPs significantly (p < 0.05) increased the adsorption of the pesticide mixture by 120–730 %, but reduced ALB adsorption by 11–24 % in soils. Further, regardless of ALB presence, correlation analysis suggested that K_d of pesticides showed positive correlations (p < 0.01) to soil organic matter, specific surface area, and clay content in soil matrices without MP-contamination, while no significant positive correlation between K_d of pesticides and soil properties was observed in soil-MPs matrices. This study indicates that co-occurring pollutants could alter the adsorption behaviour of pesticides in soil and thereby affect their bioavailability and mobility in the soil ecosystem. Further study is urgently needed to assess the ecotoxicity of co-occurring multi-contaminants, as well as their potential transport to other environmental compartments.

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多种污染物的共存：农业土壤中的解缠吸附行为

农药、药物和MPs的共存导致了综合毒性和对生态系统和人类健康的高风险。然而，对土壤中共存污染物之间相互作用的了解仍然有限。本研究主要研究了农药混合物(chlorpyrifos （CPF), PDM （PDM）和pyraclostrobin (PCS)）在三种土壤（沙土（S1），壤土（S2）和粉土（S3））中的吸附行为，以研究药物化合物阿苯达唑（ALB）和淀粉基微塑料（MPs）存在下农药的吸附行为。结果表明，ALB显著降低(p<；0.05)对CPF、PDM和PCS的吸附率为29% ~ 41%。S2对CPF（+20%）和PCS（+101%）的吸附显著增强，而对PDM（-22%）的吸附被ALB抑制。ALB也显著(p<；0.05)对S3中CPF和PCS的吸附分别提高了39%和120%，但对PDM的吸附没有影响。在土壤- mp基质中，ALB显著降低了CPF（-25%）、PDM（-26%）和PCS（-21%）在S1-MP基质中的吸附，但对S2和S3-MP基质的吸附无显著变化。此外，MPs显著(p<；0.05)使混合农药在土壤中的吸附提高了120 ~ 730%，但使ALB在土壤中的吸附降低了11 ~ 24%。此外，无论ALB是否存在，相关分析表明，农药的Kd呈正相关(p<；0.01)对土壤有机质、比表面积和粘粒含量的影响显著，而在土壤- mps基质中，农药残留量Kd与土壤性质无显著正相关。该研究表明，污染物的共存会改变农药在土壤中的吸附行为，从而影响农药在土壤生态系统中的生物有效性和流动性。目前迫切需要进一步的研究来评估共存的多种污染物的生态毒性，以及它们向其他环境隔间的潜在运输。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Environmental Pollution 环境科学-环境科学

CiteScore

16.00

自引率

6.70%

发文量

2082

审稿时长

2.9 months

期刊介绍： Environmental Pollution is an international peer-reviewed journal that publishes high-quality research papers and review articles covering all aspects of environmental pollution and its impacts on ecosystems and human health. Subject areas include, but are not limited to: • Sources and occurrences of pollutants that are clearly defined and measured in environmental compartments, food and food-related items, and human bodies; • Interlinks between contaminant exposure and biological, ecological, and human health effects, including those of climate change; • Contaminants of emerging concerns (including but not limited to antibiotic resistant microorganisms or genes, microplastics/nanoplastics, electronic wastes, light, and noise) and/or their biological, ecological, or human health effects; • Laboratory and field studies on the remediation/mitigation of environmental pollution via new techniques and with clear links to biological, ecological, or human health effects; • Modeling of pollution processes, patterns, or trends that is of clear environmental and/or human health interest; • New techniques that measure and examine environmental occurrences, transport, behavior, and effects of pollutants within the environment or the laboratory, provided that they can be clearly used to address problems within regional or global environmental compartments.