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| Migration and transformation dynamics of emerging contaminants in aquatic-terrestrial food chains |
| Received:February 18, 2025 |
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| KeyWord:emerging contaminants;water and soil food chain;accumulation and excretion;migration mechanism |
| Author Name | Affiliation | E-mail | | LI Xitong | Institute of Organic Contaminant Control and Soil Remediation, Nanjing Agricultural University, Nanjing 210095, China | | | SHENG Youying | Institute of Organic Contaminant Control and Soil Remediation, Nanjing Agricultural University, Nanjing 210095, China | | | ZHANG Lingyu | Institute of Organic Contaminant Control and Soil Remediation, Nanjing Agricultural University, Nanjing 210095, China | | | XU Yanxing | Institute of Organic Contaminant Control and Soil Remediation, Nanjing Agricultural University, Nanjing 210095, China | | | HU Xiaojie | Institute of Organic Contaminant Control and Soil Remediation, Nanjing Agricultural University, Nanjing 210095, China | huxiaojie@njau.edu.cn |
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| Abstract: |
| Emerging contaminants in water and soil environments pose severe threats to ecological security and human health, with the food chain serving as a critical pathway mediating the risk spread. This paper provides a comprehensive summary and synthesis of recent research advancements concerning the migration behaviors and mechanisms of emerging contaminants within aquatic and terrestrial food chains. Specifically, the migration of microplastics, antibiotics, and persistent organic pollutants in aquatic systems exhibits notable differences. Microplastics show a bidirectional trend of accumulation and depletion within the food chain, driven by the dynamic balance between aquatic organisms′ absorption, selective feeding, and excretion processes. Antibiotics, by contrast, exhibit a gradual decline in concentration along trophic levels, largely due to stepwise enhancement of metabolic degradation. In contrast, highly hydrophobic persistent organic pollutants continuously accumulate within organisms through lipid partitioning, resulting in pronounced biomagnification. Lowlipid-soluble endocrine-disrupting chemicals accumulate in higher trophic levels by relying on protein binding, while highly lipid-soluble endocrine-disrupting chemicals undergo lipid-mediated biomagnification along the food chain. In terrestrial environments, the migration of antibiotic resistance genes is even more complex. Antibiotic resistance genes spread across species in the soil-vegetable-insect food chain through multiple pathways, including plant water uptake, animal feeding, and atmospheric deposition, further facilitated by horizontal gene transfer, thereby significantly elevating health risks. By analyzing the migration mechanisms of emerging contaminants, this review deepens our understanding of their ecological toxicological effects and provides a scientific basis for their control and management. |
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