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A critical review of co-pollution of microplastics and heavy metals in agricultural soil environments
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This review examines how microplastics and heavy metals frequently occur together in agricultural soil, where they interact in ways that can increase the toxicity of both. These co-contaminants can harm soil organisms, reduce crop productivity, and potentially enter the human food chain, making their combined presence in farmland a growing concern for food safety and health.
The soil environment is a primary destination for contaminants such as microplastics (MPs) and heavy metals (HMs), which are frequently detected simultaneously. The long-term coexistence of MPs and HMs in the soil necessitates unavoidable interactions, affecting their environmental chemical behavior and bioavailability. These co-contaminants pose potential threats to soil organism growth and reproduction, crop productivity, food security, and may jeopardize human health via the food chain. This paper summarizes the sources and trends of MPs in the soil environment, along with the mechanisms and current research status of MP adsorption or desorption of HMs. Additionally, this paper reviews factors affecting HM adsorption on MPs, including MP properties, HM chemical properties, and other environmental factors. Lastly, the effects of MPs and HMs on soil ecology and human health are summarized. The interaction mechanisms and potential biological effects of their co-contamination require further exploration. Future research should delve deeper into the ecotoxic effects of MP-HM co-contamination at cellular and molecular levels, to provide a comprehensive reference for understanding the environmental behavior of their co-contamination in soil.
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This review examines microplastics as emerging soil contaminants, focusing on their interactions with co-occurring pollutants such as heavy metals, pesticides, and antibiotics, and assessing the compound toxic risks these combinations pose to agricultural ecosystems and food safety.
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This review examines how microplastics and heavy metals like lead, cadmium, and arsenic interact in soil, often creating combined toxic effects on plants that differ from either pollutant alone. These interactions are relevant to human health because contaminated crops can transfer both microplastics and heavy metals to people through the food supply.
Effects of combined microplastics and heavy metals pollution on terrestrial plants and rhizosphere environment: A review
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This review summarizes how microplastics and heavy metals interact in soil to affect plant growth and the surrounding ecosystem. When present together, these pollutants cause significantly more harm than either alone, reducing plant weight by up to 87.5% and altering how heavy metals accumulate in crops -- raising concerns about food safety and human exposure through contaminated agricultural products.
Toxicological complexity of microplastics in terrestrial ecosystems
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This review summarizes how microplastics interact with other pollutants like heavy metals and pesticides in soil, creating combined toxic effects that threaten ecosystems and agriculture. The paper highlights that microplastics can change soil structure and disrupt the communities of microorganisms that keep soil healthy, with ripple effects on crop yields and food security.
Coupled effects of microplastics and heavy metals on plants: Uptake, bioaccumulation, and environmental health perspectives
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This review examines how microplastics and heavy metals work together to harm plants when both are present in soil. Microplastics can absorb heavy metals like lead, cadmium, and arsenic, and when plants take up these contaminated particles, the combined toxic effect is worse than either pollutant alone. This is concerning for human health because crops grown in contaminated soil could carry both microplastics and concentrated heavy metals into the food supply.
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