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Eco-Friendly Nanomaterials for Remediation of Microplastics and Heavy Metals in Wetland Ecosystems
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This review examines how eco-friendly nanomaterials, such as biochar composites and plant-derived nanoparticles, can be used to simultaneously remove microplastics and heavy metals from wetland ecosystems. Researchers found that these green materials show promising efficiency for co-remediation while remaining compatible with wetland organisms. The study emphasizes the need for more real-world field testing and recommends incorporating microplastic-heavy metal co-remediation strategies into environmental policy.
Microplastics (MPs) and heavy metals (HMs) are pervasive contaminants in wetland ecosystems, where their co-occurrence poses complex ecological and human health risks due to synergistic interactions. Traditional remediation strategies often target these pollutants separately, overlooking opportunities for integrated removal approaches. This review addresses the research gap by systematically synthesizing current knowledge on eco-friendly nanomaterials for simultaneous MP–HM remediation in wetlands, with a particular focus on sustainable, low-cost solutions suitable for resource-limited contexts. Following PRISMA guidelines, over 50 peer-reviewed studies were analyzed to assess nanomaterial types, physicochemical properties, contaminant removal mechanisms, and integration into wetland systems. Key findings reveal that bio-based and green-synthesized nanomaterials such as biochar composites, metal–organic frameworks, and plant-derived nanoparticles show promising efficiency in MP–HM co-remediation, while maintaining compatibility with wetland biota. Design considerations, operational challenges, and policy frameworks are critically discussed, alongside identified knowledge gaps, including limited field-scale validation and long-term ecological risk assessments. The review concludes with targeted recommendations for future research, emphasizing scalable nanomaterial development, optimized wetland-nanomaterial synergy, and inclusion of MP–HM co-remediation in environmental policy. This synthesis offers a unique, integrated perspective that bridges material science, wetland ecology, and environmental management to advance sustainable remediation strategies in the face of complex contaminant mixtures.
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This Chinese-language review summarized how constructed wetlands remove microplastics and nanoplastics through plant-substrate-microorganism interactions, covering removal mechanisms, ecological effects, and treatment efficiency. The authors found wetlands to be a cost-effective ecological approach but noted significant knowledge gaps on long-term nanoplastic behavior.
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