This special collection aims to explore the integration of engineered nanomaterials with geochemical processes to address the growing environmental challenges posed by anthropogenic contaminants. It will cover a broad range of topics, including but not limited to:

• Mechanistic Studies: Research on how engineered nanomaterials interact with pollutants like toxic trace metals, pharmaceuticals, microplastics, and other contaminants in complex environmental matrices.

• Functionalized Nanomaterials: Contributions exploring the design and application of functionalized nanomaterials for targeted pollutant capture, transformation, and immobilization in contaminated environment.

• Biogeochemical Interactions: Studies examining the role of nanomaterials in enhancing biogeochemical processes, such as natural attenuation, nutrient cycling, and soil and water quality improvement.

• In Situ Monitoring Techniques: Research on emerging methodologies for real-time monitoring of contaminant transformation, nanoparticle interactions, and the efficacy of nano-enabled remediation technologies across diverse environmental matrices.

• Case Studies and Applications: Practical examples showcasing the successful application of nano-geochemical interfaces in different ecosystems, demonstrating their potential for effective pollution mitigation and enhancing environmental health.

By covering these themes, this special collection will provide a comprehensive overview of the latest advancements in nano-geochemical interfaces, facilitating knowledge exchange and collaboration among researchers and contributing to the development of sustainable solutions for global environmental challenges.

Marine environments are increasingly affected by a combination of natural and anthropogenic stressors, leading to changes in seawater quality that can have direct and indirect impacts on both environmental and human health. Contaminants such as bioaccumulative toxins, marine litter, and emerging chemical pollutants can enter marine food webs, affect biodiversity, and ultimately pose risks to human populations dependent on marine resources.

This Special Issue aims to provide new insights into the complex pathways through which multi-stressor marine environments influence environmental and human health, contributing to a more holistic understanding needed for effective management and policy actions. It will gather research that investigates the interactions between multiple stressors in marine environments and their consequences for ecosystem and human health. It will include contributions on climate related parameters, bio-essential and toxic elements, litter, organic pollutants, biodiversity, radioactivity, frugal monitoring technologies, and citizen science approaches to environmental health surveillance. Emphasis will be placed on interdisciplinary studies that link marine environmental quality indicators to potential health outcomes, risk assessment, stakeholder engagement, and policy recommendations.