Colloids and Interfaces in Environmental Systems
Understanding the transformation, fate, and transport of emerging contaminants at environmental interfaces is central to predicting their risks and informing effective remediation approaches. Our group investigates how natural colloids, mineral surfaces, and engineered nanoparticles interact with contaminants, such as PFAS and nanooplastics, in aquatic environments. By combining advanced characterization tools with mechanistic modeling, we aim to reveal interfacial processes that dictate contaminant mobility and persistence.
Membrane Processes for Water Treatment
Membrane separation technologies offer energy-efficient solutions for removing contaminants from water. Our research examines the mechanisms of contaminant–membrane interactions, including electrostatic and hydrophobic effects, to improve separation performance and reduce fouling. We are particularly interested in developing next-generation membranes with tailored interfacial properties for the selective removal of persistent organic pollutants and ions.
Green and Sustainable Remediation Strategies
To address large-scale contamination, our group integrates microbe–mineral composites and environmentally benign nanomaterials into novel in situ remediation approaches. We seek to design systems that harness both abiotic and biotic processes to degrade or immobilize contaminants in soils and groundwater. These strategies emphasize scalability, cost-effectiveness, and alignment with sustainable development goals.
The Cao Lab in Environmental Chemistry 