A5094136278- Ammonia Synthesis and Nitrogen Reduction
- Wastewater Treatment and Nitrogen Removal
- Adsorption and biosorption for pollutant removal
- Phosphorus and nutrient management
- Microbial Fuel Cells and Bioremediation
- Hydrogen Storage and Materials
- Constructed Wetlands for Wastewater Treatment
- Membrane-based Ion Separation Techniques
- Layered Double Hydroxides Synthesis and Applications
Stanford University
2024-2025
ConspectusHuman interference in natural biogeochemical cycles has caused an unprecedented input of reactive phosphorus and nitrogen nutrients into the environment, contributing to perturbations aqueous ecosystems (e.g., eutrophication). Furthermore, industrial mining Haber–Bosch ammonia production contribute significantly global energy expenditures greenhouse gas emissions. Existing wastewater treatment techniques, particularly those based on adsorption processes, have predominantly...
Ion exchange shows promise for recovering phosphate from wastewater as value-added products, but requires high selectivity to compete with conventional treatment. Hybrid anion (HAIX) resins, which contain non-selective basic functional groups and selective iron oxide nanoparticles (FeOnp), can effectively remove wastewater. However, knowledge gaps remain regarding the mechanisms of influence competing ions, hindering needed efforts model adsorption dynamics design scalable processes varying...
Ammonia-selective adsorbents can manage reactive nitrogen in the environment and promote a circular nutrient economy. Weak acid cation exchangers loaded with zinc exhibit high ammonia selectivity but face two implementation barriers: stability of zinc-carboxylate bond complex wastewaters energy- logistics-intensive adsorbent regeneration acidic solutions. In this study, we examined varying solutions (pure ammonium solution, synthetic urine, real urine) during electro-assisted regeneration....
Recovering nitrogen (N) from wastewater is a potential avenue to reduce reliance on energy-intensive synthetic fixation via Haber-Bosch and subsequent treatment of N-laden wastewaters through nitrification-denitrification. However, many technical economic factors hinder widespread application N recovery, particularly low concentrations in municipal wastewater, paucity high-efficiency separations technologies compatible with biological treatment, suitable products markets for recovered N. In...