Ocean acidification poses a critical threat to marine ecosystems and the communities that depend on them. This project investigates wastewater-based ocean alkalinity enhancement (OAE) as a scalable solution to mitigate acidification and sequester atmospheric CO₂. By integrating alkalinity-enhancing materials such as olivine, magnesium hydroxide, and recycled concrete into wastewater effluent streams, we will evaluate changes in alkalinity, pH, and dissolved inorganic carbon in coastal receiving waters. Pilot-scale experiments and field monitoring will generate empirical data on dissolution rates, carbon uptake, and ecological responses, while modeling will assess scalability, cost-effectiveness, and long-term impacts. This research advances fundamental understanding of engineered biogeochemical interventions and provides actionable insights for climate mitigation. Broader impacts include training students from underrepresented groups, fostering inclusive fieldwork practices, engaging coastal stakeholders, and circulate results through open-access publications and workshops.