Scenary

Research

Research Interest

  • Sustainable water and wastewater treatment and management
  • Development of assessing and predicting tools for water treatment technologies
  • Innovative water and wastewater treatment technologies for energy saving and harvesting
  • Systematic and integrated understanding of water and wastewater reuse
  • Application of computational chemistry and molecular modeling

Overall Picture of Research

Dr. Minakata's group aims to develop and manage sustainable technologies for water and wastewater treatment and energy harvesting. By 2050, 70% of the global population is expected to live in a city. Global urbanization will continue, and this will require many countries including the U.S. to reinvest/redesign infrastructure systems towards sustainable urban development. The sustainable development seeks to 1) reduce environment impacts and 2) improve impacts to human health. When we look at water infrastructure systems in the U.S., approximately 4% of total electricity consumption is for the water and wastewater treatment sector. However, a water-energy nexus indicates that there are significant contributions of consumptions of water and energy and environmental impacts from other sectors. As we increase de facto and planned water reuse, there will be critical needs that will include: 1) sustainable technology development for water and wastewater treatment and energy harvesting and 2) management of water and energy by considering both infrastructure systems and socio-economic environmental aspects.

  Sustainable water and wastewater treatment technology development and management

Three Major Areas of Research

  1. Development of assessing and predicting tools for water treatment technologies
  2. Innovative water/wastewater treatment technologies for energy saving and harvesting
  3. Systems approach and integrated understanding of water/wastewater reuse

Development of Assessing and Predicting Tools (Water reclamation, human health, and environmental ecology)

When we understand scientific fundamental principles of chemical physical phenomena in natural, biological, and engineered systems, comprehensive tools are useful to 1) design the systems, 2) evaluate and 3) predict their performances. Experimental observations coupled with theoretical evaluations enable us to develop those comprehensive tools. We will use the computational tools to predict a fate of various specifies in natural, biological and biomedical, and engineered systems.

Coupling Experimental and Theoretical Molecular-Level Investigations to Visualize the Fate of Degradation of Organic Compounds in Aqueous Phase Advanced Oxidation Systems

The lack of a holistic management plan combined with uncertainty about the adverse human health and ecological impacts of trace amounts of known and emerging organic compounds have raised public concerns about water. These issues also present major challenges to next generation water treatment utilities dealing with de facto and planned wastewater reuse. Advanced oxidation processes that produce highly reactive hydroxyl radicals are promising technologies to control trace amounts of organic compounds. Although the initial fate of hydroxyl radical induced reactions with diverse organic compounds have been studied, the mechanisms that produce intermediate-radicals and stable-byproducts are not well understood. Significant barriers remain in our understanding of complex multi-channel elementary reaction pathways embedded in peroxyl radical bimolecular decay that produce identical intermediate-radicals and stable-byproducts.

Known and Proposed General Reaction Pathways in AOPs

Known and Proposed General Reaction Pathways in AOPs g

Elementary Reaction Pathways for Reaction of HO* with Generic Form of RCH3

Elementary Reaction Pathways for Reaction of HO* with Generic Form of RCH3

Innovative Water/Wastewater Treatment Technologies for Energy Saving
and Harvesting

  1. Advanced oxidation processes
  2. Self-sustained water/wastewater treatment technology for high strength industrial wastewater
  3. Integrated approach for water/wastewater treatment and hydrogen generation using catalysts
Innovative Water/Wastewater Treatment Technologies for Energy Saving <br>and Harvesting

Systems Approach and Integrated Understanding of Water/Wastewater Reuse

  1. Sustainable and resilient water/wastewater reuse
  2. Wastewater treatment technology development for direct potable use
  3. Interdisciplinary understanding of water/wastewater reuse for direct potable use
Systems Approach and Integrated Understanding of Water/Wastewater Reuse

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