Search Results - paul+westerhoff

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Nano-Sized Boron-Doped Diamond-Enabled Electrodes for Water Treatment and Chemical Sensing
Background Electrochemical sensing is a compact process used to detect chemicals in aqueous solutions (e.g., water, bodily fluids, foods). It can also be used to treat pollutants in drinking and industrial wastewaters. Electrochemical oxidation can generate hydroxyl radicals, which are effective in degrading organic contaminants in water, including...
Published: 9/16/2024   |   Inventor(s): Paul Westerhoff, Sergi Garcia-Segura, Shahnawaz Sinha, Rishabh Bansal, Rafael Verduzco, Michael Wong
Keywords(s): Environmental
Category(s): Physical Science, Energy & Power, Advanced Materials/Nanotechnology, Semiconductors, Materials & Processes
Atmospheric Water Generation by a Hybridized Rotary Dessicant with Solar-Heated Evacuated Tubes
Background Water harvesting from ambient air to produce fresh water is an active area of research. Water moisture in the air is universally available, and the water extracted is essentially pure water. This makes this process ideal, particularly for communities with limited freshwater supplies. Atmospheric Water Generation (AWG) technology can produce...
Published: 5/10/2024   |   Inventor(s): Paul Westerhoff, Shahnawaz Sinha, Chao Zeng
Keywords(s):  
Category(s): Energy & Power, Physical Science, Advanced Materials/Nanotechnology, Applied Technologies, Environmental Remediation/Wastewater Treatment
High-Efficiency Photocatalytic H2O2 Production
Background Hydrogen peroxide (H2O2) is widely used for industrial synthesis of organic chemicals, advanced oxidation of drinking or wastewater, and surface disinfection of pathogens. Currently, ~95% of H2O2 production employs the energy- and chemical-intensive anthraquinone-oxidation process. Photocatalytic H2O2 production is an emerging alternative...
Published: 11/29/2023   |   Inventor(s): Yen-Jung Lai, Tzu-Heng WANG, Paul Westerhoff, Bruce Rittmann
Keywords(s):  
Category(s): Physical Science, Energy & Power, Environmental Remediation/Wastewater Treatment, Alternative Energy
Engineering Amorphous Titanium (Hydr)Oxides Incorporated into Point of Use Activated Carbon Block Filter for Simultaneous Removal of Metallic and Oxo-Anions Removal from Drinking Water
Background Arsenic is classified as a Class-A human carcinogen, and occurs widely in ground and surface waters across the globe. Long-term exposure to arsenic-contaminated water has been linked to skin, kidney, liver, and bladder cancers. In addition to arsenic, other metals (e.g., chromium, vanadium, tungsten, selenium, manganese, lead) commonly co-occur...
Published: 5/31/2024   |   Inventor(s): Paul Westerhoff, Alireza Farsad, Kiril Hristovski, Shahnawaz Sinha
Keywords(s): Environmental
Category(s): Advanced Materials/Nanotechnology, Environmental Remediation/Wastewater Treatment, Physical Science, Environmental
Side-Emitting Optical Fibers as the Next-Generation Reverse Osmosis Membrane Spacer to Mitigate Biofouling
Background In desalination and wastewater reuse applications, biofouling of membrane surfaces can contribute to increased operational challenges and higher costs. Ultraviolet (UV) light has been shown to control biofilms while reducing chemical usage and disinfection by-products, but in spiral or complex geometries, delivering sufficient light to the...
Published: 6/5/2023   |   Inventor(s): Paul Westerhoff, Hojung Rho
Keywords(s):  
Category(s): Environmental Remediation/Wastewater Treatment, Energy & Power, Physical Science, Advanced Materials/Nanotechnology, Bioanalytical Assays, Chemistries & Devices
Portable Photoelectrocatalytic Device for Water Disinfection
­Bacteria, viruses, and other harmful microorganisms pose a significant pathogenic health-related risk to safe drinking water. Disinfection by chlorination is commonly practiced, however, chlorine is a toxic chemical that typically requires careful storage and proper handling. While ultraviolet (UV) disinfection can be effective, UV-based processes...
Published: 4/27/2023   |   Inventor(s): Paul Westerhoff, Francois Perreault, Sergio Garcia-Segura, Shahnawaz Sinha, Ana Barrios, Renato Montenegro Ayo
Keywords(s): Environmental, Water, Water Purification
Category(s): Physical Science, Environmental Remediation/Wastewater Treatment, Manufacturing/Construction/Mechanical, Environmental, Semiconductors, Materials & Processes
UV-C Wavelength Side-Emitting Optical Fibers Enabled by Surface Texturing
­Background Although chlorine remains one of the most widely used water disinfectants throughout the world, the toxicity of the chemical itself and of its by-products poses significant health risks. Non-chemical disinfectants such as ultraviolet (UV) irradiation has been an attractive alternative and is gaining acceptance in both large-scale and...
Published: 2/23/2023   |   Inventor(s): Paul Westerhoff, Zhe Zhao, Nora Shapiro
Keywords(s):  
Category(s): COVID-19, Coronavirus, SARS-CoV-2, Physical Science, Manufacturing/Construction/Mechanical, Environmental Remediation/Wastewater Treatment
Through silicon vias (TSV)
Through silicon vias (TSV) is a key enabling element the provides short vertical interconnects in die stacks to improve electrical performance, power consumption, and form factor for 3D integrated devices. The mismatch of thermal expansion coefficients between the copper via and the silicon wafer can induce significant thermal stresses to degrade the...
Published: 12/8/2023   |   Inventor(s): Paul Ho, Tengfei Jiang
Keywords(s):  
Category(s): Physical sciences > Semiconductor
Method to Quantify Nanobubble Reactivity in Water
Background Nanobubbles are an emerging water treatment technology that can find application in bodies of water, groundwater, treatment plants, pipelines, medical facilities, industrial cooling towers, and many others. Their generation can be achieved through several methods including, ejector, venturi, cavitation, and mixing. With sizes ranging from...
Published: 2/23/2023   |   Inventor(s): Paul Westerhoff, Shahnawaz Sinha, Yuqiang Bi
Keywords(s):  
Category(s): Environmental, Environmental Remediation/Wastewater Treatment, Physical Science, Chemical/Biological Sensors, Advanced Materials/Nanotechnology
Photoresponsive Polymer-Coated Optical Fibers for Chemical-Free Water Treatment
Background In recent years, photoresponsive polymers have been considered for many applications from drug delivery to environmental sensors. Photons of light actuate the structure of these folded polymers, providing a means to control their opening and closing. Although various other types of stimuli can be used to activate polymers—including...
Published: 2/23/2023   |   Inventor(s): Paul Westerhoff, Shahnawaz Sinha, Juan Noveron
Keywords(s): Environmental
Category(s): Advanced Materials/Nanotechnology, Environmental Remediation/Wastewater Treatment, Physical Science
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