Preprints
Michael L. Machala, Xi Chen, Samantha P. Bunke, Gregory Forbes, Akarys Yegizbay, Jacques de Chalendar, Inês L. Azevedo, Sally Benson, William A. Tarpeh. Life cycle comparison of industrial-scale lithium-ion battery recycling and mining supply chains. ChemRxiv. 2023.
Keywords: Circular economy, critical materials, hydrometallurgy, life cycle assessment, pyrometallurgy, reductive calcination
Dean Miller, Matthew Liu, Kristen Abels, Anna Kogler, William A. Tarpeh. Engineering a molecular electrocatalytic system for energy-efficient ammonia production from wastewater nitrate. ChemRxiv. 2023.
Keywords: Nitrate reduction, electrocatalysis, homogenous catalysis, reactive separation
Jinyu Guo, Matthew Liu, Chloe Laguna, Dean Miller, Kindle Williams, Brandon Clark, Carolina Muñoz, Sarah Blair, Adam Nielander, Thomas Jaramillo, William Tarpeh Electrodialysis and Nitrate Reduction to Enable Distributed Ammonia Manufacturing from Wastewaters. ChemRxiv. 2024.
Keywords: Nitrate reduction, reaction engineering, reactive separation, sustainable ammonia production, wastewater refining
2024
Elizabeth R. Corson, Jinyu Guo, William A. Tarpeh. ATR–SEIRAS Method to Measure Interfacial pH during Electrocatalytic Nitrate Reduction on Cu. ChemRxiv. 2024.
Keywords: Interfacial pH, local pH, ATR-SEIRAS, nitrate reduction
Brandon Clark, Neha Sharma, Edward Apraku, Hang Dong, William A. Tarpeh. Ligand Exchange Adsorbents for Selective Phosphate and Total Ammonia Nitrogen Recovery from Wastewaters. Accounts of Materials Research. 2024
Keywords: Adsorption, ammonia, cations, organic polymers, phosphates
Xiaohan Shao, Yixuan Huang, Robert M. Wood, William A. Tarpeh. Electrochemical sulfate production from sulfide-containing wastewaters and integration with electrochemical nitrogen recovery Journal of Hazardous Materials. 2024
Keywords: Ammonia, circular economy, electrochemical oxidation, electrochemical stripping, nutrient recovery, wastewater treatment
Anna Kogler, Neha Sharma, Diana Tiburcio, Meili Gong, Dean Miller, Kindle Williams, Xi Chen, William A. Tarpeh. Long-term Robustness and Failure Mechanisms of Electrochemical Stripping for Wastewater Ammonia Recovery. ACS Environ. Au 2024.
Keywords: Nutrient recovery, circular economy, ammonia, urine treatment, wastewater treatment, waste valorization
2023
McKenna Farmer, Rashmi Rajasabhai, William Tarpeh, Keith Tyo, George Wells. Meta-omic profiling reveals ubiquity of genes encoding for the nitrogen-rich biopolymer cyanophycin in activated sludge microbiomes. Front. Microbiol. 2023.
Keywords: nitrogen recovery, microbial ecology, cyanophycin, activated sludge, phosphorus accumulating organisms
Lars Ostervold, Adam Smerigan, Matthew J. Liu, Leah R. Filardi, Fernando D. Vila, Jorge E. Perez-Aguilar, Jiyun Hong, William A. Tarpeh, Adam S. Hoffman, Lauren F. Greenlee, Ezra Lee Clark, Michael J. Janik, and Simon R. Bare. Cation Incorporation into Copper Oxide Lattice at Highly Oxidizing Potentials. ACS Appl. Matter. Interfaces. 2023.
Keywords: X-ray absorption, spectroscopy, copper, electrocatalysis, cations, XANES, EXAFS, cation incorporation, electrochemistry
Dean Miller, Kristen Abels, Jinyu Guo, Kindle Williams, Matthew Liu, William A. Tarpeh. Electrochemical wastewater refining: a vision for circular chemical manufacturing. JACS. 2023.
Keywords: Electrochemistry, reactive separations, wastewater, resource recovery, reaction microenvironment
Heng Dong, Xiaohan Shao, Shane Hancox, Sean McBeath, William A. Tarpeh, Michael Hoffman. Understanding the Catalytic Active Sites of Crystalline CoSbxOy for Electrochemical Chlorine Evolution. ACS Appl. Matter. Interfaces. 2023.
Keywords: Electrochemical oxidation, electrolysis, scanning electron microscopy, water treatment
Matthew J. Liu and William A. Tarpeh. Reports from the Frontier: Electrifying Chemical Transformations and Separations to Valorize Wastewater Nitrogen. The Electrochemical Society. 2023.
Valerie A. Niemann, Marten Huck, Hans-Georg Steinrück, Michael F. Toney, William A. Tarpeh, and Sharon E. Bone. X-ray Absorption Spectroscopy Reveals Mechanisms of Calcium and Silicon Fouling on Reverse Osmosis Membranes Used in Wastewater Reclamation. ACS ES&T Water. 2023.
Keywords: membrane fouling, calcium organic complexes, silica μ-XRF, μ-XANES
Jinyu Guo, Paige Brimley, Matthew Liu, Elizabeth Corson, Carolina Muñoz, Wilson A. Smith, William A. Tarpeh. Mass Transport Modifies the Interfacial Electrolyte to Influence Electrochemical Nitrate Reduction. ACS Sustainable Chem. Eng. 2023.
Keywords: diffusion-migration-reaction model, electrolyte effects, infrared absorption spectroscopy, reaction microenvironment, reactive nitrogen, sustainable ammonia manufacturing
Matthew J. Liu, Dean M. Miller, and William A. Tarpeh. Reactive Separation of Ammonia from Wastewater Nitrate via Molecular Electrocatalysis. ES&T Letters. 2023.
Keywords: ammonia synthesis, electrochemical engineering, electrochemical nitrate reduction, reactive nitrogen, resource recovery
V. A. Niemann, P. Benedek, J. Guo, Y. Xu, S. J. Blair, E. R. Corson, A. C. Nielander, T. F. Jaramillo, and W. A. Tarpeh. Co-designing Electrocatalytic Systems with Separations To Improve the Sustainability of Reactive Nitrogen Management. ACS Catal. 2023.
Keywords: Electrocatalysis, Impurities, Nitrogen, Redox reactions, Selectivity
William A. Tarpeh, Yan Du, Corey M. G. Carpenter, Enrique E. Rodriguez, Damian E. Helbling, Diana S. Aga, Nancy G. Love, and Krista R. Wigginton. A Unit Process Approach to Nontarget Screening of Organic Contaminants during Urine Treatment. ACS EST Eng. 2023.
Keywords: fertilizer production, mass spectrometry, nutrient recovery, pharmaceuticals, resource recovery
2022
Tarpeh, W.A., Clark, B.D., Nelson, K.L., Orner, K.D. (2023). Reimagining Excreta as a Resource: Recovering Nitrogen from Urine in Nairobi, Kenya. In: Madon, T., Gadgil, A.J., Anderson, R., Casaburi, L., Lee, K., Rezaee, A. (eds) Introduction to Development Engineering. Springer, Cham. https://doi.org/10.1007/978-3-030-86065-3_16
Hang Dong, Chloe Marie Laguna, Matthew J. Liu, Jinyu Guo, and William A. Tarpeh. Electrified Ion Exchange Enabled by Water Dissociation in Bipolar Membranes for Nitrogen Recovery from Source-Separated Urine, Environmental Science & Technology (2022)
Keywords: ion exchange regeneration, membrane stripping, resin conductivity, resin regenerability, water splitting, weak acid cation exchangers
Chungheon Shin, Aleksandra Szczuka, Matthew J. Liu, Lorelay Mendoza, Renjing Jiang, Sebastien H. Tilmans, William A. Tarpeh, William A. Mitch, and Craig S. Criddle. Recovery of Clean Water and Ammonia from Domestic Wastewater: Impacts on Embodied Energy and Greenhouse Gas Emissions, Environmental Science & Technology (2022).
Keywords: Domestic wastewater, resource recovery, embodied energy, greenhouse gas emissions, supply chains, water reuse, ammonia recovery
Matthew J. Liu, Jinyu Guo, Adam S. Hoffman, Joakim Halldin Stenlid, Michael T. Tang, Elizabeth R. Corson, Kevin H. Stone, Frank Abild-Pedersen, Simon R. Bare, William A. Tarpeh. Catalytic Performance and Near-Surface X‑ray Characterization of Titanium Hydride Electrodes for the Electrochemical Nitrate Reduction Reaction, Journal of the American Chemical Society (2022).
Keywords: Electrochemical nitrate reduction; Electrocatalysis; X-ray diffraction; X-ray absorption spectroscopy; Density functional theory.
Lorelay Mendoza Grijalva, Blake Brown, Amanda Cauble, and William A. Tarpeh. Diurnal Variability of SARS-CoV-2 RNA Concentrations in Hourly Grab Samples of Wastewater Influent during Low COVID-19 Incidence, ACS ES&T Water (2022).
Keywords: COVID-19, detection frequency, discrete sampling, sampling optimization, wastewater-based epidemiology
Brandon Clark, Genesis Gilles, William A. Tarpeh. Resin-Mediated pH Control of Metal-Loaded Ligand Exchangers for Selective Nitrogen Recovery from Wastewaters, ACS Applied Materials & Interfaces (2022).
Keywords: Zinc; Adsorption; Ligands; Organic polymers; Cations
Xiaohan Shao, Sydney R. Johnson, William A. Tarpeh. Quantifying and Characterizing Sulfide Oxidation to Inform Operation of Electrochemical Sulfur Recovery from Wastewater, ACS ES&T Engineering (2022).
Keywords: Fertilizer production; Nutrient recovery; Potable reuse; Resource recovery; Scanning electrochemical microscopy (SECM)
Enrique E. Rodriguez, William A. Tarpeh, Krista R. Wigginton and Nancy G. Love. Application of plasma for the removal of pharmaceuticals in synthetic urine, Environmental Science: Water Research & Technology (2022).
2021
Anand V. Lalwani, Hang Dong, Linchao Mu, Kelly Woo, Hunter A. Johnson, Max A. Holliday, Jinyu Guo, Debbie G. Senesky, William A. Tarpeh. Selective aqueous ammonia sensors using electrochemical stripping and capacitive detection, AIChE Journal (2021).
Keywords: Capacitive sensing; Electrochemical Stripping; Nitrogen Sensor; Selective Separation
Tin Le, Xi Chen, Hang Dong, William Tarpeh, Adelaida Perea-Cachero, Joaquín Coronas, Stephen M. Martin, Munirah Mohammad, Amir Razmjou, Amirsalar R. Esfahani, Negin Koutahzadeh, Peifu Cheng, Piran R. Kidambi, and Milad Rabbani Esfahani. An evolving insight into metal organic framework-functionalized membranes for water and wastewater treatment and resource recovery, Industrial & Engineering Chemistry Research (2021).
Anna Kogler, McKenna Farmer, Julia Simon, Sebastien Tilmans, George Wells, William A. Tarpeh. A systematic evaluation of emerging wastewater nutrient removal and recovery technologies to inform practice and advance resource efficiency, ACS ES&T Engineering (2021).
Keywords: Eutrophication; Nitrogen; Phosphorus; Resource Recovery; Technology Diffusion.
William A. Tarpeh, Xi Chen. Making wastewater obsolete: Selective separations to enable circular water treatment, Environmental Science and Ecotechnology (2021).
Keywords: Adsorption; Nitrogen; Resource Recovery; Electrochemistry; Sensors
Hang Dong, Ziyan Wu, Matthew J. Liu, William A. Tarpeh. The role of intraparticle diffusion path length during electro-assisted regeneration of ion exchange resins: Implications for selective adsorbent design and reverse osmosis pretreatment, Chemical Engineering Journal (2021).
Keywords: Hybrid ion exchange; Membrane scaling; Electrochemical water splitting; Ferric oxide nanoparticles; Phosphate recovery
2020
Hang Dong, Lingze Wei, William A. Tarpeh. Electro-assisted regeneration of pH-sensitive ion exchangers for sustainable phosphate removal and recovery, Water Research (2020).
Keywords: Electrochemical water splitting; Electrolysis; Hybrid ion exchanger; Nutrient removal; Nutrient recovery; Regeneration
Tristan D. Hasseler, Ashwin Ramachandran, William A. Tarpeh, Michael Stadermann, Juan G. Santiago. User-friendly tool for techno-economic analysis and design of capacitive deionization systems, Water Research (2020).
Keywords: Water desalination; Capacitive deionization; Process design tool; Variable flow; Electrode aging; Techno-economic analysis
Matthew J. Liu and William A. Tarpeh. A parametric study on the effect of acidity and pressure on electrochemical stripping of ammonia from wastewaters, 50th International Conference on Environmental Systems, Paper 148 (2020).
Keywords: Electrochemical separations; Fertilizer; Electrodialysis; Membrane distillation; Resource recovery
Brandon Clark, William A. Tarpeh. Selective recovery of ammonia nitrogen from wastewaters with transition metal‐loaded polymeric cation exchange adsorbents, Chemistry - A European Journal (2020).
Keywords: Circular economy; Ion exchange; Ligand design; Resource recovery; Waste valorization.
Linchao Mu, Yichong Wang, William A. Tarpeh. Validation and Mechanism of a Low-Cost Graphite Carbon Electrode for Electrochemical Brine Valorization, ACS Sustainable Chemistry & Engineering (2020).
Keywords: Brine treatment; Chloride adsorption; Desalination; Electrocatalysis; Electrodialysis; Electrochemical water-salt splitting; Resource recovery
Tahereh Jafary, Abdullah Al-Mamun, Halima Alhimali, Mahad Said Baawain, Sadik Rahman, William A. Tarpeh, Bipro Ranjan Dhar, Byung Hong Kim. Novel two-chamber tubular microbial desalination cell for bioelectricity production, wastewater treatment and desalination with a focus on self-generated pH control, Desalination (2020).
Keywords: Microbial desalination; Two-chamber MDC; pH imbalance; Internal resistance; Power recovery; Salt removal
Matthew J. Liu, Boon Siong Neo, William A. Tarpeh. Building an operational framework for selective nitrogen recovery via electrochemical stripping, Water Research (2020).
Keywords: Fertilizer; Electrodialysis; Membrane distillation; Mass transfer modeling; Resource recovery; Electrochemical separations.
2019
Sarah Carl, Krysta Waldrop, Peter Pintauro, Levi T. Thompson, and William A. Tarpeh. Selective Hydrogenation of Furfural in a Proton Exchange Membrane Reactor Using Hybrid Pd/Pd Black on Alumina, ChemElectroChem (2019).
Keywords: Electrocatalysts; Selective hydrogenation; Electrode material; Furfural; Biomass reduction
Christopher Hyun, Zachary Burt, Yoshika Crider, Kara L. Nelson, C.S. Sharada Prasad, Swati D.G. Rayasam, William A. Tarpeh, and Isha Ray. Sanitation for Low-Income Regions: A Cross-Disciplinary Review, Annual Review of Environment and Resources (2019).
Keywords: Sustainable development goals; Sanitation service chain; Human right to sanitation; Waste treatment and reuse; Health and sanitation; Gender and sanitation.
2018
Yalin Li, William A. Tarpeh, Kara L. Nelson, Timothy J. Strathmann. Quantitative evaluation of an integrated system for valorization of wastewater algae as bio-oil, fuel gas, and fertilizer products, Environmental Science & Technology (2018).
Keywords: Fossil fuels, Biomass, Catalysts, Fuels, Biofuels
William A. Tarpeh, Ileana Wald, Michael O. Omollo, Timothy Egan, Kara L. Nelson. Evaluating ion exchange for nitrogen recovery from urine in Nairobi, Kenya, Development Engineering (2018).
Keywords: Adsorption; Fertilizer; Nutrient recovery; Nitrogen; Sanitation; Urine
William A. Tarpeh, Ileana Wald, Maja Wiphrächtiger, Kara L. Nelson. Effects of operating parameters on ion exchange columns for nutrient recovery from urine, Environmental Science: Water Research and Technology (2018).
Keywords: Ion exchange; Nutrient recovery; Urine
William A. Tarpeh, James M. Barazesh, Tzahi Y. Cath, Kara L. Nelson. Electrochemical Stripping to Recover Nitrogen from Source-Separated Urine, Environmental Science & Technology (2018).
Keywords: Ammonia; Electrodes; Membranes; Nitrogen
2017
Olga Kavvada, William A. Tarpeh, Arpad Horvath, Kara L. Nelson. Life-Cycle Cost and Environmental Assessment of Decentralized Nitrogen Recovery Using Ion Exchange from Source-Separated Urine through Spatial Modeling, Environmental Science & Technology (2017).
Keywords: Nitrogen; Regeneration; Energy; Ion exchange
Mariana C. Chrispim, William A. Tarpeh, Delhi T. P. Salinas, Marcelo A. Nolasco. The sanitation and urban agriculture nexus: urine collection and application as fertilizer in São Paulo, Brazil, Journal of Water, Sanitation and Hygiene for Development (2017).
Keywords: Fertilizer; Nexus; Source separation; Urine
William A. Tarpeh, Kai M. Udert, Kara L. Nelson. Comparing ion exchange adsorbents for nitrogen recovery from source-separated urine, Environmental Science & Technology (2017).
Keywords: Adsorption; Nitrogen; Ion exchange; Cations