Open Access. Powered by Scholars. Published by Universities.®
Physical Sciences and Mathematics Commons™
Open Access. Powered by Scholars. Published by Universities.®
- Keyword
-
- Internet of water (2)
- Public water data (2)
- Texas water (2)
- Water data management (2)
- Water education (2)
-
- Water management (2)
- Adsorption (1)
- Aquifer recharge zone (1)
- Best Management Practices (1)
- Best management practices (1)
- Carbon nanotubes (1)
- Carbon nanotubes; surface modification; heavy metals; adsorption; water and wastewater treatment (1)
- Chemical engineering (1)
- Chitosan (1)
- Chitosan encapsulation (1)
- Complex systems (1)
- Constructed wetlands (1)
- Contamination (1)
- Eavy metal contamination (1)
- Edward's Aquifer (1)
- Edwards aquifer (1)
- Emergency Responsers (1)
- Encapsulation H (1)
- Fabs (1)
- Ferrateᵛᶦ (1)
- Firefighting (1)
- First Responder Training (1)
- Green manufacturing (1)
- Hexavalent chromium (1)
- Industrial water use (1)
- Publication Year
- Publication
-
- Water Resources Science and Technology Faculty Publications (19)
- Water Resources Science and Technology Conference Papers and Abstracts (14)
- Water Resources Science and Technology Theses and Graduate Research Reports (7)
- Water Resources Science and Technology Book and E-Book Publications and Reports (6)
- Other Materials (2)
- Publication Type
Articles 1 - 30 of 49
Full-Text Articles in Physical Sciences and Mathematics
Bmp Training Instructional Aid For Protection Of Edwards Aquifer Water Quality From Firefighting Runoff, Walter Den, Mark Black
Bmp Training Instructional Aid For Protection Of Edwards Aquifer Water Quality From Firefighting Runoff, Walter Den, Mark Black
Other Materials
No abstract provided.
Targeting Macrophytes: Increased Water Quality Through Optimized Vegetation Considerations For Constructed Wetlands, Austin Mcbrady
Targeting Macrophytes: Increased Water Quality Through Optimized Vegetation Considerations For Constructed Wetlands, Austin Mcbrady
Masters Theses
This study of constructed wetland design investigated relationships between macrophyte species selection and planting density for water quality improvement. A lab-scale wetland was compared against a pilot-scale wetland in San Antonio, Texas at Mitchell Lake to measure differences in effluent water quality improvement using three native macrophyte species. Using a novel, two-phase method, a targeting macrophyte was identified from among other species based on its marked capability for improving water quality factors, then was planted in varied majority densities to compare differences in treatment effectiveness. The results of this study showed that this complimentary approach to wetland design displayed significant …
A Control Study Analysis Application Of Unoccupied Aerial Systems (Drones) To Monitor Eutrophication, Chrystal Mata
A Control Study Analysis Application Of Unoccupied Aerial Systems (Drones) To Monitor Eutrophication, Chrystal Mata
Water Resources Science and Technology Theses and Graduate Research Reports
Unmanned Aircraft systems (UAS) can offer a valuable perspective for detecting and monitoring for eutrophication in bodies of water by providing high-resolution images and data assignments for algal blooms and nutrient levels. Eutrophication, the process by which water bodies become enriched with nutrients, has emerged as a critical factor in evaluating and maintaining water quality. In this study, we use DJI Inspire Pro 1 equipped with a Zenmuse X3 camera, attached with a Parrot Sequoia multispectral sensor was used to in conjunction with algorithms to retrieve Chlorophyll parameters for monitoring eutrophication. Although water quality parameters such as pH, nitrate, phosphate, …
Trashed: A Review Of Anthropogenic Litter In An Urban Watershed, John D. Hamilton
Trashed: A Review Of Anthropogenic Litter In An Urban Watershed, John D. Hamilton
Water Resources Science and Technology Theses and Graduate Research Reports
Urban creeks, streams and rivers have become an unfortunate destination for trash pollution. Within an urban watershed trash pollution is harmful to fish, wildlife, public health, contributes to microplastic proliferation, and aesthetically tarnishes an otherwise unscathed ecosystem. With lots of attention focused on trash in marine and coastal ecosystems, this study aims to contribute to the growing research on inland urban watersheds and their involvement. This study highlights issues associated with trash pollution, and investigates the associated vectors, origins, behaviors, and contributing factors that create trash ladened urban watersheds. Datasets and site surveys from repeated trash cleanups in three creekside …
Risk Assessment Of Urban Development In The Recharge Zone Of The Karstic Edwards Aquifer: A Literature Survey And Analysis, Julie Ybarra
Risk Assessment Of Urban Development In The Recharge Zone Of The Karstic Edwards Aquifer: A Literature Survey And Analysis, Julie Ybarra
Water Resources Science and Technology Theses and Graduate Research Reports
The Edwards Aquifer is a unique groundwater system and provides drinking water for millions of people in Central Texas. Central Texas has seen an increase in urban development across this region and poses a threat to its water supply and water quality. A literature review and an analysis of existing risk assessment frameworks was conducted to gather information about the Edwards Aquifer and other karst aquifers around the world. The information gathered from the literature review and analysis assisted in the development of the Edwards Aquifer Vulnerability Interface. This tool identifies vulnerable areas in the Edwards Aquifer and can strengthen …
Dual Isotopic (O & N) Approach In The Assessment Of No3- Pollution In An Urban River, Abongwa T. Pride, Walter Den, Aarin Teague
Dual Isotopic (O & N) Approach In The Assessment Of No3- Pollution In An Urban River, Abongwa T. Pride, Walter Den, Aarin Teague
Water Resources Science and Technology Faculty Publications
Deterioration of urban waterways has become a major environmental concern as management and recreational goals are often hampered by poor water quality. The San Antonio River (TX, USA), whose upper reaches, including its headwaters, pass through a highly urbanized community, is vulnerable to pollution from a myriad of anthropogenic activities within its initial 17-km stretch. This investigation applied a dual-isotope approach to characterize water samples collected during the wet season (May–June, 2019) in order to assess the potential sources of nitrate in the urban stretch of river. The δ15N-NO3 and δ18O-NO3 values ranged from …
Aflatoxin In Dairy Cattle Water Troughs, Julie A. Scott
Aflatoxin In Dairy Cattle Water Troughs, Julie A. Scott
Water Resources Science and Technology Theses and Graduate Research Reports
One of the most commonly found mycotoxins, aflatoxin, has been an emerging concern for the milk and dairy industry and a continued concern for the human food supply and cattle feed industry. There is a possibility of this carcinogenic mycotoxin being found in water and several studies have found them in water storage tanks, treated wastewater systems, and even in bottled water. With the potential presence in water, this study explores the possibility of aflatoxin in water troughs found on dairy farms which could be one of the exposures to cattle linked to causing aflatoxin in milk. Trough water samples …
Rivers As International Borders: A Comparison Of How Social-Political Factors Have Impacted Natural Resources In The Usumacinta River Basin And Rio Grande River Basin Within The Context Of Climate Change, Anna A. Flores
Water Resources Science and Technology Theses and Graduate Research Reports
Along transboundary river borders in North and Central America social-political factors such as conservation, militarization, and migration impact natural resources leaving the United States, Mexico, and Guatemala at risk of ecological decline due to the changing climate. I present a qualitative case study comparing the social-political factors and their impact on natural resources in the Usumacinta River Basin (URB) and Rio Grande River Basin (RGRB). A comprehensive evaluation of social-political factors is performed starting from the 19th century to the current era. I contribute to the field of environmental sociology by extending Laako and Kauffer’s (2022) work on eco-frontiers of …
Adsorption-Based Atmospheric Water Harvesting: A Review Of Adsorbents And Systems, Muhammad Bilal, Muhammad Sultan, Tatiana Morosuk, Walter Den, Uzair Sajjad, Mian Ma Aslam, Muhammad W. Shahzad, Muhammad Farooq
Adsorption-Based Atmospheric Water Harvesting: A Review Of Adsorbents And Systems, Muhammad Bilal, Muhammad Sultan, Tatiana Morosuk, Walter Den, Uzair Sajjad, Mian Ma Aslam, Muhammad W. Shahzad, Muhammad Farooq
Water Resources Science and Technology Faculty Publications
Atmospheric water harvesting (AWH) has been an appealing prospect for decades to overcome water scarcity in remote areas. Adsorption-based AWH technologies have gained popularity due to their adaptability, and applicability using low-grade heat sources. This study presents up-to-date and future possibilities of adsorbents and systems for adsorption-based AWH. In this review, in-depth advancements in adsorbent materials are compartmentalized into adsorption equilibrium/isotherms, adsorption kinetics, and thermal conductivity. Various systems designs and modifications have been reviewed and classified accordingly. Liquid desiccants i.e., CaCl2 and LiCl-based AWH systems produced in between 0.63 to 1.0 kg/m/d of water. Recently, metal-organic frameworks …
Chemical And Carbon Isotopic Characterization Of A Karst-Dominated Urbanized Watershed: Case Of The Upper San Antonio River, Abongwa T. Pride, Walter Den, Aarin Teague
Chemical And Carbon Isotopic Characterization Of A Karst-Dominated Urbanized Watershed: Case Of The Upper San Antonio River, Abongwa T. Pride, Walter Den, Aarin Teague
Water Resources Science and Technology Faculty Publications
Urbanization and agriculture are two key factors that place demands on water resources and serve as sources of anthropogenic pollution into inland waterways. The San Antonio River, which is sourced from a karst aquifer, plays an important recreational and scenic role, yet effective management is often hampered by the lack of understanding of the chemical characterization of the water system. The karst-dominated Edwards Aquifer watershed in south-central Texas is an ideal watershed to understand water-rock interaction (carbonate dissolution) and anthropogenic impact on our water resources. In order to understand groundwater-surface water interactions, we made chemical and isotopic measurements over a …
Elucidating The Mass Transfer Mechanism Of Crvi Adsorption By Encapsulated Chitosan-Carbon Nanotubes-Iron Beads In Packed-Bed Columns, Mian Muhammad Ahson Aslam, Walter Den, Hsion-Wen Kuo
Elucidating The Mass Transfer Mechanism Of Crvi Adsorption By Encapsulated Chitosan-Carbon Nanotubes-Iron Beads In Packed-Bed Columns, Mian Muhammad Ahson Aslam, Walter Den, Hsion-Wen Kuo
Water Resources Science and Technology Faculty Publications
This study evaluates the CrVI breakthrough behaviors of a continuous-flow column packed with composite chitosan-MWCNTs‑iron beads under various operating conditions. Under the tested range of experimental parameters, a maximum of 54% of CrVI removal was achieved at: water flow rate, 1 mL/min, feed CrVI concentration, 30 mg/L; and packed bed height 8 cm. A homogeneous surface diffusion model (HSDM) involving convection-dispersion and diffusion equations was formulated, numerically solved, and experimentally validated. The high degree of conformity between the calculated and experimental breakthrough curves facilitated the determination of mass transfer parameters including axial dispersion DL, (1.30 …
Pfoa Loaded Gac Fall 2021 Report, Ramiro Nava
Pfoa Loaded Gac Fall 2021 Report, Ramiro Nava
Water Resources Science and Technology Theses and Graduate Research Reports
No abstract provided.
Evolution Of A Deep Fluid In A Surficial Environment Using Stable Isotopes Of Carbon And Sulfur: Case Of The Transitional Section Of The Edwards Aquifer, Abongwa T. Pride, Walter Den
Evolution Of A Deep Fluid In A Surficial Environment Using Stable Isotopes Of Carbon And Sulfur: Case Of The Transitional Section Of The Edwards Aquifer, Abongwa T. Pride, Walter Den
Water Resources Science and Technology Faculty Publications
The Edwards Aquifer in south central Texas (USA) features a distinct fault line defining the freshwater and saline water zones. We aim to elucidate the evolutionary behavior of carbon and sulfur emanating from deep environments and flowing in surficial environment so as to better understand the cycling of these metals in water environments. To characterize the evolution of carbon and sulfur species in surficial environment as the fluid emanates from a deep saline aquifer, we monitored the chemical and isotopic (δ13CDIC and δ34SSO4) parameters over a 700-m stretch on a streampond system situated on the saline-freshwater line of the Edwards …
Functionalized Carbon Nanotubes (Cnts) For Water And Wastewater Treatment: Preparation To Application, Mian Muhammad-Ahson Aslam, Hsion-Wen Kuo, Walter Den, Muhammad Usman, Muhammad Sultan, Hadeed Ashraf
Functionalized Carbon Nanotubes (Cnts) For Water And Wastewater Treatment: Preparation To Application, Mian Muhammad-Ahson Aslam, Hsion-Wen Kuo, Walter Den, Muhammad Usman, Muhammad Sultan, Hadeed Ashraf
Water Resources Science and Technology Faculty Publications
As the world human population and industrialization keep growing, the water availability issue has forced scientists, engineers, and legislators of water supply industries to better manage water resources. Pollutant removals from wastewaters are crucial to ensure qualities of available water resources (including natural water bodies or reclaimed waters). Diverse techniques have been developed to deal with water quality concerns. Carbon based nanomaterials, especially carbon nanotubes (CNTs) with their high specific surface area and associated adsorption sites, have drawn a special focus in environmental applications, especially water and wastewater treatment. This critical review summarizes recent developments and adsorption behaviors of CNTs …
Treatment Of Prodcued Water Using Ferrate (Vi) And Directional Solvent Extraction, Sean X. Thimons
Treatment Of Prodcued Water Using Ferrate (Vi) And Directional Solvent Extraction, Sean X. Thimons
Water Resources Science and Technology Theses and Graduate Research Reports
Oil field fracking operations creates by-product “produced water” that is highly variable in composition and difficult to treat. This study aims to examine two novel treatment processes together in improving the quality of a synthetic, hypersaline produced water, and examines if effluent would be suitable for reuse. Here, we examine the ability of ferrate (VI) to coagulate organic and inorganic compounds to reduce turbidity while the efficacy of diisopropylamine (DIPA) in water extraction from the subsequent hypersaline solutions was also assessed under a variety of temperature ranges. For the final product water that is separated and treated through both processes, …
Encapsulated Chitosan-Modified Magnetic Carbon Nanotubes For Aqueous-Phase Crvi Uptake, Mian Muhammad-Ahson Aslam, Walter Den, Hsion-Wen Kuo
Encapsulated Chitosan-Modified Magnetic Carbon Nanotubes For Aqueous-Phase Crvi Uptake, Mian Muhammad-Ahson Aslam, Walter Den, Hsion-Wen Kuo
Water Resources Science and Technology Faculty Publications
This work demonstrates the performance of a composite adsorbent encapsulated with chitosan (CS) and maghemite-doped multiwall carbon nanotubes (MWCNTs). Hexavalent chromium (CrVI) was used as the representative hazardous heavy metal to characterize the adsorption behavior of the composite beads. The chromium speciation chemistry combined with the chitosan surface chemistry rendered pH at 4 to be the optimized condition in which the uptake of CrVI was quantitatively most effective. The Langmuir isotherm with a maximum adsorption capacity of 119 mg g−1 at 298 K was observed. The CrVI adsorption studies using partial compositions of the beads …
Best Management Practices For Firefighting In The Karstic Edwards (Balcones Fault Zone) Aquifer Of South-Central Texas, Geary M. Schindel, Rudolph A. Rosen
Best Management Practices For Firefighting In The Karstic Edwards (Balcones Fault Zone) Aquifer Of South-Central Texas, Geary M. Schindel, Rudolph A. Rosen
Water Resources Science and Technology Faculty Publications
Karst aquifers are vulnerable to contamination from hazardous pollutants that can harm drinking water supplies, species inhabiting aquifers and springs, and other karst water resources. This paper presents best management practices (BMPs) designed for use by first responders, and for use in developing training curricula and tools to assist first responders in protecting karst water resources. Training and tools based on the BMPs will help first responders prevent or reduce runoff of potentially hazardous materials that can rapidly enter an aquifer during firefighting and other responses to emergencies in locations where hazardous materials are stored, such as in retail centers, …
Best Management Practices, First Responder Training, Planning Guidance And Tools To Increase Resilience And Protect Vulnerable Karst Aquifers From Contamination During Firefighting, Rudolph A. Rosen, Geary M. Schindel
Best Management Practices, First Responder Training, Planning Guidance And Tools To Increase Resilience And Protect Vulnerable Karst Aquifers From Contamination During Firefighting, Rudolph A. Rosen, Geary M. Schindel
Water Resources Science and Technology Conference Papers and Abstracts
No abstract provided.
Internet Of Texas Water Data: Use Cases For Flood, Drought, And Surface Water – Groundwater Interactions, Rudolph A. Rosen, Robert E. Mace, Sam Marie Hermitte, Richard Wade
Internet Of Texas Water Data: Use Cases For Flood, Drought, And Surface Water – Groundwater Interactions, Rudolph A. Rosen, Robert E. Mace, Sam Marie Hermitte, Richard Wade
Water Resources Science and Technology Faculty Publications
Experts representative of Texas’ water sectors identified critical water data needs and described the design of a comprehensive open access data system that facilitates use of public water data in Texas at the April 2018 Connecting Texas Water Data Workshop as reported in the Texas Water Journal. Participants described potential use cases to initiate work on the most critical data hubs for connecting Texas water data. This note is an update to work on the Internet of Texas Water Data initiative that describes progress on a flood dashboard by the Texas Water Development Board and development of use cases by …
Airborne Molecular Contamination: Recent Developments In The Understanding And Minimization For Advanced Semiconductor Device Manufacturing, Walter Den, Shih-Cheng Hu, Cesar M. Garza, Omid Ali Zargar
Airborne Molecular Contamination: Recent Developments In The Understanding And Minimization For Advanced Semiconductor Device Manufacturing, Walter Den, Shih-Cheng Hu, Cesar M. Garza, Omid Ali Zargar
Water Resources Science and Technology Faculty Publications
This review paper focuses on the recent knowledge about airborne molecular contamination (AMC) and its impacts on 300-mm wafer fabrication processes. The adverse impacts on process materials by both organic and inorganic micro-contaminants, and evidence of cross-contamination between processed wafers and the mainstream wafer handling tools, are two areas of discussion for the study. The review also aims to re-frame the industrial guideline for AMC from chemical-based to risk-based approach, which substantiates the potential impacts of individual families of AMCs that have been well-documented. This approach resonates well with the new AMC classification method recently proposed by the International Roadmap …
Water Education Stem Pathway From Middle School To University To Water Career: Education For The Next Generation Water Workforce, Rudolph A. Rosen
Water Education Stem Pathway From Middle School To University To Water Career: Education For The Next Generation Water Workforce, Rudolph A. Rosen
Water Resources Science and Technology Conference Papers and Abstracts
No abstract provided.
Emergency Responder’S Guide To Protecting The Edwards Aquifer: Instructional Enhancements, Rudolph A. Rosen, Marcus Gary
Emergency Responder’S Guide To Protecting The Edwards Aquifer: Instructional Enhancements, Rudolph A. Rosen, Marcus Gary
Other Materials
Coming soon
Chitosan Encapsulation Of Ferrateᵛᶦ For Controlled Release To Water: Mechanistic Insights And Degradation Of Organic Contaminant, Bo-Yen Chen, Hsuen-Wen Kuo, Virender K. Sharma, Walter Den
Chitosan Encapsulation Of Ferrateᵛᶦ For Controlled Release To Water: Mechanistic Insights And Degradation Of Organic Contaminant, Bo-Yen Chen, Hsuen-Wen Kuo, Virender K. Sharma, Walter Den
Water Resources Science and Technology Faculty Publications
Tetraoxy-anion of iron in +6 oxidation state (FeVIO42−, FeVI) commonly called ferrate, has shown tremendous potential as a green oxidative agent for decontaminating water and air. Encapsulation of solid potassium salt of ferrate (K2FeO4) circumvents the inherent drawbacks of the instability of ferrate under humid conditions. In the encapsulated strategy, controlled release without exposing the solid ferrate to the humid environment avoids self-decomposition of the oxidant by water in the air, and the ferrate is mostly used to decontaminate water efficiently. This study demonstrated the formulation of oxidative microcapsules …
Internet Of Texas Water Data: Use Cases For Flood, Drought, And Surface Water –Groundwater Interaction, Rudolph A. Rosen, Robert E. Mace
Internet Of Texas Water Data: Use Cases For Flood, Drought, And Surface Water –Groundwater Interaction, Rudolph A. Rosen, Robert E. Mace
Water Resources Science and Technology Book and E-Book Publications and Reports
Texas’ public and private companies, organizations, and agencies have collected water data for different purposes and at different scales for many years. These data are scattered across multiple platforms with different standards, often making important data sets inaccessible or incompatible. This leaves Texas’ decision makers, industries, landowners, and communities with significant amounts of data of limited use to support real-time decision making, development of opportunities for water security, or for modeling an accurate picture of Texas’ water future. On April 17, 2018, the Connecting Texas Water Data Workshop brought together experts representative of Texas’ water sectors to engage in the …
Water Education Leadership In Texas: Pathway For Students From Middle School To University Degree, Rudolph A. Rosen
Water Education Leadership In Texas: Pathway For Students From Middle School To University Degree, Rudolph A. Rosen
Water Resources Science and Technology Faculty Publications
Connecting students to water while they are in middle and high school is thought to be a key to making a connection to the importance of water and possibly stimulating high school graduates to consider technical training or a post-secondary degree in water. To take these students forward, Texas leaders in water education have advocated better alignment of existing technical training and degree programs. This alignment is considered an essential ingredient to building a pathway to careers in water. The post-secondary model relies on a mix of rigorous science and practical applied industry readiness training. Promoters of this model hope …
An Internet For Water: Connecting Texas Water Data, Rudolph A. Rosen, Sam Marie Hermitte, Suzanne Pierce, Sarah Richards, Susan V. Roberts
An Internet For Water: Connecting Texas Water Data, Rudolph A. Rosen, Sam Marie Hermitte, Suzanne Pierce, Sarah Richards, Susan V. Roberts
Water Resources Science and Technology Faculty Publications
The Connecting Texas Water Data Workshop brought together experts representative of Texas’ water sectors to engage in the identification of critical water data needs and to discuss the design of a data system that facilitates access to and the use of public water data in Texas. Workshop participants identified “use cases” that list data gaps, needs, and uses for water data and answered questions on who needs data, what data do they need, in what form do they need the data, and what decisions need to be made about water in Texas. They described desires for future water data management …
Water Security For Texas: A Post-Secondary Education Pathway For Water Workforce Readiness, Rudolph A. Rosen
Water Security For Texas: A Post-Secondary Education Pathway For Water Workforce Readiness, Rudolph A. Rosen
Water Resources Science and Technology Conference Papers and Abstracts
No abstract provided.
Border Areas Water Security: An Education Pathway For The Next Generation Water Workforce, Rudolph A. Rosen
Border Areas Water Security: An Education Pathway For The Next Generation Water Workforce, Rudolph A. Rosen
Water Resources Science and Technology Conference Papers and Abstracts
No abstract provided.
Foundation Of The Texas Aquatic Science Curriculum, Rudolph A. Rosen
Foundation Of The Texas Aquatic Science Curriculum, Rudolph A. Rosen
Water Resources Science and Technology Conference Papers and Abstracts
No abstract provided.
Water Security For Texas: A Post-Secondary Education Pathway For The Water Workforce, Rudolph A. Rosen, Luis A. Cifuentes, James Fischer, Howard Marquise, John C. Tracey
Water Security For Texas: A Post-Secondary Education Pathway For The Water Workforce, Rudolph A. Rosen, Luis A. Cifuentes, James Fischer, Howard Marquise, John C. Tracey
Water Resources Science and Technology Faculty Publications
Water and wastewater industry leaders in Texas and throughout the United States have expressed concern over high rates of retirement eligibility and difficulties finding and attracting workers ready to fill job openings, especially for work in smaller systems. In late January 2018, the U.S. Government Accountability Office released a report on water workforce readiness and a bill was introduced in the U.S. Senate to establish a water infrastructure workforce development program. Concern over existing education of workers in water and demographic information projecting future workforce readiness are commonly cited as signaling a coming crisis for the water industry. An alignment …