Environmental Health Commons^™

Environmental Risk Assessment Of Textile Waste From Bio-Engineered Fibers In The Fashion Industry, Aayush Pankaj Agarwal, Harshit Soral, Irmak Aktan, Karol Montserrat Gonzalez Saad, Maria Daniela Saa Espinosa, Sheetal Suhas Dhanuka, Yi Yang

Harrisburg University Dissertations and Theses

The global fashion industry generates over 92 million tons of textile waste annually, a figure projected to increase significantly by 2030. Bio-engineered fibers, including bacterial cellulose, mycelium-based leather, and recombinant protein textiles emerge as sustainable alternatives to conventional fibers. Despite their promise, recent evidence suggests that these fibers may pose environmental risks at the end-of-life stage, such as incomplete biodegradation in landfills, microfiber shedding, and chemical leaching from dyes and coatings. The purpose of this study is to examine how these risks are represented through scientific literature, corporate sustainability reports, and policy frameworks, and to identify strategies for integrating risk …

Unsaturated Fatty Acid Oil-Based Microdroplets: A Promising Novel Class Of Microdroplets, Ramiz S. Alejilat

Seton Hall University Dissertations and Theses (ETDs)

Droplet-based microfluidics has rapidly advanced numerous fields, including chemistry, biology, materials science, medicine, food science, and cosmetics. In these systems, fluorocarbon oil combined with fluorinated surfactants is the preferred medium for fluid encapsulation, offering exceptional stability and biocompatibility essential for sensitive biological and chemical processes. However, growing concerns about the environmental and biological risks associated with fluorinated chemicals have prompted a search for alternatives.

This study is the first to explore the use of unsaturated fatty acids derived from emu oil for microdroplet formation. We characterized droplet formation based on flow rates and the presence non-fluorinated surfactant at a certain …

Exposure To Pm2.5 And Aging., Daniel Chris Gomes

Electronic Theses and Dissertations

Inhalation of fine airborne particulate matter (PM_2.5) is an environmental risk factor for numerous health disorders, including cardiovascular diseases (CVD). While several studies have shown that PM_2.5 exposure can induce oxidative stress, DNA damage, and inflammation, the underlying mechanisms that translate these effects into systemic pathology remain poorly understood. Some recent studies have shown that PM_2.5 exposure can lead to telomere shortening in leukocytes, but the generality of this outcome and contribution to endothelial dysfunction has not yet been fully explored. We hypothesized that PM_2.5inhalation accelerates cellular aging and senescence in both circulating peripheral …

Environmental Sanitation In Long-Term Care Facilities: A Focus On Regulations And Implementations, Ruwan Dissanayake Dissanayake Mudiyanselage

All Theses

Environmental sanitation is a fundamental component of infection prevention in long-term care facilities (LTCFs), where residents are at increased risk due to advanced age, underlying health conditions, and communal living arrangements. Despite its critical role, significant gaps remain in implementing environmental sanitation procedures and the regulatory frameworks that guide them.

This study combines two components: (1) an across-state regulatory review of environmental sanitation in LTCF regulations and (2) a cross-sectional survey assessing environmental sanitation characteristics of nursing homes (NHs) and assisted living facilities (ALFs) and Rural and Urban LTCF observation study in South Carolina (SC) . For the regulatory review …

Evaluating Fall And Spring Planted Cover Crops For Integrated Management Of Herbicide Resistant Palmer Amaranth And Effect On Soil Health, Vipin Kumar

Dissertations and Doctoral Documents, University of Nebraska-Lincoln, 2023–

Herbicide-resistant Palmer amaranth (Amaranthus palmeri S. Watson) pose a severe threat to agronomic crop productivity in the United States, including corn and soybean production in Nebraska. Therefore, there is an urgent need for diversified and sustainable management approaches. Integrating cover crops (CCs) with herbicide programs represents a promising strategy to achieve Palmer amaranth suppression, sustain crop yields, and contribute to long-term soil health in irrigated corn–soybean production systems in Nebraska.

A meta-analysis of 41 studies and 595 paired observations demonstrated that CCs reduced Amaranthus spp. density and biomass by 37–59% depending on the growing season, with grasses and mixtures …

Emission Characterization And Health Risk Assessment Of Volatile Organic Compounds From Automotive Painting In Thailand, Vanitchaya Kultan, Sarawut Thepanondh, Jutarat Keawboonchu, Nattaporn Pinthong, Wissawa Malakan

Kesmas

The automotive industry is a significant source of volatile organic compound (VOC) emissions, particularly from solvent-based painting processes. This study evaluated VOC characteristics and distribution to assess associated health risks for workers and communities at varying distances from automotive painting facilities in Thailand, focusing on stacks and wastewater treatment plants that handle solvent-containing wastewater. The findings revealed aromatic compounds were predominant (66% of the total emissions), followed by oxygenated VOCs (26%). The stacks mainly emitted aromatics such as toluene and ethylbenzene, whereas the wastewater released oxygenated VOCs, particularly methyl isobutyl ketone and methyl ethyl ketone. The exposure concentrations in each …

The Impact Of Food Insecurity On The Physical And Mental Health Of Food Service Workers And Their Households, Pedro Andrade

Undergraduate Research Symposium Posters

Food insecurity in the United States continues to be a persistent problem, as this household stressor has worsened in the past decade. The prevalence of food insecurity varies by demographic; however, income is a key factor when discussing food security status. One group experiencing food insecurity, but often overlooked when talking about solutions, is food service workers. This research sought to understand the impact of food insecurity on food service workers and their households. A literature review was conducted to gain a deeper understanding of the associations between food insecurity and physical health, mental health, household health, and occupational and …

First Report Of A Bat Guano Fire From A Cave In Southeast Asia, Sopark Jantarit, Martin Ellis, Pruet Kalasuwan, Neeranuch Phusunti, Pimonsri Mittraparp-Arthorn, Jiranan Pattano, Arnon Chukamnerd, Turdtun Tong-In, Natthawut Khrueaaunruean

International Journal of Speleology

Fires occurring in cave guano are a rare and unusual phenomenon and the occurrence of such events in Southeast Asia is particularly novel. In this study, we document the first recorded instance of a bat guano fire in a tropical cave at Tham Chao Ram in Sukhothai province, northern Thailand. A bacteriological analysis was made of the guano at the fire site and from a control site within the cave. We give a comprehensive review of global reports on bat guano fires in caves, conduct an initial investigation of the physical factors at the fire site and discuss the potential …

Effects Of Photo-Oxidized Crude Oil On Gulf Killifish Early Life Stages, Charles Campbell

LSU Master's Theses

Photo-oxidation of spilled crude oil generates polar compounds that can heighten toxicity to marine fish embryos. We investigated the effects of photo-oxidized crude oil on early life stages of Gulf killifish (Fundulus grandis) by exposing embryos under flow-through conditions to water-accommodated fractions of four oil treatments: fresh oil unexposed to either sunlight or weathering referred to as dark control (DC), a UV-light oxidized whole oil (LT), the polar fraction extracted from LT (Pol) and the remnants after extracting the Pol from LT (NP). Oil loadings of 0.38–3.00 g oil/kg water were tested. Total PAH concentrations and chemical profiles …

An Integrated Ca–Markov Modeling Framework For Forecasting Land Use And Land Cover Dynamics In Arkansas, Usa, Rasool Vahid, Mohamed H. Aly

Environmental Dynamics Faculty Publications and Presentations

Land use and land cover (LULC) changes significantly shape urban environments and directly impact ecological and socioeconomic systems. This study aims to explore these interconnections by employing the Cellular Automata–Markov (CA–Markov) model to assess and predict LULC dynamics in Arkansas. Historical LULC datasets from 2001 to 2021, obtained from the National Land Cover Database, were simplified from 11 into 5 classes to facilitate analysis and effectively map transitions. The model was validated by predicting LULC for 2016 and 2021 and comparing the predictions with the real maps, achieving an overall accuracy of approximately 91.9%, using model validation metrics, including precision, …

Day-Night Shifts In Water-Soluble Ions Of Size-Resolved Aerosols Before And After The Covid-19 Lockdown In A Coastal Megacity: Metro Manila, Philippines, Grace Betito, Paola Angela Bañaga, Rachel A. Braun, Maria Obiminda Cambaliza, Melliza Templonuevo Cruz, Alexander B. Macdonald, James Bernard Simpas, Connor Stahl, Armin Sooroshian

SOSE Affiliate: Manila Observatory

The COVID-19 pandemic-driven lockdowns offer a unique opportunity to examine how reductions in anthropogenic emissions impacted atmospheric aerosol composition in urban environments. This study investigates the day-night variability of size-resolved water-soluble ions in ambient particulate matter (PM) collected in Metro Manila before (November 2019–February 2020) and after (November 2020–February 2021) lockdown implementation. Using tandem Micro-Orifice Uniform Deposit Impactors (MOUDIs), aerosol samples were collected during daytime (06:00–18:00) and nighttime (18:00–06:00) periods and analyzed for key ionic species (sulfate, ammonium, nitrate, oxalate, sodium, chloride, calcium, and magnesium) via ion chromatography. Submicrometer water-soluble mass declined post-lockdown, particularly during daytime, reflecting suppressed secondary formation …

Investigation Of Metals And Incidental Nanomaterials In Wildland-Urban Interface Fire Ashes And Their Impacts On Marine Phytoplankton, Talal Abdullah Alshehri

Theses and Dissertations

Wildfires are natural processes that have played a vital role in ecosystems for millions of years. However, with increasing anthropogenic activities and climate change, wildfires' frequency and intensity have increased. A wildfire is an uncontrolled fire that burns forests, grasses, and savannas. In addition to vegetation combustible materials, wildfire burn structure items such as homes, stores, and storage sheds in areas where the transition zone between urban and wildland is defined as the wildland-urban interface (WUI). Moreover, wildfires in WUI can burn vehicles, including automobiles, tractors, and boats on trails. Recently, there have been concerns regarding the metals, metalloids, and …

Compost Grinder For The University Of South Carolina Office Of Sustainability, Rori E. Pumphrey, Grace Yaegel, Aaron R. Sawyer, Bradley White

Senior Theses

This project originates from a collaboration with the USC Office of Sustainability, which seeks to improve the handling and processing of food waste generated on campus. The primary challenge is the difficulty in composting certain types of food waste, such as avocado pits, pumpkin rinds, and other dense or fibrous organic materials that are not easily broken down using conventional methods. Existing commercial solutions are often too large and expensive, or electrically powered, and are thus not well suited for the volume or nature of USC's food waste. To address these limitations, our team designed a manually operated food waste …

Persistent Chemicals In Particulate Matter (Pm) Near A Hazardous Waste Thermal Treatment Facility, Chuqi Guo, Martine E. Mathieu-Campbell, Thomas Blanchard, Lavrent Khachatryan, Md Abdullah Al-Mamun, Qingzhao Yu, Myron Lard, Oluwafeyikemi Ogunmusi, Brenda Vallee, Wilma Subra, Iriel Edwards, David Malone, Slawo Lomnicki, Stephania A. Cormier, Jennifer Richmond-Bryant

School of Public Health Faculty Publications

Colfax, an overburdened community in central Louisiana, hosts the last commercially-operated open-burn/open-detonation (OB/OD) hazardous waste thermal treatment facility in the United States. Until December 2023 when their permit disallowed OB/OD, the facility processed military waste, fireworks, propellants, soils excavated from Superfund sites, and other hazardous materials. This community-engaged study measured ambient fine particulate matter (PM2.5), environmentally persistent free radicals (EPFRs), polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs), and metals using two high-volume PM2.5 samplers deployed 1.2 mi and 9.0 mi from the facility from April, 2022 through February, 2023. Elevated PM2.5 concentrations were recorded at both sites during spring and summer 2022. …

A Case Study Of Long-Term Disease Burden In A Rural Community Near An Open Burn Facility, Arundhati Bakshi, Liana Baconguis, Md Abdullah Al-Mamun, Qingzhao Yu, Jennifer Richmond-Bryant, Stephania A. Cormier

School of Public Health Faculty Publications

Open burning and open detonation (OB/OD) of explosive and hazardous wastes creates various toxic waste products, including particulate matter, that is released into the atmosphere and capable of generating significant health impacts upon exposure. The last commercially run OB/OD thermal treatment facility in operation in the United States is located near the rural community of Colfax in central Louisiana. To evaluate the community’s concerns about the potential health impacts from air pollution due to the facility’s regular open burning of explosive and hazardous wastes, we examined the disease burden in Colfax compared to the surrounding parish and state. In a …

Air Pollution And Environmental Injustice Are Related To Respiratory Complications In Individuals With Sickle Cell Disease, Kelsey M. Maclin

All ETDs from UAB

Sickle cell disease (SCD) is a genetically inherited blood disorder affecting people of African descent. SCD is characterized by painful episodes and an acute lung injury known as acute chest syndrome (ACS). Patients with SCD have a life expectancy <19 years compared to Blacks without SCD. There is minimal research investigating air pollution and health complications in SCD. The aims of this research were to investigate whether pulmonary function is affected by exposure to ambient air pollution, whether higher air pollution concentrations are associated with hospitalizations for ACS, and whether environmental injustice impacts the respiratory health of children and young adults with SCD. Air pollution data on the criteria air pollutants (CAPs) was obtained from the US Environmental Protection Agency (EPA). Patient health data were obtained from Children’s Hospital of Alabama electronic medical records. Logistic regression, distributed lag non-linear regression, Granger Causality, and Getis-Ord Gi* hot spot analysis were used to analyze our data. The EPA’s EJScreen tool was used as a measure of exposure to environmental injustice. ArcGIS was used to map the EJScreen data. Exposure to short-term air pollution is significantly associated with a reduction in pulmonary function in children and young adults with SCD. Children and young adults exposed to a one-unit increase in the monthly average concentrations of sulfur dioxide (SO2) experienced an increase in the odds of having abnormal pulmonary function. We observed the trends of each criteria air pollutant in our study to be closely aligned with the trends in the hospitalizations for ACS. Most of our study participants with a history of ACS lived in areas burdened by greater environmental injustices. Specifically, the hot spots for ACS overlapped with the hot spots for PM2.5. Unequal exposure to environmental injustices leads to increases in hospitalizations for respiratory complications in individuals with SCD. Reductions in air pollution could be greatly beneficial to the pulmonary function and overall respiratory health of individuals with SCD. Further research is needed to examine associations between air pollution and hospitalizations for ACS in individuals with SCD.

Exploring The Relative Effects Of Natural Gas And Biogas Cooking On Indoor Air Quality In Residential Kitchens, Wande Benka-Coker, Kailey Sipe, Dinela Dedic, Alexander Jones, Bramley Hawkins, Emily Lyons, Matt Steiman, Megan L. Benka-Coker

Health Sciences Faculty Publications

Indoor air pollution from gas stove combustion remains a public health concern, given links to adverse cardiorespiratory health effects, yet few studies have characterized or compared the air quality impacts of different gas-based cooking fuels. We investigated kitchen-level concentrations of nitrogen dioxide (NO2) and fine particulate matter (PM2.5) concentrations in four homes in Central Pennsylvania that used natural gas and/or biogas fueled stoves. We conducted time-resolved kitchen monitoring and assessed pollutant concentrations during cooking and non-cooking periods. We applied linear mixed-effect regression models with kitchen-level random effects and time-varying covariates to estimate the influence of fuel type on indoor air …

Exploring Potential Impacts Of Polyethylene Mesh And Polypropylene Rope Leachate On Bay Scallop (Argopecten Irradians) Survival And Growth, Katherine R. Johnson

Graduate Masters Theses

The bay scallop (Argopecten irradians), a commercially and ecologically significant bivalve along the Eastern coast of the United States, has faced severe population declines due to various anthropogenic impacts. At the same time, the proliferation of plastics, particularly in maritime industries, has introduced new threats to marine environments through both physical pollution and chemical leaching. This study aimed to assess the acute toxicological effects of leachates from two commonly used plastic products, polyethylene Netron and polypropylene rope, on A. irradians larvae. Experiments were conducted in June–July 2023 at the Nantucket Shellfish Hatchery. Leachates were prepared by incubating 0.5, …

Evaluation Of South Carolina’S Extension And Outreach Agents’ Knowledge Of Harmful Algal Bloom Management And The Impacts Of One-Day Training, George Strickland, Debabrata Sahoo, Michael Vassalos, Heather Nix, Sarah White

Journal of Extension

Harmful algal blooms (HABs) impact livestock producers. Most Extension agents have limited knowledge about HAB management. Our study goal was to assess agent readiness and training on HABs. We used data from in-person surveys of South Carolina (SC) Extension personnel. We examined how training influenced HAB knowledge using pre/post-tests. Training improved agent knowledge of HAB management, but water resource agents learned more. The results of this study can be used to identify Extension training shortfalls and drive policy to better prepare agents throughout the state. Further research should involve prioritizing additional extension topics and assessing knowledge in a similar manner.

The Characterization Of Per- And Polyfluoroalkyl Substances (Pfas) In Nebraska Drinking Water And Human Health Impacts, Sarah Tucker

Theses & Dissertations

Per- and polyfluoroalkyl substances (PFAS) are synthetic compounds that have been detected in water sources of urban and rural environments with evidence of adverse human health effects from exposure. Humans are primarily exposed through ingestion of contaminated water and food. PFAS exposure has been linked to negative multi-system health outcomes (liver, kidneys, cardiovascular, reproductive, and immune). PFAS occur as persistent mixtures in environmental media with decades long consequences to water quality. While national agencies have launched large-scale PFAS water quality monitoring studies, limited data exists for contamination of rural water in Nebraska, especially private wells. The aims of this study …