Environmental Chemistry Commons^™

Isolated Point Discharges Into Coastal Swashes As Nutrient Sources To Coastal Waters, Mary E. Olsen

Honors Theses

Coastal water quality in the Grand Strand of South Carolina is directly influenced by human activities. Nutrient-rich runoff, stemming from numerous anthropogenic sources, finds its way into coastal waters through freshwater inputs often through tidal creeks, termed swashes. In order to better describe the amount of nutrient inputs into Singleton Swash and White Point Swash, we examine anthropogenic runoff from isolated identifiable point discharges and their nutrient concentrations. We report concentrations of dissolved inorganic nitrogen (DIN, as the sum of nitrate, nitrite and ammonium) and phosphate in discharge and creek water. We hypothesize that nutrient concentrations of isolated, minor point …

006— Pretreatment And Fiber Content Analysis Of Cannabis Sativa, Dina Bu, Jessica Roggie, Sarah Schmidlin, Barnabas Gikonyo

GREAT Day Posters

Cannabis sativa commonly known as hemp is one of the fastest-growing plants whose refined products have immense commercial value. Various products include refined hemp such as: biofuels, biodegradable plastics, textiles, dietary supplements, paper, clothing, and much more. Hemp fibers are also used in construction and manufacturing applications by strengthening their composite products. Hemp is a high yielding, sustainable, and environmentally friendly crop due to its various qualities, and has the potential to yield valuable raw materials for a great number of applications. Our research evaluates the pretreatment of hemp as well as the comparative analysis of the fiber content thereof. …

041— Fiber Decomposition And Pretreatment Analysis Of Cannabis Sativa L.: Hemp, Dina Bu, Jessica Roggie, Sarah Schmidlin, Barnabas Gikonyo

GREAT Day Posters

Hemp is a subspecies of Cannabis sativa L. along with marijuana, yet the two differ in chemical constituent levels of delta-9-tetrahydrocannabinol (THC) and cannabidiol (CBD). Hemp contains 0.3% THC, compared to marijuana 17.1%, allowing it to be a safe and compelling biomass for investigation. The refined products of hemp are vast due to its fast-growing properties; therefore various commercial industries have included refined hemp in biofuels, biodegradable plastics, textiles, dietary supplements, paper, clothing, and much more. Construction and manufacturing applications have also been seen to include hemp to strengthen their composite products. The high-yielding, sustainable, and environmentally friendly qualities …

Anion Removal By Partially Positive Adsorbents, Breanna Dragseth, Matt Desmith, Emily Robinson, Abi Bartlett

Undergraduate Research Symposium 2021

Nitrates and phosphates exist naturally but are present in elevated concentrations in many areas primarily due to agriculture; these elevated concentrations are concerning for human and environmental health. The project considered the ability of four different materials used for adsorption (adsorbents) to adsorb nitrate and phosphate. All adsorbents had a silica base with an amine (NH2) group and were further functionalized with different ligands consisting of an aromatic ring functionalized with electron withdrawing groups, creating a partial positive environment to help attract the anions of interest. We also synthesized control materials to determine how effective our engineered materials are. The …

Co2 Capturing Materials, Isaac Sanchez

Undergraduate Research Symposium 2021

Greenhouse gas emissions are one of, if not the major cause of global warming. With CO₂ emissions rising annually, it is paramount to selectively capture and remove CO₂ from flue gas. One method of capturing CO₂ gas is via porous materials. Covalent organic frameworks (COFs) are porous materials which have been explored throughout this research. Two important features of COFs are the base unit linkage types (BULTs) and the functional groups attached to the organic linkers (OLs). The BULT used in this research was a covalent triazine framework (CTF) and the main functional group used in the …

Comparison Of Methods For Measuring Cation Exchange Capacity In Clays, Sarah Glaesemann

Undergraduate Research Conference

No abstract provided.

Kathmandu Nepal - 1993

World Data - Asia

Relevant Publications

Environmental Science & Technology Publication (1995)

Thessaloniki Greece - 1992

World Data - Europe

Relevant Publications

Environmental Science & Technology Publication (1995)

3rd International Symposium: Transport and Air Pollution (1994)

Tulsa - Wb Us64 To Sb Us169

United States Data - Oklahoma

Relevant Publications

Environmental Science & Technology Publication (2006)

Environmental Science & Technology Publication (2008)

Environmental Science & Technology Publication (2014)

Environmental Science & Technology Publication (2015)

Environmental Science & Technology Publication (2021)

2003 Final Report

2013 Final Report

2015 Final Report

2017 Final Report

2019 Final Report

Fort Mchenry Tunnel - 1991

United States Data - Maryland

Relevant Publications

Air & Waste Management Association Publication (1994)

Atmospheric Environment Publication (1996)

Characterization Of Uranium, Lead, And Rare Earth Element Pollution In Natural Soils And Sediments, Hope Rasmussen

Civil and Environmental Engineering Theses and Dissertations

Heavy metals in the environment add to the global burden of pollution, negatively impacting public health and ecosystem resilience. This study included projects regarding uranium (U), lead (Pb), and rare earth elements (REE) in natural samples, due to their known toxicity, ubiquity, and relevance in context to recent pollution trends. The first project focused on testing the potential of using a hydroxyapatite product as a remediation solution for U-contaminated groundwater and soil at an EPA Superfund site. The results showed that the U was sequestered in a highly crystalline mineral form within the solids, guiding the EPA to specify the …

Past, Present, And Future– A Review Of Berrien County Water And Great Lakes Water Resources And Quality, Jongwan Bae

Honors Scholars & Undergraduate Research Poster Symposium Programs

The decrease in water quality for environmental and drinking water has been prevalent in the Great Lakes region, where industrialization, agricultural development, and population increase have contributed substantially. Looking through historical reports and the present, the degradation in water quality will likely continue. Our research intends to use inductively coupled plasma atomic emission spectroscopy to create a methodology to quantitatively detect various heavy metals and other elements from any water source. Current research has been on the determination of a niche in water testing and the creation of an infographic, as well as data of simple water samples.

Copper (Ii) Sequestration By Pamam Dendrimers In Tap Water, Hannah Castillo

Honors Scholars & Undergraduate Research Poster Symposium Programs

Dendrimers are nanomaterials that are widely studied for a variety of applications because of their distinctive properties. One such property of, specifically, the generation 2-PAMAM Dendrimer is its particular affinity for copper (II) ions. This could be influential in selective heavy metal extraction, particularly in contaminated water. Our research aims to test the sequestration and selectivity of PAMAM dendrimers with amine surface groups for copper (II) ions in a chemical environment with interfering species, such as tap water, using Inductively Coupled Plasma spectroscopy. Ongoing research has involved developing methods for dendrimer extractions and creating calibration curves for standards to ensure …

Determination Of Atrazine In Glacier Creek Using Gas Chromatography-Mass Spectrometry, Spencer Witte

UNO Student Research and Creative Activity Fair

Atrazine is a commonly used herbicide in agriculture that has been shown to cause adverse health-effects on biological organisms. Glacier Creek Preserve (GCP), a prairie preserve near Omaha, NE, contains restored prairie and agricultural land uses within a single watershed. Surface water samples were collected at various locations of GCP from May to July to quantify atrazine concentrations. Sample preparation included filtering with a 0.45 micron filter and solid-phase extraction (SPE) with a reversed-phase cartridge. The analyte was eluted off the cartridge with ethyl acetate and analyzed by gas chromatography-mass spectrometry (GC/MS). Quantitation was performed with an internal standard calibration …

Representing Methane Emissions From Wet Tropical Forest Soils Using Microbial Functional Groups Constrained By Soil Diffusivity, Debjani Sihi, Xiaofeng Xu, Mónica Salazar Ortiz, Christine S. O'Connell, Whendee L. Silver, Carla López-Lloreda, Julia M. Brenner, Ryan K. Quinn, Jana R. Phillips, Brent D. Newman, Melanie A. Mayes

Biology, Chemistry, and Environmental Sciences Faculty Articles and Research

Tropical ecosystems contribute significantly to global emissions of methane (CH₄), and landscape topography influences the rate of CH₄ emissions from wet tropical forest soils. However, extreme events such as drought can alter normal topographic patterns of emissions. Here we explain the dynamics of CH₄ emissions during normal and drought conditions across a catena in the Luquillo Experimental Forest, Puerto Rico. Valley soils served as the major source of CH₄ emissions in a normal precipitation year (2016), but drought recovery in 2015 resulted in dramatic pulses in CH₄ emissions from all topographic positions. Geochemical parameters …

Denver - Speer Blvd & I-25

United States Data - Colorado

Relevant Publications

Air & Waste Management Association Publication (1996)

Environmental Science & Technology Publication (2000)

1998 Final Report

Denver 6th Ave & I-25

United States Data - Colorado

Relevant Publications

Atmospheric Environment Publication (2002)

Environmental Science & Technology Publication (1997)

Environmental Science & Technology Publication (1998)

Environmental Science & Technology Publication (2003)

Environmental Science & Technology Publication (2006)

Environmental Science & Technology Publication (2008)

Environmental Science & Technology Publication (2014)

Environmental Science & Technology Publication (2015)

Environmental Science & Technology Publication (2021)

1999 Final Report

2000 Final Report

2001 Final Report

2003 Final Report

2005 Final Report

2007 Final Report

2013 Final Report

2017 Final Report

2020 Final Report

Fresno

United States Data - California

Relevant Publications

Environmental Science & Technology Publication (2010)

2008 Final Report

2021 Final Report

The Effect Of Amino Acids And Molar Peroxide Ratio On The Oxidation Of 2,4 Dinitroanisole In An Ultraviolet Light Emitting Diode/H2O2 Advanced Oxidation Process, Jeffry P. Hart

Theses and Dissertations

2,4 Dinitroanisole (DNAN) is an organic insensitive munition that is a likely candidate to replace trinitrotoluene (TNT) for a variety of purposes. Advanced Oxidation Processes (AOPs) are a promising method that have the potential to reduce a variety of persistent chemicals, however, the performance of these systems may be degraded by co-contaminants in the influent. In this contribution, DNAN, with casamino acids as a co-contaminant, was oxidized with Ultraviolet (UV) Light Emitting Diodes (LEDs) with hydrogen peroxide (H₂O₂) in an AOP in a laboratory. The UV/ H₂O₂ AOP was capable of degrading DNAN …

Soil Quality Indices As Affected By Long-Term Burning, Irrigation, Tillage, And Fertility Management, Helen C.S. Amorim, Amanda Ashworth, Kristofor R. Brye, Brian J. Wienhold, Mary C. Savin, Phillip R. Owens, Sergio Silva

Crop, Soil and Environmental Sciences Faculty Publications and Presentations

Understanding the impacts of long-term agricultural practices on soil quality (SQ) is key for sustaining agroecosystem productivity. This study investigated conventional and no-tillage (NT), residue burning and no burning, residue level (high and low), and irrigation (irrigated and dryland) effects on soil properties, SQ, and crop yields following 16 yr of a wheat (Triticum aestivum L.)–soybean [Glycine max (L.) Merr.] double-crop system via the Soil Management Assessment Framework (SMAF). A field experiment was conducted in the Lower Mississippi River Delta region on a silt-loam soil. Bulk density, soil organic C (SOC), total N (TN), pH, electrical conductivity (EC), …