Digital Commons Network^™

Case Studies To Examine Farmer Perceptions And Implementations Of Buffer Capacity In Southeastern Ontario, Bryan Collins

Journal of Applied Farm Economics

Buffer capacity measures the ability of a system to maintain its original function when confronted with outside stresses and is often considered to be a key component of resilience. Farmers in southeastern Ontario are facing several threats such as seasonal drought and volatile markets, prompting necessary responses on how to effectively manage their farms. This research study used an exploratory grounded theory approach to inquire how farmers seek to enhance buffer capacity on their farm by asking (1) what short-term threats their farm faces and (2) what strategies they are employing to navigate those threats. Ten farms in the Inverary …

Subjective Perspectives On Antarctic Wilderness: An Application Of Integral Ecology, Annabelle G. Mayes

Honors College Theses

Parties to the Antarctic Treaty have set Antarctica aside for peace, scientific research, and environmental protection. However, they have yet to take concrete actions to protect Antarctica’s wilderness values as agreed under the 1991 Protocol on Environmental Protection to the Antarctic Treaty. Meanwhile, pristine areas that are free from human interference are declining as human activity escalates. This study examines perceptions of Antarctic wilderness through the lens of integral ecology. Data from 1,640 people and 16 study populations were extracted from four published studies. Content analysis was conducted to determine how subjective perspectives differ across populations and geographic regions. All …

Colonial Whaling In Walvis Bay And In Southern Africa: Environmental Exploitation And Legacy Of South Africa’S Cetaceans, Jake L. Zarak

Swarthmore Undergraduate History Journal

This paper examines the colonial whaling industry in Southern Africa, with a focus on Walvis Bay, tracing its long term environmental and socio-economic impacts. From the 1700s to the 1900s, whaling operations, primarily led by American, British, and French enterprises, exploited the region’s rich populations of sperm and right whales, drastically reducing their numbers. The study contextualizes whaling within a broader colonial framework, analyzing its effects on whale migratory patterns, indigenous communities, and marine ecosystems. It explores as well, the transition from whaling as an economic endeavor to modern conservation efforts and the romanticization of whales in literature and art. …

Conflict And Community Building In Waste Water Management: The Case Of Azrou Morocco, Jack V. Kalpakian

Peace and Conflict Studies Journal Conference

Climate change is forcing Morocco to institute a wide program of wastewater treatment. Despite legal and bureaucratic problems, the water is being reused directly or indirectly. But the construction of water treatment plants is leading to conflicts with farmers that depended on the untreated water and the use of treated water for green spaces and parks is also often viewed with suspicion. Using the case of the Azrou water treatment plant, this paper argues that while the infrastructure and technical adjustments to climate change have been effective, a gap in understanding between the water managers and the public they serve …

Writing From The Rift: Queer Temporality And The Refusal Of Resolution, Daniela Ruiz Perez

Masters Theses

This thesis develops a phenomenological method for reading speculative literature as a site where queer ecological temporality is experienced rather than explained. Working with Annihilation (2014) by Jeff VanderMeer, The Day of the Triffids (1951) by John Wyndham, and Undrowned: Black Feminist Lessons from Marine Mammals (2020) by Alexis Pauline Gumbs, the project treats reading as a bodily practice shaped by forms of attention. Texts are not interpreted for stable meaning and instead I remain with moments where resolution is withheld. The work is informed by a Marxist attention to how capitalist time organizes labor, productivity, and value, and how …

Urban Forestry In Selected Nepali And Us Cities: Assessment, Analysis, And Recommendations, Ambika P. Adhikari, Keshav Bhattarai

Himalayan Research Papers Archive

Urban forest delivers several benefits to urban area residents. The benefits include shade, dust control, noise mitigation, water retention, ecological services, pedestrian comfort, aesthetic improvements, and economic benefit to the community, including the provision of food. Nepali urban areas face several environmental and infrastructure-related problems that include air and noise pollution, frequent street flooding, and unclean roads and sidewalks. Further, a vast majority of pedestrians in cities face discomforting, unpleasant, unhygienic, and unsafe conditions. Urban forests can help alleviate many of these problems at a low cost as trees provide shade to the pedestrians, absorb dust and noise, and can …

Food Green Cities For Urban Sustainability (Book), Ambika P. Adhikari, Keshav Bhattarai, Drona Rasali, Sunil Babu Shrestha

Himalayan Research Papers Archive

The book delves into the essential role of urban agriculture, forestry, and sustainable practices in ensuring food security while addressing the challenges of climate change and urbanization. It highlights urban greening and sustainable land use as strategies to create livable cities and mitigate environmental degradation. Through its chapters, the book offers a rich compilation of research, practical solutions, and transferable strategies for application in other developing countries.

Urban Sprawl And Residential Carbon Emissions: Evidence From Indonesia And The Philippines, Yi Jiang, Taylor Lathrop, Alexander D. Rothenberg, Yao Wang

Center for Policy Research

This paper studies how neighborhood density affects residential carbon emissions, using detailed data from Indonesia and the Philippines. To address simultaneity, we instrument density with soil characteristics, and to address sorting, we control for community averages of observed characteristics. Unlike cities in developed countries, we find that density is positively correlated with residential energy use. After controlling for sorting, we find a precise null relationship between density and residential carbon emissions. Our results suggest that policies to control urban sprawl may not be successful in reducing residential carbon emissions in developing country cities.

A Study Of The Impacts Of Infusing Data Analysis And Research In An Interdisciplinary Environmental Economics Course, Sean P. Macdonald

Numeracy

This paper explores the impacts of introducing quantitative literacy skills in an interdisciplinary Environmental Economics course typically taught as an issues and policy course without a quantitative component. The study examines the effects of infusing an engaging, student-selected data collection and analysis assignment on students' quantitative reasoning skills, as well as their interest in and attitudes about data analysis and quantitative information. Using data gathered from a set of pre- and post-assessment questions designed to measure changes in quantitative reasoning skills and attitudes, the findings point to significant attitudinal impacts, gains, but smaller, insignificant gains in quantitative reasoning skills.

Dna Of Leadership To Guide Our Existential Purposes Toward Kindness, Hakan Kapucu

The Journal of Values-Based Leadership

This article examines the intersection of leadership and humanity’s quest for existential purpose, highlighting the role of human values such as kindness, empathy, respect, and ethics in guiding individuals toward meaning. It examines how existential purposes—shaped by philosophical, spiritual, social, and scientific perspectives—align with values that foster personal fulfillment and collective well-being. The article highlights the potential of leaders to address existential struggles, such as the dread of insignificance or isolation, by creating purpose-driven workplaces. Two leadership styles, servant leadership and technoversal leadership, are presented as exemplary models. Servant leadership prioritizes community, fostering environments where individuals discover purpose through shared …

Owning The Green Grid: The Political Economy Of Renewable Energy Policy Design, Joshua A. Basseches

Faculty Scholarship

How corporate ownership of the electricity grid matters to state-level renewable energy policymaking.

Historically (and for the foreseeable future), most public policy action in the United States to combat the global climate crisis has taken place at the state level. Former President Joe Biden’s administration marked a significant departure from that trend, as his policies pursued a strategy of “electrify everything” (transportation, buildings, and industry). But who owns the electricity system that is the linchpin of such a strategy, and how does this ownership affect the policy preferences of interest groups at the state level? Owning the Green Grid addresses …

Setting The Recycling Narrative: A Thematic Analysis Of Recycling Webpages In The United States, Haley Nolde

Dissertations and Theses

Recycling is widely promoted in the United States as a central strategy for waste diversion and sustainable materials management, yet recycling outcomes remain inconsistent and public understanding is often fragmented. While substantial research examines recycling behavior, infrastructure, material science, and markets, less attention has been paid to how recycling itself is framed and communicated to the public. This thesis addresses that gap by examining narratives produced by recycling thought leader organizations (TLOs) in the United States. Using thematic analysis, this study analyzes publicly available recycling webpages from 99 TLOs, including state government agencies, state-level non-governmental organizations (NGOs), national and regional …

When Words Flow Like Water: How The Enbridge Line 3 Pipeline Environmental Impact Statement Failed To Prevent Hydrogeologic Harm In Minnesota, Carly Gutzmann

Journal of Earth and Life Science

For the aquifers of Minnesota, the environmental impact statement (EIS) was a promise of protection that never left the page. An environmental impact statement is meant to be an aid in the decision making process in order to ensure that projects consider potential environmental harms that may occur. However, they are often used instead as another regulatory box to check, rather than as active considerations when planning. As such, a project plan can be flawed from the start—if project developers only consider environmental impacts after they have already put considerable time, effort, and funding into their project as-is, they may …

Localized Air Pollution Impacts From Data Centers In Northern Virginia, Damian Pitt, Ivan Suen, Ellie Plisko

Institute for Sustainable Energy and Environment Publications and Presentations

This report examins the extent of air pollution emissions resulting from the use of backup generators at data centers in Northern Virginia, including both actual current emissions and potential future emissions, and how those emissions totals compare to other sources of air pollution in the Northern Virginia region. It also examines how exposure to data center emissions correlates with demographic characteristics such as race, income, and education.

We while the air pollution emissions from individual data centers is minor, the collective impact from the 100+ such facilities in the Northern Virginia region is significant. Notably, the cumulative emissions exposure in …

Land Use And Land Cover Simulation Via Integrated Modelling With Gis Techniques For Sustainable Land Utilization Development In The Northeast Khong Subwatershed Of Thailand, ฺBanchongsak Faksomboon, Thipphaphone Keoviyavong

Applied Environmental Research

Land utilization is an important indicator of socioeconomic and environmental changes caused by both natural and man-made factors. Land use and land cover (LULC) simulation is a critical tool for monitoring and predicting LULC and is essential for sustainable development, land resource management and planning. The cellular automata (CA) Markov model is the basis for the current study’s prediction of LULC changes in the Northeast Khong Sub Watershed (NKSW). Landsat data from 2013 to 2023 were used to investigate LULC classification and determine the spatiotemporal distributions of LULC. In addition, LULC data from 2013 and 2023 were used to generate …

Reduction Of Cr(Vi) With Infrared Light And Chemical Adsorption Of Cr(Iii) By A God-Crown/Bentonite Composite For Electroplating Waste Remediation, Andre Taufik Kurniawan, Muhammad Djoni Bustan, Sri Haryati

Applied Environmental Research

Heavy metal pollution, particularly chromium (Cr) from electroplating industrial waste, has severely threatened environmental quality and human health. This study aims to develop a composite adsorbent material based on bentonite and god crown biomass capable of removing chromium ions from liquid waste through a combination of reduction and adsorption mechanisms. The god crown/bentonite (GC/Bt) composite was synthesized at a mass ratio of 2:1 and calcined at 900°C. FTIR characterization revealed active functional groups (–OH, C=O, Si–O, and Al–O–Si), whereas BET analysis revealed a mesoporous structure (surface area 31.12 m2 g-1, pore diameter 4.37 nm) suitable for ion diffusion. The reduction …

Seasonal Variations In Co2 Emission From Poultry Manure-Amended Soils In Two Contrasting Tropical Agroecosystems, Gladys M. Akande, Adebayo J. Adeyemo, Chidozie J. Oraegbunam, Iduh J.J. Otene, Ezekiel C. Are, Babatunde S. Ewulo, Chioma M. Ahukaemere, Samuel O. Kolawole, Sunday E. Obalum

Applied Environmental Research

The soil remains the largest carbon sink, the capacity of which varies spatiotemporally and with anthropogenic activities, with implications for carbon dioxide (CO2) emissions and associated global warming. Despite the increasing popularity of organic amendments in the ecologically and anthropoculturally diverse farming systems of tropical Africa, manure-induced CO2 emissions in this region with high soil-carbon-sequestration potential are poorly documented. This study assessed seasonal CO2 emissions from poultry manure-amended sandy-clay-loam and sandy-loam soils in the Rainforest-Savannah and Southern Guinea Savannah zones, respectively, of Nigeria. Following manure application at 3 rates (0, 10, and 15 t ha-1), soil samples were collected during …

Activated Carbon Prepared From Residual Eucalyptus Wood For The Removal Of Methyl Orange: Equilibrium, Kinetics, Thermodynamics, And Desorption, Mathin Jaikua, Phuthidhorn Thanaphu, Sunisa Ungwiwatkul, Jakkrawut Maitip, Kanyarak Prasertboonyai

Applied Environmental Research

This research utilizes activated carbon derived from residual Eucalyptus wood (EW) for the removal of methyl orange (MO). The residual Eucalyptus wood-based activated carbon (EWAC) was produced through carbonization at 400 °C (EWC) followed by activation with a mass ratio of H3PO4 to EWC of 1:3, which was conducted at 800 °C for 1 h. The characterization of the EWAC involved various analytical techniques, including FTIR, XRD, BET, and CHN analysis. The adsorption parameters, such as pH (range: 3–8), adsorbent dose (range: 0.01–0.5 g per 50 mL of MO solution), contact time (range: 5–720 min), initial MO concentration (range: 5–600 …

Bioremediation Potential Of Indigenous Stutzerimonas Stutzeri 08tbb Isolated From Mercury-Contaminated Gold Mining Sites In Indonesia, Uun Rohmawati, Juanita Hibatullah, Achmad Rodiansyah, Yunita Messe, Dwi Nur Aini Fajriah

Applied Environmental Research

Artisanal and small-scale gold mining (ASGM) widely uses mercury (Hg) in the amalgamation process, and the resulting waste is often discharged directly into the environment, posing serious risks to ecosystems and human health because of the high toxicity of Hg. This study aimed to isolate and screen indigenous Hg-tolerant bacteria from contaminated gold mining sites in Indonesia; characterize the most effective isolate using morphological, biochemical, and molecular approaches; evaluate Hg(II) degradation performance using ICP‒OES, FTIR, and SEM analyses; and identify key metabolites involved in Hg detoxification through untargeted LC–HRMS metabolomics. A total of 51 bacterial isolates were obtained from Hg-contaminated …

Assessment Of Chromosomal Abnormalities In Hybrid Catfish In Reservoir Contaminated With Heavy Metals From Municipal Landfill, Tanadol Savigun, Natchanon Thiratanaboon, Nuttawadee Maneesan, Manop Sriuttha, Lamyai Neeratanaphan

Applied Environmental Research

In this study, the concentrations of heavy metals (As, Cd, Cr and Pb) in water, sediment, and hybrid catfish (Clarias gariepinus x C. macrocephalus) as well as chromosomal abnormalities (CAs) from a reservoir affected by leachate from a municipal landfill were compared to those in an unaffected reservoir. Heavy metal concentrations were analyzed using inductively coupled plasma‒optical emission spectrometry (ICP‒OES). Chromosomes were prepared from kidney cells by direct methods. The As, Cd and Pb concentrations in the water and sediment from both reservoirs were within the Thailand water and soil standards. The concentrations of As and Cd in the water …

Ammonium Adsorption From Aqueous Solutions Using Mnfe2o4-Functionalized Coffee Husk Biochar Nanocomposites : An Evaluation Of Hno3 And Naoh Activation, Thuy-Tien Do, Huu-Tap Van, Thi-Minh-Thu Nguyen

Applied Environmental Research

This research investigated the development of MnFe2O4-based composite adsorbents (MFO@CFA and MFO@CFB) by activating coffee husk-derived biochar with HNO3 and NaOH, followed by synthesis through coprecipitation and hydrothermal techniques. The structural and chemical properties of the nanocomposites were characterized by scanning electron microscopy (SEM) and Fourier transform infrared (FTIR) spectroscopy. Batch adsorption experiments were used to assess ammonium removal efficiency across a range of conditions: solution pH (3–8), contact time (5–120 min), adsorbent dosage (0.2–3 g L-1), and initial ammonium concentration (10–60 mg L-1). The findings indicated that compared with MFO@CFB, which was synthesized from NaOH-activated biochar, MFO@ CFA, derived …

Assessing Forest Fragmentation And Edge Expansion In Nan Province, Thailand, Using Landsat Data (2014–2022), Kasidit Rison, Marut Fuangarworn, Chatchawan Chaisuekul

Applied Environmental Research

The increasing pressure from land-use change and agricultural expansion in Nan Province, northern Thailand, has accelerated forest fragmentation and reduced the ecosystem service value (ESV) of the landscape. This study aims to: assess land use and forest fragmentation change in Nan Province between 2014 and 2022, and evaluate the impact of land use change on ESV. Landsat 8 OLI satellite imagery from 2014 and 2022 was used to classify land cover into five types: forest, agriculture, settlements, exposed soil, and others. Forest fragmentation was evaluated using landscape metrics such as patch number, mean patch size, edge length, and core area. …

Application Of Diatom Indices To Monitor Environmental Shifts In The Downstream Tuntang River, Central Java, Mirza Hanif Al Falah, Tri Retnaningsih Soeprobowati, Hadiyanto -, Muhammad Isnaini Ibnu Sabil, Marta Wojewódka-Przybył, Łukasz Kruszewski, Paweł Rydelek

Applied Environmental Research

Diatoms are widely recognized as sensitive bioindicators for reconstructing past water quality and ecological changes in aquatic ecosystems. In this study, multiple diatom-based indices were applied to sediment cores collected from three downstream stations of the Tuntang River, Central Java, to infer long-term environmental change in a tropical river system. A total of 38 sediment subsamples were analyzed, with dominant taxa including Fragilaria crotonensis (2.4–18.6%), Nitzschia palea (3.1–22.4%), and Aulacoseira granulata (2.0–15.8%), indicating sustained nutrient enrichment. Diatom indices consistently classified conditions as mesotrophic to eutrophic throughout the sediment profiles. The occurrence of the marine diatom Cylindrotheca closterium (up to 6.3%) …

Environmental Sustainability Performance And Efficiency In Thailand’S Rajabhat Universities : A Cross-Regional Analysis Of The Impact Rankings, Konstantinos Balis

Applied Environmental Research

Higher education institutions (HEIs) are expected to increasingly communicate their contributions to the United Nations’ Sustainable Development Goals (SDGs), with the rise of alternative sustainability rankings serving as prominent reporting instruments for institutional transparency. In Thailand, Rajabhat Universities, a network of government HEIs historically associated with their mission of teacher training and local development, have been actively participating in the Times Higher Education (THE) Impact Rankings, presenting a unique case study to explore cross-regional sustainability efforts in relation to global benchmarks. To evaluate trends, regional disparities, and engagement performance across the sustainability pillars, this study uses a descriptive quantitative design …

Initial Screening Of Halophilic Plastic-Degrading Bacteria From Mangrove Water And Sediment In Pekalongan, Indonesia, Novia Safinatunnajah, Muhammad Zainuri, Aris Ismanto, Tony Hadibarata, Kunarso -, Sugeng Widada, Hermin Pancasakti Kusumaningrum, Candra Wahyuningsih

Applied Environmental Research

Microplastic pollution in tropical mangrove ecosystems represents an increasing environmental concern, particularly in coastal regions such as Pekalongan, Indonesia, where industrial and residential activities contribute substantially to plastic waste. This study aimed to isolate and preliminarily screen halophilic bacteria from mangrove sediments and seawater collected from a plastic-impacted coastal area. Using mineral salt medium (MSM) supplemented with polyethylene glycol (PEG), six bacterial strains were obtained and evaluated for their potential to interact with polyethylene (PE) and polypropylene (PP) on the basis of gravimetric weight loss measurements. Among the isolates, Halomonas Cupida A1, Marinobacter nauticus A6.3, and Marinobacter nauticus SD5.2 exhibited …

การกำจัดไอออนตะกั่วจากน้ำเสียด้วยตะกอนจุลินทรีย์, ชยาภาส ทับทอง

Applied Environmental Research

งานวิจัยนี้มีวัตถุประสงค์เพื่อศึกษาความสามารถในการกำจัดไอออนตะกั่วของ ตะกอนจุลินทรีย์ที่ไม่มีชีวิต โดยการเปลี่ยนแปลงความเข้มข้นของสารละลายเริ่มต้นและปริมาณการใช้ตะกอนจุลินทรีย์ ตะกอน จุลินทรีย์ที่ใช้เป็นวัสดุดูดซับในการทดลองนี้มี 3 ชนิด โดย 2 ชนิดแรก คือ AS-P และ MUR-P ได้จากระบบบำบัดน้ำเสีย Activated Sludge และ Upflow Anaerobic Sludge Blanket ของอุตสาหกรรมน้ำอัดลม ส่วนชนิดที่ 3 คือ CASS-N ได้จากระบบบำบัดน้ำเสีย Cyclic Activated Sludge System ของโรงควบคุมคุณภาพน้ำ กรุงเทพมหานคร ตะกอนจุลินทรีย์ที่ได้จะนำมาล้างด้วยน้ำกลั่น อบแห้งในตู้อบที่อุณหภูมิ 105°C บดและแยกขนาดให้ได้อนุภาคที่มีขนาดเส้นผ่านศูนย์กลางประมาณ 106-150 ไมโครเมตร จากผลการทดลองพบว่าการดูดซับจะเข้าสู่สมดุลที่เวลา 15 นาที โดยมีเปอร์เซ็นต์การกำจัดไอออนตะกั่วสูงถึง 94-99 เปอร์เซ็นต์ ที่ความเข้มข้นของสารละลายเริ่มต้น 60 มิลลิกรัมต่อลิตร นอกจากนี้ ยังใช้สมการไอโซเทอร์มการดูดซับของ แลงเมียร์ (Langmuir adsorption isotherm) และไอโซเทอร์มการดูดซับของฟรุนด์ลิช (Freundlich adsorption isotherm) มาใช้ ทำนายผลการทดลองพบว่าสมการไอโซเทอร์มการดูดซับทั้ง 2 สมการ สามารถใช้ทำนายผลการทดลองได้ดี ค่า K_F ที่สูง แสดงให้เห็นถึงความสามารถในการดูดซับไอออน ตะกั่ว ของตะกอนจุลินทรีย์ทั้ง 3 ชนิดสูง ส่วนปริมาณไอออนโลหะหนักตะกั่วที่ถูกดูดซับสูงสุด (q_m) ของ AS-P, MUR-P และ CASS-N ที่ได้จากสมการไอโซเทอร์มการดูดซับของแลงเมียร์ มีค่าเป็น 253, 248 และ 247 มิลลิกรัมโลหะต่อกรัมวัสดุดูดซับ ตามลำดับ

พฤติกรรมการเคลื่อนที่ของอาร์เซนิคในชั้นน้ำใต้ดิน, กิตติพงษ์ นิลบุตร, ธนัชพร อยู่ยั่งยืน, เขมรัฐ โอสถาพันธุ์, สุธา ขาวเธียร

Applied Environmental Research

งานวิจัยนี้เป็นศึกษาพฤติกรรมการ เคลื่อนที่ของอาร์เซนิคในรูปของอาร์เซไนท์ และอาร์เซเนตในสภาวะน้ำใต้ดินโดยทำการ ทดลองกับดินตัวอย่าง 3 กลุ่มดิน คือ ดินร่วนเหนียวปนทราย ดินร่วนเหนียว และ ดินร่วนปนทราย ที่ pH 4, 7 และ 10 และ ในสภาวะที่มีไอออนลบฟอสเฟตอยู่ร่วมด้วย โดยทำการทดลองแบบต่อเนื่องโดยให้สาร ละลายอาร์เซนิคไหลผ่านคอลัมภ์ดินในทิศทางไหลขึ้นที่อัตราเร็ว 15 มิลลิลิตรต่อชั่วโมง จากการทดลองพบว่าอาร์เซไนท์สามารถเคลื่อนที่ได้เร็วที่สุดในดินทรายร่วน รองลงมาคือในดินร่วนเหนียวปนทราย และ ช้าที่สุดในดินร่วนเหนียว และเมื่อมีไอออนฟอสเฟตร่วมด้วยในสารละลาย พบว่า ไอออนฟอสเฟตทำให้การเคลื่อนที่ของอาร์เซไนท์ผ่านคอลัมภ์ดินเร็วขึ้นมาก สำหรับ การเคลื่อนที่ของอาร์เซเนต อาร์เซเนต สามารถเคลื่อนที่ได้ช้าที่สุดผ่านคอลัมน์ดินร่วนเหนียวปนทราย และคอลัมน์ที่มีไอออนลบพบว่าฟอสเฟตทำให้การเคลื่อนที่ ของอาร์เซเนตผ่านคอลัมภ์ดินเร็วขึ้นมากและเมื่อเปรียบเทียบระหว่างอารีเซไนท์และอาร์เซเนต พบว่าที่ pH 4 ความเร็วในการเคลื่อนที่ผ่านคอลัมภ์ดินร่วนเหนียวใกล้เคียง กัน แต่ที่พีเอช 7 และ ไ0 พบว่า อารีเซไนท์เคลื่อนที่ได้ช้ากว่าอารีเซเนต

ผลกระทบของเอทานอลต่อสภาพการละลายน้ำของสารอะโรมาติกไฮโดรคาร์บอน, อุสารัตน์ ถาวรชัยสิทธิ์, กลิ่นสุคนธ์ สุวรรณรัตน์, พัชรินทร์ วัชรสุขกิจไพศาล, ยุพดี บรรจงกิจ, สุวัฒน์ สูงเลิศส่งฟ้า

Applied Environmental Research

งานวิจัยนี้ได้ทำการศึกษาถึงผลของเอทานอลต่อความสามารถในการละลายน้ำของสารโมโนอะโรมาติกไฮโดรคาร์บอนใน กลุ่ม BTEX ซึ่งประกอบด้วยเบนซีนโทลูอีน เอทิลเบนซีน และไซลีนทั้ง 3 ไอโซเมอร์ทำการทดลองโดยเพิ่มอัตราส่วนโดยปริมาตรของเอทานอลในสารละลายผสมระหว่างสารไฮโดรคาร์บอนบริสุทธิ์ น้ำ และ เอทานอลให้มีค่าจาก 0% เป็น 25% ตามลำดับ พบว่าความเข้มข้นของ BTEX ในชั้นน้ำมีแนวโน้มเพิ่มขึ้นเมื่อปริมาณของเอทานอลในระบบมีค่าเพิ่มขึ้นจาก 0% เป็น 25% โดยเปอร์เซ็นต์การละลายน้ำมีค่าสูงขึ้นถึง 73%, 120%, 140%, 151%, และ 166 %สำหรับเบนซีน โทลูอีน เอทิลเบนซีน ไซลีน (meta+para) และไซลีน (ortho) ตาม ลำดับ เมื่อพิจารณาเปอร์เซ็นต์การเพิ่มขึ้น ของสภาพการละลายน้ำสำหรับสารแต่ละตัวในกลุ่ม BTEX ในสภาวะที่มีเอทานอลเทียบกับสภาพการละลายน้ำในสภาวะที่ไม่มีเอทานอล พบว่าเปอร์เซ็นต์การละลายน้ำที่เพิ่มขึ้นแปรผกผันกับขนาดของ โมเลกุล ดังจะเห็นได้จากเปอร์เซนต์การเพิ่มขึ้นของค่าการละลายน้ำในสภาวะที่มีเอทานอลเป็นตัวทำละลายร่วมในระบบสำหรับไซลีนทั้งสามไอโซเมอร์และเอทิล เบนซีนมีค่าใกล้เคียงกัน แต่มีค่ามากกว่าโทลูอีนและเบนซีน ตามลำดับ ผลงานวิจัยแสดงให้เห็นว่าเอทานอลสามารถเพิ่ม ปริมาณการปนเปื้อนของ BTEX ในน้ำผิวดินและน้ำใต้ดิน ในกรณีที่มีการรั่วไหลของ แก๊สโซฮอล์หรือการรั่วไหลของเอทานอล ร่วมกับ BTEX ลงสู่น้ำผิวดินหรือน้ำใต้ดิน

Black Ecological Care: Conservation, Environmental Justice, And Sovereignty In Baltimore, Maryland, Alexandria Nicole Casteel

Dartmouth College Ph.D Dissertations

Dominant traditions of urban planning, municipal policy, and environmental science register Black urban spaces through a vocabulary of pathology, as sites of ecological deficit, contamination, and social decay. This dissertation investigates how Black communities in U.S. cities attend to the environment in ways that address legacies of environmental and social injustice while opening pathways toward different environmental futures. I gather these practices under the analytic of Black ecological care, which captures the generative labor of making and maintaining livable worlds within, alongside, and beyond histories of harm. I develop the analytic across twenty-nine months of ethnographic fieldwork in 2021 and …

Factors Affecting Diet Selection In Sheep Fed Endophyte-Infected Toxic Fescue, Jordan Thomas, Ronelson Stinfil, Kenneth P. Coffey, Christine C. Nieman, Derico Setyabrata, Shawna Weimer

Discovery, The Student Journal of Dale Bumpers College of Agricultural, Food and Life Sciences

Tall fescue (Lolium arundinaceum (Schreb.) S.J. Darbyshire) infected with toxin‑producing fungi can induce fescue toxicosis in grazing ruminants, reducing performance and altering forage intake. Chemical compounds in red clover (Trifolium pratense), such as biochanin A, have been proposed to mitigate these effects by improving palatability and blood vessel relaxation. This study examined whether the inclusion of ground red clover (GRC), either alone or in combination with hydroxypropyl methylcellulose (HPMC) and polyethylene glycol (PEG), affected voluntary diet selection in lambs offered toxic fescue. Thirty‑three lambs were housed individually and assigned randomly to one of four diets: (1) toxic …