Thesis--PlanB (M.S.)--University of Wisconsin--Stout, 2000. / Includes bibliographical references.

Hot water discharges and potential chemical spills are factors that threaten water quality in cooling reservoirs of chemical and power plants. In this thesis, three models are used to analyze the impact of these factors in a particular case study.

An estimated 90% of resident sculpin (Cottus asper and C. aleuticus) were impacted by a spill of 45,000 litres of sodium hydroxide, which occurred on the Cheakamus River, British Columbia on August 5, 2005. This study examined sculpin biology, life history, how sculpins are recovering from the impact, and whether they are re-entering the Cheakamus River from the adjacent Squamish and Mamquam Rivers. Sculpins were sampled in the three river systems via minnow trapping and electrofishing. Morphometric data were recorded and fin clips were taken as deoxyribonucleic acid vouchers to validate field species identification and to determine population distinctiveness among the three systems. Populations were not distinct, suggesting recolonization from other rivers is occurring. The data show sculpins will undergo seasonal downstream spawning migrations and also suggest sculpins are opportunistic habitat colonizers. This research bears useful implications for the adaptive management, recovery, and sustainability of sculpins in the Cheakamus River.

Thesis (M.Sc. (Chemistry)) -- University of Limpopo, 2021 / The present research work deals with the study of some of the important physicochemical parameters of restaurant wastewater effluents collected from Mankweng business centre along the University of Limpopo road. Studies revealed that restaurants, food preparation facilities, engineering, paper mill, fine chemical, dyes, paint, pharmaceutical, petrochemical and textile industries are some of the major industries responsible for polluting the aquatic environments. This research attempts to review the physical, chemical, and microbial analysis of wastewater from food service establishments (FSEs) and extraction of fats, oil, and grease (FOG) and its characterization using different analytical techniques. The elemental analysis revealed that the concentration of elements such as zinc, lead and manganese were 6.44 mg/L, 0.02 mg/L and 0.53 mg/L, respectively. The concentration of these elements was above the required South African National Standards 241 (SANS241) limit, that is, ≤5mg/L, ≤0.01mg/L and ≤0.4mg/L for Zn, Pb and Mn, respectively. The elevated concentrations may be due to corrosion, acidic pH found in some samples and high organic load. High organic content in wastewater influenced the production of oxygen by microorganisms in-order to degrade the amount of waste in the wastewater and this has led to high chemical oxygen demand (COD) level ranging from 1784-7196 mg/L and biochemical oxygen demand (BOD5) from 1101.32 to 3222.32 mg/L. The study has demonstrated that the wastewater samples are contaminated with faecal coliforms because the concentration of microbes Escherichia Coli (E.coli) with a Most Probable Number (MPN) >200.5 in most samples, P. aeruginosa, Pseudomonas spp. were too numerous to count (TNC) and total coliforms at the highest concentration of 9.1x103 CFU/ml which was influenced by change in pH of the wastewater, the FOG content consists of both triglycerides and acrolein. The overall results highlight the discharge of highly polluted wastewater effluent, these FSE have resulted in pollution of nearby rivers thereby affecting the growth of vegetation and aquatic life. The results of the present investigation point out the need to implement common objectives, compatible policies, and programmes for improvement in the FSEs wastewater treatment methods. / National Research Foundation and Sasol-Inzalo Foundation

Every year thousands of tons of chemicals are transported by railroad in Delaware County, Indiana. All the rail lines pass through the geographical center of Muncie. Because of population densities close to rail lines is high, the vulnerability is substantial for any kind of chemical spill.To respond to possible emergency problems, the latest technology is needed which can be used in the most efficient and fastest way, so that lives can be protected. GIS can provide detailed, and time sensitive information before and after the disaster, thereby increasing the ability to make better decisions during the time of emergency.According to Gosnell (2004), the Emergency Management Agency of Delaware County is least prepared for any kind of action plan if a chemical spill situation occurs. This research is intended to create an Emergency Management System for a hypothetical chemical spill involving all the five phases of operation using GIS so that it can be a demonstration for the emergency management agency of Delaware County of how such a situation can be planned from its initial stage to final stage of operation thereby the life, property and environment can be protected. / Department of Geography