Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 27 for “"water pollution control"”.
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Uncertainty and the markets for water pollution control
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 1994.
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Empirical investigation of water pollution control through use of Phragmites australis
This research study addresses a problem of water pollution caused by heavy and toxic metals Cd, Cr, Cu and Pb. The thesis proposes the use of the technique of phytoremediation using Phragmites australis (PA) plants that have the capacity to absorb and to accumulate such metals in their roots and …
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Economic Instruments for Water Pollution Control Policy making issues: Experiences from Colombia
As part of the pollution control effort several developing countries have established economic-based initiatives to improve environmental quality. In this study the Colombian water pollution charge, which was implemented in 1997, is analyzed. The two key questions that this study attempts to answer …
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Political crisis and the politics of water pollution control in the 1970s
… government amended the 1972 act. The Federal Water Pollution Control Act Amendments of 1977 extended industrial compliance deadlines for meeting the national water quality standards and weakened the implementation of provisions that encouraged public participation. Although the federal state …
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Institutional and Community Factors Affecting Intergovernmental Cooperation: Implementing the Regionalization Policy in Water Pollution Control
Made available in DSpace on 2014-12-13T20:21:48Z (GMT). No. of bitstreams: 1 8009085.pdf: 7105054 bytes, checksum: 11eff0739f64de66fc464581a390a59e (MD5) Previous issue date: 1979
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Bioreactor-biochar (B2) treatment system: A novel design for efficient water pollution control from agri-drainage
… edge-of-field technology that enables the control of water pollution from tile drainage using woodchip bioreactor and biochar systems. In this study, the engineering potential of designer biochar pellets for dissolved reactive phosphorus (DRP)loss reduction from an intensified tile-drain …
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Low flow mixing in open channels
In problems involving water quality and pollution in natural streams under low flow conditions, during which pollution problems are most acute, a complete understanding of the effects of variations of flow and channel geometry on mixing and transport of polluted releases is necessary to establish …
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Negative phototaxis of mosquito larvae as a potential tool in the rapid biological monitoring of aquatic wastes (Diptera: Culicidae)
… for rapid methods applicable to the field of water pollution control. Zinc and copper were the toxicants tested. All tests were conducted with a standard "synthetic" dilution water. A mosquito colony was established to provide a uniform supply of test larvae. Preliminary tests were performed …
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Effectiveness of State Developed and Implemented Forestry Best Management Practices in the United States
The passage of the Federal Water Pollution Control Act of 1972 required states to develop forestry BMPs to help reduce potential nonpoint source pollution from forest operations. Properly applied forestry best management practices (BMPs) have since been proven to protect water quality from forest …
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Accuracy investigations of Parshall flumes and propeller meters
The City of Las Vegas Water Pollution Control Facility treats about 45 million gallons of municipal wastewater per day. Since effluent flow measurement commenced in 1991, measured outflow of water from the facility has often exceeded measured inflow, a physical impossibility. The discharged flow to …
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Understanding the role of trading in water quality management : based on U.S. experience
… demonstrates an overview of the performance of water quality trading programs currently implemented within the U.S. The role of trading in water quality management is identified through systematical comparisons of all possible aspects related to trading process, structure, and scale of existing …
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Effects of Forested Streamside Management Zone Widths and Thinning on Carbon Dynamics and Benthic Macroinvertebrates for Pine Plantations in the Piedmont of Virginia
To protect the integrity of the United State's waters, the Federal Water Pollution Control Act of 1972 promoted the establishment of Best Management Practices (BMPs) for forestry. A commonly used BMP is the reservation of Streamside Management Zones (SMZs). In this study the effectiveness of three …
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The Swift Water Place: Water Quality, Fish Ecology, and Hydropower in the Merrimack River since the Time of Thoreau
… into a landscape that was shifting towards water-powered industries and mill cities. The legal transformation of water and the completion of the Great Stone Dam at Lawrence in 1847 spelled the end of the anadromous fish runs that had populated the Merrimack for centuries. Salmon restoration …
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Water Quality Spatial Heterogeneity in Wastewater Stabilization Ponds at Elevated pH
… to elevated pH in secondary facultative wastewater stabilization ponds (WSPs). Loyalist Township, Ontario, operates a water pollution control plant that employs three facultative WSPs that have experienced elevated pH levels in the summer months due to excessive algae growth. In efforts to …
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Implementing environmental policy in Scotland: an analysis of water pollution regulation and government support for the voluntary environmental sector.
… it examines the implementation of regulatory water pollution control policy by one of Scotland's former River Purification Boards (RPBs) through the policy instrument of the Control of Pollution Act 1974 (COPA 1974). The thesis also examines The Scottish Office's implementation of distributive …
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Volatile fatty acid production during thermophilic aerobic digestion pre-treatment
… obtained from the City of Winnipeg's North End Water Pollution Control Centre. VFAs accumulated under all oxygen-deprived conditions (O$\sb2$ flow rate: 0.025 $\rm m\sp3/m\sp3\cdot h;$ ORP: $-$330 mV to $-$390 mV) and the production rate increased with increasing retention time from 0.029 mg …
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A preliminary investigation of the potential for deep well waste disposal
The 1972 amendments to the Federal Water Pollution Control Act provide for major changes to reduce and eventually eliminate water pollution by 1985. In contrast, projections indicate that the volume of wastes generated by population and economic growth in the near future will be very large and the …
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Using Free Water Surface Constructed Wetland for the Mitigation of High PH Secondary Effluent From Municipal Wastewater Treatment Plant
Wastewater stabilization ponds (WSPs) are considered to be the most sustainable technology for small, rural and remote communities in North America. However, due to the configuration of WSPs and limited control over these systems, performance concerns during certain parts of the year may arise, as …
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Dissolved Organic Matter Characterization and Impact on Mercury Binding in an Urbanizing Watershed
… in aquatic ecosystems, interacting with and controlling the bioavailability and transport of mercury (Hg) and other trace metals through complexation. The complexation of ionic Hg (Hg<sup>2+</sup>) with DOM can either limit methyl mercury (MeHg) bioavailability or increase MeHg production by …
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Understanding Structure-Property Relationships for Palladium-Gold Nanoparticles as Colloidal Catalysts
… on the structureproperty relationships in water-phase reactions, using hydro dechlorination (HDC) of trichloroethene (TCE) as the model reaction. Catalyzed TCE HDC is a potential approach for water pollution control, in which colloidal Pd-decorated Au NPs (Pdf Au NPs) are known to be …
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