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Full-Text Articles in Engineering
Drinking Water Infrastructure Assessment With Teleconnection Signals, Satellite Data Fusion And Mining, Sanaz Imen
Drinking Water Infrastructure Assessment With Teleconnection Signals, Satellite Data Fusion And Mining, Sanaz Imen
Electronic Theses and Dissertations
Adjustment of the drinking water treatment process as a simultaneous response to climate variations and water quality impact has been a grand challenge in water resource management in recent years. This desired and preferred capability depends on timely and quantitative knowledge to monitor the quality and availability of water. This issue is of great importance for the largest reservoir in the United States, Lake Mead, which is located in the proximity of a big metropolitan region - Las Vegas, Nevada. The water quality in Lake Mead is impaired by forest fires, soil erosion, and land use changes in nearby watersheds …
Development Of Treatment Train Techniques For The Evaluation Of Low Impact Development In Urban Regions, Mike Hardin
Development Of Treatment Train Techniques For The Evaluation Of Low Impact Development In Urban Regions, Mike Hardin
Electronic Theses and Dissertations
Stormwater runoff from urban areas is a major source of pollution to surface water bodies. The discharge of nutrients such as nitrogen and phosphorus is particularly damaging as it results in harmful algal blooms which can limit the beneficial use of a water body. Stormwater best management practices (BMPs) have been developed over the years to help address this issue. While BMPs have been investigated for years, their use has been somewhat limited due to the fact that much of the data collected is for specific applications, in specific regions, and it is unknown how these systems will perform in …
The Effects Of Bam As An Adsorptive Media On Phosphorus Removal In Stormwater, Sultan Salamah
The Effects Of Bam As An Adsorptive Media On Phosphorus Removal In Stormwater, Sultan Salamah
Electronic Theses and Dissertations
To maintain the quality of receiving water bodies, it is desirable to remove total phosphorus (TP) in stormwater runoff. Many media filtration technologies have been developed to achieve TP and soluble reactive phosphorus (SRP) removal. Efficient media adsorption is essential to insure control of stormwater phosphorus inputs to the receiving water body. This project develops and analyzes a functionalized Biosorption Media (BAM) to remove phosphorus species from stormwater runoff. One goal of this project is to find the BAM values for coefficients such as maximum adsorption capacity (QM: 4.35E-05) for the media through SRP isotherm equilibrium experiments using the Langmuir …
The Effects Of Phosphate And Silicate Inhibitors On Surface Roughness And Copper Release In Water Distribution Systems, David Macnevin
The Effects Of Phosphate And Silicate Inhibitors On Surface Roughness And Copper Release In Water Distribution Systems, David Macnevin
Electronic Theses and Dissertations
The effects of corrosion inhibitors on water quality and the distribution system were studied. This dissertation investigates the effect of inhibitors on iron surface roughness, copper surface roughness, and copper release. Corrosion inhibitors included blended poly/ortho phosphate, sodium orthophosphate, zinc orthophosphate, and sodium silicate. These inhibitors were added to a blend of surface water, groundwater, and desalinated brackish water. Surface roughness of galvanized iron, unlined cast iron, lined cast iron, and polyvinyl chloride was measured using pipe coupons exposed for three months. Roughness of each pipe coupon was measured with an optical surface profiler before and after exposure to inhibitors. …
Impact Of Corrosion Inhibitor Blended Orthophosphate On Water Quality In Water Distribution Systems, Abdulrahman Alshehri
Impact Of Corrosion Inhibitor Blended Orthophosphate On Water Quality In Water Distribution Systems, Abdulrahman Alshehri
Electronic Theses and Dissertations
The impact of blended orthophosphate (BOP) inhibitor addition on the corrosion of iron, copper, and lead in drinking water distribution systems was studied under changing water quality environment. Release of iron, copper, and lead were monitored at varying inhibitor doses and changing blends of source waters (groundwater, surface water, and desalinated water). Solid corrosion products on pipe surfaces under BOP treatment were evaluated with surface characterization techniques. Performance of the BOP inhibitor was compared to other corrosion control strategies. Iron scales for iron and galvanized steel coupons incubated in different blended waters in the presence of BOP inhibitor were analyzed …
Reversion Of Poly-Phosphates To Ortho-Phosphates In Water Distribution Systems, Avinash Shekhar
Reversion Of Poly-Phosphates To Ortho-Phosphates In Water Distribution Systems, Avinash Shekhar
Electronic Theses and Dissertations
Orthophosphates and polyphosphates are rarely present at significant levels in raw water source but are purposefully added to the water in various forms to inhibit corrosion, iron oxidation (red water), or calcium carbonate precipitation (scale formation). Orthophosphates serve as building blocks for polyphosphates, which includes structures in linear chain, branched chains (metaphosphate) and "glassy" polyphosphate polymers. The advantage of polyphosphates over ortho phosphates lies in the fact that they slowly revert to orthophosphates and thus provide corrosion inhibition action over longer period of time in distribution systems. A study was completed for Tampa Bay Water on water distribution systems in …
The Effect Of Free Chlorine And Chloramines On Lead Release In A Distribution System, Ferdinand Vasquez
The Effect Of Free Chlorine And Chloramines On Lead Release In A Distribution System, Ferdinand Vasquez
Electronic Theses and Dissertations
Total lead release in drinking water in the presence of free chlorine and chloramine residuals was investigated in field, laboratory and fundamental investigations for finished waters produced from ground (GW), surface (SW), saline (RO) and blended (B) sources. Field investigations found more total lead was released in the presence of chloramines than in the presence of free chlorine for RO and blended finished waters; however, there were no statistical differences in total lead release to finished GW and SW. Laboratory measurements of finished waters oxidation-reduction potential (ORP) were equivalent by source and were not affected by the addition of more …
Effect Of Source Water Blending On Copper Release In Pipe Distribution System: Thermodynamic And Empirical Models, Weizhong Xiao
Effect Of Source Water Blending On Copper Release In Pipe Distribution System: Thermodynamic And Empirical Models, Weizhong Xiao
Electronic Theses and Dissertations
This dissertation focuses on copper release in drinking water. Qualitative and quantitative assessment of Cu and Fe corrosion by process water quality was assessed over one year in a field study using finished waters produced from seven different treatment process and eighteen pilot distribution systems (PDSs) that were made from unlined cast iron and galvanized steel pipes, and lined cement and PVC pipes taken from actual distribution systems. Totally seven different waters were studied, which consisted of three source waters: groundwater, surface, and simulated brackish water designated as G1, S1, and RO. With certain pre-established blending ratios, these three waters …
Speciation Of Heavy Metals In Highway Drainage Systems, Lee P. Wiseman
Speciation Of Heavy Metals In Highway Drainage Systems, Lee P. Wiseman
Retrospective Theses and Dissertations
A trace metal speciation scheme proposed by Batley and Florence (1976) was applied to determine the physiochemical forms of zinc, cadmium, lead, and copper in two Central Florida highway drainage systems. The linearity and limitations of the ASV technique were also examined. The measurements showed that (a) more than 70% of the soluble Zn and Cd in all of the waters analyzed existed as liable ionic metal (b) lead was divided between labile and non-labile inorganic forms, but one particular form, PbCO3, predominated (c) a substantial fraction of copper is associated with organic colloids if humic substances are …
The Effects Of Plain Sedimentation On The Quality Of Urban Stormwater Runoff From The Lake Eola Watershed, Victor Julius Godlewski
The Effects Of Plain Sedimentation On The Quality Of Urban Stormwater Runoff From The Lake Eola Watershed, Victor Julius Godlewski
Retrospective Theses and Dissertations
The settling characteristics of urban stormwater runoff emanating from the Lake Eola Watershed (Orlando, Florida) were evaluated through a series of 7 column studies. The percentage removal that occurred due to sedimentation was observed for various stormwater pollutants and constituents. These included the General Water Quality Parameters: Total Suspended Solids, Non-volatile Suspended Solids, Volatile Suspended Solids, Chemical Oxygen Demand, Total Kjeldahl Nitrogen, Ammonia Nitrogen, Total Organic Carbon, and Total Phosphorus. The metals parameters: Zinc, Cadmium, Arsenic, Nickel, Copper, Magnesium, Iron, Lead, Chromium and Calcium were also considered. The results of the settling analysis indicates that the quality of Lake Eola …
Treatment Process Variations To Reduce Tthm Residuals In A Finished Water, Edward L. Hatcher
Treatment Process Variations To Reduce Tthm Residuals In A Finished Water, Edward L. Hatcher
Retrospective Theses and Dissertations
This research investigates organic polymers, inorganic coagulants and separate unit operations for their effect on the total tri-halogenated (TTHM) residuals in a finished water. The water samples utilized for this project were taken from a highly colored Central Florida potable water supply which is used by municipality which has a TTHM concentration in the finished water in excess of the proposed Federal limit. Results indicate that (1) organic polymers are not a significant source of THM precursors, (2) organic polymers, when used as a settling aid after coagulation in Jar tests, are an effective means of filtration for removing THM …
Heavy Metals In The Water And Wastewater Systems Of The University Of Central Florida, William Keith Mccully
Heavy Metals In The Water And Wastewater Systems Of The University Of Central Florida, William Keith Mccully
Retrospective Theses and Dissertations
In large enough quantities, heavy metals may be detrimental to human health. Metals in raw water may pass through a water treatment plant without being completely removed. Once in a the distribution system, the water may experience metal pick-up due to corrosion. During the course of this study, an attempt was made to determine the heavy metal concentrations in the University of Central Florida's potable water systems. Samples were fun on the plasma spectrophotometer, Spectraspan III, and analyzed for heavy metal content. The results indicate pick-up of Fe, Al, Cu, and Zn in the distribution system. The arsenic and lead …
Molecular Size Distributions Of Heavy Metals In Lake Washington, William B. Andrews
Molecular Size Distributions Of Heavy Metals In Lake Washington, William B. Andrews
Retrospective Theses and Dissertations
Four untreated and one magnesium treated water samples from Lake Washington, the potable water source for the city of Melbourne, Florida, were collected and analyzed for As, Cd, Cr, Cu, Fe, Pb, Ni, Zn, Mb, Ca, and color on the basis of molecular weight distribution. Molecular weight distributions of the samples were obtained using a Millipore ultrafiltration system and filters in the following sizes: 106, 105, 2.5 x 104, 104, and 103 nominal molecular weight limits (nmwl). Color causing materials in the untreated samples were found to be located in the molecular weight fraction greater than 2.5 x 104 nmwl. …
Mass Loadings Of Selected Water Quality Parameters For The State Of Florida, Charles D. Miller
Mass Loadings Of Selected Water Quality Parameters For The State Of Florida, Charles D. Miller
Retrospective Theses and Dissertations
The mass loadings of pollutants common in surface waters result from the discharges of many different sources. In the last few years it has been noted that nonpoint sources contribute more pollutants than point sources. This is because in many cases the point source discharges have been, by law, reduced drastically. In the State of Florida many water quality parameters were examined to estimate the mass loadings in streams related to, drainage area, average flow, land use, soil type and management practices. A total of sixteen streams were examined. The information was first calculated for mass loadings as a function …
Mixing Effects On Shallow Water Bodies, Kim Robin Powell
Mixing Effects On Shallow Water Bodies, Kim Robin Powell
Retrospective Theses and Dissertations
This report is intended to examine the ecological changes due to mixing in shallow water bodies. Physical, chemical, and biological changes are reported in literature. A literature search revealed the range of mixing nodes or processes. Assessment of ecological changes due to mixing by boating activities had been evaluated in a research project supported by the environmental Protection Agency and conducted at Florida Technological University. The examination of changes due to mechanical mixing on lake ecology simulated in fifty-five gallon drums indicated the sensitivity of such parameters as total Kjeldahl nitrogen, conductivity, pH, temperature, and dissolved oxygen. Problems of reproducibility …