Environmental Engineering Commons^™

Microscopic Characterization Of Hydrocarbon-Polyelectrolyte Interactions During Coagulation, Vesna Dimitric Clark

FIU Electronic Theses and Dissertations

The purpose of this study was to investigate effectiveness of polyelectrolyte in removal of different hydrocarbons and to obtain information on settling velocity, size and density of the floe. Image analysis technique provided multilevel data concerning interactions between hydrocarbons and polyelectrolyte. Captured images were digitized, enhanced by numerous filtering techniques and examined. Additional, video-monitoring system was used to provide information on settling velocity of the floes. Results indicated that polyelectrolyte Cat-Floc 2953, in comparison to EB-5000, was more efficient in removal of all hydrocarbons, which was supported with turbidity measurements, GS analysis and microscopic analysis.

Sorption Measurements And Behavior Of Monosodium Methanearsonate And Arsenic (+5) In Aqueous Suspensions Of Floridian Soil Fractions, George William Di Carlo

FIU Electronic Theses and Dissertations

Adsorption experiments using both monosodium methanearsonate (MSMA) and its inorganic degradation by-product species As(+5), as sodium arsenate Na₂AsO₄, were conducted to evaluate the sorptivity of these constituents to various fractions of soil samples taken from the West Palm Beach Country Club. Adsorption data were analyzed with common isotherm equations (i.e., Linear, Freundlich, Langmuir) to determine K_d for each arsenic (As) species/soil fraction. Simulations using a one-dimensional pesticide transport model, PRZM 2.0, were completed to evaluate possible dissolved concentrations of arsenic at the water table interface under 8 different application scenarios for the soil profile found …

Alternative Methods For Newborn Urine Sample Collection, Nancy Ann Burke

FIU Electronic Theses and Dissertations

This project investigated the accuracy of laboratory results of urine samples collected from cotton balls as compared with samples collected from catheterization, preemie pampers and newborn pampers. Also, it examined the cotton ball's effect on the infant's skin upon its removal. Comparisons in test results were made concerning the Directigen test for Group B strep (GBS) and labstick analysis, using descriptive and inferential statistical analysis. The infants (21) who were tested for GBS using catheter and cotton ball samples yielded the same results.

Urine samples subjected to labstick analysis were obtained from 30 infants, the urine being extracted from preemie …

Kinetic Rate Constants For The Formation Of Trihalomethanes In Chlorinated Ammonia Containing Ground Water, Lee S. Casey

FIU Electronic Theses and Dissertations

It is well established that trihalomethanes, in drinking water are byproducts of chlorine disinfection. A method to predict the distribution and concentration of trihalornethanes is important because of health risks associated with chronic exposure to these compounds. A literature review has provided information on the chemistry of water chlorination and a data base developed in the laboratory has provided data on trihalomethane formation under various conditions. These data were used to generate rate constants for the formation of trihalomethanes.

Trihalornethane formation kinetics appeared to be influenced primarily by the presence of ammonia. The influence of pH is not as profound …

Effective Energy Conservation And Management In The Building Sector : The Answer To The Energy Predicament, Jorge C. Cano

FIU Electronic Theses and Dissertations

Modern civilization has developed principally through man's harnessing of forces. For centuries man had to rely on wind, water and animal force as principal sources of power. The advent of the industrial revolution, electrification and the development of new technologies led to the application of wood, coal, gas, petroleum, and uranium to fuel new industries, produce goods and means of transportation, and generate the electrical energy which has become such an integral part of our lives.

The geometric growth in energy consumption, coupled with the world's unrestricted growth in population, has caused a disproportionate use of these limited natural resources. …