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.
Results
Showing 1 to 20 of 53 for “"Water Filtration"”.
-
Development of Fluidic Systems for Water Filtration and Bio-Separation
… leverages the insights to develop devices for water filtration and blood purification. In the first section, we focus on the characterization and engineering of gymnosperm xylem for developing water filters. The xylem tissue, which transports water and nutrients in plants, has nanoscale pores …
-
Trihalomethane formation in rural household water filtration systems in Haiti
Thesis (M.Eng.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 2001.
-
Self-healing properties of water filtration membranes containing amphiphilic comb polymer
(cont.) and filtration experiments, as well as other characterization techniques. Surface analysis is accomplished via x-ray photoelectron spectroscopy (XPS). Membrane samples are cleaned (in hydrogen peroxide or chromic-sulfuric acid (Chromerge)) and/or annealed (in 90⁰C deionized water), and …
-
Defining common parameters of evaluations for water filtration technologies in India
… world today do not have access to safe drinking water. With almost 3.5 million of those people dying each year, this is no longer an issue we can pretend is of little importance. Of the deaths that occur each year, 84% are those of children and 98% occur in developing countries. Many companies …
-
Characterization of amorphous silica and crystalline silica from rice husk ash on water filtration application
The presence of water pollution which consists of heavy metals, fecal and others has produced a major problem. These can lead the water to the toxicity and the impurity of water will be disrupted. Therefore, it would not be safe to drinks and could be threatening to live health. In addition, the …
-
Household-level point-of-use water filtration system in Haiti : strategies for program management and sustainability
… traditional approach of providing safe drinking water supplies through centralized large-scale systems has proven ineffective, costly, and elusive, particularly in serving the needs of rural populations in developing countries. The focus of safe water provision in developing countries is steadily …
-
Determination of low bacterial and viral concentrations in water and selective removal of pathogenic bacteria in water filtration systems
… AT AUTHOR'S REQUEST.] Pathogens in drinking water and their associated waterborne diseases are of great concern to the public health. More work related microbial detection and removal is needed. In this research, new methods using lanthanum-based chemical flocculation for concentration of …
-
I. Depolymerization-macrocyclization of (o-phenylene-ethynylene)-alt-(arylene-ethynylene) copolymers II. Improving existing water filtration membranes via covalent modification
… product distribution. II. Improving Existing Water Filtration Membranes via Covalent Modification Over a billion people in the world already have limited access to safe drinking water, and the problem is steadily growing worse due to contamination of our water supply. Therefore, we need an …
-
To Study the Effect of Catalyst on the Physical Parameters of Carbon Spheres
… has gained attention in many areas such as water filtration, hydrogen storage and battery electrodes. In this research, carbon spheres with high specific area and uniformity were grown using the Chemical Vapor Deposition (CVD) process with silicon substrates, ethylene (C2H4) as a carbon …
-
Development of xylem-based water filters
… availability of numerous commercial products for water filtration and treatment, there continues to be a need for technological solutions that can make safe drinking water affordable and accessible. Due to their low cost, high filtration rate per unit weight and the ability to be manufactured …
-
Distribution and Ecological Function of Pacific Lamprey in the San Luis Obispo Creek Watershed
… is an endemic species to coastal watersheds along the Pacific Rim in North America and Asia. The species' geographic distribution is retracting and has not been mapped precisely, and the ability for the species to provide ecosystem services, such as water filtration, for supporting …
-
Selective molecular transport in nanopore systems
… systems has the potential to revolutionize water filtration, nanofluidics, and biomolecule detection technologies. I give my characterizations of five nanopore systems as my dissertation. First, I present my study of nanopores in polyethylene terephthalate (PET), revealing the mechanism for …
-
A Comparative Analysis of Plastic Pollution Distribution in Costa del Este in Panama and Central American countries: Belize, Colombia, Costa Rica, El Salvador, Guatemala, Honduras, and Nicaragua
… shoreline protection, preventing erosion, and water filtration. However, pollution poses a significant threat. My study investigated the impacts of marine plastics, mangrove conservation practices, and waste management practices in Panama, Belize, Colombia, Costa Rica, El Salvador, Guatemala, …
-
LASER ABLATION FOR COPPER OXIDE NANOWIRES GROWTH AND ITS APPLICATION FOR OIL-WATER SEPARATION
… a key component in technologies pertaining to water treatment to minimize the damage to our ecosystem from industrial contamination. However, the continuous erosion of surfaces by its surrounding environments is an inherent challenge in ensuring lasting adhesion of nanomaterials onto surfaces …
-
Simulations of polymeric membrane formation in 2D and 3D
… membranes, which enjoy widespread use in water filtration and purification. In this work, a ternary Cahn-Hilliard formulation incorporating a Flory-Huggins homogeneous free energy function is used to model both initial diffusion and the liquid-liquid demixing stage of the immersion …
-
Exploring the social, economic, and ecological dimensions of managing marine ecosystems
… services such as biodiversity enhancement, clean water, increased fish stocks and coastal protection. Despite increasing efforts, the socio-economic impacts of conservation and restoration initiatives and the integration of adaptive strategies informed by up-to-date, evidence-based practices …
-
Characterization of manganese oxide coated porous carbon aerogel to isolate the effects of electro-less deposition time, li+ -ion exchange, and heat treatment on ion selectivity and specific capacitance
Motivated by the growing crisis of global water scarcity, this study focuses on an up and coming desalination technique. Capacitive deionization (CDI) is a novel method based on the general concept of ion electro-sorption, with two electrodes acting as capacitors [1]. When polarized in …
-
The productive landscape : wetland rehabilitation at the lower reaches of the Liesbeek River
… site works, that embodies the process of natural water filtration, using water from the Liesbeek River. Natural ecosystems are restored through the cultivation of endangered wetland plants in controlled growing beds for wetland rehabilitation on the site. Filtered water from the constructed …
-
Scalable Synthetic Trees for Transpiration-Powered Hydraulic Systems
… trees utilize hydraulic mechanisms to draw water from the soil, through their roots, and up to their leaves, sustaining hydration through transpiration. This process is reliant on the difference in relative humidity between the leaf and the ambient to promote evaporation, and synthetic trees …
-
Molecular understanding of osmosis and a multiscale framework to investigate confined fluid properties
… of life as well as technology to develop better water filtration systems depends on a fundamental understanding of osmosis. In this thesis, first, a molecular understanding of osmosis in uncharged and charged semi-permeable membranes is developed using Molecular Dynamics (MD) simulation studies. …
Page 1 of 3