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Removal Of N-Nitrosodimethylamine And Trihalomethane Precursors With Powdered Activated Carbon, Wilson Beita Sandi
Removal Of N-Nitrosodimethylamine And Trihalomethane Precursors With Powdered Activated Carbon, Wilson Beita Sandi
All Theses
N-nitrosodimethylamine (NDMA) has been used commercially in several applications, including the production of liquid rocket fuel, and a variety of foods, but gained more relevance when it was discovered as a drinking water disinfection by-product (DBP) in 1989. NDMA is a probable human carcinogen with 10-6 lifetime cancer risk associated with a drinking water concentration of 0.7 ng/L, and is listed as a priority pollutant in the Code of Federal Regulations; no federal maximum contaminant level has been established for drinking water yet. However, the United States Environmental Protection Agency is planning to make a preliminary regulatory determination in 2013 …
The Production And Characterization Of A Multi-Functional Fiber-Based Composite For Use In Protective Clothing, Jessica Green
The Production And Characterization Of A Multi-Functional Fiber-Based Composite For Use In Protective Clothing, Jessica Green
All Dissertations
A fiber-based composite comprised of two functional components which work concurrently to adsorb toxic organic compounds was developed and characterized for use in chemical threat protective clothing. The first functional component, the sorptive layer, consists of a carded nonwoven loaded with adsorptive particles. In this layer, Capillary-Channeled PolymerTM (C-CPTM) fibers were used instead of traditional round fibers since the grooved nature of the C-CPTM fibers enables increased adsorptive particle loading. The species of adsorptive particles investigated, zeolite and modified PS, are considered as a replacement for more commonly used activated carbon spheres. The second functional component, the flow restrictive layer, …