Author : Neil A. Stewart
Publisher :
ISBN 13 :
Total Pages : 57 pages
Book Rating : 4.:/5 (119 download)
Book Synopsis Reaction Rates for the Dehalogenation of Trichloroethylene Using Various Types of Zero-valent Iron by : Neil A. Stewart
Download or read book Reaction Rates for the Dehalogenation of Trichloroethylene Using Various Types of Zero-valent Iron written by Neil A. Stewart and published by . This book was released on 2005 with total page 57 pages. Available in PDF, EPUB and Kindle. Book excerpt: The data obtained produced linear first order rate plots from which dehalogenation rate constants were obtained. The rate constants were normalized by iron mass, solution volume, and surface area. The pretreatment techniques employed in this study, including ultrasonication and acid washing, demonstrated a beneficial effect by removing oxide precipitates from the iron surface, thus increasing the reactivity of the iron. Mass loading studies revealed how physical factors, associated with the experimental setup, could influence reaction rates. Surface area studies confirmed that the smaller iron particles, such as the nanoscale iron, have a greater surface area per unit mass. The large mass and volume normalized rate constant, k[subscript MV], obtained for the nanoscale iron was a result of this high surface area. However, the calculated surface area normalized rate constant, k[subscript SA], for the nanoscale iron was significantly lower than those for the granular iron samples tested. It was concluded that differences in surface area normalized rate constants, between different iron particle types, could be attributed to inherent characteristics of the iron, such as composition and crystal structure.