Download or read book Dermatologica written by and published by . This book was released on 1966 with total page 520 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Inorganic Chromium VI Compounds written by World Health Organization and published by Concise International Chemical. This book was released on 2013 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This Concise International Chemical Assessment Document (CICAD) provides summaries of the relevant scientific information concerning the potential effects of these chemicals upon human health and the environment. Chromium (VI) compounds, also known as hexavalent chromium compounds, are widely produced by industrial processes. Humans can be exposed to these compounds via occupation exposure or via drinking water, and releases into the environment can also occur via waste water. This document complements CICAD Number 76 on Inorganic Chromium (III) compounds.
Download or read book Chromium VI Reagents Synthetic Applications written by S. Sundaram and published by Springer. This book was released on 2011-08-12 with total page 66 pages. Available in PDF, EPUB and Kindle. Book excerpt: Chromic acid and chromium oxide are the two versatile Cr(VI) oxidants known to organic chemists for decades. The introduction of the Core's reagent , viz: pyridinium chlorochromate, in 1975 followed by the publications on several Cr(VI) oxidizing agents containing the -onium chromates and halochromates in the last three decades have very much changed the chemistry of oxidations with Chromium VI. Several of these new reagents have been shown to be mild so that they can be handled easily and the reacton products may also be controlled. Some of them are highly selective oxidants for positions like allylic hydroxylic group, etc., and some other are highly regioselective. The information on more than 36 such reagents reported in various internationally reputed journals spanning about 280 references have been collected and provided in this book in such a manner that it will be very useful for professionals, researchers, teachers and graduate students working in organic synthesis.
Download or read book Chromium VI Handbook written by Jacques Guertin and published by CRC Press. This book was released on 2004-12-28 with total page 800 pages. Available in PDF, EPUB and Kindle. Book excerpt: Put together by a team of scientists, engineers, regulators, and lawyers, the Chromium(VI) Handbook consolidates the latest literature on this topic. The broad scope of this book fills the need for a comprehensive resource on chromium(VI), improving the knowledge of this contaminant at a time when the extent and degree of the problem is still being
Download or read book Low Level Hexavalent Chromium Treatment Options written by Philip Brandhuber and published by American Water Works Association. This book was released on 2005-07-31 with total page 214 pages. Available in PDF, EPUB and Kindle. Book excerpt: In February 1999, the California Office of Environmental Health Hazard Assessment issued a Public Health Goal (PHG) for total chromium of 2.5 μg/L. The PHG, based on a 10^6 risk level for 0.2 μg/L hexavalent chromium [Cr(VI)], was 40 times less than the USEPA's contaminant MCL of 100 μg/L for total chromium [Cr(III) ] Cr(VI)]. The success of the movie Erin Brockovich, which popularized a groundwater chromium pollution lawsuit in Hinkley, California, sensitized the public to the health hazards of chromium in drinking water. In 2001, the California state legislature passed a bill requiring the California Department of Health Services to adopt an MCL for Cr(VI). All of these actions must be viewed from the perspective that, at the time, no technology had been demonstrated to be effective at treating chromium to concentrations consistent with the total chromium PHG or the Cr(VI) 10^6 risk level of 0.2 μg/L. The purpose of this report was to present the results of this partnership study, which included an analysis of chromium occurrence and co-occurrence, an evaluation of Cr(VI) removal technologies, and an examination of chromium oxidation and reduction chemistry. This study investigated nearly all of the potential methods of controlling Cr(VI) either through the use of technologies that remove Cr(VI) directly (adsorption, anion exchange, membrane filtration) or those that remove the reduced form of chromium, Cr(III) (precipitation with membranes or coagulation and precipitation with conventional or membrane filters). These technologies were investigated using laboratory-scale testing methods, including batch isotherm tests, bench membrane systems, flow-through mini-columns, and jar testing techniques. For most technologies, controlled water matrices were used to screen performance. Selected technologies were further assessed using natural groundwater matrices from the Los Angeles Department of Water and Power and the Glendale Water and Power groundwater facilities.
Download or read book The Toxicity of Chromium and Inorganic Chromium Compounds written by S. Fairhurst and published by . This book was released on 1989 with total page 264 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Chromium written by National Research Council (U.S.). Committee on Biologic Effects of Atmospheric Pollutants and published by National Academies. This book was released on 1974 with total page 172 pages. Available in PDF, EPUB and Kindle. Book excerpt: As civilization has progressed, man has used ever greater quantities of chemicals, has learned to prepare new compounds not found in nature, and has devised many different chemical processes. These developments have led to great concern over the public-health consequences of accidental release or waste disposal of these possibly harmful chemicals into the environment. The problem has been intensified by the development of more sensitive methods of detection and analysis. Because some chromium compounds have been found to produce harmful effects in man through industrial exposures, it has become important to determine the concentrations, forms, and health effects of chromium in the ambient air. This document is the result of a critical evaluation of the literature available to the Panel on Chromium up to July 1, 1972, on the biologic and health effects of chromium. As will become apparent in the following pages, the literature does not provide conclusive answers to many of the important questions on the biologic effects of chromium. The final chapter lists categories of future research that the Panel feels warrant high priority.
Download or read book The Chemistry of Chromium Molybdenum and Tungsten written by Carl L. Rollinson and published by . This book was released on 1975 with total page 174 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Water Exchange on Aqueous Chromium III microform a Variable Pressure and Temperature Kinetic Study written by Fan-Chou Xu and published by National Library of Canada. This book was released on 1984 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Heallth Effects of Chromium VI Contamination of Drinking Water written by Deborah V. Ortiz and published by . This book was released on 2000-11-01 with total page 300 pages. Available in PDF, EPUB and Kindle. Book excerpt: Chromium VI (C6) is a source metal that is widely used for industrial purposes & has the potential to contaminate drinking water sources. Agenda includes: (1) C6 & its human health implications: research findings & unanswered questions; (2) Chromium & CA's drinking water: CA's drinking water standards, their adequacy & enforcement; extent & dist. of Chromium/C6 contamination in CA; (3) San Fernando Valley's water supply & C6: the extent & nature of C6 contamination; current efforts to manage or mitigate contamination; & potential costs & options for providing uncontaminated valley water; & (4) public policy options & recommendations for C6: related contamination sites.
