Download or read book Interlaboratory Study No G 3 written by and published by . This book was released on 1994 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Interlaboratory Study No G 2 written by Alfred S. Y. Chau and published by . This book was released on 1994 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Interlaboratory Study No G 1 written by W. C. Li and published by . This book was released on with total page 19 pages. Available in PDF, EPUB and Kindle. Book excerpt: As part of quality assurance/quality control (QA/QC) program for sediments under the auspices of the Great Lakes Action Plan (GLAP), an interlaboratory study (G-1) for the analysis of selected chlorinated hydrocarbons in sediments was designed and conducted. Twenty-six laboratories were sent seven test samples including two standard solutions and five naturally contaminated sediments. Each laboratory was requested to analyze the three selected chlorinated hydrocarbons, namely, hexachlorobutadiene (HCBD), hexachlorobenzene (HCB) and octachlorostyrene (OCS) in all test samples. This report provides more information on the data evaluation and laboratory performance of participants.
Download or read book Analysis of Selected Chlorinated Hydrocarbons in Sediments written by and published by . This book was released on 1991 with total page 55 pages. Available in PDF, EPUB and Kindle. Book excerpt: As part of a quality assurance/quality control (QA/QC) program for sediments under the auspices of the Great Lakes Action Plan, an interlaboratory study for the analysis of selected chlorinated hydrocarbons in sediments was designed and conducted. Twenty-six laboratories were sent seven test samples, including two standard solutions and five naturally contaminated sediments. Each laboratory was requested to analyze hexachlorobutadiene (HBCD), hexachlorobenzene (HCB), and octachlorostyrene (OCS) in all test samples. Sixteen out of the 26 laboratories submitted results.
Download or read book Analysis of Residual Chlorinated Hydrocarbons Aromatic Hydrocarbons and Related Compounds in Selected Sources Sinks and Biota of the New York Bight written by and published by . This book was released on 1981 with total page 142 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Analysis of Heavy Metals and Chlorinated Hydrocarbons in Newport Bay Sediments written by Harlan Schroth and published by . This book was released on 1972 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Environmental Effects of Chlorinated Hydrocarbons from Chlorine Bleacheries written by G. E. Carlberg and published by . This book was released on 1981 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Bioavailability of Selected Trace Metals and Chlorinated Hydrocarbons from Sediments written by W. C. De Kock and published by . This book was released on 1982 with total page 178 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Bioavailability of Selected Trace Metals and Chlorinated Hydrocarbons Froms Sediments written by W. Chr. de Kock and published by . This book was released on 1982 with total page 178 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Study of the Mechanism of the Adsorption of Chlorinated Hydrocarbons in Marine Sediments written by Richard H. Pierce and published by . This book was released on 1973 with total page 198 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Distributions and Diagenesis of Chlorinated Hydrocarbons in Sediments written by Paul David Capel and published by . This book was released on 1986 with total page 418 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Chlorinated Hydrocarbons in Sediments of the Elbe Catchment Area written by Jürgen Gandrass and published by . This book was released on 1996 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Head space Analysis of Readily Volatile Chlorinated Hydrocarbons in Air and Water written by H. Hellmann and published by . This book was released on 1988 with total page 17 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Degradation of Select Chlorinated Hydrocarbons by i Sulfide treated Hydrous Ferric Oxide HFO and ii Hydroxyl Radicals Produced in the Dark by Oxygenation of Sodium Dithionite reduced HFO written by Dhurba Raj Pandey and published by . This book was released on 2018 with total page 67 pages. Available in PDF, EPUB and Kindle. Book excerpt: A previous work demonstrated that sulfide-treated iron oxides (goethite, hematite, and magnetite) may not show reductive pathways with carbon tetrachloride (CT) as observed with lab-precipitated iron sulfide. We examined the kinetics and products of reaction of sulfide-treated hydrous ferric oxide (HFO) towards select chlorinated hydrocarbons in batch reactors with HFO: HS- molar ratio of 1:1.5 at pH 7. CT, 1,1,2-trichlroethane (1,1,2-TeCA), 1,1,1,2-tetrachloroethane (1,1,1,2-TeCA) and 1,1,2,2-tetrachloroethane (1,1,2,2-TeCA) showed faster kinetics whereas chloroform (CF) showed slower kinetics. Trichloroethene (TCE) degradation was observed at three pHs: 7, 8 and 10; the loss in the reactors were not much different from controls at pH 7, 8 and 10. The degradation products of 1,1,2-TCA (1,1-DCE, 33%), 1,1,1,2-TeCA (TCE, 29%), and 1,1,2,2-TeCA (TCE1̃00%) suggest dehydrohalogenation to be the major pathway. The degradation product of CT (4% CF; hydrogenolysis) and 1,1,1,2-TeCA (4% 1,1 DCE; ß elimination) shows reduction to be a minor pathway. This suggests that unlike the lab-precipitated FeS, formed by reaction of Fe (II) and HS-, reduction may not be a major pathway for sulfide-treated HFO. Recent studies identified a light independent pathway for generation of hydroxyl radicals in which hydroxyl radicals are produced during O2 reduction by electron donors such as Fe (II) and DOC. Most studies have focused on hydroxyl radical production from reduced structural Fe (II) in clays and sediments. Study of reduced iron oxide in this respect remains largely uninvestigated. In this part of the research, hydrous ferric oxide (HFO) was reduced by sodium dithionite (SD) and the resulting phase was oxygenated in the dark. This bench scale study shows the age of the phase formed by SD reduced HFO did not affect the rates of cis-1,2-DCE degradation. kobs1 of cis-1,2-DCE degradation did not depend on the initial amount of cis-1,2-DCE. kobs1 of cis-1,2-DCE degradation increased non-proportionately with increase in the concentration of dithionite. Effect on cis-1,2-DCE degradation rates were investigated at three HFO:SD molar ratios: 9.4:1, 4.7:1 and 2.4:1 (SD concentration is increasing by a factor of 2̃ successively); The ratios of kobs1 were 1:10.8:13.8 (normalized to kobs1 of 9.4:1) for these three ratios respectively indicating a magnitude of order increase between 9.4:1 to 4.7:1 while it increased by 1.27 times between two higher ratios 4.7:1 to 2.4:1.Observed order of kobs1 was :1,1-DCE >TCE > PCE > cis-1,2-DCE > trans-1,2-DCE and ethene. The reactivity increased with decreasing number of chlorine substituents for 1,1-DCE >TCE> PCE and may be explained based on strong inductive effect exerted by chlorine atoms. Surprisingly, ethene with no chlorine substituents showed the least reactivity. The ratio of rate constants observed are consistent to that observed with hydroxyl radicals generated from other methods. The order for DCE isomers 1,1-DCE> cis-1,2-DCE > trans-1,2-DCE may be explained based on position of the chlorine substituents.
Download or read book Trace Metals and Chlorinated Hydrocarbons in the Sediments of a Metropolitan Watershed written by Hall, K. J and published by Vancouver, B.C. : Westwater Research Centre, University of British Columbia. This book was released on 1976 with total page 74 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Methods of Analysis for Chlorinated Hydrocarbons in Marine and Other Samples written by C. R. Allchin and published by . This book was released on 1989 with total page 25 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Methods of Analysis for Chlorinated Hydrocarbons in Marineandother Samples written by C. R. Allchin and published by . This book was released on 1989 with total page 25 pages. Available in PDF, EPUB and Kindle. Book excerpt:
