Download or read book Background Level of Metals in St Lawrence River Sediments written by Isabelle Saulnier and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Background Contaminant Levels in Preindustrial Sediments of the St Lawrence River written by Isabelle Saulnier and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Preindustrial marine clays, often dredged in the maritime seaway, represent a concern for the environment management as they are considered potentially toxic with regards of the sediment quality criteria. A research project was initiated in 1999, at the St. Lawrence Centre, to better document the background levels of target chemicals in these "uncontaminated" sediments. The results highlight the association of Cr and Ni to the inert silicate fraction of marine clay sediments, whereas Cd, Pb, Zn as well as Cd and Hg display generally an affinity towards more reactive phases of the sediment. The latter trace metals in these sediments are not an issue for dredged material management as their levels are always close to the no-effect level. Future results will include normalization of trace metal concentrations with organic carbon content, grain size distribution and conservative elements such as Al and Li, for a better application of the criteria to preindustrial marine clays.
Download or read book Desorption Through Elutriation of Heavy Metals from Contaminated St Lawrence River Sediments written by and published by . This book was released on with total page 3 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Geochemistry and Distribution of Metals in Radiodated Sediment Cores from Lake St Louis St Lawrence River written by Alena Mudroch and published by . This book was released on 1988 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Contaminants in Bottom Sediments of the St Lawrence River in June 1975 written by K. W. Kuntz and published by . This book was released on 1988 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: Results from a survey of bottom sediments conducted at 59 stations along the international section of the St. Lawrence River between Lake Ontario and the Quebec border in June 1975 are discussed. Summaries of trace organic and trace metal data are compared with various criteria, and possible municipal, industrial, and tributary sources of contaminants are identified.
Download or read book Microbial Responses to Trace Metals and Nutrients in the St Lawrence River written by Salem S. Rao and published by . This book was released on 1986 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt: "This study provides information on sediment bacterial responses to the in-situ sediment pollutants in Lake St. Louis in the St. Lawrence River, spatial distributions possibly indicating sources and contaminant sinks. The study provides information on the usefulness of microbial communities to evaluate the nature and extent of sediment pollutants in an aquatic ecosystem. The data summarized in this report provide information on the relationship between microbial populations and the concentrations of trace elements in sediments in Lac St. Louis, St. Lawrence River. The information is useful for the evaluation of the response of microbial processes in aquatic sediments to pollutants"--Executive summary.
Download or read book Metal Concentrations in Littoral Sediments and Aquatic Macroinvertebrates in the St Lawrence River Near Cornwall Ontario written by Alain Filion and published by . This book was released on 1997 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book St Lawrence River Sediment Sampling Program written by Woodward-Clyde Consultants and published by . This book was released on 1989 with total page 1000 pages. Available in PDF, EPUB and Kindle. Book excerpt: Part of a broader investigation of soils and water contamination at the Reynolds Metals plant at Massena, New York. This phase of the overall program focus on potential PCB contamination of St. Lawrence river sediments from the plant outfalls. Objectives are: 1) Determine the verticla and horizontal distribution of PCBs in sediment adjacent of plant outfalls; 2) Characterize the chemical form of the PCBs found in the sediments; 3) Assess the relative importance of each of the four outfalls as past or present PCB sources; 4) Assess the potential for PCB contamination of this section of the river from upstream and downstream sources other than the Reynolds plant; 5) Characterize the important modes for PCB dispersion within the river sediments adjacent to plant.
Download or read book Oceanography of a Large Scale Estuarine System written by Mohammed I. El-Sabh and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 444 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is the first book for over twenty years on the physical, biological, chemical and geological characteristics of a large-scale estuary. Interdisciplinary, concise and cohesive, it is applicable as a model for worldwide estuary study. From the contents: Mathematical Modeling of Tides in the St. Lawrence Estuary.- Fronts and Mesoscale Features in the St. Lawrence Estuary.- Nearshore Sediment Dynamics in the St. Lawrence Estuary.- Organic Geochemical Studies in the St. Lawrence Estuary.
Download or read book Heavy Metals in the Marine Environment written by Robert W. Furness and published by CRC Press. This book was released on 2018-01-18 with total page 262 pages. Available in PDF, EPUB and Kindle. Book excerpt: The aim of this volume is to draw together state-of-the-art reviews of knowledge onlevels of heavy metals in marine environments (particularly in marine animals), the dynamicprocesses in these systems, toxic effects, and threats presented by heavy metals in foods ofmarine origin.All heavy metals, whether biologically essential or not, have the potential to be toxicto organisms at a threshold bioavailability. Such threshold concentrations vary betweenmetals, between species and with the physicochemical characteristics of the medium, somelike copper being particularly toxic even though essential in trace amounts. Responses ofanimals to metals in their medium or food depend to a large extent on the ability of speciesto regulate levels attained in their tissues. Higher animals have the capacity to regulate levelsof many metals, while marine invertebrates can regulate some within certain limits. Whereanimals cannot regulate physiological levels of metals, an alternative strategy is to detoxifyand store metals in relatively harmless forms. Knowledge of the manner in which animals deal with potentially toxic concentrations of heavy metals is of fundamental importance in the assessment of metal pollution by analysis of metal levels in biological samples. The interaction of heavy metals with biological materials is a key theme running through this volume. Toxic effects may be reflected at the individual, population, or ecosystem level, affecting species composition and production levels, or may be of direct dietary significance to man. The global cycling of metals through the marine environment is crucially affected by biological processes.
Download or read book Metal Concentrations in Littoral Sediments and Aquatic Macroinvertebrates in the St Lawrence River Near Cornwall Ontario written by and published by . This book was released on 1997 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Data and Statistical Summaries of Background Concentrations of Metals in Soils and Streambed Sediments in Part of Big Soos Creek Drainage Basin King County Washington written by and published by . This book was released on 1995 with total page 114 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Effect of Colloidal Particulate Matter on the Transport and Fate of Heavy Metals in the St Lawrence River Phase I written by and published by . This book was released on 1991 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt: Elements in the experimental protocol, covering definition of sediments, properties and parameters to be defined for each sediment, definition of contaminants, preparation of suspensions, selected concentrations of suspended particulate matter, selected contaminant concentrations, preparation of clean sediments and colloidal suspensions, background concentration, nomenclature, construction of reference isotherms and additional isotherms, calculation of the quantities of clean sediment needed, and interpretation of results.
Download or read book Sediment Quality and Dredging Activities in the St Lawrence River written by Lucie Olivier and published by . This book was released on 1993 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report is an evaluation of the sediment quality of the St. Lawrence River. Where possible, trends in changes that may have occurred between 1976 and 1989 have been determined. Seven metals were focused on: cadmium, chromium, copper, mercury, nickel, lead and zinc. Sites at which heavy metals were the highest are identified and, whenever possible, related to toxic inflows from the River's international section, priority industries, tributaries and riverside municipalies.
Download or read book Estuaries written by Peter J. Wangersky and published by Springer Science & Business Media. This book was released on 2006-01-10 with total page 338 pages. Available in PDF, EPUB and Kindle. Book excerpt: Aspects of the biogeochemistry of estuaries from a variety of environments, from the tropics to the Arctic, are discussed. In most cases the courses of these rivers have been altered by dams or diversions; the results of these changes on the nature of the estuary are also discussed, where such data is available. In the case of the Tasmanian rivers, the estuary of the Huon, a largely untouched river, is contrasted with that of the Derwent, a river heavily influenced by industry. The future state of all of these estuaries may be a sensitive indicator of shifts in global weather patterns.
Download or read book Geological Survey Professional Paper written by Geological Survey (U.S.) and published by . This book was released on 1980 with total page 510 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Iroquois and Tennessee Gas Transmission Pipeline Project Construction and Operation written by and published by . This book was released on 1990 with total page 594 pages. Available in PDF, EPUB and Kindle. Book excerpt:
