Identification of Toxic Substances in the Upper Illinois River PDF Download
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Author: Richard E. Sparks
Publisher:
ISBN:
Category : Ammonia
Languages : en
Pages : 80
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Book Description
Author: Richard E. Sparks
Publisher:
ISBN:
Category : Ammonia
Languages : en
Pages : 80
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Book Description
Author: Richard E. Sparks
Publisher:
ISBN:
Category : Ammonia
Languages : en
Pages : 40
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Book Description
Author: Richard E. Sparks
Publisher: Forgotten Books
ISBN: 9781333773304
Category : Business & Economics
Languages : en
Pages : 86
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Book Description
Excerpt from Identification of Toxic Substances in the Upper Illinois River: Final Report During the course of this study, several species of fingernail clams, includ ing M. Transversum, reappeared in the Chicago area waterways and in the Illinois River at Peoria and Havana. There are at least four possible explanations for this surprising reappearance of clams in the same general areas where the porewaters tested toxic. First, we found that clams recolonizing the upper Illinois are more resistant to ammonia than the clams from the lower Illinois, where the organisms were obtained for all of the early bioassays. Second, our previous research demon strated that the surface layers of sediment in some areas are less toxic than layers a few centimeters deeper. Toxicity may have been overestimated in tests where surface and deep layers of sediment were mixed prior to testing. Third, toxic episodes may be brief and infrequent, allowing organisms to colonize in between episodes. Fourth, the distribution of toxicity in sediments may be extremely patchy, so that healthy organisms are found adjacent to barren areas. If the latter two hypotheses prove to be true, acute toxicity in the Illinois River has changed recently from a widespread problem to a more localized or episodic problem. Reduction of toxicity in surface sediments may reflect recent reductions in ammonia loading from sewage treatment plants in the Chicago area, although it is not clear whether the sources of ammonia in the porewaters are effluents, the deeper layers of sediments, or both. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
Author: Kenneth S. Lubinski
Publisher:
ISBN:
Category : Water
Languages : en
Pages : 62
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Book Description
Author: W. Tyler Mehler
Publisher:
ISBN:
Category : Water
Languages : en
Pages : 202
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Book Description
The difficulty of assessing risk of sediment-associated contaminant mixtures to benthic ecosystems is often attributed to understanding the bioavailable fraction of each contaminant. These issues have led to the development of the toxicity identification evaluation (TIE). Past pore water TIE testing on Illinois River sediments has indicated that ammonia was the primary contaminant. The current study, however, suggests that ammonia is no longer the primary contaminant of concern, but rather non-polar organics, including polycyclic aromatic hydrocarbons, are the primary cause for toxicity in the Illinois River Complex (IRC). The study provides data that could be used in combination with previous work to more accurately characterize the sources and spatial trends of toxicity in Illinois River sediments for future risk assessment and mitigation.
Author:
Publisher:
ISBN:
Category : Illinois River (Ill.)
Languages : en
Pages : 116
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Book Description
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 708
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Author:
Publisher:
ISBN:
Category : Water resources development
Languages : en
Pages :
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Book Description
Author: Michael L. Machesky
Publisher:
ISBN:
Category : Lake sediments
Languages : en
Pages : 158
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Book Description
Author: National Research Council
Publisher: National Academies Press
ISBN: 9780309045346
Category : Technology & Engineering
Languages : en
Pages : 580
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Book Description
Aldo Leopold, father of the "land ethic," once said, "The time has come for science to busy itself with the earth itself. The first step is to reconstruct a sample of what we had to begin with." The concept he expressedâ€"restorationâ€"is defined in this comprehensive new volume that examines the prospects for repairing the damage society has done to the nation's aquatic resources: lakes, rivers and streams, and wetlands. Restoration of Aquatic Ecosystems outlines a national strategy for aquatic restoration, with practical recommendations, and features case studies of aquatic restoration activities around the country. The committee examines: Key concepts and techniques used in restoration. Common factors in successful restoration efforts. Threats to the health of the nation's aquatic ecosystems. Approaches to evaluation before, during, and after a restoration project. The emerging specialties of restoration and landscape ecology.
