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Air pollution
1998
Wark, Kenneth | Warner, Cecil Francis | Davis, Wayne T.
Agricultural pesticide residues in oysters and water from two Chesapeake Bay tributaries
1998
Lehotay, S.J. | Harman-Fetcho, J.A. | McConnell, L.L.
Little is known of the impact of agricultural activity on oysters in Chesapeake Bay tributaries. As a preliminary assessment of pesticide residues in oyster tissues, this study monitored more than 60 pesticides in oysters and overlying water in two tributaries of the Chesapeake Bay. Paired water and oyster samples were collected throughout 1997 from the Patuxent and Choptank Rivers which discharge into opposite shores of the Chesapeake Bay in Maryland. In water, herbicides such as atrazine, simazine, cyanazine, and metolachlor were present throughout the year with individual water concentrations peaking as high as 430 ng/1 in the late spring and summer and subsiding in the fall. These herbicides were not detected in the oysters even when concentrations were highest in the water. Another herbicide, trifluralin, was detected throughout the year at concentrations of less than 0.6 ng/1 and 0.4 ng/g (wet weight) in water and oyster samples, respectively. Several insecticides, such as endosulfans I and II, endosulfan sulfate, chlorpyrifos, α- and γ-HCH, p,p'-DDE, o,p'-DDT, trans-nonachlor, and trans-chlordane were also measured in both oysters and water at low concentrations.
Afficher plus [+] Moins [-]Integrated pollution control | Umweltschutztechnik. English
1998
Förstner, Ulrich
Sustainable development and pollution control are the key factors in the development of strategies for the solution of environmental problems. This book offers an integrated treatment of all aspects of environmental protection and remediation. The presentation encompasses physical and chemical fundamentals, technological approaches as well as ecological, economic, and ethical aspects. The discussion of regulatory issues includes a comparison of environmental legislation in the US, Japan, and Europe. The book addresses students as a comprehensive text and serves as a handy reference for environmental professionals in industry, consulting services, administration, and environmental agencies and associations.
Afficher plus [+] Moins [-]Geographic Classification of Heavy Metal Concentrations in Mosses and Stream Sediments in the Federal Republic of Germany
1998
Berlekamp, Jürgen | Herpin, Uwe | Matthies, Michael | Lieth, Helmut | Markert, Bernd | Weckert, Vera | Wolterbeek, H. Th. | Verburg, Tona | Zinner, Hans-Jürgen | Siewers, Ulrich
The results of the first German moss monitoring programme to estimate heavy metal pollution in the Federal Republic of Germany were combined with other large-scale investigations carried out in Germany and then classified geographically in a new form. Using Monte Carlo assisted factor analysis, six factors indicating sources of pollution were identified from the sets of element data from the moss monitoring project (As, Cd, Cr, Cu, Fe, Ni, Pb, Ti, V, Zn) and the data sets for SO₂ and particulate. The geographic distribution patterns of the factor values showed the regions in which the various sources are to be found. By combining the data the primarily anthropogenic chromium concentrations of the mosses were compared with the mainly geogenic chromium concentrations of the stream sediments in the form of examples. After normalization, the transformed chromium concentrations were transferred to a map of the entire area using inverse distance weighting. Anthropogenic and geogenic influences are being discussed on the basis of the results.
Afficher plus [+] Moins [-]Bioaccumulation and Toxicity of Zinc in Spirogyra Fluviatilis Hilse (Chlorophyta)
1998
Saygideger, S.
The bioaccumulation and toxicity of zinc in Spirogyra fluviatilis Hilse, from two populations in the River Seyhan, Adana, Turkey, were examined in laboratory flowing-water channels. Plants were subjected to zinc concentrations ranging from 0 to 4.0 mg L⁻¹ at current velocities of 25–35 cm s⁻¹ for up to 3 h. There was little difference in zinc bioaccumulation between Spirogyra from the site showing mild organic pollution and that from the site subjected to considerable inputs from urban and motorway runoff. Uptake of zinc increased with increasing concentration in the test solution and was linear and proportional up to 0.5 mg L⁻¹. Cellular damage was evident in Spirogyra subjected to 0.5 mg L⁻¹ zinc, and increased with increasing zinc concentration.
Afficher plus [+] Moins [-]Water pollution risks of methyl tertiary butyl ether (MTBE)
1998
Guidelines for evaluating air pollution impacts on wilderness within the Rocky Mountain region
1998
Haddow, Dennis | Blett, Tamara | Fisher, Richard | Musselman, Robert C.
Water pollution from agriculture in the context of land use planning
1998
Nishizawa, Eiichirō
Measures taken pursuant to Council Directive 91/676/EEC concerning the protection of waters against pollution caused by nitrates from agricultural sources
1998
Proceedings of the International Symposium on Air Pollution and Climate Change Effects on Forest Ecosystems, February 5-9, 1996, Riverside, California
1998
Bytnerowicz, Andrzej | Arbaugh, Michael J. | Schilling, Susan L.