Results 261 to 270 of about 195,996 (311)

Increased recovery through deposit on heavy metal batteries

Waste Management & Research, 1983
The advantages of a deposit system to expedite the collection of batteries containing mercury and cadmium are explored against the background of the Swedish environmental protection system. Voluntary collection of used batteries at major points of sale accompanied by vigorous advertising and propaganda campaigns can achieve about 30-40% returns.
M. Backman, K. Lidgren
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Heavy Metal Concentrations in Plants in Relation to Atmospheric Heavy Metal Deposition

Journal of Environmental Quality, 1995
AbstractZinc, Cu, Pb, and Cd concentrations were examined in several plant species and corresponding organic topsoil collected in forest and on ombrotrophic bogs along a temporal (1982–1992) and a spatial (Southern Norway‐Central Norway) heavy metal deposition gradient.
B. O. Berthelsen, E. Steinnes, W. Solberg, L. Jingsen   +3 more
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Heavy metal sulphide deposits and geochemical surveys for heavy metals in New Zealand

Journal of the Royal Society of New Zealand, 1985
Abstract The ultimate primary source of heavy metals in the environment is crustal rock and the mineral deposits it contains. Background levels in the earth’s crust of the main “toxic” heavy metals lie in the ranges of: lead, 1–20 ppm; cadmium, 0.01–0.03 ppm; mercury, 0.01–0.09 ppm; and arsenic, 1–13 ppm.
R. L. Brathwaite, S. D. C. Rabone
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Leaching heavy metal from deposits of heavy metals with bacteria oxidizing elemental sulphur

Journal of Water Chemistry and Technology, 2015
Experiments were carried out on bacterial leaching heavy metals from aerobically stabilize excessive activated silt of Bortnichi Aeration Station of Kiev when adding elementary sulphur as a stimulant of the activity of acidophilic thiobacilli. It has been shown that a decrease of silt pH in the course of the process is a decisive factor of efficiency ...
A. M. Marchenko, G. N. Pshinko, V. Ya. Demchenko, V. V. Goncharuk   +3 more
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Wet Deposition of Heavy Metals

1989
Macroscale and microscale processes of removal of atmospheric metals from the atmosphere by precipitation and fog water deposition are described. Methodologies for measuring wet deposition are critically examined. Finally, pitfalls in using historical measurements of metals deposition and scavenging ratios to estimate removal are discussed.
L. A. Barrie, R. S. Schemenauer
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Heavy metals in atmospheric surrogate dry deposition

Chemosphere, 1999
This paper describes a methodological approach for the assessment of the amount of surrogate dry deposition of several toxic heavy metals (Cd, Cr, Cu, Ni, Pb, V, Zn) associated with atmospheric particulate matter at ground level. The objectives of the study were twofold: i) the evaluation of several techniques for the digestion of dry deposition ...
, Morselli, , Cecchini, , Grandi, , Iannuccilli, , Barilli, , Olivieri   +5 more
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Heavy Metal Atmospheric Deposition Study in Moscow Region, Russia

Bulletin of Environmental Contamination and Toxicology, 2019
The air quality in north-eastern part of Moscow region was evaluated by trace metals atmospheric deposition using moss Pleurozium schreberi as bioindicator. Thirty six elements were determined in analyzed samples by Neutron activation analysis and Atomic absorption spectrometry.
Konstantin Vergel, Inga Zinicovscaia, Nikita Yushin, Marina V. Frontasyeva   +3 more
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Atmospheric heavy metal deposition in agro-ecosystems in China

Environmental Science and Pollution Research, 2017
Atmospheric deposition has become one of the main sources of heavy metals in crops in developed and industrial zones in China for the past several years. However, lack of data of the agro-ecosystems on the vast areas of China makes it difficult to assess the impacts of air pollution on the heavy metal accumulation in crops.
Yanling Zhang, Shixiang Zhang, Fengpeng Zhu, Aiguo Wang, Huaxin Dai, Sen Cheng, Jianwei Wang, Lina Tang   +7 more
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Acid and heavy metal pollution by wet deposition

Science of The Total Environment, 1986
Abstract Wet deposition of acid and of ecotoxic heavy metals Cd, Pb, Cu and Zn by rain and snow in the F.R.G. was followed during the semidecade 1980 – 84 to establish the long term trends and to study regional and local situations. The free acid in rain and snow is rather uniformly distributed over the whole area as a result of mesoscalic transport ...
P. Valenta, V.D. Nguyen, H.W. Nornberg
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Dry deposition characteristics of heavy metals in Europe

Toxicological & Environmental Chemistry, 2001
Dry atmospheric deposition of heavy metals Cd, Cu, Cr, Mn, Ni, Pb and Zn have been analysed at different sites in Europe to identify seasonal variations and statistical characteristics in the period 1995–1996. Clear seasonal variations of Cd, Mn, Pb and Zn levels between winter and summer were observed.
N. Lavín, E. Marín
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