Refinar búsqueda
Resultados 1-10 de 3,390
Effect of Copper on Cadmium-Resistant Plants of Agrostis stolonifera
2023
Aleksandrovich Gladkov, Evgeny | Nikolaevna Gladkova, Olga
Environmental pollution with heavy metals has a negative impact on lawn grasses. Heavy metals are one of the priority pollutants of anthropogenic ecosystems. Earlier, plants Agrostis stolonifera, resistant to cadmium, were obtained using biotechnological method. Plants that are resistant to one heavy metal may be cross-resistant to another. The assessment of the resistance of plants obtained by biotechnological methods to other heavy metals is of practical value. The object of our study was to lawn grass - Agrostis stolonifera L. The aim of this work was to assess the tolerance of the next generation descendants of the regenerant Agrostis stolonifera, resistant to cadmium, to one of the most phytotoxic heavy metals - copper. Cadmium -tolerant plants were more resistant to copper. The tolerance of cadmium – resistant plants to copper is associated with nonspecific mechanisms. However, the increase in plant resistance was not very significant. Therefore, it is more expedient to obtain plants that are resistant to copper.
Mostrar más [+] Menos [-]Investigation of effective parameters on the performance of NF membrane in simultaneous removal of Cr (VI) and Cu from contaminated water
2017
Aghaei, Fatemeh | Jalilzadeh Yengejeh, Reza
The present study investigates an NF process for removal of copper and hexavalent chromium, studying the effect of pH (5, 7, 9) as well as contaminants' concentration (50, 500, 5000 µg/L) at a constant pressure of 8 bar; with the recovery rate, regulated at 75±2%. To determine the main factors, affecting the system performance, and evaluate the interaction effects among the factors, the experiment is designed via RSM Method. The chrome shows a higher rejection, compared with Copper, all over the range of investigated factors. As Copper concentration grows, Cu removal efficiency drops while, the Cr (VI) removal efficiency ascends. Also by increasing chrome concentration, the Cu removal efficiency decreases, while Cr (VI) removal efficiency increases. Results show that with an increase in pH, the Cu removal drops and Cr removal is increased. The pH is the main parameter, influencing the removal rate. It has been found that the maximum removal efficiency is up to 99% and 73% for Cr (VI) and Cu, respectively. There is an adequate agreement between real data and that obtained from the models (R2 was found to be 0.9889 and 0.9664, for Cu and Cr (VI) rejection, respectively).
Mostrar más [+] Menos [-]Chemical and mineralogical forms of Cu and Ni in contaminated soils from the Sudbury mining and smelting region, Canada.
1996
Adamo P. | Dudka S. | Wilson M.J. | McHardy W.J.
Effects of cadmium, copper, lead and zinc on growth, reproduction and survival of the earthworm Eisenia fetida (Savigny): assessing the environmental impact of point-source metal contamination in terrestrial ecosystems.
1994
Spurgeon D.J. | Hopkin S.P. | Jones D.T.
Cadmium availability to wheat in five soil series from the Yonne district, Burgundy, France.
1997
Mench M. | Baize D. | Mocquot B.
Organochlorine and heavy metal contamination in non-viable eggs and its relation to breeding success in a Spanish population of lesser kestrels (Falco naumanni).
1993
Negro J.J. | Donazar J.A. | Hiraldo F. | Hernandez L.M. | Fernandez M.A.
Levels of polychlorinated biphenyls, organochlorine pesticides, mercury, cadmium, copper, selenium, arsenic, and zinc in the harbour seal, Phoca vitulina, in Norwegian waters.
1990
Skaare J.U. | Markussen N.H. | Norheim G. | Haugen S. | Holt G.
Heavy metals in tissues of waterfowl from the Chesapeake Bay, USA.
1984
Guilo R.T. di | Scanlon P.F.
Assessing the impact of copper on nematode communities from a chronically metal-enriched estuary using pollution-induced community tolerance.
1995
Millward R.N. | Grant A.
Historical changes of soil metal background values in select areas of China.
1991
Li J. | Wu Y.
