خيارات البحث
النتائج 1 - 10 من 37
Protocole d' etude de la retombee de polluants metalliques dans le milieu marin dans le cadre du programe ATMOS de la Commission de Paris.
1994
Le Bihan A. | Cabon J.Y. | Tymen G.
Air pollution: significance of pulmonary dust deposits in bovine species.
1984
Dogra R.K.S. | Shanker R. | Saxena A.K. | Khanna S. | Srivastava S.N. | Shukla L.J. | Zaidi S.H.
Trace metals transport and behaviour in the Mediterranean estuary of Acheloos river.
1997
Dassenakis M. | Scoullos M. | Gaitis A.
Investigation of mineral contents of seagrasses Posidonia oceanica (L.) Del. and Cymodocea nodosa (Ucria) Asch.
2001
Macic, V. (Institut za biologiju mora, Kotor (Yugoslavia)) | Sekulic, P. (Naucni institut za ratarstvo i povrtarstvo, Novi Sad (Yugoslavia))
In order to determinate the concentration of elements: K, Ca, Na, Mg, Cu, Pb, Cr, and Cd in sea water and seagrasses Posidonia oceanica and Cymodocea nodosa sampling were done in the area of the Boka Kotorska Bay (Adriatic sea, Montenegro (Yugoslavia)). For majority of these elements variability of contents in the samples was great, but in the range of expectations. The concentrations of Pb and Cr in the seagrasses were higher from values in literature. Because of bioaccumulation and biomagnification of these metals, we have to investigate causes of these higher concentrations and possibility of toxic effects on the seagrasses and other organisms.
اظهر المزيد [+] اقل [-]Immobilization of azo-dyes for optical detection of metal ions in water: reaction with Pd(II) [palladium]
2001
Savic, J. | Vasic, V. (Institut za nuklearne nauke "Vinca", Beograd (Yugoslavia). Laboratorija za fizicku hemiju)
The reaction of Pd(II) with 1,8-dihydroxy-2-(pyrazol-5-ylazo)-naphthalen-3,6-disulphonic acid immobilized by physical sorption onto Dowex 1-X8 ion-exchange resin was investigated with the aim to develop the sorption-spectroscopic test method for the detection of low Pd(II) concentrations in water. The resin phase absorption spectra of the reagent and its Pd(II) complex were followed. The immobilized reagent has the spectral characteristics similar to those in the water and forms with Pd(II) 1:1 complex with the absorption maximum at 650 nm. Parameters, such as pH, wavelength and contact time have been optimized for a given amount of the sorbed reagent. The experimental conditions for the linear dependence of absorbance vs. Pd(II) concentration have been determined.
اظهر المزيد [+] اقل [-]Metal pollution index precision assessed from toxicity tests
2001
Teodorovic, I. (Univerzitet u Novom Sadu, Novi Sad (Yugoslavia). Prirodno-matematicki fakultet, Institut za biologiju) | Djukic, N. | Dalmacija, B. | Maletin, S. | Miljanovic, B. | Bokorov, M.
To evaluate precision and reliability of recently introduced Metal Pollution Index as a method for metal pollution monitoring of surface waters, a series of toxicity tests with Daphnia magna have been undertaken. The sampling sites (the River Danube wetlands and Hydrosystem DTD (Danube - Tisza - Danube), Serbia, Yugoslavia) for this study have been chosen according to previously recorded high MPI values. Chemical characterization and WET (whole effluent toxicity) testing of selected waste waters at the chosen sampling sites, and the recipient water toxicity testing upstream and downstream the discharger evaluated the validity of MPI, and, on the other hand, discriminated the effects of background pollution. The results of acute and chronic toxicity tests of water and sediment corresponded well with MPI values, which leads to a conclusion that MPI could be regarded as a reliable and precise method for metal pollution monitoring of surface waters.
اظهر المزيد [+] اقل [-]The environmental hazard caused by smelter slags from the Sta. Maria de la Paz mining district in Mexico
1997
Manz, M. | Castro, L.J. (UFZ Centre for Environmental Research Leipzig-Halle, Department of Chemical Ecotoxicology, PO Box 2, D-04301 Leipzig (Germany))
Accumulation of Cu and Ni in successive stages of Lymantria dispar L. (Lymantriidae, Lepidoptera) near ore smelters at Sudbury, Ontario, Canada
1996
Bagatto, G. | Shorthouse, J.D. (Department of Biology, Laurentian University, Sudbury, Ontario P3E 2C6 (Canada))
Reclamation of a bare industrial area contaminated by non-ferrous metals: physico-chemical and biological evaluation of the durability of soil treatment and revegetation
1996
Vangronsveld, J. | Colpaert, J.V. | Tichelen, K.K. van (Limburgs Universitair Centrum, Universitaire Campus, B-3590, Diepenbeek (Belgium))