Preferencje help
Widoczny [Schowaj] Abstrakt
Liczba wyników

Znaleziono wyników: 12

Liczba wyników na stronie
Pierwsza strona wyników Pięć stron wyników wstecz Poprzednia strona wyników Strona / 1 Następna strona wyników Pięć stron wyników wprzód Ostatnia strona wyników

Wyniki wyszukiwania

Wyszukiwano:
w słowach kluczowych:  environment risk
help Sortuj według:

help Ogranicz wyniki do:
Pierwsza strona wyników Pięć stron wyników wstecz Poprzednia strona wyników Strona / 1 Następna strona wyników Pięć stron wyników wprzód Ostatnia strona wyników
Issues related to storage and elimination of obsolete pesticides concern all developing countries. Eastern Europe is a region with the largest stocks in the world. In Poland, the problem with obsolete pesticides has its roots in history. Storage sites and containers in which obsolete pesticides were deposited posed, or continue to pose, a threat to the environment. The spatial conditions, particularly land features and features of the object, can actually increase environment risk. The proposed algorithm makes it possible to distinguish areas where poisonous substances posing the greatest threat to the environment are stored. This knowledge will help to determine the priorities for waste removal and monitoring of environmental receptors.
The results of a longitudinal epidemiological survey in two contrasting habitats in an area of the Mazury Lakes district of Poland indicate that both host and vector (Ixodes ricinus) densities, may be the most important risk factors for the tick-transmitted spirochetes of Borrelia burgdirferi s.l. However, the results also highlight that even related host species, such as the wild rodents Apodemus flavicollis and Clethrionomys glareolus that share the same habitat, can show quite different dynamics of tick infestation. We provide evidence that the woodland populations of A. flavicollis and C. glareolus are more frequently infested with larvae than nymphs, and more frequently with both stages than M. arvalis in the neighbouring open fallow lands. The prevalence of infestation with larvae varied from 92% for A. flavicollis, and 76% for C. glareolus to 37% for M. arvalis. Other factors, such as population age structure and sex, were also shown to impact on tick densities on hosts at particular times of the year and hence on the zoonotic risk. Moreover, particular species of rodents from different habitats, A. flavicollis (woodlands) and Microtus arvalis (fallow lands) carry infected immature I. ricinus ticks more frequently than C. glareolus voles (woodlands). Thus, the relative contribution of each species to the cumulative reservoir competence differs among species living in the woodland habitats and in relation to voles living in the fallow lands. It follows, therefore, that any factor which reduces the relative density of A. flavicollis in comparison to other hosts in the wild rodent community, will reduce also the risk of human exposure to Lyme borreliosis spirochetes.
A semi-field test was conducted to assess the risk of exposure to fufenozide in a ditch and pond adjacent to an agricultural area. To support the investigation, a fast, highly selective, and sensitive method was developed to determine the residue of fufenozide in water, sediment, and soil through high performance liquid chromatography- tandem mass spectrometry. The recoveries were in the acceptable range of 85.6% to 99.3% in the three matrices, with the associated relative standard deviations at 1.2% to 7.8%. The results indicate that the surface water-sediment system could be exposed to fufenozide through runoff after application, which dissipated rapidly in the aquatic ecosystem. The toxicity exposure ratio showed no risk of fufenozide exposure to the fish in the aquatic ecosystem close to the agriculture field.
This paper presents a comprehensive and systematic approach to sewage sludge management in both Polish and European Union (EU) legislative systems. It starts with risk, which can be caused by sewage sludge mismanagement. Also, technical aspects and boundaries of utilization and recycling routes are presented. A comparison of national and EU legislation is also presented. The next part is devoted to sewage sludge production, distribution and utilization in Poland. Finally, the influence of sewage sludge treatment and utilization on health and environmental risk in Poland are presented.
Due to the content of pathogenic organisms, including fungi, sewage sludge land application poses risks to both human health and the environment. One of the ways for reducing pathogens in sludge is liming. This study aims to determine the effect of sludge liming on the composition of keratinolytic and keratinophilic fungi in model experiments. The fungi were examined using the hair baiting method and the dilution method with incubation on a Wiegand medium supplemented with chloramphenicol (100 mg/L) and actidione (500 mg/L). The sludge liming considerably decreased the number of actidione-resistant fungi propagules and eliminated many fungal species, including Pseudallescheria boydii. The influence of this process on hair-baited fungi was that the liming eliminated keratinolytic and keratinophilic fungi at 37°C. In the range of 23-33°C, the liming considerably restricted the growth of keratinolytic fungi, including Microsporum gypseum, but only slightly affected keratinophilic fungi, including Pseudallescheria boydii. The sludge liming decreases the risk posed by geophilic dermatophytes and other keratinolytic fungi, as well as by keratinophilic fungi to humans and the environment. The process affected more keratinolytic fungi than keratinophilic ones.
This paper discusses the concentrations of heavy metals in soils at 6 sites of historic metal ore mining activities in the Sudety Mts. The main aim was to illustrate the difficulties in assessing if soil enrichment in metals originated from natural or anthropogenic factors. Such an ability to distinguish the difference is required by Polish legislation concerning the need for reclamation. Waste material collected from mine spoils usually contained very high amounts of some heavy metals (Cu, Pb, Zn, Ni, and As: up to 9940, 13600, 6150, 17600, and 40600 mg kg⁻¹, respectively). Also the soils considered as natural contained high concentrations of metals, with maximum values for Cu, Pb, Zn, Ni, and As: 3430, 2090, 3660, 4400, and 11500 mg kg⁻¹, respectively, usually exceeding many times the typical soil values and soil quality standards. Metal concentrations in the sesoils indicated strong spatial diversity. We concluded that the enrichment by heavy metals was apparently of mixed origin, both natural and anthropogenic, with unknown contributions by each factor. Additional data, including metal solubility, are needed for the assessment of the environmental risk and the need for reclamation.
The paper addresses the sensitivity of a novel method for quantifying the environmental risks associated with the current-driven transport of adverse impacts released from offshore sources (e.g. ship traffic) with respect to the spatial resolution of the underlying hydrodynamic model. The risk is evaluated as the probability of particles released in different sea areas hitting the coast and in terms of the time after which the hit occurs (particle age) on the basis of a statistical analysis of large sets of 10-day long Lagrangian trajectories calculated for 1987–1991 for the Gulf of Finland, the Baltic Sea. The relevant 2D maps are calculated using the OAAS model with spatial resolutions of 2, 1 and 0.5 nautical miles (nm) and with identical initial, boundary and forcing conditions from the Rossby Centre 3D hydrodynamic model (RCO, Swedish Meteorological and Hydrological Institute). The spatially averaged values of the probability and particle age display hardly any dependence on the resolution. They both reach almost identical stationary levels (0.67–0.69 and ca 5.3 days respectively) after a few years of simulations. Also, the spatial distributions of the relevant fields are qualitatively similar for all resolutions. In contrast, the optimum locations for fairways depend substantially on the resolution, whereas the results for the 2 nm model differ considerably from those obtained using finer-resolutionmodels. It is concluded that eddy-permitting models with a grid step exceeding half the local baroclinic Rossby radius are suitable for a quick check of whether or not any potential gain from this method is feasible, whereas higher-resolution simulations with eddy-resolving models are necessary for detailed planning. The asymptotic values of the average probability and particle age are suggested as an indicator of the potential gain from the method in question and also as a new measure of the vulnerability of the nearshore of water bodies to offshore traffic accidents.
The impact of the Gdańsk Phosphatic Fertilizer Plant “Fosfory” on citizens living near the plant was examined. Al, As, Au, Br, Ca, Cl, Cu, Dy, I, In, K, La, Mg, Mn, Mo, Na, S, Sb, Sm, U, V, Zn were determined by instrumental neutron activation analysis (IN AA) in hair and toenail clippings collected from 22 persons living in the neighborhood surrounding the plant and from 11 people from the control district. Essential differences in concentrations of elements for the citizens and the control group were evaluated using a non-parametric Mann-Whitney U-test. Significant differences between citizens of the factory neighborhood and the control group were found, for instance, for Mg, Sb, S and V, but it is hard to define if the factory impact exists, and whether it is the basis for these differences. The study was also undertaken to indicate a correlation between hair and nail element content and differences between concentrations of these elements considering sex.
Based on the recent international discussions on environmental risk assessment (ERA) for genetically modified (GM) plants, the carabids’ community of maize fields were choosen for establishing and developing a methodology to select a proper bio-indicators. The GM maize varieties expressing toxin Cry 1 and Cry 3 may differently affect biology of carnivorous and phytophagous carabids and the flow of the toxin between trophic levels. Two criteria were used to select carabid species for the future standard laboratory tests: (a) prevalence in the communities of two experimental maize fields in central and south-eastern Poland as compared to Czech and (b) their food preference.
Pierwsza strona wyników Pięć stron wyników wstecz Poprzednia strona wyników Strona / 1 Następna strona wyników Pięć stron wyników wprzód Ostatnia strona wyników
JavaScript jest wyłączony w Twojej przeglądarce internetowej. Włącz go, a następnie odśwież stronę, aby móc w pełni z niej korzystać.