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[en] In this study our goal was to select the variety of Z. hybrida that shows the best growth in oil contaminated soils and the highest remediation of contaminated soil. We chose ‘Profusion White’, ‘Profusion Cherry’ and ‘Profusion Orange’ in Z. hybrida cultivars and cultivated the plants under 18,597 mg diesel/Kg soil condition. The dry weights of shoot and root of ‘Profusion White’ were more than ‘Profusion Cherry’ and ‘Profusion Orange’. Soil total petroleum hydrocarbons (TPH) concentration decreased in all three varieties throughout the study period and no significant differences could be observed among the varieties. Dead cells of plant roots and rotten roots after plant death are nutrient sources for microorganism in soil. We propose that ‘Profusion White’, whose root growth was the greatest among the three varieties, is the best suitable variety for the remediation of oil-contaminated soil under the initial soil TPH concentration of 20,000 mg/kg. Keywords: oil-contaminated soil, phyto remediation, varietal differences, zinnia hybrid
[en] The results of laboratory microcosmic experiment to investigate bio-toxic and opportunities of phytore-cultivation of organic-chlorine contaminated soils of toxic waste landfill in Kalush mining area (Western Ukraine) were presented in this article. Research was conducted at the molecular, organic and organismal levels; laboratory species of Sinapisalbawas used as a bio-tester. There was proved an inhibitory effect of soil toxicants on growth processes and seed germination of the bio-tester, activation of physiological and biochemical mechanisms of protection. Most informative biomarkers for bio-tests of organic-chlorine contamination were defined. The possibility of adjusting the resistance of plants by enriching the soil with bio-universal fertilizers was proven. Sinapisalbawas recommended to be introduced into bio-monitoring system and phyto-remediation of toxic waste disposal and fill.
[en] The obnoxious odour and pathogenic agents emanating from pig dung or slurry are threats to human and animal health, in Nigeria. In this study, dung was collected from local pig farms, mixed properly and allowed to stand for two day pre-treatment period to allow for bacterial activities. Thereafter, borax and kerosene application at 0, 50, 100 and 150 g per two kilograms of dung in seven litre plastic buckets were set up. Bacteria load change in the pig dung was analysed on the 2nd, 4th and 6th day post treatments. Borax at 150 g application eliminated all the bacteria by the 4th day of treatment, while kerosene could not eliminate clostridium species by the 6th day of treatment even at 330 ml application.
[en] Continual measurement on flow rate and wastewater regime in sewage systems is a new activity resulting from the synchronization of legislation on environmental protection of Bulgaria with the European requirements. The existing sewer systems are mostly of the mixed type – for domestic-industrial and rainwater runoff. The water of the first type is of ecological interest and is orders of magnitude less in quantity than rainwater. A large-scale research program for monitoring of wastewater regime and quantity is aimed at overcoming the above issues. The developed hydrometric equipment corresponds to almost all conditions and status of sewer systems in Bulgaria. A range of typified hydrometric devices is worked out for pipe diameters from Φ160 to Φ300 mm. They are suitable for measurement of non-stationary water flows and create minimal backwatering level in the pipes and minimal prerequisites for retention of suspended matter, ensuring high accuracy for minimal values of water quantity. The adopted principle of typifying has the advantages of easy installation, accurate “wet zero” adjustment and an option for laboratory calibration allowing the expansion of the operation range and offering the possibility to create geometrically similar models. Experimental models are in successful operation on a number of sites in Bulgaria.
[en] Comparisons are made of mercury concentrations in muscle tissue of three fish species caught in two lake’s points (Bourgas Lake and Mandra Lake) with two marine fish species caught from the south part of Bulgaria Black Sea (Nesebbar). The freshwater species are gibel carp, roach and perch. The seawater fish species are sprat and Mediterranean horse mackerel. The total mercury determination was performed by Milestone Direct Mercury Analyzer DMA-80.The results were expressed as mg/kg w.w. The mean concentration of gibel carp was 0.0162 mg/kg w.w; of roach varies between 0.0273-0.0233 mg/kg w.w (depending on the location); of perch was 0.0273 mg/kg w.w. On the contrary, the mean concentrations of two sea fish species were higher: sprat was 0.12 mg/kg w.w and Mediterranean horse mackerel was 0.16 mg/kg w.w. Concentrations of mercury were within the limits set from various health organization and are at acceptable levels for human consumption.
[en] Sustaining environment has been a difficult process over the past years. Malaysia normally restricts challenges on environmental issues. Mostly are caused by economic factor and lack of uniformed environmental management. Evidences of such abuses show some uncertainties in how public agencies dealt with environmental matter. And how the court address the issues is also interesting to note. The court normally encounter the problem of abuse of power via judicial review but on matters touching environment the attitude is irregular. This paper seeks to exhibit how environmental sustainability is practiced in Malaysia as compared to Australia and UK in order to identify the defects that are prevalent.
[en] The article is devoted to researching the duration of the blizzard in Georgia. Summed up the data for 1966-2017 based, existing materials from 40 meteorological stations countrywide. A multi-year change of the blizzard duration was investigated. It was determined its dependence on the height of the sea level. Geoinformation map of blizzard duration was created for Georgia. The results of the blizzard duration, along with other climatic features, will help to study the formation and development of a blizzard on the territory of Georgia, which is essential for the country's economy to reduce the damage caused by the blizzards.
[en] Despite the implementation of different methods and software for construction management in our country, the human resources management at the construction site is not given the necessary attention, which is why the losses of working time within the construction processes reach a high percentage. Human resources management at the construction site is a decisive factor for the successful completion of construction projects within the specified deadlines and in accordance with the required quality. In the present paper, the factors that lead to loss of working time in the execution of similar construction processes within selected model construction sites in our country, are examined and analyzed. The aim is to identify the problems of human resources management at construction sites, as well as to propose approaches for reducing the loss of working time, respectively for increasing the productivity of labor under certain production conditions.
[en] In the present report we announce a new habitat of the kind of fern, rare in this country, Adiantum capillus-veneris in the environs of the city of Kardzhali. The plant is one of the few species surviving after the last ice age. The species is protected under the Law of Biologic Diversity and is included in Bulgaria’s Red Book as critically threatened. Two of the habitats in the country are in the District of Kardzhali and in the category of protected area. In the register of the Executive Agency of the Environment of protected areas and the protected zones in Bulgaria, they are indicated as a “Habitat of Adiantum Raddianum” at the city of Kardzhali and Oreshari. The newly found habitat is not present in the register of the Executive Agency of the Environment, is not mentioned as known and protected by the Regional Inspectorate of the Environment and Waters, Haskovo, or by the Protection of the Environment department of Kardzhali Municipality.
[en] The formation of the chemical composition of the snow cover background territories of taiga of the European North-East of Russia (Komi Republic) takes place mainly at the expense of soluble compounds of elements. The coefficients of enrichment (Ke.) elements of the soluble fraction of snow are significantly greater than for the fraction of low-soluble compounds and close to the values of coefficients of accumulation for atmospheric aerosol. Geochemical the ranks of metals for snow cover and soil are differ. These facts shows that the chemical composition of the snow cover background territories of taiga zone is formed mainly through long-distance migrations, the influence of local natural and man-made sources is less important. According to calculations Ke. for items in the snow two groups were allocated to metals terrigenous origin and mixed terrigenous and anthropogenic origin. Rows calculated based on the values Ke. for snow, indicate the specific character of formation of the atmospheric aerosol in the studied area in comparison with the European territory of Russia. There is the influence of anthropogenic emissions and regional geochemical features of the territory. The equity ratio of elements in snow cover on the taiga are estimated. The share of low-soluble forms of metals in the composition of the snow cover decreases with latitude.