Modeling of reactive transport at a site contaminated by petroleum hydrocarbons at Hnevice, Czech Republic (O. Sracek & Z. Vencelides)

2011 ◽  
pp. 287-294
Keyword(s):  
Czech Republic ◽  
Petroleum Hydrocarbons ◽  
Reactive Transport ◽  
A Site

scholarly journals Records of interesting flies (Diptera) attracted to meat baited pyramidal trap on sapping stump of European walnut (Juglans regia) in Central Bohemia (Czech Republic)

2011 ◽  
Vol 60 (3) ◽  
pp. 223-233 ◽  
Author(s):  
Miroslav Barták ◽  
Jindˇch Roháček
Keyword(s):  
Czech Republic ◽  
Juglans Regia ◽  
First Record ◽  
Point Of View ◽  
Nature Conservancy ◽  
A Site ◽  
Rich Spectrum

Records of interesting flies (Diptera) attracted to meat baited pyramidal trap on sapping stump of European walnut (Juglans regia) in Central Bohemia (Czech Republic) A pyramidal trap with combined bait is described and illustrated. The trap inserted above sapping stump of European walnut (Juglans regia) in a site in Central Bohemia near Uhlířské Janovice in 2010 yielded a rich spectrum of flies (Diptera). Records of 24 species most interesting from the faunistic, biological and nature conservancy point of view are given with comments upon their distribution and biology but a number of other captured species are also mentioned. Besides species developing in or attracted as adults to sap runs [e.g. Syrphidae: Ceriana conopsoides (Linnaeus, 1758), Aulacigastridae: three Aulacigaster spp., various Drosophilidae], other important components were formed by saproxylic [Xylomyidae: Solva marginata (Meigen, 1820), some Stratiomyidae, many Lonchaeidae, Milichiidae: Milichia ludens (Wahlberg, 1847), some Muscidae], mycophagous (some Asteiidae, Sphaeroceridae, Drosophilidae), necrophagous (some Sepsidae, Acartophtalmidae, Milichiidae, Sphaeroceridae) and saprophagous (some Sepsidae, Carnidae, Milichiidae, Sphaeroceridae) species, both latter attracted to meat-bait used in the trap. Aulacigaster falcata Papp, 1998 is the first record from Bohemia.

scholarly journals Bioremediation of groundwater contaminated with petroleum hydrocarbons applied at a site in Belgrade (Serbia)

2020 ◽  
Vol 85 (8) ◽  
pp. 1067-1081
Author(s):  
Sandra Bulatovic ◽  
Nenad Maric ◽  
Tatjana Solevic-Knudsen ◽  
Jelena Avdalovic ◽  
Mila Ilic ◽  
...  
Keyword(s):  
Petroleum Hydrocarbons ◽  
Cost Effective ◽  
Subsequent Treatment ◽  
Limiting Factors ◽  
Contaminated Site ◽  
Microbiological Activity ◽  
A Site ◽  
Specialized Population ◽  
Remediation Process

Due to their extensive use, petroleum hydrocarbons are among the most common groundwater contaminants. Compared to the traditional methods of physical pumping of contamination from the aquifer and subsequent treatment (i.e., pump and treat), bioremediation is an economically cost-effective technology. The aim of this remediation approach is to transform biologically contaminants, most often by microbiological activity, into non-toxic compounds. More precisely, it is an active remediation process that involves biostimulation (increase of aquifer oxygenation, addition of nutrients) and/or bioaugmentation (injection of a concentrated and specialized population of microorganisms). Using both biostimulation and bioaugmentation, enhanced in situ groundwater bioremediation was applied at a hydrocarbon-contaminated site in Belgrade. The bioremediation treatment, applied over twelve months, was highly efficient in reducing the concentrations of total petroleum hydrocarbon (TPH) to acceptable levels. The concentration of TPH in the piezometer P-5 was reduced by 98.55 %, in the piezometer P-6 by 98.30 % and in the piezometer P-7 by 98.09 %. These results provided strong evidence on the potential of this remediation approach to overcome site-limiting factors and enhance microbiological activity in order to reduce groundwater contamination.

scholarly journals Assessment of European and hybrid aspen clones efficiency based on height growth and removal percentage of petroleum hydrocarbons—a field trial

2020 ◽  
Vol 27 (36) ◽  
pp. 45555-45567
Author(s):  
Mir Md Abdus Salam ◽  
Muhammad Mohsin ◽  
Fahad Rasheed ◽  
Muhammad Ramzan ◽  
Zikria Zafar ◽  
...  
Keyword(s):  
Petroleum Hydrocarbons ◽  
Removal Rate ◽  
Survival Rates ◽  
Height Growth ◽  
Total Petroleum Hydrocarbons ◽  
Hybrid Aspen ◽  
Global Environmental Issue ◽  
European Aspen ◽  
Polycyclic Aromatic ◽  
A Site

AbstractSoils polluted by organic or inorganic pollutants are an emerging global environmental issue due to their toxic effects. A phytoremediation experiment was conducted to evaluate the extraction potential of three European aspen clones (R2, R3, and R4) and seven hybrid aspen clones (14, 27, 34, 134, 172, 191, and 291) grown in soils polluted with hydrocarbons (includes polycyclic aromatic hydrocarbons (PAH) and total petroleum hydrocarbons (TPH)). Height growth, plant survival rates, and .hydrocarbon removal efficiencies were investigated over a 4-year period at a site in Somerharju, Luumaki Finland, to assess the remediation potential of the clones. Hydrocarbon content in the soil was determined by gas chromatography and mass spectrometry. The results revealed that hybrid aspen clones 14 and 34 and European aspen clone R3 achieved greater height growth (171, 171, and 114 cm, respectively) than the other clones in the study. Further, the greatest removals of PAH (90% at depth 10–50 cm) and (86% at depth 5–10 cm) were observed in plot G15 planted with clone R2. Furthermore, the greatest TPH removal rate at 5–10 cm depth (C22–C40, 97%; C10–C40, 96%; and C10–C21, 90%) was observed in plot 117 with clone 134. However, other clones demonstrated an ability to grow in soils with elevated levels of TPH and PAH, which indicates their tolerance to hydrocarbons and their potential capacity for phytoremediation of hydrocarbon-polluted soils. Our study suggests that European aspen and hybrid aspen clones could be used for the remediation of soils polluted with PAH and TPH.

scholarly journals Frequency of occurrence of a certain air temperature at various sites in the Czech Republic

2010 ◽  
Vol 56 (No. 4) ◽  
pp. 127-137
Author(s):  
V. Šleger ◽  
P. Neuberger
Keyword(s):  
Czech Republic ◽  
Air Temperature ◽  
Quadratic Equation ◽  
Temperature Data ◽  
Weather Data ◽  
Coefficient Of Determination ◽  
Maximum Daily Temperature ◽  
The Czech Republic ◽  
A Site ◽  
Different Altitudes

The present paper analyses the problem of calculation of the average number of hours in a year during which air temperature is lower than a preselected limiting level. A method for estimating the number of hours in situations where only the minimum, average, and maximum daily temperature data are available has been suggested and tested. The work encompassed 30 sites in the Czech Republic at different altitudes and with different average temperatures, using weather data from the 1961–2000 period. The results are presented in the tabular form. It is shown that interdependence exists between the number of hours with temperatures lower than a preselected limiting level and the average yearly temperature at the specific site. For instance, temperatures below 15°C during a typical year at a site with an average yearly temperature θyr (°C) within the range of 2.8°C to 9°C can be expected (coefficient of determination 0.986) for a time τ (h) calculated from the quadratic equation τ = –12.992 × θyr 2 – 116.6 × θyr + 8,483.

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