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The yeast strain Candida maltosa EH 15 was used as a biological agent in the hydrocarbon and emulsified hydrocarbon biodegradation. Six different surface active compounds were used to emulsify hydrocarbons. Biodegradation degree and biomass quantity were determined daily over 7 days. The obtained results indicated the strong ability of Candida maltosa EH 15 for hydrocarbon biodegradation. The addition...
Fraxinus excelsior L. (Common Ash) is a deciduous tree that grows in wild and urban Turkey. Fraxinus excelsior has been tested as a possible biomonitor of heavy metals in the city of Kayseri, Turkey. Forty-eight sites (urban road side, road side, urban park, industrial, suburban and rural sites) in and around the city of Kayseri were investigated. In this study, the concentrations of Pb, Cd, Cu, Zn,...
The concentrations of total iron were determined in the 30 rainwater samples collected at Gdynia station, located in the coastal zone of Gulf of Gdansk. The samples were assembled from December 2002 to November 2003. Total iron concentrations were measured using a colorimetric method with bathophenanthroline. The concentrations of major rain components (Na⁺, NO₃⁻-, Cl⁻, SO₄²⁻) were also determined...
Our paper presents the evaluation of retention coefficient of such natural estrogens as estrone (E1), estradiol (E2) and estriol (E3) as well as synthetic compounds considered to be endocrine disrupting substances (EDs) – ethynylestradiol (EE2), mestranol (MeEE2) and diethylstilbestrol (DES) in water treatment processes, i.e. coagulation and nanofiltration. Estrogens were retained in effect of the...
A dynamics model for nutrients was coupled with a one-dimensional physical and biological upper layer model to simulate the temporal changes not only in distributions of a nutrient but then of phytoplankton and zooplankton and study the role of these biological characteristics in the dynamics of the Gdańsk Gulf ecosystem. The 1D model consists of three submodels: a meteorological submodel for the...
In this study, by using a different variety of TiO₂ catalyst, photocatalytic oxidation of reactive azo dye used in textile industry and an improvement in the biodegradability of the dye by photocatalytic oxidation are investigated. It was found that the addition of TiO₂ in the photooxidation of dye increased color removal by 30.84 %, the addition of H₂O₂ in the presence of TiO₂ also increased color...
The research was conducted in Van, located in the eastern Anatolia region of Turkey. The purpose of this research was to assess environmental hazards to crops and soils from sludge-borne heavy metal; and the potential of using sludge as an alternative to commercial fertilizer, yield, N content and uptake of grain sorghum (Sorghum vulgare L. A-298). Sorghum plants were grown on sandy clay soils under...
The aim of this study was to (i) determine environmental pollution in Słowiński National Park on the basis of Zn, Fe, Ni, Cd and Cr concentrations in Pleurozium schreberi gametophores, (ii) draw a map of heavy metal concentrations in the area and (iii) compare the results with previous reports. Samples of Pleurozium schreberi were collected from 27 locations in Słowiński National Park in 2002. Cd...
The necessity of environmental protection has stimulated development of all kinds of methods allowing determination of different pollutants in different elements of the natural environment, including methods for determining inorganic nitrogen ions. Many of the methods used so far have proven insufficiently sensitive, selective or accurate and recently much attention has been paid to ion chromatography,...
A comparison of the linear least-squares method and a trial-and-error non-linear method of three widely used isotherms (the Langmuir, Freundlich, and Redlich-Peterson) were examined in an experiment using lead ion sorption onto peat at different temperatures. The four Langmuir linear equations are discussed. Langmuir isotherm parameters obtained from the four Langmuir linear equations using the linear...
The aim of this study was to determine the effect of reduced pressure on methane fermentation of blood, which is the main slaughter waste in the meat processing industry. The experiment was conducted in laboratory anaerobic reactors. A reactor used under atmospheric pressure was used as a control system in relation to a reactor connected to a vacuum pump, producing sub-atmospheric pressure in the...
Adsorption of anionic (Borutosol KRN, Siarczanol N-2) and nonionic (Rokafenol N-8) surfactants onto chitin and dye-modified chitin (Brillantorange 3R, Scarlet R and Black DN) was investigated. Experiments were carried out at pH 3.0 and pH 6.2. The Langmuir-Freundlich model was used to describe adsorption isotherms. It was proved that adsorption isotherms of SAAs* onto chitin were S-type. The adsorption...
Ethanol metabolites may directly or indirectly induce oxidative stress as a result of disturbed balance between pro- and antioxidative processes. An indirect effect of ethanol on the generation of oxidative stress is associated with the attenuation of intracellular defensive enzymatic antioxidants, e.g. gluthatione peroxidase, catalase, superoxide dismutase as well as water- and/or fat-soluble low-molecular...
Use of tracers and mathematical modelling to evaluate of hydraulic characteristics of constructed wetlands is presented for a duckweed pond in Mniów, Poland. Instantaneously injected bromide was used to obtain residence time distribution (RTD) of wastewater in that wetland. Flow components were identified and their hydraulic characteristics were derived from tracer concentration curve measured in...
Thick shelled river mussel Unio crassus (included in IUCN Red Data List) is a benthic, filter-feeding animal very susceptible to any changes of water chemistry. In this paper we report on the new sites of this species in the Małopolska region – an area of strong anthropogenic pressure. Physical and chemical parameters have been compared between 8 rivers inhabited and not inhabited by the mussel. Results...
This paper presents a new approach to air pollution determined through the use of elemental analysis of the annual tree rings (ATRs) of Turkish red pine (Pinus brutia Ten.). For this aim, every annual ring width was measured on the cross-section wheels of Turkish red pine supplied from ten research points around the Kemerköy (Gökova) thermal power plant (KTPP). The fly ash collected from the surfaces...
The composition of isolated natural organic matter (NOM) fractions was studied by means of high pressure size-exclusion chromatography (HP-SEC), specific ultraviolet absorbance (SUVA) at 254 nm, total luminescence spectroscopy (TLS) and synchronous scanning fluorescence measurements. The HP-SEC, SUVA and TLS studies revealed that humic acids (HA) and hydrophobic acids (HOA) are composed of complex,...
Metal bioavailability is a key factor in risk assessment procedures for contaminated sites. The goal of our study was to evaluate metal bioavailability and toxicity in long-term contaminated soils in the Tarnowskie Gory area of the Silesia region of Poland. Forty diverse soils were collected throughout the study area. Metal availability was measured using neutral salt extractions, a sequential extraction...
Studies concerning the removal of oil from model wastewater using the hybrid process combining ultrafiltration and nanofiltration were performed. The separation and transport characteristics of the employed membranes were determined. The content of oil in wastewater was estimated by the determination of total organic carbon and oil concentration measurements using a Horiba OCMA-310. The investigations...
Phytoplankton composition and biomass were studied in a small suburban lake within the city of Poznań (western Poland) on the basis of water samples taken in epilimnion. Results obtained in 1999 were compared with the first study period, of 1978. In the first period, 100 phytoplankton taxa were found and diatoms were the largest group of species (29% of all taxa), while in the second period 117 phytoplankton...
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