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Since they often inhibit abundant bacteriological populations in municipal wastewater treatment plants, alternative treatment methods should be investigated – including advanced oxidation processes. This paper studies the degradation of three representatives of phenolic compounds using the Fenton system in the presence of chlorides and sulfates: phenol, 2-chlorophenol and 2-nitrophenol. The presence...
The pollution of aquatic ecosystems by heavy metals has assumed serious proportions due to their toxicity and accumulative behavior. River dams are especially at risk of contamination by different contaminants from anthropogenic sources including heavy metals since change of the sediment regime often occurs. The largest hydropower dam and reservoir system along the entire Danube, the Iron Gate, is...
This paper presents results of bacteriological investigations concerning coastal seawater and sandy sediments in the Three-city region at the outlet of four streams: Kacza (KaS), Swelina (SwS), Grodowy (GS) and Kamienny (KmS). The numbers of facultative psychrophilic bacteria, mesophilic bacteria and indicator bacteria (coliforms, fecal coliforms, fecal enterococci) were determined. It was found that...
This work contains the results of studies on the influence of new lysosomotropic substances on an erythrocyte membrane. The compounds studied were hydrochlorides of N,N-dimethylglycine alkyl esters (DMG-n) and N,N-dimethylalanine alkyl esters (DMAL-n) having two different-length alkyl chains (n = 12 and 16), oxalates of dimethylaminoalaninates (DMALs -n; n = 8, 10, 12, 14 and 16) and methobromides...
In this study the process of tannery wastewater treatment by electrocoagulation and coagulation with FeCl₃ followed by advanced oxidation processes (Fenton reaction, O₃/OH⁻ O₃/H₂O₂, H₂O₂ /UV) was investigated. Electrocoagulation resulted in a slightly better purification effect than coagulation. The purification effect obtained by AOPs decreased in the order: Fenton reaction
Adsorption of reactive dyes and surfactants onto chitin from mixtures containing surfactants at constant concentration and dyes at variable concentration was investigated in the present study. Two vinylsulfonate dyes (Scarlet R, Brillantorange 3R); chlorotriazine dye (Black DN); anionic (Borutosol KRN, Siarczanol N-2) and non-ionic (Rokafenol N-8) surfactants were tested. The experiments were carried...
Various ways of approaching the horizontal distribution trend (tendency) of Chromium (Cr) in soil, where pollution by this element is high, were analyzed. Interpolation algorithms: triangular irregular network (TIN), kriging, regularized spline with tension (RST), and artificial neural networks; radial basis function network (RBF), probabilistic neural network (PNN), generalized regression neural...
The lacustrine ecosystems located in the Andes Mountains in the Atacama desert and in the Chilean Southern Patagonia are characterized by their high levels of salinity, the zooplankton in these sites are characterized by a marked predominance of calanoid copepods at low or intermediate salinity levels, and at high salinity levels pratically only the genus Artemia is dominant. Data on levels of salinity...
Bitumens are produced and commonly used in paving, roofing and flooring operations, as well as corrosion-protective materials in Polish industry. During these processes bitumens, heated to the temperature range from 140°C to 200°C, emit multicomponent mixtures of toxic substances into the workplace air. Assessment of workers’ exposure to polycyclic aromatic hydrocarbons (PAHs) during road paving and...
Research was conducted on the number, secondary production and physiological properties of benthic bacteria in the eutrophic Lake Chełmżyńskie. It was found that the number of psychrophilic bacteria (CFU) occurring in the bottom sediments of the studied lake and the rate of bacterial production (BP) were all characterized by a distinct seasonal variability and depended on the location of the study...
Field experiments were carried out near Kraków (Poland), between 1999 and 2001, with nine crops (red beet, field pumpkin, chicory, common bean, barley, white cabbage, maize, alfalfa, common parsnip) to determine zinc and copper accumulation and their distribution in the plants’ tissues. Based on the results, species suitable for phytoremediation were selected. Field pumpkin and red beet were characterized...
Results of laboratory soil suspension experiments with two soils differing in organic C content (1.1 and 4.2%) and texture (14.6 – 61.0 – 24.4% and 67.5 – 20.0 -12.5% for sand – silt – clay, respectively) showed that intensive microbial growth after the addition of a sucrose nutrient medium (SNMed) caused partial transformation of the solid phase Cd to forms soluble in 0.1 M NaOH. The transformation...
Our paper presents the results of determination of road runoff water pollutants. Samples of runoff waters were collected at six sites with high traffic intensity located along a major transportation route from the city of Reda to the city of Gdańsk, and at one site with low traffic intensity located in Reda. Sampling was carried out over a period of two months in the fall of 2000. Additional samples...
A method for the synthesis of NaP1-type zeolite and analcime from Polish fly ash derived from hard coal combustion in pulverized-fuel boilers is applied in this paper. The zeolite synthesis was performed from Opole Power Plant fly ash (Elektrownia Opole S. A.), which were activated with aq 3.6% Na₂O (1.16 M NaOH) solution within 80 to 320°C. The NaP1-type zeolite and analcime crystallize at 120°C...
The purpose of this investigation was to study the effects of aluminosilicates (vermiculite and bentonite), added to feed on thallium bioaccumulation in laying hens. The experiment was conducted on 48 layers kept in cages under vivarium conditions. The hens were divided into 4 groups: Group 1- control, Group 2 – thallium-intoxicated, Group 3 – thallium-intoxicated fed on feed containing vermiculite...
The problem of noise in the industries around Sivas has been examined in this study; and noise measurement and survey studies have been carried out at concrete traverse, cement, iron and steel and textile factories located in this region. A questionnaire was completed by 256 workers during this study in order to determine the physical, physiological, and psycho-social impacts of the noise on humans...
Our work presents the results of the determination of bioavailable and total chromium (III) and chromium (VI) in the soil of an allotment garden situated in the center of Łódź. Chromium was determined by the spectrophotometric method in the form of a purple-red Cr (VI) complex with 1,5-diphenylcarbazide in the acid medium, following the establishment of the optimum amounts of the oxidant (ammonium...
Gaza beach is the only recreational area available for the local inhabitants of Gaza, Palestine. It is heavily polluted with treated, partially treated and untreated sewage from point and non-point sources. The majority of the population is below the age of 15, an age group vulnerable to gastrointestinal diseases and that usually restricts its activities to beach sand at the swash zone. A total of...
Research was carried out on the influence of heavy metals on the activity of chitinases produced by chitinolytic bacteria isolated from Moty Bay in Lake Jeziorak. In tests on the concentration of heavy metal ions in the surface water, the highest concentration of copper and zinc ions was found in July in the littoral zone, of cobalt ions in September in the pelagic zone and of lead ions in August,...
The concentration levels of airborne bacteria were measured in clinical/hospital rooms in Upper Silesia, Poland, in buildings of varying conditions. It was found that the typical level of bacterial aerosol concentration is about 10³ CFUm⁻³ in clinical outpatient rooms and ranges from 10² CFUm⁻³ to 10³ CFUm⁻³ in hospitals, depending on the number of occupants and physical quality of the building. The...
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