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Tytuł:
Occupational exposure level of pig facility workers to chemical and biological pollutants
Autorzy:
Chmielowiec-Korzeniowska, A.
Tymczyna, L.
Pyrz, M.
Trawińska, B.
Abramczyk, K.
Dobrowolska, M.
Powiązania:
https://bibliotekanauki.pl/articles/2081683.pdf
Data publikacji:
2018
Wydawca:
Instytut Medycyny Wsi
Tematy:
environmental exposure
airborne contaminant
pig facility
Opis:
Objective. The aim of the study was to assess the impact of a fattening season on the level of airborne chemical and microbial pollutants in the pig fattening house. Materials and method. Evaluation of the air composition as well as the microbiological air quality were made during 2 series, i.e. in the summer and winter period of fattening. Airborne gaseous pollutants were analyzed by gas (organic compounds) and liquid (inorganic compounds) chromatography methods. Air microbial contamination was determined in compliance with the Polish Standard PN-EN 13098:2007. Results. The air/gas composition in the pig unit showed that irrespective of the fattening season, the level of determined pollutants – especially ammonia, volatile organic compounds (VOCs), including methanethiol and total dust – could have an adverse effect on the health of swine facility workers. The investigated pig building was found to be a source of chemical pollutants as well as biological agents. The total bacterial count in 1 m3 of air was 3.6×106 and 4.6×106 cfu, during the winter and summer periods of fattening, respectively. Gram-positive cocci predominated in both seasons. In the winter, fungi of the Trichoderma genus were represented equally often. In the summer period, up to 90% of the isolated fungus was Aspergillus spp. Conclusions. Workers engaged in swine rearing and production are occupationally exposed not only to a high concentration of microbial contamination, but also to irritating and odorogenous volatile compounds. Thus, activities directed at the promotion of health prevention strategies, as well as effective guidelines for safe and hygienic animal housing, should be implemented.
Źródło:
Annals of Agricultural and Environmental Medicine; 2018, 25, 2; 262-267
1232-1966
Pojawia się w:
Annals of Agricultural and Environmental Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
New Ray on Remediation of High Rings Polycyclic Aromatic Hydrocarbons: Remediation of Raw Petroleum Sludge Using Solidification and Stabilization Method
Autorzy:
Roslee, Noor Faiza
Kamil, Nor Amani Filzah Mohd
Kadir, Aeslina Abdul
Jalil, Abdul Rahim
Hamzah, Nurhidayah
Noor, Norazian Mohamed
Sandu, Andrei Victor
Powiązania:
https://bibliotekanauki.pl/articles/2174581.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
remediation
solidification/stabilization
organic contaminant
hazardous waste
Opis:
Solidification/Stabilization (S/S) method with cement as a binder to remediate metals in petroleum sludge has been successfully proven. However, this technique has not yet been explored to remediate organic contaminants since a high concentration of Total Petroleum Hydrocarbon (TPH) was also detected in the sludge. This study focuses on remediating 16 Polycyclic Aromatic Hydrocarbons (PAHs) compounds in raw petroleum sludge with Portland cement as a binder using the S/S method. The initial concentration of 16 PAHs in the raw sludge was first measured before the performance of the S/S method to remediate the PAHs were evaluated. The S/S matrices were tested for leaching behavior and strength after 7 and 28 days by air curing. The leaching test was measured using the Toxicity Characteristics Leaching Procedure (TCLP), and the remaining PAHs concentration in the matrices was analyzed using a Gas Chromatography-Mass Spectrometer (GC-MS). In the raw sludge, all 16 PAHs compounds were below the standard limit except for Benzo(a)anthracene, Benzo(a)pyrene, Dibenzo(ah)anthracene, and Indeno(1,2,3- cd_ pyrene), which are considered as high rings PAHs. The high rings PAHs show lower concentration in leachate than low rings PAHs, which indicates the potential of the S/S method in remediating high rings PAHs. The high sludge ratio in S/S matrices has shown that the percentage strength is increasing, similar to Portland cement. Therefore, this study contributed to the possibility of the S/S method in the remediation of PAHs in petroleum sludge by using only Portland cement as a binder.
Źródło:
Archives of Metallurgy and Materials; 2022, 67, 4; 1201--1208
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Zastosowanie wysokiego cisnienia w atmosferze helu do obnizenia zanieczyszczenia mikrobiologicznego przypraw ziolowych
High pressure processing of spices in atmosphere of helium for decrease of microbiological contamination
Autorzy:
Windyga, B
Fonberg-Broczek, M.
Sciezynska, H.
Skapska, S.
Gorecka, K.
Grochowska, A.
Morawski, A.
Szczepek, J.
Karlowski, K.
Porowski, S.
Powiązania:
https://bibliotekanauki.pl/articles/877017.pdf
Data publikacji:
2008
Wydawca:
Narodowy Instytut Zdrowia Publicznego. Państwowy Zakład Higieny
Tematy:
przyprawy ziolowe
zanieczyszczenia zywnosci
zanieczyszczenia mikrobiologiczne
dekontaminacja mikrobiologiczna
wysokie cisnienia
zastosowanie
herbal spice
food contaminant
microbiological contaminant
microbiological decontamination
high pressure
application
Opis:
Celem pracy było zbadanie możliwości zastosowania technologii wysokociśnieniowej (HPP) oraz podwyższonej temperatury w atmosferze gazu szlachetnego - helu - do redukcji zanieczyszczenia mikrobiologicznego w przyprawach ziołowych: owocach kolendry i nasionach kminku. Badane produkty poddawano działaniu ciśnienia 800 MPa i 1 000 MPa przez 30 minut w zakresie temperatur od 60 do 121°C. Stwierdzono redukcję mikroflory tlenowej o 2 cykle logarytmiczne, przy całkowitej inaktywacji bakterii z grupy coli oraz drożdży i pleśni. Zaobserwowano, że skuteczność procesu w atmosferze helu zależy od wilgotności środowiska i zabieg pozwala na redukcję zanieczyszczenia mikrobiologicznego przynajmniej przy 20% zawartości wody. Zastosowanie procesu HPP w atmosferze helu może być wykorzystanie do poprawy jakości mikrobiologicznej przypraw ziołowych.
The aim of the study was to investigate the microbiological decontamination of coriander and caraway when HPP technology was applied in elevated temperature in helium atmosphere. The HPP and heat treatment was conducted for 30 minutes at 800 and 1 000 MPa and temperature range was 60 - 121°C. Contamination with aerobic mesophilic bacteria was decreased by about 2 logarithmic cycles. Total elimination of coliform and yeast and moulds was observed. The efficacy of HPP treatment under helium atmosphere depended on the content of the water in tested samples. It can be concluded that high pressure treatment under atmosphere of helium, combination of proper high pressure and time improved the microbiological quality of spices.
Źródło:
Roczniki Państwowego Zakładu Higieny; 2008, 59, 4; 437-443
0035-7715
Pojawia się w:
Roczniki Państwowego Zakładu Higieny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modeling Soluble Contaminant Migration by Advection Process in Subsurface Water in the Eastern Niger Delta, Nigeria
Autorzy:
Ugbena, K. G.
Tse, A. C.
Akpokodje, Enuvie G.
Powiązania:
https://bibliotekanauki.pl/articles/1030673.pdf
Data publikacji:
2020
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Aquifer
advective velocity
conservative tracer
migration
soluble contaminant
subsurface water
Opis:
The advective property of an aquifer in the Eastern Niger Delta was evaluated using a conservative tracer. Tracer migration was monitored in observation boreholes at various radial distances simultaneously. Particle size distribution analysis for the sand samples collected from the boreholes in the study site revealed aquifer composition to be predominantly fine sand (silt =13.42%, fine sand = 41.76%, medium sand = 36.71% and coarse sand = 8.09%) for the 8m depth sampled. This field tracer test thus, provides a definitive data on the simultaneous transport of a soluble contaminant and allows a quantitative appraisal of the advective property of the study site. The mean velocity determined 1.212×10-3 ms-1, represents the advective velocity of groundwater carrying the dissolved tracer substance. This is an indication of how soluble components of hydrocarbon will be transported in the study area. Modeling tracer migration by advection process to estimate where and when a soluble contaminant problem can first be noticed in an environmental matrix and its application in hydrological studies is an effective tool to address problems such as sustainability and uncertainty in groundwater resource system.
Źródło:
World Scientific News; 2020, 139, 2; 102-114
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Radial Flow Tracer Test to Investigate Coefficient of Transverse Dispersion in an Aquifer in the Eastern Niger Delta, Nigeria
Autorzy:
Ugbena, K. G.
Akpokodje, Enuvie G.
Tse, A. C.
Powiązania:
https://bibliotekanauki.pl/articles/1068620.pdf
Data publikacji:
2019
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Aquifer
Niger Delta
advective velocity
contaminant
longitudinal dispersion
transverse dispersion
Opis:
The complex nature of flow dynamic of water at the subsurface makes it difficult to characterize directly the processes taking place in a porous medium. As a result, carrying out studies on the characteristics of contaminants at the subsurface often relies on indirect measurements of the parameters of the system. To overcome these difficulties and provide information on the subsurface, the continuous use of tracers in simulation studies to model hydrological characteristics at the subsurface has provided an important tool for understanding the flow and mixing dynamics of water resource systems. Results obtained from this radial flow tracer test shows coefficient of longitudinal and transverse dispersion of 2.104×10-3 m2s-1 and 1.54×10-3 m2s-1 respectively, longitudinal and transverse dispersivity of 1.73m and 1.27m respectively. Multidimensional transport in an aquifer involves both longitudinal and transverse dispersion in addition to advection process. Transverse dispersion in an aquifer spreads dissolved contaminant by molecular diffusion when flow velocity of groundwater is highly low. Initial concentration of dissolved contaminants at the point of release can produce an upstream spreading in a longitudinal transverse direction by molecular dispersion which is a diffusion-like process in an aquifer. Results obtained from tracer test can be used to characterize a site and for groundwater monitoring. Having basic knowledge of some physical processes taking place at the subsurface such as that produced from tracer test can also help in the design of environmental network to evaluate possible accidental migration of contaminants once it occur in aquifers and plan suitable mitigation actions to safeguard our water resource.
Źródło:
World Scientific News; 2019, 132; 233-243
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Simulation study on the structural optimization of composite insulators based on contaminant deposition
Autorzy:
Lv, Yukun
Chen, Zeze
Wang, Qian
Lu, Yao
Li, Xiaojing
Powiązania:
https://bibliotekanauki.pl/articles/27309958.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:
composite insulator
contaminant deposition characteristics
numerical simulation
voltage type
structural optimization
Opis:
Optimizing the aerodynamic structure of composite insulators can guarantee the safe operation of power systems. In this study, we construct a simulation model for composite insulator contaminant deposition using the COMSOL simulation software, and the rationality of the simulation model and method is verified through wind tunnel experiments. Taking the FXBW4-110/100 composite insulator as an example, we adopt a progressive optimization plan to explore the impacts of shed spacing s, and shed inclination angles α and β on its contaminant deposition characteristics under DC and AC voltages. Based on the numerical simulation results, we analyze the antifouling performance of insulators before and after structural optimization. The results indicate the following: 1) The contaminant deposition of the insulator under AC and DC voltages is negatively correlated with the shed spacing s, but positively correlated with the lower inclination angle β. 2) Under AC voltages, the contaminant deposition of the insulator increases with the upper inclination angle α, while under DC voltages, the contaminant deposition shows an uptrend first, then a downtrend and then an uptrend again with the increase of the upper inclination angle α. 3) Compared with the original model, the AC-optimized model ( α = 6°, β = 2° and s = 98 mm) with a larger shed spacing s, and smaller shed inclination angles α and β showed superior antifouling performance at wind speeds of no less than 2 m/s, and under the typical conditions ( v = 2.5 m/s, d = 20 μm, and ρ = 2 200 kg/m 3), its contaminant deposition is 15% less than that of the original model ( α = 10°, β = 2° and s = 80 mm).
Źródło:
Archives of Electrical Engineering; 2023, 72, 4; 1089--1105
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Oznaczanie wielopierscieniowych weglowodorow aromatycznych[WWA]w trawie
Determination of polycyclic aromatic hydrocarbons in grass
Autorzy:
Lipniak, M
Brandys, J.
Stepniewska, B.
Powiązania:
https://bibliotekanauki.pl/articles/877685.pdf
Data publikacji:
1993
Wydawca:
Narodowy Instytut Zdrowia Publicznego. Państwowy Zakład Higieny
Tematy:
chromatografia gazowa
weglowodory aromatyczne wielopierscieniowe
trawy
oznaczanie
zanieczyszczenia powietrza
zanieczyszczenia srodowiska
gas chromatography
polycyclic aromatic hydrocarbon
grass
determination
air contaminant
environment contaminant
Opis:
Metodę chromatografii gazowej zastosowano do oznaczania zawartości fenantrenu, fluorantenu, pirenu, bezno(a)pirenu, chryzenu, benzo(g,h,i) perylenu i perylenu w materiale roślinnym
Gas chromatographic method was used to determine the concentration of PAHs (pyrene, fluoranthene, phenanthrene, chrysene, benzo(a)pyrene and benzo(ghi)perylene) in the grass. Study materials were collected near the traffic road in Cracow. PAHs were extracted with cyclohexane. The glass column coated with Kieselgel was used tu purified the extract. The extract was concentrated on vacuum evaporator and put on the top of glass column with aluminium oxide. PAHs were determined in cyclohexane eluant by gas chromatography after concentrate. The highest PAH concentration was 23,7 µg/g (phenanthrene in the sample of the grass collected from PI. Wolności). The concentration of benzo(a)pyrene in range from 0.04 to 0.4 µg/g depended on the place of collecting sample.
Źródło:
Roczniki Państwowego Zakładu Higieny; 1993, 44, 2-3; 205-212
0035-7715
Pojawia się w:
Roczniki Państwowego Zakładu Higieny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Toksykologia glinu
Toxicology of aluminium
Autorzy:
Ludwicki, J K
Powiązania:
https://bibliotekanauki.pl/articles/873630.pdf
Data publikacji:
1993
Wydawca:
Narodowy Instytut Zdrowia Publicznego. Państwowy Zakład Higieny
Tematy:
farmacja
zywnosc
toksykologia
glin
konferencje
zanieczyszczenia zywnosci
choroby zawodowe
zanieczyszczenia srodowiska
Warszawa konferencja
pharmacy
food
toxicology
aluminium
conference
food contaminant
occupational disease
environment contaminant
Warsaw conference
Opis:
Omówiono zagadnienia związane z narażeniem środowiskowym na glin, zagrożeniami wynikającymi z ekspozycji populacji generalnej na ten metal oraz skutkami zawodowego i jatrogennego narażenia na glin i jego związki.
Źródło:
Roczniki Państwowego Zakładu Higieny; 1993, 44, 1; 15-21
0035-7715
Pojawia się w:
Roczniki Państwowego Zakładu Higieny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Zużycie łożyskowań ślizgowych ze zmodyfikowaną konstrukcją czopa w przypadku zanieczyszczenia oleju cząstkami ściernymi
Wear of sliding bearings having a modified lubricated journal
Autorzy:
Sęp, J.
Powiązania:
https://bibliotekanauki.pl/articles/190111.pdf
Data publikacji:
2011
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
łożysko ślizgowe
olej
zanieczyszczenie
zużycie
journal bearing
oil
contaminant
wear
Opis:
W artykule przedstawiono wyniki badań zużycia łożyskowań ślizgowych smarowanych olejem zanieczyszczonym tlenkiem glinu. Przebadano sześć skojarzeń różniących się twardością współpracujących elementów oraz konstrukcją czopa. Wykazano możliwość zmniejszenia zużycia wywołanego zawartymi w oleju twardymi zanieczyszczeniami poprzez zmianę konstrukcji czopa. Przeprowadzono ponadto analizę porównawczą intensywności zużycia dla testowanych skojarzeń ślizgowych.
Results of tribological wear investigations concerning sliding bearings with six different journals in the presence of an oil abrasive contaminant are presented in the paper. The investigated variants are as follows: – Variant 1 – journal made from C45 steel (hardness 86 HB) mating with sleeve made from MB 50 alloy (79% Al, 20% Sn, 1% Cu, hardness žHV0,1 = 600 MPa), – Variant 2 – journal made from heat-treated 34CrNiMo6 steel (hardness 34 HRC) mating with a sleeve made from MB 50 alloy, – Variant 3 – journal made from heat-treated 34CrNiMo6 steel (hardness 34 HRC) with a two- component surface layer (steel-copper) mating with a sleeve made from MB 50 alloy, – Variant 4 – journal made from heat-treated 34CrNiMo6 steel (hardness 34 HRC) with two- component surface layer (steel-copper) mating with a sleeve made from heat-treated C45 steel (hardness 30 HRC), – Variant 5 – journal made from heat-treated 42CrMo4 steel (hardness 52 HRC) mating with a sleeve made from MB 50 alloy, and – Variant 6 – journal made from heat-treated 42CrMo4 steel (hardness 52 HRC) with a helical groove mating with a sleeve made from MB 50 alloy. The lubricating agent was SAE 40 oil contaminated with Al2O3 particles. Wear volumetric intensity (Iv) for all investigated bearings, as a quotient of volumetric wear and friction path, was calculated. The least tribological wear (Iv = 0.85 mm3/km) was stated for Variant 4. The research indicates that both of the investigated journal modifications resulted in a wear intensity decrease (for variant 3 Iv = 2.73 mm3/km, for variant 6 Iv = 1.21 mm3/km) in the case of an abrasive contaminant in the oil.
Źródło:
Tribologia; 2011, 6; 201-209
0208-7774
Pojawia się w:
Tribologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Assessing the performance of the airflow window for ventilation and thermal comfort in office rooms
Autorzy:
Fathi Ajirlou, Ildar
Kurtay, Cüneyt
Powiązania:
https://bibliotekanauki.pl/articles/1955029.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
HVAC
natural ventilation
air-flow window
thermal comfort
contaminant removal
Opis:
In the present study performance of an airflow window in removing contaminants as well as providing thermal comfort for the occupants was investigated. Both natural/mixed ventilation methods were studied and the full heating load as well as contaminant sources in the office rooms considered. Then, the local and average temperature, relative humidity, velocity as well as CO2 and dust concentration were extracted from simulation results and compared to criteria in international ventilation standards. It was found that except in the big room having 8 m×6 m flooring, natural ventilation from the airflow window can satisfy the thermal and relative humidity conditions in the international ventilation standard except for the American Society of Heating, Refrigerating and Air-Conditioning Engineers. However, the thermal comfort in the room which was measured by extended predicted mean vote could not be achieved when the window operates in the natural ventilation mode, even with a 0.4 m height opening in the small (3 m×4 m) room. Finally, results indicated that the airflow ventilation system installed in small and medium offices operation can provide indoor condition in the ventilation standard either in natural/mixed operation mode consuming less energy than the traditional heating, ventilation, and air conditioning. Besides, the airflow system not only was not able to provide thermal comfort condition in the big office but also its application was not economically feasible.
Źródło:
Archives of Thermodynamics; 2021, 42, 3; 209-242
1231-0956
2083-6023
Pojawia się w:
Archives of Thermodynamics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Reduction of heavy metals from waste water by wetland
Autorzy:
Sahu, O.
Powiązania:
https://bibliotekanauki.pl/articles/10928.pdf
Data publikacji:
2014
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
metal reduction
heavy metal
waste water
wetland
biomass
contaminant
metal ion
natural treatment
Opis:
Constructed wetlands are artificial wastewater treatment systems consisting of shallow ponds or channels which have been planted with aquatic plants, and which rely upon natural microbial, biological, physical and chemical processes to treat wastewater. They typically have impervious clay or synthetic liners, and engineered structures to control the flow direction, liquid detention time and water level. Depending on the type of system, they may or may not contain an inert porous media such as rock, gravel or sand. Constructed wetlands have been used to treat a variety of wastewaters including urban runoff; municipal, industrial, agricultural and acid mine drainage. In this regard’s an attempted has been made to reduce the heavy metal present in waste water.
Źródło:
International Letters of Natural Sciences; 2014, 07
2300-9675
Pojawia się w:
International Letters of Natural Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Kuchnie gazowe jako zrodlo emisji benzo[a]pirenu
Gas-cookers as a source of benz[a]pyrene emission
Autorzy:
Kozlowski, J
Powiązania:
https://bibliotekanauki.pl/articles/878024.pdf
Data publikacji:
1993
Wydawca:
Narodowy Instytut Zdrowia Publicznego. Państwowy Zakład Higieny
Tematy:
kuchnia gazowa
spaliny
gaz ziemny
paliwa
benzo[a]piren
zanieczyszczenia powietrza
emisja gazow
zanieczyszczenia srodowiska
combustion gas
natural gas
fuel
air contaminant
gas emission
environment contaminant
Opis:
W pracy przedstawiono metodę spektrofluorometrycznego oznaczania benzo(a)pirenu bez wstępnego oddzielenia od innych wielopierścieniowych węglowodorów aromatycznych. W oparciu o opracowaną metodę określono zawartość tego związku w powietrzu zanieczyszczonym spalinami powstającymi podczas spalania wybranych paliw gazowych. Na podstawie przeprowadzonych badań ustalono, że podczas spalania warszawskiego gazu ziemnego nie powstaje benzo(a)piren. Natomiast spalenie mieszanki propan-butanu może powodować znaczne zanieczyszczenie powietrza omawianą substancją.
The spectrofluorimetric method of benzo(a)pyrene was used without separating it from other polycyclic aromatic hydrocarbons. On the basis of that method the content of that compound was measured in air contaminated with gas after burning of gas cookers. The study showed that this compound is not present in Warsaw when earth gas is burning, but burning of propane-butane mixture contaminates air with this compound in a considerable degree.
Źródło:
Roczniki Państwowego Zakładu Higieny; 1993, 44, 2-3; 277-279
0035-7715
Pojawia się w:
Roczniki Państwowego Zakładu Higieny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Kinetyka rozkladu specyficznych zanieczyszczen w srodowisku wodnym
The kinetics of distribution of contaminants in aqueous environment
Autorzy:
Bogacka, T
Powiązania:
https://bibliotekanauki.pl/articles/871888.pdf
Data publikacji:
1993
Wydawca:
Narodowy Instytut Zdrowia Publicznego. Państwowy Zakład Higieny
Tematy:
weglowodory aromatyczne wielopierscieniowe
zanieczyszczenia srodowiska
badania laboratoryjne
wody powierzchniowe
biodegradacja
kinetyka
zanieczyszczenia wod
polycyclic aromatic hydrocarbon
environment contaminant
laboratory research
surface water
biodegradation
kinetics
water contaminant
Opis:
Wyznaczono kinetykę rozkładu specyficznych zanieczyszczeń wód powierzchniowych: wybranych przedstawicieli wielopierścieniowych węglowodorów aromatycznych (benzo(a)piren i fluoranten) i chlorowcowych pochodnych metanu (chlorek metylenu, chloroform, czterochlorek węgla). Doświadczenia prowadzono w warunkach laboratoryjnych symulujących środowisko wody rzecznej i destylowanej. Szybkość rozkładu badano w zależności od stężenia początkowego, temperatury i zdolności adaptacyjnych mikroflory do środowiska.
The study was carried out for establishing the distribution of benzo(a)pyrene, fluoroanthene, methylene chloride, chloroform and carbon tetrachloride under model conditions, simulating the environment of river water moderately contaminated and distilled water. The experiments were carried out for safe concentrations and concetrations 2-5 times greater at two temperatures: about 20°C and 4°C, and after adaptation of microorganisms to the presence of the analysed substances. In the light of the obtained results the kinetic parameters were established of the degradation process: rate constans and degradation half-times. The process developed in accordance with the kinetic equation of 1st order and depended on the model, group of determined compounds, initial concentration, temperature and microflora adaptation to the presence of the studied substances. Of the studied contaminants the degradation of polycyclic aromatic hydrocarbons - benzo(a)pyrene and fluoroanthene, progressed at the highest rate. The higher rate of degredation in river water than in distilled water suggests that microorganisms present in natural waters participated in the degradation od the determined compounds. This process was slowed down by temperature fall to about 4°C. When the microflora had been adapted to the presence of chlorinated methane derivatives the process of degradation was as rule slower than in the situation of their direct addition to the experimental model adaptation was shown to have no effect on the kinetics of polycyclic hydrocarbon degradation.
Źródło:
Roczniki Państwowego Zakładu Higieny; 1993, 44, 2-3; 213-219
0035-7715
Pojawia się w:
Roczniki Państwowego Zakładu Higieny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Zanieczyszczenia azotanami wody do picia na terenie wojewodztwa bydgoskiego
Autorzy:
Sinkiewicz, J
Doboszynska, B.
Powiązania:
https://bibliotekanauki.pl/articles/876107.pdf
Data publikacji:
1992
Wydawca:
Narodowy Instytut Zdrowia Publicznego. Państwowy Zakład Higieny
Tematy:
zdrowie czlowieka
azotany
woda pitna
wody powierzchniowe
woj.bydgoskie
zanieczyszczenia srodowiska
nadzor sanitarny
zanieczyszczenia wod
human health
nitrate
drinking water
surface water
Bydgoszcz voivodship
environment contaminant
sanitary control
water contaminant
Opis:
Przedstawiono wyniki badań nad występowaniem ponadnormatywnych ilości azotanów w wodzie do picia, dostarczanej przez wszystkie publiczne i o charakterze publicznym urządzenia wodne na terenie miast i wsi województwa bydgoskiego. Zobrazowano też sytuację w tym zakresie w odniesieniu do studni przydomowych.
The study was undertaken to evaluate the degree of drinking water pollution in the towns and countryside of the Bydgoszcz District, supplied by various installations, on the basis of the results of investigations of sanitary-epidemiological stations. Evaluation was done according to the state in 1985 as compared with that of 1981 to establish the eventual dynamics of the changes. The data presented in the tables indicate that the water supplied by the big water lines (public and institutional) does not contain nitrate quantities exceeding the norm (above 10 mg N/dm3). Their presence at a 20 mg N level/dm3 was found only in four (1.5%) lines supplying large state farms. Small installations were much more frequently polluted with nitrates, especially public wells and those of local institutions, a total of 8.8% in towns and as many as 17% in the country, where a tendency to deterioration of this state is also visible in contrast to the towns. Among the plants and institutions supplied by these water sorces the situation is most unfavourable in agriculture, schools, educational and food producing and distributing establishments. The nitrate concentration in the analysed water varied in genera] within the limits of 10-30 mg N/dm3, maximal amounts within 60-200 mg N/dm3, showing an about 50% decrease in the compared time periods. Nitrates occur most frequently and in highest concentrations in water of wells belonging to individual households which supply about 50% of the rural population and about 11% of town dwellers. The percent of these wells in which quantities of nitrates exceeding the norm were found (over 40%) does not reflect fully the true state because the up-to-date investigations concerned mainly installations with a good technical state and correct localisation. Systematic analysis of drinking water taking into account of the nirate content is indispensable for evaluation of the permanent situation which at present requires improvement of the local segment and individual water supply by the realisation of many technical and organisational undertakings.
Źródło:
Roczniki Państwowego Zakładu Higieny; 1992, 43, 3-4; 259-266
0035-7715
Pojawia się w:
Roczniki Państwowego Zakładu Higieny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Zawartosc i biokoncentracja rteci u muchomora czerwonawego [Amanita rubescens] z Polski Polnocnej
Content and bioconcentration of mercury by European blusher [Amanita rubescens] from Northern Poland
Autorzy:
Rompa, M
Bielawski, L.
Falandysz, J.
Powiązania:
https://bibliotekanauki.pl/articles/871707.pdf
Data publikacji:
2008
Wydawca:
Narodowy Instytut Zdrowia Publicznego. Państwowy Zakład Higieny
Tematy:
lasy
grzyby
zanieczyszczenia srodowiska
metale ciezkie
rtec
muchomor czerwonawy
Amanita rubescens
zawartosc rteci
kapelusze grzybow
trzony grzybow
zywnosc
zanieczyszczenia gleb
zanieczyszczenia zywnosci
Polska
forest
mushroom
environment contaminant
heavy metal
mercury
mercury content
mushroom cap
mushroom stem
food
soil contaminant
food contaminant
Polska
Opis:
Oznaczono zawartość rtęci ogółem w 45 owocnikach muchomora czerwonawego oraz podłożu glebowym, pozyskanych z trzech przestrzennie odległych od siebie miejscach w woj. pomorskim w latach 2006-2007. Zawartość rtęci oznaczono techniką zimnych par bezpłomieniowej absorpcyjnej spektroskopii atomowej (CV-AAS) z amalgamacją na wełnie ze złota. Muchomor czerwonawy wydajnie nagromadza rtęć a mediana współczynnika BCF tego metalu na zbadanym terenie wyniosła, odpowiednio, od 9,5 do 24 dla kapeluszy i od 6,1 do 15 dla trzonów. Dla zbadanych terenów wartości średnie stężenia rtęci ogółem mieściły w zakresie od 0,46 do 0,93 (0,098-3,2) µg/g m.s. w kapeluszach, od 0,27 do 0,65 (0,077-2,7) µg/g m.s. w trzonach i od 0,032 do 0,040 (0,0096-0,20) µg/g m.s. w substracie glebowym.
Total mercury content have been determined in 45 fruiting bodies of European Blusher (Amanita rubescens) and soil substrate collected from three spatially distant sites at the Pomorskie Voivodeship in 2006-2007. Mercury analysis carried out was by cold-vapour atomic absorption (CV-AAS) with amalgamation on golden wool. The European Blusher effectively accumulated mercury and median BCF values of this element ranged from 9.5 to 24 for the caps and from 6.1 to 15 for the stipes. For the areas surveyed mean concentration values of total mercury ranged from 0.46 to 0.93 (0.098-3.2) µg/g dw for the caps, from 0.27 to 0.65 (0.077-2.7) µg/g dw for the stipes and from 0.032 do 0.040 (0.0096-0.20) µg/g dw for soil substrate.
Źródło:
Roczniki Państwowego Zakładu Higieny; 2008, 59, 2; 139-146
0035-7715
Pojawia się w:
Roczniki Państwowego Zakładu Higieny
Dostawca treści:
Biblioteka Nauki
Artykuł

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