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Tytuł:
Influence of Ozone Aeration on Toxic Metal Content and Oxygen Activity in Green Waste Compost
Autorzy:
Gliniak, M.
Grabowski, Ł
Wołosiewicz-Głąb, M.
Polek, D.
Powiązania:
https://bibliotekanauki.pl/articles/124489.pdf
Data publikacji:
2017
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
compost
ozone
toxic metals
Opis:
This paper presents the results of work on the reduction of toxic metal content while decreasing its oxygen activity. During the study the effects of different doses of ozone in the air used for aeration of the stabilized compost in the first post-thermophilic phase were analyzed. The results showed the possibility of reducing the concentrations of toxic metals and decrease the activity of oxygen by up to 30%, compared to traditional stabilized compost aeration system without using ozone.
Źródło:
Journal of Ecological Engineering; 2017, 18, 4; 90-94
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
„Emotional defeats” of parents
Autorzy:
Mastalski, Janusz
Powiązania:
https://bibliotekanauki.pl/articles/668225.pdf
Data publikacji:
2017
Wydawca:
Uniwersytet Papieski Jana Pawła II w Krakowie
Tematy:
parents
emotions
defeats
toxic tactics
Opis:
In a family all kinds of conflicts and problems occur that affect both the parents and their children. The conflicts which are especially painful are those related to the inability of parents to deal with their own emotions and feelings. In this article, after clarifying the main concepts, the author first discusses the typical features of parental emotions and feelings (creativity, proximity, intensity) in order to identify the reasons for “emotional defeats” (the inability to express emotions, the inability to recognize emotions, emotional liability, “getting stuck” in some emotion, harmful suppression of emotions, masking of one’s feelings, stress, fatigue, addiction). Secondly, the author describes their effects (codependency, emotional distance, weakening of emotional ties, superficiality, impaired communication, “internal emigration”, family identity crisis). At the end, he discusses toxic tactics in dealing with these defeats (suppression; avoidance; pretending they do not exist; transfer of emotions on others; resignation in coping with emotions). Consequentially, these tactics lead them to formulate remedies. A discussion of these solutions concludes the article.
Źródło:
The Person and the Challenges. The Journal of Theology, Education, Canon Law and Social Studies Inspired by Pope John Paul II; 2017, 7, 1
2391-6559
2083-8018
Pojawia się w:
The Person and the Challenges. The Journal of Theology, Education, Canon Law and Social Studies Inspired by Pope John Paul II
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
John William Trevan’s concept of Median Lethal Dose (LD50/LC50) – more misused than used
Autorzy:
Pillai, S.K.
Kobayashi, K.
Michael, M.
Mathai, T.
Sivakumar, B.
Sadasivan, P.
Powiązania:
https://bibliotekanauki.pl/articles/2098545.pdf
Data publikacji:
2021
Wydawca:
Instytut Medycyny Wsi
Tematy:
lethal dose
toxic substance
acute toxicity
Opis:
Introduction: Median lethal dose (MLD) has been a controversial subject among biologists and animal ethicists since its inception in 1927 by Trevan. Toxicologists use MLD (LD50) as the first step to assess the toxicity of a substance. Animal ethicists criticize LD50 tests because animals suffer pain, and LD50 is irreproducible. The disadvantage of classifying chemicals based on LD50, the importance of the ‘characteristics’ proposed by Trevan, and the ideal mortality range for determining the best estimate of LD50 are also discussed. Objective: The aim of this review was to understand Trevan’s concept of LD50 and the method of Litchfield and Wilcoxon (L and W), and Finney’s probit analysis for LD50 determination Materials and method: A literature survey was conducted using Google search and Pubmed. Simulated data set was used for identifying the ideal mortality range for calculating the ‘best estimate’ of LD50. Brief description of the state of knowledge: After Trevan, the extensively used classical methods for LD50 determination are Finney’s probit analysis and the L and W method. Animal ethicists questioned LD50, because of its irreproducibility. Presently used methods for LD50 tests do not provide information on the dose-response, hence assessing the complete spectrum of toxicity is not possible. However, LD50 is used to classify chemicals. Conclusions: 'The 'characteristic' is more specific than the slope or LD50 of a dose-response curve. LD50 does not manifest the exact nature of the toxicity of a substance; hence, classifying chemicals based on LD50s may have little relevance
Źródło:
Journal of Pre-Clinical and Clinical Research; 2021, 15, 3; 137-141
1898-2395
Pojawia się w:
Journal of Pre-Clinical and Clinical Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Determination of metals in sea water of the Baltic Sea in Międzyzdroje
Autorzy:
Daniszewski, P.
Powiązania:
https://bibliotekanauki.pl/articles/412273.pdf
Data publikacji:
2013
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
toxic heavy metals
sea water
Baltic Sea
Opis:
The present research work deals with the quantification of toxic heavy metals in the water samples collected from sea water in Międzyzdroje. While the annual average concentration of Cadmium was calculated as 0.44 ppm in 2008 of the year and 0.46 ppm in 2009 of the year. The values obtained were found to be below the permissible limit of 2.0 ppm set for inland surface water. While the annual average concentration of Chromium was calculated as 2.67 ppm in 2008 of the year and 2.64 ppm in 2009 of the year. Which was very much above the permissible limit of 0.1 ppm set for inland surface water. The observed annual average concentration of Copper in the water was 0.08 ppm in 2008 of the year and 0.05 ppm in 2009 of the year, which was below the permissible limit of 3.0 ppm set for inland surface water. While the annual average concentration of Mercury was calculated as 0.05 ppm in 2008 of the year and 0.05 ppm in 2009 of the year, which was very much above the maximum limit of 0.01 ppm set for inland surface water. The annual average concentration of Nickel in the water samples was observed to be 2.47 ppm in 2008 of the year and 2.70 ppm in 2009 of the year, which is close to the limit of 3.0 ppm set for inland surface water. The annual average concentration of Lead in the water samples was observed to be 0.06 ppm in 2008 of the year and 0.05 ppm in 2009 of the year, which is above the permissible limit of 0.1 ppm set for inland surface water. The results of the present investigation indicate that the annual average concentration of Zinc in water samples was 3.45 ppm in 2008 of the year and 3.73 ppm in 2009 of the year, which is above the permissible limit of 5.0 ppm set for inland surface water.
Źródło:
International Letters of Chemistry, Physics and Astronomy; 2013, 13; 13-22
2299-3843
Pojawia się w:
International Letters of Chemistry, Physics and Astronomy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The investigations of fume emissions of engines
Autorzy:
Żółtowski, B.
Powiązania:
https://bibliotekanauki.pl/articles/243973.pdf
Data publikacji:
2008
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
combustion engines
toxic fume components
environmental protection
Opis:
The results of the investigations of the post and exploitation emissions of the harmful components of the fumes of engines from CI were introduced In the work. Obtained results were subjected to a statistical study according to new computer procedures. Qualitative and quantitative reports were established for the level and kind of emission in reference to the changes of the state of studied engines. The need for detailed analysis ofphenomena changes of state destruction of the examined engines, with a vast number of measuring data, requires the use of specialized methods of statistical concluding. The presented results were submitted to statistical analysis, where the methods OPTIMUM and AVD were used, as well as correlation and regression methods. It gave the possibility of quality and quantity comparison of results of fumes contents from stationary tests and exploitation researches. The results of this research allow a model (mathematical relations) determination of relations between smoking and the quantity of toxic fume components of a high-pressure engine. The performed tests and analyses in his work's researches indicate tothe conclusions: in the engine of self-acting ignition (CI) the emission of carbon oxide (CO), hydrocarbons (HC) and smoking are considerable, especially during start-up and engine warming; along with the decrease of environment temperature, the emission of CO, HC and smoking increase, whilst the quantity of NOx goes down, providing premises confirming the specified regulations of forming dangers on the side of engine fumes emission; the phases of start-up and warming up of the CI engine are characterized by increased fuel usage and increased emission of carbon oxide - CO, giving information and sensitising vehicle users to these harmful for the engine working conditions, the influence of environment temperature on the emission and smoking of fumes during hot start-ups is weaker than during cold start-ups.
Źródło:
Journal of KONES; 2008, 15, 2; 579-592
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of the accidental release of chlorine
Autorzy:
Stolecka, Katarzyna
Powiązania:
https://bibliotekanauki.pl/articles/88684.pdf
Data publikacji:
2019
Wydawca:
Stowarzyszenie Menedżerów Jakości i Produkcji
Tematy:
chlorine
hazard zones
toxic
chlor
strefy zagrożenia
Opis:
Due to its properties, chlorine is one of the highly toxic substances used by humans. This gas attacks the respiratory system, eyes and skin. In higher concentrations, its inhalation leads to death. It is mainly used in water treatment plants where it guarantees a bacteriologically safe water in water supply systems. It is also used as a disinfectant and bleaching agent. The use, transport and storage of chlorine may pose serious hazard associated with its uncontrolled release from technological installations or tanks. The level of this threat will depend on the run of the release scenario or meteorological conditions. The article presents an analysis of the hazards associated with the uncontrolled release of chlorine. The ranges of zones with dangerous level of gas concentration are presented as a result of its instantaneous and continuous release.
Źródło:
System Safety : Human - Technical Facility - Environment; 2019, 1, 1; 149-155
2657-5450
Pojawia się w:
System Safety : Human - Technical Facility - Environment
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Beneficiation of arsenic bearing complex sulphide ore by flotation
Autorzy:
Gul, A.
Bulut, G.
Sirkeci, A. A.
Powiązania:
https://bibliotekanauki.pl/articles/110834.pdf
Data publikacji:
2013
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
arsenic
non-toxic depressants
sulphide minerals
flotation
Opis:
In this study beneficiation of a sulphide ore from the Gümüşhane-Black Sea Region of Turkey was investigated. Detailed flotation studies were carried out with the ore sample which contained 2.95% Pb, 6.72% Zn and 0.32% Cu. Mineralogical analyses showed that the sample includes pyrite, galena, sphalerite, chalcopyrite, tennantite, cerussite, anglesite and smithsonite. On the other hand, hematite, goethite, limonite, calcite and quartz were determined as gangue minerals. Selective sulphide concentrates with low arsenic content were tried to be produced by froth flotation. Individual concentrates of Pb, Zn and Cu assayed 67.54% Pb, and 61.49% Zn and 23.31% Cu where corresponding recoveries were 73.0% and 77.1% and 38.7%, respectively. Arsenic contents were less than 2000 ppm in the lead and zinc con-centrates. Copper concentrate assayed 5.03% As since the major copper minerals were in tennantite form (copper arsenic sulphide mineral). In flotation tests, non-toxic reagents such as metabisulphite, caustified starch, and activated carbon were used to depress minerals in relevant circuits.
Źródło:
Physicochemical Problems of Mineral Processing; 2013, 49, 1; 203-212
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Use of Phytomeliorant Plants for Waste Water Purification
Autorzy:
Issayeva, Akmaral U.
Yeshibayev, Arystanbek A.
Tleukeyeva, Assel Ye.
Issayev, Yerzhan B.
Powiązania:
https://bibliotekanauki.pl/articles/1955577.pdf
Data publikacji:
2021
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
phytomeliorant plant
wastewater
purification
toxic ingredient
phytoremediation
Opis:
The use of phytomeliorant plants is one of the promising trends in environmental biotechnology to purify waste water. The study was carried out to understand the phytomeliorative qualities of plants of the indigenous flora of the Turkestan Region under controlled conditions and to develop a method for treating wastewater. It was established that the use of a three-stage treatment of municipal wastewater using phytomeliorant plants: Ceratophуllum demersum L., Potamogeton trichoides Cha. Et Schlecht., Potamogeton pectinatus L., Potamogeton natans L.; Cardamine densiflora N. Gontsch., Sium sizaroideum DC.; Veronica beccabunga L, Veronica anagallis aquatica L. and Azolla caroliniana Willd for 30 days of the controlled experiment reduces the content of organic and mineral ingredients to the MPC values. A method for phyto-meliorative wastewater treatment of one of the sanatoriums in the south of Kazakhstan was developed and carried out in multi-stage bioponds, where water was purified from mineral and organic compounds by 94.9 ± 8.3 – 98.9 ± 7.8% in 12 days. In this study, first of all, nitrogenous compounds were utilized, then there was an active absorption of mineral ions and residual organic matter by plants. In conclusion, significant purification of wastewater was achieved by using indigenous phytomeliorant plants in much shorter time period.
Źródło:
Journal of Ecological Engineering; 2021, 22, 9; 48-57
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Concentration of Toxic Metals in Agricultural Land and Wheat Culture (Triticum Aestivum L.)
Autorzy:
Dreshaj, Adem
Millaku, Bedri
Gashi, Arian
Elezaj, Elvis
Kuqi, Bekë
Powiązania:
https://bibliotekanauki.pl/articles/2027787.pdf
Data publikacji:
2022
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
toxic metals
national road
wheat
vehicle pollution
Opis:
Concentrations of heavy metals in the soil such as: (Pb, Cd, Zn and Cr), play a role in contamination of agricultural crops such as wheat (Triticum aestivum L.). Roads in the Republic of Kosovo are congested with traffic; in addition, over 55% are more than 20 years old. The agricultural land near roads in Kosovo is cultivated with agricultural products, especially wheat. This study aimed to investigate the concentration of toxic metals in soil and wheat crops due to vehicle emissions. In this research are examined the physico-chemical factors that affect the mobility of metals in the soil of the research area as; pH, concentration of organic carbon and heavy metals such as: (Pb, Cd, Zn and Cr). Analytical research shows that the content of toxic metals decreases with increasing distance or along highways. The concentration tests of toxic metals near roads and lands planted with analyzed agricultural crop of corn showed that heavy metal deposits also depend on atmospheric conditions and emissions from vehicle traffic.
Źródło:
Journal of Ecological Engineering; 2022, 23, 2; 18-24
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Groundwater Contamination and Health Risk Evaluation of Naturally Occurring Potential Toxic Metals of Hatiya Island, Bangladesh
Autorzy:
Rahman, Mahfuzur
Khan, Md. Sadril Islam
Hossain, Mohammad Sabbir
Hossain, Md. Imam Shohel
Hasan, Mahmudul
Hamli, Hadi
Mustafa, M. Golam
Powiązania:
https://bibliotekanauki.pl/articles/2105279.pdf
Data publikacji:
2022
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
drinking water
toxic elements
pollution indices
Hatiya Island
Opis:
Groundwater meets the majority portion of drinking water needs, particularly in the rural area of Bangladesh. Groundwater has been continuously contaminated by potentially harmful metals as a result of natural processes as well as some anthropogenic activities, creating a variety of health impacts. The current research aimed to evaluate the naturally occurring level of metal contamination and the human health risk associated with deep groundwater in the Hatiya Island. Because of the arsenic, iron, and salinity problem in shallow groundwater, the inhabitants of the Hatiya Island use deep groundwater. During the field investigation, no shallow tubewells were observed; therefore, only deep groundwater samples were collected. The total sample size collected throughout the Hatiya island was 17. Five metals (Zn, Fe, Mg, Mn, and Cu) were analyzed using an Atomic Absorption Spectrophotometer (AAS). The concentrations of studied potential risky metals were ranked as follows: Mg > Zn > Fe >Mn> Cu. The detected values of all metals except Fe were found within the drinking water limits of WHO (2017), BIS (2012), and BDWS (1997), where only 29.41% of the Fe sample exceeded the standard drinking limits. According to the metal evaluation index (MEI) and degree of contamination (Cd), the groundwater of the study area is free from contamination but the metal pollution index (MPI) and nemerow pollution index (NI) exhibited little pollution in the mid-western part of the study area. The hazard quotient (HQ) values revealed no oral and dermal health risk for individual metals (Cu, Zn, Fe, Mn). On the other hand, the hazard index (HI) values exhibited no risk for combined metals as none of the values exceeded the safety limit value of 1. According to the HQ and HI results, the deep groundwater on Hatiya Island is non-carcinogenic and risk-free for children and adults. However, children were more susceptible to oral health risks than adults. In contrast, adults were more vulnerable to dermal health risks than children.
Źródło:
Journal of Ecological Engineering; 2022, 23, 6; 223--236
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Muzyczno-synestezyjna przestrzeń Mariny Cwietajewej w eseju autobiograficznym „Matka i muzyka”
Marina Tsvetaeva’s Musical and Synaesthetic Space in My Mother and Music, Her Autobiographical Essay
Autorzy:
Ojcewicz, Grzegorz
Powiązania:
https://bibliotekanauki.pl/articles/444676.pdf
Data publikacji:
2020-06-01
Wydawca:
Uniwersytet Warmińsko-Mazurski w Olsztynie
Tematy:
Marina Tsvetaeva
music
synesthesia
childhood
poetry
toxic mother
Opis:
The author presents Marina Tsvetaeva’s musical and synaesthetic space on the basis of My Mother and Music, her autobiographical essay. Synaesthesia, although present in the life of Tsvetaeva as a young child and adult poet, is not especially depict-ed in this particular piece of work. The writer chose her memories which encompass a significant period of time from her birth to her 42nd birthday as her main narrative focus. The musical sphere of the young child was presented through the piano and its attributes (the keyboard, pedals, music stand, metronome, notes, piano stool), which were a source of various – both positive and negative – experiences for this sensitive girl. Marina Tsvetaeva’s mother, unfulfilled as a pianist, undoubtedly played a toxic role in her musical education. Maria Tsvetaeva “drowned and killed her daughters with music”, making them feel an organic resistance towards required physical and mental efforts far too great for their age. The situation changed after her mother’s death when Marina could pour all her love for music into incredibly original lyric poetry, becoming one of the greatest writers of the 20th century.
Źródło:
Acta Neophilologica; 2020, XXII/1; 149-170
1509-1619
Pojawia się w:
Acta Neophilologica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Performance of Avicennia alba and Rhizophora mucronata as Lead Bioaccumulator in Bee Jay Bakau Resort, Indonesia
Autorzy:
Mahmudi, Mohammad
Adzim, Aliyyil
Fitri, Difia Helsa
Lusiana, Evellin Dewi
Buwono, Nanik Retno
Arsad, Sulastri
Musa, Muhammad
Powiązania:
https://bibliotekanauki.pl/articles/1839104.pdf
Data publikacji:
2021
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
Avicennia alba
Rhizophora mucronata
lead accumulation
toxic metals
Opis:
Mangroves are a crucial ecosystem in coastal areas and serve a significant ecological function. However, this ecosystem is under the continuous pressure of anthropogenic activities which create toxic contaminants, such as heavy metals. The presence of marine ports and electric steam power plants next to Bee Jay Bakau Resort (BJBR) Mangrove Forest may worsen the heavy metal pollution, especially in the case of non-essential metals like lead (Pb). The vegetation in mangrove ecosystems can help store and trap this contaminant. Therefore, the objective of this study was to determine the potency of the Avicennia alba and Rhizopora mucronata mangrove species, which dominate the mangrove vegetation in BJBR Mangrove Forest, as Pb phytoremediation agents. The samples were taken from the sediment, roots, stems, and leaves of the mangrove trees. The results showed that the Pb found in the sediment of these species ranged from 10.323 to 11.071 ppm, while the Pb concentration in the mangrove parts was less than 1 ppm with the order roots > stems > leaves. Furthermore, the statistical analysis indicated that there were no statistically significant differences in the Pb values across sites and species. Moreover, the BCF, BAC, and TF in this study were less than 1, making the observed mangrove species unsuitable for phytoextraction or phytostabilization.
Źródło:
Journal of Ecological Engineering; 2021, 22, 2; 169-177
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Toxic Elements in Mountain Soils (Little Beskids, Polish Carpathians)
Autorzy:
Jaguś, Andrzej
Skrzypiec, Mariusz
Powiązania:
https://bibliotekanauki.pl/articles/124957.pdf
Data publikacji:
2019
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
toxic elements
mountain areas
soil contamination
soil acidity
Opis:
The research consisted in the analyses pertaining to the occurrence of elements regarded as toxic (Zn, Cu, Ni, Cr, As, Pb, Cd, Hg), the presence of which in the environment is mainly associated with economic-industrial activities in mountain soils. The research area of about 5 sq. km. included the hilltops and south-western slopes of the Magurka Wilkowicka massif. The massif is situated on the western edge of the Little Beskids near the area of Bielsko-Biała city. The concentrations of elements were measured in 50 soil samples taken from three zones: at the foothill of the massif (arable fields), on its slopes (forest areas) and on the hilltop (grassland). Additionally, the pH of the soil samples was determined. The research showed that zinc and, to a lesser degree, copper and nickel, occurred in the highest concentrations at the foot of the massif, near built-up areas, while the highest concentrations of arsenic and lead were detected in the hilltop part of the grassland. The concentrations of chromium, cadmium and mercury did not differ spatially. The analysed elements, especially zinc and lead, often occurred in the concentrations higher than those regarded as natural. It is a disturbing fact combined with serious acidity of the analysed soils (almost 60% of the samples were very acid soils), which may increase mobility of metals. The research shows that the soil environment of the Polish Carpathians may be contaminated with toxic elements not only in the neighbourhood of built-up areas, but also in the undeveloped land.
Źródło:
Journal of Ecological Engineering; 2019, 20, 1; 197-202
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Diesel engines with respect to Euro 6 and Bin5/Lev II emission limits
Autorzy:
Brzeżański, M.
Powiązania:
https://bibliotekanauki.pl/articles/247277.pdf
Data publikacji:
2011
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
combustion engines
emission of toxic components of exhaust gases
Opis:
The article presents future requirements concerning emission of toxic components of exhaust gases valid for Diesel engine passenger cars. Questions connected with fulfilment of these standards were discussed. Chosen structural solutions permitting fulfilment of future requirements concerning emission were presented. In Europe passenger cars equipped with Diesel engines which get the homologation certificate for the first time the emission limit determined by the standard Euro 6 will be binding from year 2014. The relation to the at present binding limit Euro 5 emission of nitric oxides, the sum of hydrocarbons and nitric oxides as well as emission of particulate matter must be reduced. On the European market use could be made of experience gained during exploitation heavy duty vehicles in which decrease in nitric oxides emission is achieve by means of selective catalytic reduction (SCR). A more complex system of emission appraisal is valid in USA and especially in the states where the so called Californian standards were adopted. On the example of Volkswagen 2.0 TDI engine it was shown that in modern constructions of combustion engines there is still a large developmental potential. In this case the development went in the direction of fulfilment of new very requiring standards of emission of toxic components of exhaust gases. Well known in Europe 2.0 TDI engine which in its new version fulfils the most strict emission standards BIN5/LEV II constitutes the structural basis of the drive unit designed for the American market. Under such conditions the firm Volkswagen belongs to the small number of cars producers who for a couple of year have offered with success, passenger cars equipped with Diesel engines.
Źródło:
Journal of KONES; 2011, 18, 4; 33-40
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Toxic metals (Cd, Pb) in flatfish, mollusc Macoma balthica, water and sediments from the southern Baltic Sea
Autorzy:
Polak-Juszczak, L.
Powiązania:
https://bibliotekanauki.pl/articles/1190197.pdf
Data publikacji:
2017
Wydawca:
Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
Tematy:
Baltic Sea
toxic metals
flatfish
Macoma balthica
sediment
water
Opis:
Environmental pollution is a worldwide problem, with toxic metals being among the most noxious pollutants. Aquatic organisms can accumulate toxic elements from their environment through different pathways, including water, diet and sediments. The aim of the study was to determine the distribution of toxic metals (Cd and Pb) in tissues of three species of flatfish (Platichthys flesus, Pleuronectes platessa, Scophthalmus maximus), and in their environment (water, sediment and their prey mollusc Macoma balthica) in four regions of the southern Baltic Sea, in order to identify the most important pathways of metal uptake in these fish. The concentrations of toxic metal were measured in a graphite furnace by atomic absorption spectrometry. Toxic metal concentrations in flatfish liver were significantly higher than in the muscle tissue. The liver was the target organ for Cd and Pb accumulation. The flatfish liver, M. balthica, sediment, and water from the Gulf of Gdansk contained higher level of Pb than did the samples from the central Baltic Sea coast. The Pb concentrations in the liver of P. flesus and P. platessa showed positive correlations with Pb in the soft tissue of M. balthica, sediment and sea water. The high correlation coefficient values for Pb suggest that flatfish took up this metal through the food chain from molluscs. In turn, M. balthica took up Pb and Cd from sediment and water, which was confirmed by the high correlation coefficients for these metals between this mollusc and sediment and water. The positive correlations for concentrations Pb and Cd in sediment and in water indicate the next stage of the pathway along which the metals travel in the Baltic Sea environment.
Źródło:
Journal of Elementology; 2017, 22, 2; 487-496
1644-2296
Pojawia się w:
Journal of Elementology
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 249

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