Informacja

Drogi użytkowniku, aplikacja do prawidłowego działania wymaga obsługi JavaScript. Proszę włącz obsługę JavaScript w Twojej przeglądarce.

English (EN)·Polski (PL)·Yкраїнський (UK)
Przejdź do strony domowej biblioteki Centralna Biblioteka Wojskowa Link otwiera się w nowym oknie Logo biblioteki Prolib Integro - strona głównaCentralna Biblioteka Wojskowa

Wyszukujesz frazę "total hardness" wg kryterium: Temat

  Lista filtrów
Wyrównaj
    Wyświetlanie 1-5 z 5
    Tytuł:
    Assessment of the water quality from hand dug wells and boreholes water in Rogo Local Government Kano State, Nigeria
    Autorzy:
    Getso, Balarabe Usman
    Tijjani, Aisha
    Ahmad, Mani
    Mustapha, Adamu
    Powiązania:
    https://bibliotekanauki.pl/articles/1177450.pdf
    Data publikacji:
    2018
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Dissolved Oxygen
    total acidity
    total hardness
    water pollution
    water quality
    Opis:
    Water quality analysis was conducted using physico chemical and biological parameters on water samples collected from boreholes (B1, B2, B3 and B4) and hand dug wells (W1, W2, W3 and W4) eight wards Rogo Town, Kano Sate, Nigeria in order to determine its suitability for drinking in enriched in WHO standards for drinking water. Fourteen (14) water quality parameters, namely pH, temperature, total alkalanity, total acidicity, dissolved oxygen (DO), 5-day biochemical oxygen demand (BOD5), total coliform, odour, taste, color, clarity, total hardness calcium (Ca),and magnesium (Mg). Results obtained showed that the mean pH readings ranges from 6.2 – 6.6 and temperature of the sample ranges from 24° C – 27° C. Total alkalinity ranges from 63-80mg/l, total acidity showed a great variation between the hand dug wells and borehole samples. DO concentrations of hand dug wells were less than that of boreholes and did not meet the WHO unit (5 -14 mg/l). The BOD5 of both boreholes and hand dug wells water sample were within the WHO standard (2 – 4 mg/l) for drinking, except borehole water sample from B4 with BOD value of 1.9. The water samples from both sources were odorless, colorless, tasteless and clear for consumption.
    Źródło:
    World Scientific News; 2018, 103; 242-249
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Physico-chemical parameter analysis of water in Musiri Taluk, Tamil Nadu, India
    Autorzy:
    Anbarasu, K.
    Anbuselvan, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/1119186.pdf
    Data publikacji:
    2017
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Musiri
    Physico-chemical parameters
    Total hardness
    Turbidity
    Water quality
    Opis:
    An analysis of the physico-chemical parameters of ground and surface water of Musiri Taluk (Tamil Nadu, India) were carried out to study the quality of water and suitability for domestic purpose. Cauvery water, well water and bore wells are the water resources of the study area. The parameters included pH, EC, TDS, Turbidity, Total hardness and content of Fluoride, Sulphate and Chloride were also assessed and compared with the standard values prescribed by BIS. The present investigation revealed that the quality of water of Cauvery water is suitable for drinking purposes, but the well water and bore well water samples are unfit for drinking and utility purpose.
    Źródło:
    World News of Natural Sciences; 2017, 6; 28-35
    2543-5426
    Pojawia się w:
    World News of Natural Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Study of the Hydrosystem and Environmental Monitoring of Water Quality of the Ponds and Water Sources in the National Dendrological Park "Sofiyivka" of the NAS of Ukraine
    Autorzy:
    Balabak, Oleksandr
    Muzyka, Hryhorii
    Balabak, Alla
    Vasylenko, Olha
    Nikitina, Olha
    Hnatiuk, Nataliia
    Rumiankov, Yurii
    Porokhniava, Olha
    Tsybrovska, Nadiia
    Hurskyi, Ihor
    Powiązania:
    https://bibliotekanauki.pl/articles/24201634.pdf
    Data publikacji:
    2023
    Wydawca:
    Polskie Towarzystwo Inżynierii Ekologicznej
    Tematy:
    water
    pH value
    total hardness
    chlorides
    sulfates
    nitrates
    nitrites
    Opis:
    At present, the problem of the availability of high-quality fresh water is urgent. The reservoirs from which water is extracted are running low. The amount of fresh water on the planet has decreased significantly in recent years. A big problem for the use of fresh water is its pollution. Groundwater remained relatively clean, but even when used, it needs to be controlled. Goal of research was the quality control of water from ponds and water sources in the National Dendrological Park (NDP) "Sofiyivka" of the National Academy of Sciences (NAS) of Ukraine in terms of physicochemical and bacteriological indicators and a study of the park's hydrosystem. When conducting research, potentiometric, gravimetric, titrimetric, colorimetric and spectrophotometric methods were used. The hydrosystem of the NDP "Sofiyivka" of the NAS of Ukraine, created during the period of its foundation, has basically retained its planning forms and all its artificial structures. The water system is an important environmental factor that contributes to the quality development of plants, and also has an aesthetic value. The analysis of the results of a study of the physicochemical and bacteriological composition of drinking water from the studied water catchments showed that the water is safe for consumption in terms of such indicators as the content of sulfates, nitrites, chlorides, but contains a significant amount of nitrates and has a high hardness, which can contribute to the development of a number of diseases. Long-term consumption of such water will have a negative impact on the human body. In all water samples from the capture, the growth of common coliforms in 100 cm3 and the presence of Escherichia coli were found, which is dangerous when drinking unboiled water and can bring to intestinal infectious diseases. According to the obtained experimental results of the quality of the studied water samples from the Krasnostavsky, Upper and Lower ponds of the NDP "Sofiyivka" NAS of Ukraine, the general physical and chemical indicators fully comply with the established standards, but the results of studies of the ponds in terms of bacteriological indicators, namely the index of lactose-positive E. coli indicate their significant excess and non-compliance with the standards in the Krasnostavsky and Verkhny ponds by 48 and 12 times, respectively.
    Źródło:
    Journal of Ecological Engineering; 2023, 24, 3; 178--187
    2299-8993
    Pojawia się w:
    Journal of Ecological Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Effectiveness of Melt-Blown Filter Cartridge and UV-C Rays on the Reduction of Total Coliform and Water Hardness in Production Process Water
    Autorzy:
    Fikri, Elanda
    Putri, Nursyifa Yuliani
    Djuhriah, Nanny
    Hanurawaty, Neneng Yetty
    Khair, Amar Sharaf Eldin
    Powiązania:
    https://bibliotekanauki.pl/articles/2086408.pdf
    Data publikacji:
    2022
    Wydawca:
    Polskie Towarzystwo Inżynierii Ekologicznej
    Tematy:
    melt blown
    filter cartridge
    ultraviolet C
    UVC
    total coliform
    water hardness
    Opis:
    Water is one of the humans’ basic needs that are essential in daily lives. The water use related to the production of the food processing industry must at least meet the quality standards required for drinking water. The Production process water is obtained from the artesian well that has been treated with a physical treatment process. The microbiological examination result of total Coliform is 8.6 MPN/100 ml meaning that it does not meet the quality standard requirements, which is 0 MPN/100 ml (The Minister of Health Regulation Number 492 of 2010, concerning Drinking Water Quality Requirements), it is necessary to treat the production process water using a Melt Blown Filter (MBF) and UV-C rays. The purpose of this study was to determine the differences in the variation of the 1, 3, and 5-micron of Melt Blown Filter cartridge 10” in reducing the amount of total Coliform, as well as the water hardness and their effect on disinfection using UV-C rays. The type of research used is experimental research with a pretest-posttest without control research design. There is a reduction in the average total Coliform after the treatment using a Melt Blown Filter, with a result of 1, 3, and 5-micron as 2.95 MPN /100ml, 3.61 MPB/100 ml, and 7.31 MPN/100 ml with a percentage reduction of 100%, 94.5%, and 82.4%, respectively. The average total Coliform using the Melt Blown Filter equipped with the UV-C rays treatment resulted in a reduction of 1, 3, and 5-micron as 2.95 MPN/100 ml, 3.95 MPN/100 ml, 8.88 MPN/100 ml respectively, with a reduction percentage of 100%, for each treatment. The data analysis for total coliform using the One-Way ANOVA test resulted in a pvalue of 0.001, the effective variation obtained is 1-micron MBF equipped with UV-C rays. The analysis of results pertaining to the water hardness data showed that the use of Melt Blown Filter could not reduce water hardness, but the UV-C rays could still be used accordingly. The data analysis for water hardness was performed using KruskalWallis with a p-value of 0.820, meaning that there are no differences in Melt Blown Filter variation on the results of total water hardness value.
    Źródło:
    Journal of Ecological Engineering; 2022, 23, 4; 181--190
    2299-8993
    Pojawia się w:
    Journal of Ecological Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analysis of the wood properties of Dicorynia guianensis Amsh. in the context of using in outdoor architecture
    Autorzy:
    Ligęza, Adrianna
    Jankowska, Agnieszka
    Powiązania:
    https://bibliotekanauki.pl/articles/2171757.pdf
    Data publikacji:
    2022
    Wydawca:
    Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
    Tematy:
    Dicorynia guianensis Amsh.
    angélique
    Guayana teak
    bangkirai
    yellow balau
    Brinell hardness
    CIELab
    colour change
    total and partial shrinkage
    wood aging
    wood weathering
    Opis:
    Analysis of the wood properties of Dicorynia guianensis Amsh. in the context of using in outdoor architecture. This article deals with the analysis angélique wood (Dicorynia guianensis Amsh.) properties to verify suitability for use in the arrangement of external architecture such as the construction of terraces. Particularly, tests included determination of hardness by the Brinell method and total and partial shrinkage. The presented characteristic of properties was complemented by the analysis of wood colour stability during exposition to natural weathering factors for six months. Changes of particular colour parameters (lightness L*, chroma C*, hue h) were determine as well as the total colour change ΔE*. The colour stability was examined on untreated wood surface as well as on wood finished with clear and colouring oils. It was found that the angélique wood belongs to the group of very heavy wood (specific gravity 807 kg/m3) and is characterized by the favourable technical parameters, primarily the high hardness (average hardness 45,64 MPa). Furthermore, the angélique wood is the wood of average shrinkage (average total shrinkage 14,37%). Dimensional stability does not differ from the properties of wood commonly and successfully used for wooden external construction. The results showed that during external exposition angélique wood became darker. Using wood surface protection preparations such as oils resulted in the slowing down the weathering processes effects.
    Analiza właściwości drewna Dicorynia guianensis Amsh. w kontekście jego wykorzystania w architekturze zewnętrznej. W ramach pracy dokonano analizy właściwości drewna angélique (Dicorynia guianensis Amsh.) w celu weryfikacji przydatności do zastosowania w aranżacji architektury zewnętrznej, takiej jak budowa tarasów. Zakresem badań objęto określenie twardości metodą Brinella oraz skurczu całkowitego i częściowego drewna. Przedstawiona charakterystyka właściwości została uzupełniona o analizę stabilności barwy drewna w czasie jego półrocznej ekspozycji na naturalne czynniki atmosferyczne. Określono zmiany poszczególnych parametrów barwy (jasność L*, nasycenie C*, odcień h) oraz całkowitą zmianę barwy ΔE*. Stabilność koloru badano na powierzchni drewna niczym niezabezpieczonego, a także na drewnie pokrytym olejem bezbarwnym i barwiącym. Stwierdzono, że drewno angélique należy do grupy drewna bardzo ciężkiego (gęstość średnia 807 kg/m3) i charakteryzuje się korzystnymi parametrami technicznymi, przede wszystkim wysoką twardością (średnia twardość 45,64 MPa). Ponadto drewno angélique jest średniokurczliwym (średni skurcz całkowity 14,37%). Stabilność wymiarowa nie odbiega od właściwości drewna powszechnie i z powodzeniem stosowanego w drewnianych konstrukcjach zewnętrznych. Wyniki pokazały, że podczas ekspozycji zewnętrznej drewno angélique ciemnieło. Stosowanie preparatów do ochrony powierzchni drewna takich jak oleje spowodowało spowolnienie efektów procesu starzenia, spowodowane czynnikami zewnętrznymi.
    Źródło:
    Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology; 2022, 119; 57--70
    1898-5912
    Pojawia się w:
    Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-5 z 5

      Ta witryna wykorzystuje pliki cookies do przechowywania informacji na Twoim komputerze. Pliki cookies stosujemy w celu świadczenia usług na najwyższym poziomie, w tym w sposób dostosowany do indywidualnych potrzeb. Korzystanie z witryny bez zmiany ustawień dotyczących cookies oznacza, że będą one zamieszczane w Twoim komputerze. W każdym momencie możesz dokonać zmiany ustawień dotyczących cookies