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Wyszukujesz frazę "water parameters" wg kryterium: Temat

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    Wyświetlanie 1-5 z 5
    Tytuł:
    Pore Water Nutrient Profile in the First and Second Transitional Season in Teluk Ciletuh, Sukabumi District, West Java
    Autorzy:
    Efendi, Hilmi Miftah Fauzi
    Yuniarti, Yuniarti
    Syamsudin, Mega Laksmini
    Ihsaan, Yudi Nurul
    Powiązania:
    https://bibliotekanauki.pl/articles/1193298.pdf
    Data publikacji:
    2021
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Ciletuh Bay
    Nutrients
    Transitional Season
    Water Quality Parameters
    Opis:
    The purpose of this research conducted between October 2018 and April 2019 was to determine the effect of the first and second transitional season on the nutrient profile in Ciletuh Bay. The data used in this research and directly taken from the research site were seawater quality parameters, analysis of granulometry sample and analysis of nutrient profile, while all data processing was conducted in a laboratory. The method used in this study was purposive sampling. The results of this research indicated that the nutrient profile in the first transitional season is higher than the second transition season. This is due to the introduction of organic matter into the waters. From this research it can be concluded that the first transitional season affects the concentration of nutrient in Ciletuh Bay.
    Źródło:
    World Scientific News; 2021, 153, 2; 43-54
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Composite Barrier to Control the Corrosion of Mild Steel in Oil Well
    Autorzy:
    Singh, Rajesh Kumar
    Thakur, Manjay Kumar
    Kumar, Parshun
    Powiązania:
    https://bibliotekanauki.pl/articles/1030680.pdf
    Data publikacji:
    2020
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    HCl
    Mild steel
    Saline water
    composite barrier
    filler
    thermal parameters
    Opis:
    Mild steel is a very important engineering metal. Petrochemical industries are used bulk amount for their various purposes like recovery of crude oil, refinery units and transportation. Crude oil is a very highly viscous liquid for the opening of the month well strong HCl acid and saline water is used. They produce hostile environment of mild steel. Gaseous substances like CO2 and SO2 gases are found into the well of petroleum. Large amount of saline water are used during recovery of crude oil in this water CO2 and SO2 are dissolved to produce H2CO3 and H2SO4. These acids create an acidic medium of mild steel. Saline waters have possessed Cl¯ ions. It produces ambient environment for mild steel. The solution of salty water contains dissolve oxygen which develop corrosive environment of mild steel. These major corrosive substances are available during recovery of crude oil and they form corrosion cell with base metal. Metal produces galvanic, pitting, stress, crevice, intergranular corrosion. Nanocaoting and filler methods are used to protect metal in such un-friendly environment. The corrosion rate of metal was calculated by weight loss experiment in absence and presence of nanocoating and filler materials. The synthesized organic compound octahydrodibenzo[a,d][8]annulene-5,12-dihydrazone is applied for nanocoating and MgS as filler. The coating and filling works were completed by chemical vapour deposition and nozzle spray method. Potentiostat used for determination corrosion potential and corrosion current density. The surface adsorption was studied by thermal parameters like activation energy, heat of adsorption, free energy, enthalpy and entropy. The thermal parameters results were shown that coating and filler compounds were adhered with base metal by chemical bonding. The thermal results were calculated by Arrhenius equation and Langmuir isotherm. The coating and the filler substance formed composite barrier with metal and developed a protective barrier for the corrosive substances.
    Źródło:
    World Scientific News; 2020, 139, 2; 155-172
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Spatial Variability Analysis of Some Groundwater Physico-Chemical Parameters in Parts of Akwa-Ibom State, Nigeria
    Autorzy:
    Emujakporue, Godwin O.
    Ngwueke, Marcel I.
    Powiązania:
    https://bibliotekanauki.pl/articles/1191777.pdf
    Data publikacji:
    2016
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Water analysis
    Akwa Ibom
    Physico-chemical parameters
    Semi-variogram
    Kriging
    Opis:
    The groundwater physico-chemical parameters of Parts of Akwa Ibom state and their spatial distribution have been examined in this study. The physico-chemical parameters analysed are Ph, total dissolved solids, electrical conductivity and water hardness. The average pH, electrical conductivity, water hardness and total dissolved solids obtained are 6.4, 163.4242 μS/cm, 83.81 mg/l and 90.5 mg/l respectively. The computed values are within the permissible limit set by World Health Organisation (WHO). Semi-variogram and ordinary kriging were used for the spatial distribution analysis. The semi variogram of the pH, total dissolved solids, electrical conductivity and water hardness were model with Gaussian, spherical, linear functions respectively. The pH map is dominated with values ranging from 6.2 to 6.6 while the total dissolved solids map is associated mainly with values ranging from 90 to 95 mg/l. The water hardness and electrical conductivity values increases from central part toward the west and eastern regions. The geostatical modelling has been used to estimate the values of the parameters at unsampled points.
    Źródło:
    World Scientific News; 2016, 50; 20-32
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Elucidation of tidal spatial-temporal variation of physico-chemical and nutrient parameters of estuarine water at South Gujarat
    Autorzy:
    Desai, Nisheeth C.
    Kukadiya, Nipul B.
    Mehta1, Jignasu P.
    Godhani, Dinesh R.
    Lakhmapurkar, Jayendra
    Dave, Bharti P.
    Powiązania:
    https://bibliotekanauki.pl/articles/1030123.pdf
    Data publikacji:
    2020
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Estuary water
    Nutrients
    Physico-chemical parameters
    Principal component analysis
    Tidal variation
    Opis:
    In the present study, the four estuaries were selected from the South Gujarat region to appraise the impact of industrial pollution in the estuarine water samples. The study focused on the tidal variation of nutrients, which disclosed that concentrations of NO2–N, NO3–N, NH4–N, TN, and reactive silicates were higher in low-tide whereas pH, salinity, and dissolved oxygen were higher in high-tide water samples. The results of high BOD and low DO expose the anthropogenic inputs in these estuaries during the low-tide. The results of physico-chemical and nutrients parameters of water showed that the pollution level is strongly influenced by tidal and seasonal changes. Pearson’s correlation matrix and principal component analysis (PCA) are applied to a hydrological and hydrographical dataset for finding the spatial-temporal variation during the tidal difference. This study suggested that there is an impact of industrial pollution and anthropogenic inputs on the estuarine water of the study area.
    Źródło:
    World Scientific News; 2020, 143; 79-102
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Study of Changes in Genetic Diversities and Hepatic Histological Structures of Two Ichthyofauna as a Consequence of Water Pollution in Two Different Areas of West Bengal
    Autorzy:
    Lahiri, Annesha
    Das, Sohini
    Datta, Rahul Kumar
    Powiązania:
    https://bibliotekanauki.pl/articles/1193627.pdf
    Data publikacji:
    2017
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    DNA gel electrophoresis
    Labeo bata
    Labeo rohita
    Water pollution
    fish liver
    histopathology
    ichthyofauna
    physicochemical parameters
    Opis:
    Water pollution affects biodiversity harshly. An attempt was made to find out the effect of aquatic pollution on the tissues of the fish, taking two different types of carps from two different areas of West Bengal (Barrackpore in North 24 Parganas and Raiganj in North Dinajpur). The carps used were Labeo rohita (major carp) and Labeo bata (minor carp) and were sampled from two different ponds within 1 km of each locality. The physicochemical parameters of the respective ponds were estimated from which the fishes were collected and comparisons were made. Liver tissues were taken from the fishes for histological and molecular analysis. From histological studies, it was found that there were some irregularities in the liver tissue structures which might be due to water pollution. DNA isolation from fish liver followed by gel electrophoresis was done to check whether water pollution affect the integrity of the extracted genomic DNA of the fish samples.
    Źródło:
    World Scientific News; 2017, 71; 132-138
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-5 z 5

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