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Wyszukujesz frazę "Hassan, Rasha" wg kryterium: Autor

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    Wyświetlanie 1-4 z 4
    Tytuł:
    Impact of cationic-anionic surfactants on selective oil agglomeration of oil shale
    Autorzy:
    Abdel-Khalek, Mohamed A.
    Amin, Rasha
    Hassan, El-Sayed R. E.
    Powiązania:
    https://bibliotekanauki.pl/articles/1450561.pdf
    Data publikacji:
    2020
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    oil shale
    oil agglomeration
    kerogen
    surfactants
    zeta potential
    Opis:
    Egyptian oil shale from Red Sea area is upgraded via oil agglomeration technique to achieve a clean fuel. A representative sample is characterized to identify its undesirable components and its liberation size. The quartz, apatite, calcite, siderite and anhydrite are the main gangue minerals. The sample was pulverized to less than 20 µm for efficient liberation. The impact of anionic (Calcium dodecyl benzene sulfonate, CDBS) or/and cationic (Cetrimonium bromide, CTAB) surfactants on the zeta-potential and agglomeration process was investigated in presence of different kerosene concentrations. A concentrate of 62% kerogen with 95% recovery was obtained from feed of 29% kerogen using 0.1% CTAB/CDBS mixture in 2% kerosene emulsion.
    Źródło:
    Physicochemical Problems of Mineral Processing; 2020, 56, 6; 137-144
    1643-1049
    2084-4735
    Pojawia się w:
    Physicochemical Problems of Mineral Processing
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A novel application of building demolition waste for removal benzene from aqueous solutions
    Autorzy:
    Alquzweeni, Saif S.,
    Hassan, Afrah A.
    Alkizwini, Rasha S.
    Powiązania:
    https://bibliotekanauki.pl/articles/35515684.pdf
    Data publikacji:
    2021
    Wydawca:
    Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
    Tematy:
    building demolition waste
    benzene
    equilibrium
    FTIR analysis
    Opis:
    A novel application of building demolition waste for removal benzene from aqueous solutions. In this research, demolition waste from buildings has been studied for possible use as benzene removal adsorbent from aquatic solution. The effect of adsorbent dosage, contact time, initial benzene concentration, and initial pH on benzene adsorption capacity have been investigated in the batch adsorption experiments. The adsorption effects initially happened very rapidly and achieved equilibrium within 180 min. Benzene removal was observed to decrease by an increase in the initial concentration of benzene of 300–700 mg·L–1, an increase in the adsorbent dose of 0.4–2.4 g per 100 mL, where an optimum adsorbent dose equal to 1.2 g per 100 mL was found. The potential of adsorption increases with pH 3.0–7.0 to reach the maximum removal efficiency at pH 6.0. The findings showed that equilibrium data were adequately adapted and correlated with the Freundlich isotherm models. The average percentage of the removal at room temperature was about 98%. Results suggest that building demolition waste can be used effectively in industrial wastewater treatment for the removal of aromatic hydrocarbon, benzene, as a low-cost option.
    Źródło:
    Scientific Review Engineering and Environmental Sciences; 2021, 30, 1; 86-97
    1732-9353
    Pojawia się w:
    Scientific Review Engineering and Environmental Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Socio-ecological analysis of artisanal gold mining in West Africa: a case study of Ghana
    Autorzy:
    Takyi, Richard
    Hassan, Rasha
    El Mahrad, Badr
    Adade, Richard
    Powiązania:
    https://bibliotekanauki.pl/articles/2073904.pdf
    Data publikacji:
    2021
    Wydawca:
    Główny Instytut Górnictwa
    Tematy:
    artisanal mining
    environmental assessment
    management
    gold
    Ghana
    górnictwo rzemieślnicze
    ocena środowiskowa
    zarządzanie
    złoto
    Opis:
    The surge in artisanal gold mining (AGM) activities and the associated environmental impact in Ghana have elicited several stakeholders' attempts to curb the problem. However, due to little understanding of the underlying issues, these efforts have been ineffective. This study aims to use a socio-ecological framework to analyze drivers of AGM activities, the environmental pressures, the state change, their impact on human welfare, and the management response as measures (DAPSI(W)R(M)) to the problem. Evaluate AGM's impact on Ghana's ability to achieve the United Nations Sustainable Development Goals (SDGs). Data were collected from relevant literature on the subject and analyzed with the DAPSI(W) R(M) framework. Esteem needs, food, acceptance and friendship, and self-actualization are the main drivers of AGM activities leading to environmental pressures, including abrasion, extraction of living and non-living resources, the introduction of non-synthetic compounds, among others. State changes of the environment resulting from the pressures generated by human activities were changes in the land and forest cover (1.13%), topography (hills turned into flatland and undulating), and biota. Due to the state in the environment, water quality and availability, agriculture food production, fish yield, food safety, spiritual and cultural loss, death, injury, and health of gold miners and other stakeholders have been affected.
    Źródło:
    Journal of Sustainable Mining; 2021, 20, 3; 206--219
    2300-1364
    2300-3960
    Pojawia się w:
    Journal of Sustainable Mining
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Parameter estimation of exponentiated exponential distribution under selective ranked set sampling
    Autorzy:
    Hassan, Amal S.
    Elshaarawy, Rasha S.
    Nagy, Heba F.
    Powiązania:
    https://bibliotekanauki.pl/articles/2156898.pdf
    Data publikacji:
    2022-12-15
    Wydawca:
    Główny Urząd Statystyczny
    Tematy:
    exponentiated exponential distribution
    partial ranked set sampling
    neoteric ranked set sampling
    maximum likelihood method
    Opis:
    Partial ranked set sampling (PRSS) is a cost-effective sampling method. It is a combination of simple random sample (SRS) and ranked set sampling (RSS) designs. The PRSS method allows flexibility for the experimenter in selecting the sample when it is either difficult to rank the units within each set with full confidence or when experimental units are not available. In this article, we introduce and define the likelihood function of any probability distribution under the PRSS scheme. The performance of the maximum likelihood estimators is examined when the available data are assumed to have an exponentiated exponential (EE) distribution via some selective RSS schemes as well as SRS. The suggested ranked schemes include the PRSS, RSS, neoteric RSS (NRSS), and extreme RSS (ERSS). An intensive simulation study was conducted to compare and explore the behaviour of the proposed estimators. The study demonstrated that the maximum likelihood estimators via PRSS, NRSS, ERSS, and RSS schemes are more efficient than the corresponding estimators under SRS. A real data set is presented for illustrative purposes.
    Źródło:
    Statistics in Transition new series; 2022, 23, 4; 37-58
    1234-7655
    Pojawia się w:
    Statistics in Transition new series
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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