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    Wyświetlanie 1-2 z 2
    Tytuł:
    Removal of chromium(VI) from wastewater through ion exchange. Kinetic and scale up studies
    Autorzy:
    Ahmad, Syed Waqas
    Zafar, Muhammad Shahzad
    Ahmad, Sajjad
    Zia-Ul-Haq, M.
    Ashraf, Muhammad
    Rabbani, Javed
    Ullah, Sami
    Powiązania:
    https://bibliotekanauki.pl/articles/208034.pdf
    Data publikacji:
    2019
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    ion exchange
    industrial wastewater
    anion resin
    heavy metals
    cadmium
    wymiana jonowa
    ścieki przemysłowe
    żywica anionowa
    metale ciężkie
    kadm
    Opis:
    Chromium(VI) ions were removed from industrial wastewater. In this regard, a rig was fabricated carrying alkaline anion resin. Various experiments were carried out by varying pH, temperature and volumetric flow rate of solution by employing a rig to study the kinetics of the ion exchange process. The rate constant (k) and maximum solid phase concentration of exchanged solute (q0) were calculated using the Thomson equation to scale up the purification process of industrial runoff of chromium(VI) from the tanning, photography and ceramic industry. Experimental optimization revealed that developed setup will remove chromium(VI) to a level of 5 mg/dm3 from 300 mg/dm3 in 40 000 dm3 of wastewater. To achieve the best results for the flow rate of 10 000 3 3/day, 12.03 kg of anionic resin were recommended by fixing the pH of the setup at 7.4 while maintaining the treatment temperature at 20 °C.
    Źródło:
    Environment Protection Engineering; 2019, 45, 1; 17-29
    0324-8828
    Pojawia się w:
    Environment Protection Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The effect of militancy on education and its socio-economic consequencies
    Autorzy:
    Nawab, Sher
    Ullah, Sami
    Farooq, Usman
    Malik, Muhammad Shafi
    Ghafoor, Irshad
    Powiązania:
    https://bibliotekanauki.pl/articles/1878521.pdf
    Data publikacji:
    2021-09-25
    Wydawca:
    Fundacja Pro Scientia Publica
    Tematy:
    Terrorism, School Drop Out, Education, Militancy, FATA
    Opis:
    Background: The study was conducted in 2017 to know about the effects of militancy on education in the form of dropout from schools, destroyed infrastructure of educational institutions, decrease in literacy rate and to probe out the community perception about education in the context of adverse law and order situation in district Mohmand Agency. The study was significant because Mohmand Agency is the worst terrorist affected area. Objectives: The objectives of the study were examining the factors causing militancy, and to determine the effects of militancy on education in Mohmand Agency. Methodology: For this purpose, 250 sample respondents out of the total population from four selected villages viz Gurbaz, Masood, Sultan Khel and Baro Khel from tehsil Safi and Halimzai were selected. The respondents were randomly interviewed through an interview schedule. Chi-square test was used as statistical instrument to determine the association between education and different factors that cause terrorism. Results: It was found that majority of the respondents were agreed that unemployment, poverty, drone attacks, unidentified Pak-Afghan border were the main factors that caused militancy in the area and had greatly affected the primary and secondary education in the area. Respondents were of the view that brutal activities against Muslims across the globe and presence of NATO forces in the region increased terrorism. Involvement of foreign intelligence agencies in our county and weak national security network to handle terrorist activities properly were the main causes of terrorism. Parents remain worried about their children’s education due to security threats and insufficient schools remaining in the area. Conclusion: It was concluded that due to insecurity, lack of infrastructure and insufficient schools; education in the area under study was greatly affected. The study suggested that bringing of peace and reasonable security measures against militants can rebuild the educational environment in the study area.
    Źródło:
    Journal of Education Culture and Society; 2021, 12, 2; 613-630
    2081-1640
    Pojawia się w:
    Journal of Education Culture and Society
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-2 z 2

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