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Access type: UnknownAuthor: search.filters.author.Buzdar, Abdul Rehman

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    Development and surface modification of anion exchange membrane for enhancement of antifouling potential in electrodialys process
    (2018-01-01)
    Khan, Muhammad Imran
    ;
    Zafar, Shagufta
    ;
    Khraisheh, Majeda
    ;
    Khan, Muhammad Ali
    ;
    Buzdar, Abdul Rehman
    The membrane fouling in the course of electrodialysis (ED) is a serious problem during water treatment which results to its shorter lifetime and higher energy consumption. Here, the antifouling property of previously reported BPPO-based anion exchange membranes (AEM) has been improved by surface coating with polydopamine (PDA). The modified and unmodified membranes were characterized in term of Fourier transform infrared (FTIR) spectroscopy, scanning electron microscopy (SEM) water contact angle and water uptake. The antifouling potential was investigated in term of transition time, i.e. the time elapsed before the fouling took place.
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    Adsorption kinetic, equilibrium and thermodynamic study for the removal of Congo Red from aqueous solution
    (2017-12-01)
    Khan, Muhammad Imran
    ;
    Zafar, Shagufta
    ;
    Khan, Muhammad Ali
    ;
    Buzdar, Abdul Rehman
    ;
    Prapamonthon, Prasert
    In this study, the adsorption of Congo red (CR) dye from aqueous solution onto cationic polymeric film (BIII) was investigated at ambient temperature. The effect of operational parameters such as contact time, membrane dosage, initial dye concentration and temperature on the adsorption of CR from aqueous solution was studied. Adsorption kinetics has been studied by employing several kinetic models and attained results showed that the adsorption data fitted-well to the pseudo-second-order kinetic model. Nonlinear forms of two parameters and three parameters isotherms were applied on experimental data and the results indicated that the adsorption data fitted well to the various two and three parameters isotherms. Thermodynamic study showed that the adsorption of CR onto cationic polymeric film (BIII) was an exothermic process.