The photocatalytic activity of immobilized panitio2

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Unformatted text preview: inetics and the optimum loading of PANI was found to be at 0.25 mL. The doping of PANI in the dip -coating formulation was found to improve the rate of degradation of the RR4 dye b y at least 1.3 times under UV illumination. Drastic reduction of the rates constant (k) of RR4 dye degradation were observed when the -1 initial dye concentration exceeded more than 30 mg L while k values decreased linearly with increasing pH of the dye solution. ENV-O20 REMOVAL OF 2-CHLOROPHENOL FROM AQUEOUS SOLUTION BY ADSORPTION USING OIL PALM SHELL ACTIVATED CARBON WITH KOH Bakhtiar K. Hamad, Ahmad Md. Noor and Afidah A. Rahim School of Chemical Science, Universiti Sains Malaysia, 11800 Pulau Pinang, Malaysia E-mail: bakhtiarkh@yahoo.com Activated carbon prepared from the oil palm shell (OPSAC) was investigated for removal of 2 chlorophenol (2CP) in aqueous solution through the adsorption process. The activated carbon was prepared from the oil palm shell raw material soaked in potassium hydroxide (KOH) solution at 1:2 weight ratio followed by the pyrolysis and activation process at 800 °C in N2 and CO2 gas, separately. The effects of solution pH between 2 to 12, agitation time, and initial concentrations in the range of 30 - 225 mg/L of 2CP were evaluated at a temperature of 30 °C. The results showed that the adsorption increased as the contact time increased and the initial concentration decreased, while the high adsorption was obtained in acidic media at pH=2. The high Brunauer-Emmett-Teller (BET) surface area, 2 3 the total volume of pore diameter and the average pore diameter were equal to 1614 m /g, 0.57 cm / g and 2.15 nm, respectively. The functional groups and surface morphology of the prepared activated carbon was determined by using Fourier transform infrared (FTIR) and scanning electron microscopy (SEM) analysis. Langmuir, Freundlich and Temkin isotherm models were used for analyzing the adsorption equilibrium data. Adsorption data of 2CP fr om the activated carbon were fitted better with Langmuir iso...
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