Sriprom, Pongsert

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Sriprom, Pongsert
Alternative Name
Sriprom, P.
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Email
pongsert.sr@kmitl.ac.th

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    Item type:Publication,
    Catalytic wet-air oxidation of aniline removal from synthetic wastewater
    (2014-01-01)
    Sriprom, Pongsert
    ;
    Assawasaengrat, Pornsawan
    ;
    Neramittagapong, Arthit
    ;
    Neramittagapong, Sutasinee
    Wet-air oxidation (WAO) and catalytic wet-air oxidation (CWAO) over CuO/Al<inf>2</inf>O<inf>3</inf> and NiO/Al<inf>2</inf>O<inf>3</inf> catalysts for aniline removal were investigated. The oxidation reaction was carried out in a 1000-ml high-pressure batch reactor. The temperatures of 160, 200 and 260°C and the pressures of 5 and 10 bars were generally applied for 120 min. CuO/Al<inf>2</inf>O<inf>3</inf> and NiO/Al<inf>2</inf>O<inf>3</inf> catalysts were prepared by impregnation method. It is found from the results that aniline was completely degraded at these conditions. However, aniline was converted into other organic carbons which remained in the solution. So COD was found in the solution after the reaction. It is seen from the results that 56% of COD was removed by WAO at 200°C and 10 bars for 120 min. The CWAO over CuO/Al<inf>2</inf>O<inf>3</inf> catalyst showed higher COD removal (76%) than NiO/Al<inf>2</inf>O<inf>3</inf> catalyst (60%). The types of metal oxide had an effect to the activity of COD removal; that is, CuO showed higher COD removal than NiO. The WAO and CWAO of COD removal in aniline solution were the first-order kinetic with the constant reaction rate and activation energy for CuO/Al<inf>2</inf>O<inf>3</inf> of 0.234 s<sup>-1</sup> and 11.772 kJ/mol, respectively. © (2014) Trans Tech Publications, Switzerland.
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    Item type:Publication,
    Optimizing Decolorization Efficiency of Methylene Blue by Photo-Fenton Process over Fe-Diatomite using Central Composite Design
    (2018-01-01)
    Sriprom, Pongsert
    ;
    Champa, Varocha
    ;
    Kitchaiya, Prakob
    ;
    Assawasaengrat, Pornsawan
    The methylene blue was degraded by photo-fenton over Fe-diatomite prepared by dry impregnation method. The characterizations of catalyst were studied by XRD, XRF and BET surface area. The photo-fenton reaction conditions were studied as parameters of the H<inf>2</inf>O<inf>2</inf> concentration, the amount of Fe-diatomite, the initial concentration of methylene blue and the initial pH of solution, which were designed by central composite design (CCD) based on response surface methodology (RSM) to accomplish the optimal condition. The results showed that the optimum condition was at the initial H<inf>2</inf>O<inf>2</inf> concentration of 116 mg/L, the Fe-diatomite of 1 g/L, the initial MB concentration of 200 mg/L and the pH of 5.8. It could predict the decolorization value of 100% and reduce the total organic carbon (TOC) to 72.3%. Finally, the validation was tested in 5 runs at the optimization about 99.2 ± 0.2% which implied that the regression model is in a good agreement.