Assawasaengrat, Pornsawan

Loading...
Thumbnail Image
Preferred name
Assawasaengrat, Pornsawan
Alternative Name
Assawasaengrat, P.
Main Affiliation
Email
pornsawan.as@kmitl.ac.th

Settings

Now showing 1 - 5 of 5
  • Loading...
    Thumbnail Image
    Some of the metrics are blocked by your 
    consent settings
    Item type:Publication,
    Sustainable Utilization of Chicken Eggshell Waste for Adsorptive Removal of Congo Red Dye from Wastewater
    (2026-01-01)
    Leelahakarnjana, Kanyakorn
    ;
    Triyaprasertporn, Rawisara
    ;
    Clowutimon, Weerawat
    ;
    Assawasaengrat, Pornsawan
    This study investigates the adsorptive removal of Congo red dye from wastewater using raw chicken eggshell, CaO derived from calcined eggshell, and commercial CaO as adsorbents. Batch adsorption experiments were conducted to determine equilibrium time and analyze adsorption isotherms. Characterization of the materials using XRD, XRF, FT-IR, FT-Raman, and BET confirmed that the calcination process effectively transforms CaCO<inf>3</inf> in the raw eggshell into CaO, significantly increasing surface area and pore volume. These improvements enhance the material’s adsorption performance. The adsorption of Congo red reached equilibrium within 90 min for all adsorbents. Among the tested materials, CaO from eggshell exhibited adsorption capacity comparable to that of commercial CaO, while raw eggshell showed lower performance due to limited surface properties and basicity. Adsorption isotherm data for all adsorbents were better fitted with the Langmuir model, indicating a monolayer physical adsorption process. Overall, the results demonstrate that chicken eggshell waste, when thermally treated, is a promising and sustainable adsorbent for dye removal from wastewater.
  • Loading...
    Thumbnail Image
    Some of the metrics are blocked by your 
    consent settings
    Item type:Publication,
    Preparation of Activated Carbon from Juvenile Durian Fruit by Activating KMnO4 for Methylene Blue Adsorption
    (2026-01-01)
    Assawasaengrat, Pornsawan
    ;
    Chokelarb, Wasan
    ;
    Narkrugsa, Woatthichai
    ;
    Sriprom, Pongsert
    Preparation of activated carbon from juvenile durian fruit by activation with KMnO4 for methylene blue adsorption was studied. The juvenile durian fruit was pyrolyzed at temperatures of 400, 450, 500, 550, and 600 °C and activated with KMnO4. The results demonstrated that the carbonization at 600 °C yielded the highest iodine number of 298.30 mgiodine/gbiochar. Subsequently, the methylene blue adsorption was investigated using a Box-Behnken designed batch experiment. The experimental design included three variables at three levels: adsorbent dosage (g), initial methylene blue concentration (mg/L), and adsorption time (min). The optimum conditions for methylene blue adsorption efficiency reached approximately 99.9% at an adsorbent dosage of 0.55 g, an initial methylene blue concentration of 10 mg/L, and an adsorption time of 90 min.
  • Loading...
    Thumbnail Image
    Some of the metrics are blocked by your 
    consent settings
    Item type:Publication,
    Characterization and Self-Cleaning Properties of Silk Fabric Coated by Chitosan-Xyloglucan/nano-TiO2 Composite Film
    (2024-01-01)
    Lampang, Chaiyawat Na
    ;
    Sriprom, Pongsert
    ;
    Manamoongmongkol, Kanjana
    ;
    Assawasaengrat, Pornsawan
    ;
    Narkrugsa, Woatthichai
    In this study, Chitosan-Xyloglucan encapsulated Titanium dioxide was prepared by in-situ method for coating Silk fabric. FT-IR XRD characterized the functional groups and formation of crystallization of composite film. SEM analysis showed the immobilization of composite film on the surface of silk fabric. The coated silk fabrics were stained with methylene blue, and the stain removal efficiency was evaluated. The results showed that the composite film was deposited onto the silk fabric. The functional groups showed peaks around 1635 to 1636 and 400 to 500 cm-1 that indicate the presence of C=N groups of Chitosan-Xyloglucan and Ti-O groups of TiO<inf>2</inf> on the composite, respectively. The XRD results indicated that the TiO<inf>2</inf> prepared by the sol-gel method was an anatase crystalline structure. The mechanical properties showed the composite film was superior to the Chitosan-Xyloglucan, TiO<inf>2</inf>, and uncoated silk fabric. Finally, the methylene blue degradation capability was investigated. The coated silk fabric has insignificantly removing methylene blue stain than the untreated silk fabric, but it is noticeably repellent to stain.
  • Loading...
    Thumbnail Image
    Some of the metrics are blocked by your 
    consent settings
    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.
  • Loading...
    Thumbnail Image
    Some of the metrics are blocked by your 
    consent settings
    Item type:Publication,
    Synthesis of Epoxidized Waste Cooking Oil as Plasticizer in the Production of Xyloglucan-Chitosan Films
    (2025-01-01)
    Assawasaengrat, Pornsawan
    ;
    Kikaew, Kuntida
    ;
    Wanliphakha, Warintorn
    ;
    Orachorn, Wimolpan
    ;
    Chokelarb, Wasan
    The synthesis of epoxidized waste cooking oil (EWCO) from used oil and the potential of using EWCO as a plasticizer to replace glycerol in xyloglucan-chitosan film were studied. The epoxidation reaction generated an epoxy group, which was induced to break off and form OH groups, potentially used as EWCO plasticizers (EWCOP). The determination of EWCOP by analyzing the chemical structure using FT-IR, where peaks were observed at 3496 cm<sup>-1</sup> and 827 cm<sup>-1</sup>, indicating the opening of the epoxy group. According to the physical properties test, EWCOP has a total acid number of 9.91 mg KOH/g, a flash point below 50 °C, and a viscosity of 0.79 cST at 40 °C. A xyloglucan-chitosan film was prepared using a concentration ratio of xyloglucan to chitosan of 4:1, mixed with a solution of glycerol and EWCOP as the plasticizer at ratios of 7:0, 5:2, 3:4, and 0:7, representing 35% of the total weight of solids. The tensile strength of the xyloglucan-chitosan film increases with a decrease in the glycerol : EWCOP ratio, offering hope for the potential of EWCOP in future applications. Conversely, an increase in the glycerol: EWCOP ratio reduces the elongation of the xyloglucan-chitosan film. The water vapor transfer rate and T<inf>g</inf> in the xyloglucan-chitosan film are lowest when the glycerol: EWCOP ratio is 3:4 and 0:7, respectively. The results showed that using EWCOP as plasticizers to replace glycerol significantly enhanced many aspects of synthesized xyloglucan-chitosan film properties, demonstrating the potential of this research to make a substantial impact in the field.