Assawasaengrat, Pornsawan
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Preferred name
Assawasaengrat, Pornsawan
Alternative Name
Assawasaengrat, P.
Main Affiliation
Email
pornsawan.as@kmitl.ac.th
37 results
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Item type:Publication, Comparative physicochemical and rheological properties of tamarind seed xyloglucan from sweet and sour tamarind cultivars for food applications(2026-06-01); - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Solid shrimp waste derived nanoporous carbon as an alternative bio-sorbent for oxytetracycline removal from aquaculture wastewater(2024-06-15); Manatura, KanitRecently, it has been critical to effectively remove oxytetracycline (OTC) from aquaculture wastewater before releasing into the environment. The adsorption process is recognized as an efficient pathway for removing OTC since it is a simple, stable, and cost-effective method. This study aims to develop nanoporous carbon entirely from shrimp waste (SW) via hydrothermal carbonization assisted with KOH activation. Existing KOH significantly increases the porosity of SW nanoporous carbon. The optimal SW porous carbon was obtained using 5 wt%KOH for activation, which had the largest surface area of 679.51 m<sup>2</sup>/g with the total pore volume of 0.458 cm<sup>3</sup>/g. Moreover, the SW porous carbon with the highest porosity was selected for the OTC adsorption. The Langmuir isotherm model and the pseudo-second-order kinetic model match the experimental data, implying that the adsorption mechanism is mono-layered adsorption due to micropores by chemisorption interaction. The adsorption capacity significantly improved by increasing the dosage of SW nanoporous carbon. The SW nanoporous carbon adsorption for OTC is primarily regulated by pore filling affected by hydrogen bonding, and π-π* interaction also plays a significant role. The SW nanoporous carbon showed an efficient OTC adsorption after 5 regeneration cycles. This work demonstrates biomass waste recycling and emphasizes the potential of aquatic food processing waste-derived nanoporous carbon for antibiotic adsorption. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Dimethyl ether synthesis from methanol over diatomite catalyst modified using nitric acid treatment(2016-08-02); Neramittagapong, ArthitDimethyl ether synthesis from methanol over diatomite catalysts modified using nitric acid was investigated. The catalytic performance of diatomite was tested in a fixed-bed reactor under atmospheric pressure and within the temperature range of 250–350°C. It was discovered that high acidity of the catalyst yielded a higher methanol conversion rate. Moreover, it was revealed that the acidity of the catalyst surface was controlled by Al<sup>(IV)</sup> ions whereas basicity of the catalyst surface was determined by Al<sup>(V)</sup> and Al<sup>(VI)</sup> ions. From this finding, the authors were able to propose the mechanism of DME synthesis from methanol over treated diatomite. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Sustainable Utilization of Chicken Eggshell Waste for Adsorptive Removal of Congo Red Dye from Wastewater(2026-01-01) - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Study on chemical structure stability and properties of chitosan-incorporated tamarind seed kernel xyloglucan hydrogels(2024-12-05); - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Oil palm leaf-derived nanoporous carbon via hydrothermal carbonization combined with NaOH microwave activation for tetracycline adsorption(2025-11-01); Generally, the increase in pharmaceutical industrial activities has led to a corresponding rise in water resource contamination. Efforts have been dedicated to addressing the urgent challenge of waste biomass disposal by developing recycling methods capable of producing bio-adsorbents. Adsorption is a promising approach for removing tetracycline contaminants, owing to its simplicity, stability, and cost-effectiveness. In this study, a low-cost activated biochar was successfully developed using oil palm leaf (OPL) via hydrothermal carbonization (HTC) combined microwave-assisted pyrolysis system (MAPS) using sodium hydroxide (NaOH). The HTC and MAPS processes enhanced high mass yield, porosity, energy efficiency, and reduced reaction time. NaOH treatment improved the porosity of the activated biochar derived from OPL, resulting primarily in a mesoporous structure. However, NaOH treatment via the MAPS process increased surface area and porosity. Among the samples tested, OPLC-NaOH-1:1 exhibited the largest surface area and highest porosity, making it the chosen candidate for further TC adsorption tests. The adsorption experiments revealed that the Langmuir isotherm model and the pseudo-second-order kinetic model accurately matched the experimental data, suggesting a mono-layered adsorption mechanism due to micropores and chemisorption interactions. Additionally, thermodynamic analysis indicated an endothermic and spontaneous reaction during the adsorption process. The adsorption of nanoporous carbon for TC was primarily regulated by pore filling, hydrogen bonding, electrostatic effects, and π-π interactions also playing a significant role. Overall, this study highlights the potential of utilizing OPL waste as a sustainable material for producing nanoporous carbon and underscores the effectiveness of nanoporous carbon for adsorbing antibiotics. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Optimization of betalain extraction from dragon fruit (Hylocereus undatus) peel and effect of pH on its properties(2025-02-01); - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Assessment of overall remaining useful life of lubricants by integrating oil quality and performance(2024-09-30); - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Methanol production from CO2 reduction over Ni/TiO2 catalyst(2020-12-01); Neramittagapong, ArthitPhotocatalytic reduction of carbon dioxide into methanol fuel over the Ni-doped TiO<inf>2</inf> catalyst has been investigated. The experiments were carried out in a 50 ml batch reactor under UV irradiation. Ni/TiO<inf>2</inf> photocatalysts were prepared by an impregnation method. The properties of the catalyst were characterized by X-ray photoelectron spectroscopy (XPS), UV–Vis diffuse reflectance (UV–DR). Moreover, the effect of reaction time and Ni loading on the methanol conversion were investigated. The result indicated that the maximum of methanol production was obtained after the irradiation of 3 h and slightly reduced due to the methanol oxidation process. The Ni loading catalyst showed the higher methanol concentration than that over undoped TiO<inf>2</inf> because Ni could trap the electron during irradiation and reduce electron–hole pair recombination by the p–n junction of TiO<inf>2</inf>. The highest methanol production rate of 272.45μmol/g<inf>cat</inf> was obtained over 4% wt Ni/TiO<inf>2</inf> catalyst, which was 20 times higher methanol production rate than that over the commercial TiO<inf>2</inf> catalyst (P25). Moreover, the stability of catalysts could be recycled four times with high activity of CO<inf>2</inf> reduction to methanol. Therefore, 4% wt. Ni/TiO<inf>2</inf> catalyst, low cost, showed better potential and activity in reducing CO<inf>2</inf> emission to the environment. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Dimethyl ether synthesis via methanol dehydration over diatomite catalyst modified using hydrochloric acid(2014-01-01);