Chaiyaraksa, Chompoonut
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Preferred name
Chaiyaraksa, Chompoonut
Alternative Name
Chaiyaraksa, C.
Main Affiliation
Email
chompoonut.ch@kmitl.ac.th
15 results
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Item type:Publication, Peroxydisulfate Co-Treatment with MnOx-Loaded Biochar for COD Removal from Automobile Service Station Wastewater(2023-01-01); - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Mobility retardation of Cd, Pb and Mn in acid soil using phosphate fertilizers(2019-05-01); Rodsa, NatthananContamination of heavy metals in soil is a major problem that causes damage to the environments. The aim of this research was to observe the efficiency of phosphate fertilizer, including phosphate rock, di-ammonium phosphate, and monopotassium phosphate in stabilizing lead, cadmium, and manganese in contaminated soil. The sampling soil was an acid sandy clay loam soil from Rayong Province which is one of the most industrialized provinces in Thailand. After applying fertilizers to the soil, the determination was on soil pH, the total concentration of heavy metals, heavy metal forms in soil and potential of heavy metals to enter the biological system. The results showed that phosphate rock, diammonium phosphate, and monopotassium phosphate increased the soil pH from 3.60 to 6.5, 7.0 and 5.2, respectively. Phosphate fertilizers could change an unstable form to a more stable form of heavy metals. Phosphate rock (7.5 g/kg<inf>soil</inf>) has the highest potential for reducing the mobility of all three metals (about 80% for manganese, 60% for cadmium, and 50% for lead), followed by monopotassium phosphate. The results obtained from the extraction with DTPA and CaCl<inf>2</inf> were closely related to the results obtained from the sequential extraction method. Phosphate rock was the best to reduce potentially toxic metals phytoavailability. Soil improvement with phosphate fertilizer was considered a good alternative for stabilizing soils contaminated with cadmium, lead, and manganese. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Adsorption of direct red 83 using cetyltrimethylammonium bromide modified water hyacinth(2018-01-01); 1 - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Reduction of heavy metal movement in soil contaminated with diesel using Corncob-Biochar(2021-01-01); Phumcharoen, KetklaoThis research aimed to study the effect of biochar on the stability of Mn, Cd, and Pb in soil contaminated with diesel. The clay with pH 6.80, medium in organic matter (OM), high in cation exchange capacity (CEC), low in phosphate and salinity was from Bang Rong Subdistrict, Klong Khuen District, Chachoengsao Province (N13˚50’32.1252” E101˚ 9’5.6808”). The metal content is in the standard for use in agriculture. The soil sample was prepared to contain Mn, Pb, and Cd at 2,000 mg/kg, 550 mg/kg, and 50 mg/kg, respectively. The biochar from corncob was neutral, low in CEC, high in conductivity and OM. The surface area, pore-volume, pore radius, acid neutralization capability, and the pH at the point of zero charges (pHPZC) were 61.189 sq. m/g, 0.088 mL/g, 13.664 Angstrom, 1,000 meq/kg, and 6.80, respectively. Five percent of biochar was mixed to the soil containing 2% and 5% of diesel at room temperature for 2, 4, and 8 weeks before extraction with diethylenetriaminepentaacetic acid (DTPA) and sequential extraction. The results indicated that the higher the amount of diesel in soil, the slower the metal movement. Biochar could retard the mobility of Mn, Pb, and Cd in the soil sample. Five percent of biochar was not enough to decrease the metal mobility in soil contaminated with diesel 5%. The amount of extracted heavy metals increased with the more extended mixing period. The addition of biochar to the soil sample could change metals from unstable to stable forms.1 - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Adsorption of cationic and anionic dye using modified pineapple peel(2019-01-01); 1 - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Cleaner Bio-Based Plasticizer Synthesis from Waste Cooking Oil to Substitute Toxic Dioctyl Phthalate in PVC film(2025-01-01); ; 1 - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Adsorption of copper (II) and nickel (II) by chemical modified magnetic biochar derived from eichhornia crassipes(2019-05-01); 1 - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Effect of Chemical Fertilizers on the Efficiency of Biochar in Reducing Lead Mobility in Soil(2024-04-01); Chaiyasit, KanokwanThe objective of this research was to investigate the impact of ten different fertilizers on the mobility of lead in soils that had been treated with biochar. The soil used in this study was collected from Chanthaburi Province. To simulate the experimental conditions, this soil was artificially enriched with 550 mg/kg of lead. The synthetic soil was prepared by mixing it with 10% biochar and 0.04% of various chemical fertilizers. To assess the bioavailability of lead in the soil to plants, an extraction process using diethylenetriamine pentaacetate was performed. This allowed researchers to determine how these fertilizers affected the movement and availability of lead in the soil for plant uptake. In the study, it was observed that among the fertilizers tested, urea was the only one that increased the bioavailability of lead in the soil, making it more accessible to plants. Sequential extraction techniques were employed to analyze six different forms of lead in the soil. Interestingly, all fertilizers, except for urea, caused a transformation of lead from less stable forms to more stable forms in the soil. To further investigate the relationship between fertilizer variables and heavy metal uptake, a stepwise linear regression analysis was applied. The results indicated that the mobility of lead in the soil was primarily influenced by the nitrogen content, potassium levels, and sulfate ion concentration in the fertilizers.1 - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Induction heating pyrolysis of landfilled plastic waste into valuable hydrocarbon fuels(2025-03-01); 1 - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Acid soil amendment by zeolite, sepiolite and diatomite(2019-01-01); Tumtong, MintraThe aim of this research was to reduce the heavy metal movement to the biosystem using clay minerals including zeolite, sepiolite, and diatomite. The clay soil and sandy loam soil were made contaminated with 200, 350, 700, and 250 mg of Zn, Cu, Cr, and Ni per kg of soil, respectively. The ratio of clay minerals added to soils was 2.5%, 5%, and 7.5%. The determination of various forms of heavy metals bound to soil mixed with clay minerals and left for a period of 30 and 60 days was carried out using the sequential extraction method. The results indicated that Ni and Zn were mostly in an exchangeable form, while Cu and Cr were mostly in an oxide bound form and an organically bound form. The pH of the soils increased after adding clay minerals. Diatomite caused the smallest change in the pH value. Chromium had the best adsorption capacity by bonding with various elements in the soil, followed by Cu, Zn, and Ni, respectively. The addition of sepiolite caused more heavy metals in a stable form than adding zeolite and diatomite. When adding clay minerals to both types of soil, the highest impact was on Ni, followed by Zn, Cu, and Cr, respectively. The bioavailable index (BI) value was the least when adding sepiolite. The risk of heavy metals moving to the biosystem was lower when increasing the incubation time. Without adding any clay mineral, the BI value of metals in the sandy clay loam soil was higher than that in the clay soil.1