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Defluoridation from Aqueous Solutions Using Activated Cow Bone |
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| รหัสดีโอไอ | |
| Creator | 1. Yanasinee Suma 2. Numfon Eaktasang 3. Pradabduang Kiattisaksiri |
| Title | Defluoridation from Aqueous Solutions Using Activated Cow Bone |
| Publisher | Thai Society of Higher Education Institutes on Environment |
| Publication Year | 2567 |
| Journal Title | EnvironmentAsia |
| Journal Vol. | 17 |
| Journal No. | 2 |
| Page no. | 127-144 |
| Keyword | Activated carbon, Adsorption, Cow bone, Defluoridation, Fluoride |
| URL Website | http://www.tshe.org/ea/index.html |
| Website title | EnvironmentAsia |
| ISSN | 1906-1714 |
| Abstract | The objective of this study was to synthesize activated carbon from cow bones (ACB). The investigation focused on identifying the optimal synthesis conditions for ACB and subsequently evaluating its efficacy in adsorbing fluoride in synthetic and natural groundwater samples. The findings revealed that pyrolyzing cow bones at 600 0C for 1 h exhibited superior fluoride adsorption capabilities (6 mg/L) in synthetic water compared to pyrolysis at 400 and 500 0C, attributed to the largest surface area (144.20 m?/g). The highest observed fluoride adsorption efficiency reached 85.87 ? 2.78% within 15 min. The optimal dosage and particle size of the ACB were determined to be 0.5 g and within the range of 30 - 50 mesh, respectively. Additionally, the study demonstrated that fluoride adsorption efficiency was notably enhanced at pH 5 compared to pH 7 and 9, exhibiting an upward trend with increasing fluoride concentration. The maximum adsorption capacity of the ACB was 0.52 mg/g. The adsorption isotherms of fluoride matched well with the Langmuir isotherm model (R2 = 1.000) and the pseudo-second-order kinetic (R2 = 0.9969). In evaluations conducted with natural groundwater, the ACB achieved a successful adsorption rate of approximately 74.95 ? 7.38% for an initial fluoride concentration of approximately 6 mg/L within 15 min. Consequently, the utilization of activated carbon derived from cow bones presents a viable approach for fluoride removal in natural water sources. |
