Removal of Fluoride from Water Using a Calcium-Modified Dairy Manure-Derived Biochar
This study investigated the removal of fluoride from water using a calcium-modified dairy manure-derived biochar (Ca-DM500). The Ca-DM500 showed a 3.82 - 8.86 times higher removal of fluoride from water than the original (uncoated) manure-derived biochar (DM500). This is primarily attributed to stro...
| Publié dans: | Journal of environmental engineering (New York, N.Y.). - 1994. - 146(2020), 12 vom: 01. Dez., Seite 1-10 |
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| Auteur principal: | |
| Autres auteurs: | , , , |
| Format: | Article en ligne |
| Langue: | English |
| Publié: |
2020
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| Accès à la collection: | Journal of environmental engineering (New York, N.Y.) |
| Sujets: | Journal Article Calcium modified biochar Fluoride Regeneration and reuse Removal kinetics Sorption isotherm |
| Résumé: | This study investigated the removal of fluoride from water using a calcium-modified dairy manure-derived biochar (Ca-DM500). The Ca-DM500 showed a 3.82 - 8.86 times higher removal of fluoride from water than the original (uncoated) manure-derived biochar (DM500). This is primarily attributed to strong precipitation/complexation between fluoride and calcium. The Freundlich and Redlich-Peterson sorption isotherm models better described the experimental data than the Langmuir model. Additionally, the removal kinetics were well described by the intraparticle diffusion model. The Ca-DM500 showed high reactivity per unit surface area [0.0001, 0.03, 0.16 mg F per m2 for Douglas fir-derived biochar (DF-BC), DM500. and Ca-DM500, respectively] for retention of fluoride reflecting the importance of surface complexation. The copresence of anions reduced removal by Ca-DM500 in the order SO 4 2 - ≈ PO 4 3 - > NO 3 - . The sorption behavior of fluoride in a continuous fixed-bed column was consistent with the Thomas model. Column studies demonstrated that the Ca-DM500 shows a strong affinity for fluoride, a low release potential, and a stable (unreduced) removal capacity through regeneration and reuse cycles |
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| Description: | Date Revised 03.12.2021 published: Print Citation Status PubMed-not-MEDLINE |
| ISSN: | 0733-9372 |
| DOI: | 10.1061/(asce)ee.1943-7870.0001812 |