Journal
SCIENCE OF THE TOTAL ENVIRONMENT
Volume 710, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.scitotenv.2019.136282
Keywords
Biochar; Pyrolysis; Spindina sp.; Tetracycline; Hydrophobic interaction
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Funding
- National Research Foundation of Korea (NRF) - Ministry of Education [NRF-2019R1I1A1A01054638, NRF-2019M3E6A1103979]
- R&D Program for Forest Science Technology by Korea Forest Service (Korea Forestry Promotion Institute) [2019157B10-1921-0101]
- Korea Forestry Promotion Institute (KOFPI) [2019157B10-1921-0101] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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We evaluated the production of Spirulina sp. (microalgae)-derived biochars (SPAL-BCs) at different pyrolysis temperatures for the removal of an emerging water contaminant. tetracycline (TC). Physicochemical properties of SPAL-BCs were characterized and related with their capacity to adsorb TC. Increasing pyrolysis temperatures led to higher aromaticity, higher hydrophobicity, and higher spedfic surface area. In partiallar,SPAL-BC750 possessed the highest hydrophobicity, various strong crystallizations (i.e., calcite, hydroxyapatite, and rhenanite) and functional groups (i.e., CH2, C-N, C-O, and CO32-), which may be associated with high TC adsorption. SPAL-BC750 also presented the highest TC adsorption capacity (132.8 mg TC/g biochar) via batch experimentation because of hydrophobic, pi-pi interactions, functional groups, and metal complexation. The best fitting isotherm and kinetic models of TC adsorption by SPAL-BC750 were the Langmuir and pseudo-first order models, respectively. SPAL-BCs obtained as a by-product of pyrolysis may be an economical and potentially valuable adsorbent for aqueous antibiotic removal. (C) 2019 Elsevier B.V. All rights reserved.
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