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http://dx.doi.org/10.11001/jksww.2020.34.1.001

Effects of pyrolysis temperature of the waste cattle bone char on the fluoride adsorption characteristics  

Kim, Junyoung (Department of Environmental Engineering, Chungnam National University)
Hwang, Jiyeon (Department of Environmental Engineering, Chungnam National University)
Choi, Younggyun (Department of Environmental Engineering, Chungnam National University)
Shin, Gwyam (Department of Environmental and Safety Engineering, Ajou University)
Publication Information
Journal of Korean Society of Water and Wastewater / v.34, no.1, 2020 , pp. 1-8 More about this Journal
Abstract
In this study, the physicochemical characteristics and fluoride adsorption capacity of the bone char pyrolyzed at different temperatures; 200℃, 300℃, 350℃, 400℃, 500℃, 600℃, and 700℃ were investigated. Analytical studies of the synthesized bone char including; SEM-EDS, XRD, BET and FT-IR, showed the presence of hydroxyapatite(HAP), which is the main substance that adsorbs fluoride from aqueous solutions containing high fluoride concentrations. Bone char pyrolyzed from 350~700℃ specifically revealed that, the lower the temperature, the higher the fluoride adsorption capacity and vice versa. The loss of the fluoride adsorption function of HAP (OH- band in the FTIR analysis) was interpreted as the main reason behind this inverse correlation between temperature and fluoride adsorption. Bone char produced at 350℃ hence exhibited a fluoride adsorption capacity of 10.56 mgF/g, resulting in significantly higher adsorption compared to previous studies.
Keywords
Bone char; Hydroxyapatite; Fluoride; Adsorption; Calcination;
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