TY - JOUR
T1 - Kinetic study on phosphate removal from aqueous solution by biochar derived from peanut shell as renewable adsorptive media
AU - Jung, K. W.
AU - Hwang, M. J.
AU - Ahn, K. H.
AU - Ok, Y. S.
N1 - Funding Information:
This work was supported by grants from the Korea Research Council of Fundamental Science and Technology and the KIST Institutional Program.
Publisher Copyright:
© 2015, Islamic Azad University (IAU).
PY - 2015/10/20
Y1 - 2015/10/20
N2 - As an alternative strategy for phosphate removal, biochar (black carbon) has characteristics superior to those of widely used adsorptive media, from both economic and environmental points of view. In this study, various types of biochar derived from oak wood, bamboo wood, maize residue, soybean stover, and peanut shell were tested for evaluation of phosphate removal. After 24 h of reaction time, the phosphate removal was limited (2.0–9.4 %) in case of general adsorptive media. However, interestingly, among various biochars, peanut shell-derived biochar (PSB) exhibited the best performance, showing the highest phosphate removal rate, 61.3 % (3.8 mg PO4−P g PSB−1). We attribute this high value to the proper structural properties of PSB, such as BET-specific surface area of 348.96 m2 g−1 and mineral/phosphorus ratio (Mg/P = 3.46 and Ca/P = 47.6). Adsorption equilibrium and kinetics of phosphate at different temperature (10, 20, and 30 °C) were well explained in the whole experimental region by Langmuir isotherm and pseudo-second-order kinetic models, respectively. The maximum adsorption capacity of PSB was 6.79 mg g−1 for phosphate at 30 °C. These findings suggest that PSB has great potential as an alternative and renewable adsorptive media for phosphate removal.
AB - As an alternative strategy for phosphate removal, biochar (black carbon) has characteristics superior to those of widely used adsorptive media, from both economic and environmental points of view. In this study, various types of biochar derived from oak wood, bamboo wood, maize residue, soybean stover, and peanut shell were tested for evaluation of phosphate removal. After 24 h of reaction time, the phosphate removal was limited (2.0–9.4 %) in case of general adsorptive media. However, interestingly, among various biochars, peanut shell-derived biochar (PSB) exhibited the best performance, showing the highest phosphate removal rate, 61.3 % (3.8 mg PO4−P g PSB−1). We attribute this high value to the proper structural properties of PSB, such as BET-specific surface area of 348.96 m2 g−1 and mineral/phosphorus ratio (Mg/P = 3.46 and Ca/P = 47.6). Adsorption equilibrium and kinetics of phosphate at different temperature (10, 20, and 30 °C) were well explained in the whole experimental region by Langmuir isotherm and pseudo-second-order kinetic models, respectively. The maximum adsorption capacity of PSB was 6.79 mg g−1 for phosphate at 30 °C. These findings suggest that PSB has great potential as an alternative and renewable adsorptive media for phosphate removal.
KW - Biochar
KW - Black carbon
KW - Charcoal
KW - Mineral/phosphorus ratio
KW - Peanut shells
KW - Phosphate removal
UR - http://www.scopus.com/inward/record.url?scp=84939452753&partnerID=8YFLogxK
U2 - 10.1007/s13762-015-0766-5
DO - 10.1007/s13762-015-0766-5
M3 - Article
AN - SCOPUS:84939452753
SN - 1735-1472
VL - 12
SP - 3363
EP - 3372
JO - International Journal of Environmental Science and Technology
JF - International Journal of Environmental Science and Technology
IS - 10
ER -
