TY - JOUR
T1 - An efficient phosphorus scavenging from aqueous solution using magnesiothermally modified bio-calcite
AU - Ahmad, Munir
AU - Ahmad, Mahtab
AU - Usman, Adel R.A.
AU - Al-Faraj, Abdullah S.
AU - Ok, Yong Sik
AU - Hussain, Qaiser
AU - Abduljabbar, Adel S.
AU - Al-Wabel, Mohammad I.
N1 - Funding Information:
The authors extend their appreciation to the Deanship of Scientific Research at King Saud University, Riyadh, Saudi Arabia, for funding this work through the international research group project no [IRG-14-02].
Publisher Copyright:
© 2017 Informa UK Limited, trading as Taylor & Francis Group.
PY - 2018/7/3
Y1 - 2018/7/3
N2 - Bio-calcite (BC) derived from waste hen eggshell was subjected to thermal treatments (calcined bio-calcite (CBC)). The BC and CBC were further modified via magnesiothermal treatments to produce modified bio-calcite (MBC) and modified calcined bio-calcite (MCBC), respectively, and evaluated as a novel green sorbent for P removal from aqueous solutions in the batch experiments. Modified BC exhibited improved structural and chemical properties, such as porosity, surface area, thermal stability, mineralogy and functional groups, than pristine material. Langmuir and Freundlich models well described the P sorption onto both thermally and magnesiothermally sorbents, respectively, suggesting mono- and multi-layer sorption. Langmuir predicted highest P sorption capacities were in the order of: MCBC (43.33 mg g−1) > MBC (35.63 mg g−1) > CBC (34.38 mg g−1) > BC (30.68 mg g−1). The MBC and MCBC removed 100% P up to 50 mg P L−1, which reduced to 35.43 and 39.96%, respectively, when P concentration was increased up to 1000 mg L−1. Dynamics of P sorption was well explained by the pseudo-second-order rate equation, with the highest sorption rate of 4.32 mg g−1 min−1 for the MCBC. Hydroxylapatite [Ca10(PO4)6(OH)2] and brushite [CaH(PO4)·2H2O] were detected after P sorption onto the modified sorbents by X-ray diffraction analysis, suggesting chemisorption as the operating sorption mechanism.
AB - Bio-calcite (BC) derived from waste hen eggshell was subjected to thermal treatments (calcined bio-calcite (CBC)). The BC and CBC were further modified via magnesiothermal treatments to produce modified bio-calcite (MBC) and modified calcined bio-calcite (MCBC), respectively, and evaluated as a novel green sorbent for P removal from aqueous solutions in the batch experiments. Modified BC exhibited improved structural and chemical properties, such as porosity, surface area, thermal stability, mineralogy and functional groups, than pristine material. Langmuir and Freundlich models well described the P sorption onto both thermally and magnesiothermally sorbents, respectively, suggesting mono- and multi-layer sorption. Langmuir predicted highest P sorption capacities were in the order of: MCBC (43.33 mg g−1) > MBC (35.63 mg g−1) > CBC (34.38 mg g−1) > BC (30.68 mg g−1). The MBC and MCBC removed 100% P up to 50 mg P L−1, which reduced to 35.43 and 39.96%, respectively, when P concentration was increased up to 1000 mg L−1. Dynamics of P sorption was well explained by the pseudo-second-order rate equation, with the highest sorption rate of 4.32 mg g−1 min−1 for the MCBC. Hydroxylapatite [Ca10(PO4)6(OH)2] and brushite [CaH(PO4)·2H2O] were detected after P sorption onto the modified sorbents by X-ray diffraction analysis, suggesting chemisorption as the operating sorption mechanism.
KW - Green sorbent
KW - chemisorption
KW - food waste
KW - magnesiothermal reduction
KW - phosphorus recovery
UR - http://www.scopus.com/inward/record.url?scp=85020644303&partnerID=8YFLogxK
U2 - 10.1080/09593330.2017.1335349
DO - 10.1080/09593330.2017.1335349
M3 - Article
C2 - 28545323
AN - SCOPUS:85020644303
SN - 0959-3330
VL - 39
SP - 1638
EP - 1649
JO - Environmental Technology (United Kingdom)
JF - Environmental Technology (United Kingdom)
IS - 13
ER -