TY - JOUR
T1 - Encapsulation of a powdery spinel-type Li+ ion sieve derived from biogenic manganese oxide in alginate beads
AU - Koilraj, Paulmanickam
AU - Smith, Siwaporn Meejoo
AU - Yu, Qianqian
AU - Ulrich, Sarah
AU - Sasaki, Keiko
N1 - Funding Information:
Financial support was provided to KS by Japan Society for Promotion of Science ( JSPS ) research funding ( 16H02435 , 15F15380 ), to PK by JSPS Postdoctoral Fellowship for Foreign Researchers (P15380). SMS thanks Japan Science and Technology Agency (JST) SAKURA Science Program in Science 2015, and SU to JSPS Summer Program (SP15059) through partnership with National Science Foundation (NSF) in USA. Authors thanks Dr. Satoshi Ohue for his kind support for the preparation of bead samples for TEM analysis.
Publisher Copyright:
© 2016 Elsevier B.V.
PY - 2016/11/1
Y1 - 2016/11/1
N2 - A powdery lithium ion sieve (HMO) derived from biogenic birnessite was homogeneously integrated in sodium alginate (AL) beads. The composite beads were then characterized and their Li+ adsorption properties were investigated. Scanning electron microscopy–energy dispersive spectroscopy analysis showed that the HMO particles were homogeneously dispersed in the AL beads even after drying. The adsorption isotherm of Li+ adsorption to HMO encapsulated in AL beads (HMO–AL) was well fitted by the linear Langmuir model, and the beads showed a maximum adsorption capacity of 3.61 mmol/g based on HMO, which is comparable with the value of the original powdery HMO. Kinetic studies revealed that adsorption of Li+ follows a pseudo-second-order model with rate constant k2 = 2.8–11.9 × 10− 3 g/(mmol min) for the initial Li+ concentration range 2.56–4.23 mM. Diffusion of Li+ from aqueous solution to the HMO particle through the Ca–AL network is the rate-limiting step for Li+ adsorption to HMO–AL beads. The HMO-AL beads enhanced the handling efficiency for Li+ adsorption and reused without significant reduction of Li+ adsorption efficacy.
AB - A powdery lithium ion sieve (HMO) derived from biogenic birnessite was homogeneously integrated in sodium alginate (AL) beads. The composite beads were then characterized and their Li+ adsorption properties were investigated. Scanning electron microscopy–energy dispersive spectroscopy analysis showed that the HMO particles were homogeneously dispersed in the AL beads even after drying. The adsorption isotherm of Li+ adsorption to HMO encapsulated in AL beads (HMO–AL) was well fitted by the linear Langmuir model, and the beads showed a maximum adsorption capacity of 3.61 mmol/g based on HMO, which is comparable with the value of the original powdery HMO. Kinetic studies revealed that adsorption of Li+ follows a pseudo-second-order model with rate constant k2 = 2.8–11.9 × 10− 3 g/(mmol min) for the initial Li+ concentration range 2.56–4.23 mM. Diffusion of Li+ from aqueous solution to the HMO particle through the Ca–AL network is the rate-limiting step for Li+ adsorption to HMO–AL beads. The HMO-AL beads enhanced the handling efficiency for Li+ adsorption and reused without significant reduction of Li+ adsorption efficacy.
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U2 - 10.1016/j.powtec.2016.08.009
DO - 10.1016/j.powtec.2016.08.009
M3 - Article
AN - SCOPUS:84982710144
VL - 301
SP - 1201
EP - 1207
JO - Powder Technology
JF - Powder Technology
SN - 0032-5910
ER -