Mechanism of simultaneous removal of aluminum and fluoride from aqueous solution by La/Mg/Si-activated carbon

Minhee Kim; Choe Earn Choong; Seunghun Hyun; Chang Min Park; Gooyong Lee

doi:10.1016/j.chemosphere.2020.126580

Mechanism of simultaneous removal of aluminum and fluoride from aqueous solution by La/Mg/Si-activated carbon

Minhee Kim, Choe Earn Choong, Seunghun Hyun, Chang Min Park, Gooyong Lee

Research output: Contribution to journal › Article › peer-review

51 Citations (Scopus)

Abstract

La/Mg/Si-activated carbon derived from palm shell has been a suitable material for removal of aluminum and fluoride from aqueous solution. In the study, the mechanism of simultaneous removal of aluminum and fluoride by La/Mg/Si-activated carbon (La/Mg/Si-AC) was investigated to understand its high efficiency. It was found that the removal of aluminum and fluoride by La/Mg/Si-AC was favored at lower pH compared to the point of zero charge of La/Mg/Si-AC and high temperature. Adsorption capacity of Al(OH)₄^- was about 10 times higher than that of F^- due to the strong binding affinity of Al(OH)₄^- on protonated surface and competition between F^- and OH^- toward charged adsorption site. Kinetics results showed that the aluminum and fluoride adsorption were explained using the pseudo-second-order kinetic model and intra-particle diffusion model. Adsorption process of Al(OH)₄^- and F^- was driven by the potential rate-limiting step involved in mass transport process occurred on the boundary diffusion layer of porous adsorbent surface. Electrostatic interaction between protonated surface of La/Mg/Si-AC and negatively charged ions (i.e., Al(OH)₄^- and F^-) as well as ion-exchange between hydroxide and ionic metal species were important mechanisms in the process of aluminum and fluoride adsorption. Driving forces for adsorption of individual Al(OH)₄^- and F^- were not entirely different. Identifying the dominant mechanism will be helpful in understanding the adsorption process and developing new adsorbent. Mechanism of simultaneous removal of aluminum and fluoride by lanthanum/magnesium/silica -activated carbon are predicted.

Original language	English
Article number	126580
Journal	Chemosphere
Volume	253
DOIs	https://doi.org/10.1016/j.chemosphere.2020.126580
Publication status	Published - 2020 Aug

Bibliographical note

Funding Information:
This research was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education ( NRF-2018R1A6A1A03024962 ).

Publisher Copyright:
© 2020

Keywords

Adsorption mechanism
Aluminum
Fluoride
Lanthanum/magnesium/silica-activated carbon

ASJC Scopus subject areas

Environmental Engineering
General Chemistry
Environmental Chemistry
Pollution
Public Health, Environmental and Occupational Health
Health, Toxicology and Mutagenesis

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/j.chemosphere.2020.126580

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@article{50a8da7b0d9e4ce0b6fdcf3836132387,

title = "Mechanism of simultaneous removal of aluminum and fluoride from aqueous solution by La/Mg/Si-activated carbon",

abstract = "La/Mg/Si-activated carbon derived from palm shell has been a suitable material for removal of aluminum and fluoride from aqueous solution. In the study, the mechanism of simultaneous removal of aluminum and fluoride by La/Mg/Si-activated carbon (La/Mg/Si-AC) was investigated to understand its high efficiency. It was found that the removal of aluminum and fluoride by La/Mg/Si-AC was favored at lower pH compared to the point of zero charge of La/Mg/Si-AC and high temperature. Adsorption capacity of Al(OH)4- was about 10 times higher than that of F- due to the strong binding affinity of Al(OH)4- on protonated surface and competition between F- and OH- toward charged adsorption site. Kinetics results showed that the aluminum and fluoride adsorption were explained using the pseudo-second-order kinetic model and intra-particle diffusion model. Adsorption process of Al(OH)4- and F- was driven by the potential rate-limiting step involved in mass transport process occurred on the boundary diffusion layer of porous adsorbent surface. Electrostatic interaction between protonated surface of La/Mg/Si-AC and negatively charged ions (i.e., Al(OH)4- and F-) as well as ion-exchange between hydroxide and ionic metal species were important mechanisms in the process of aluminum and fluoride adsorption. Driving forces for adsorption of individual Al(OH)4- and F- were not entirely different. Identifying the dominant mechanism will be helpful in understanding the adsorption process and developing new adsorbent. Mechanism of simultaneous removal of aluminum and fluoride by lanthanum/magnesium/silica -activated carbon are predicted.",

keywords = "Adsorption mechanism, Aluminum, Fluoride, Lanthanum/magnesium/silica-activated carbon",

author = "Minhee Kim and Choong, {Choe Earn} and Seunghun Hyun and Park, {Chang Min} and Gooyong Lee",

note = "Funding Information: This research was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education ( NRF-2018R1A6A1A03024962 ). Publisher Copyright: {\textcopyright} 2020",

year = "2020",

month = aug,

doi = "10.1016/j.chemosphere.2020.126580",

language = "English",

volume = "253",

journal = "Chemosphere",

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AU - Kim, Minhee

AU - Choong, Choe Earn

AU - Hyun, Seunghun

AU - Park, Chang Min

AU - Lee, Gooyong

N1 - Funding Information: This research was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education ( NRF-2018R1A6A1A03024962 ). Publisher Copyright: © 2020

PY - 2020/8

Y1 - 2020/8

N2 - La/Mg/Si-activated carbon derived from palm shell has been a suitable material for removal of aluminum and fluoride from aqueous solution. In the study, the mechanism of simultaneous removal of aluminum and fluoride by La/Mg/Si-activated carbon (La/Mg/Si-AC) was investigated to understand its high efficiency. It was found that the removal of aluminum and fluoride by La/Mg/Si-AC was favored at lower pH compared to the point of zero charge of La/Mg/Si-AC and high temperature. Adsorption capacity of Al(OH)4- was about 10 times higher than that of F- due to the strong binding affinity of Al(OH)4- on protonated surface and competition between F- and OH- toward charged adsorption site. Kinetics results showed that the aluminum and fluoride adsorption were explained using the pseudo-second-order kinetic model and intra-particle diffusion model. Adsorption process of Al(OH)4- and F- was driven by the potential rate-limiting step involved in mass transport process occurred on the boundary diffusion layer of porous adsorbent surface. Electrostatic interaction between protonated surface of La/Mg/Si-AC and negatively charged ions (i.e., Al(OH)4- and F-) as well as ion-exchange between hydroxide and ionic metal species were important mechanisms in the process of aluminum and fluoride adsorption. Driving forces for adsorption of individual Al(OH)4- and F- were not entirely different. Identifying the dominant mechanism will be helpful in understanding the adsorption process and developing new adsorbent. Mechanism of simultaneous removal of aluminum and fluoride by lanthanum/magnesium/silica -activated carbon are predicted.

AB - La/Mg/Si-activated carbon derived from palm shell has been a suitable material for removal of aluminum and fluoride from aqueous solution. In the study, the mechanism of simultaneous removal of aluminum and fluoride by La/Mg/Si-activated carbon (La/Mg/Si-AC) was investigated to understand its high efficiency. It was found that the removal of aluminum and fluoride by La/Mg/Si-AC was favored at lower pH compared to the point of zero charge of La/Mg/Si-AC and high temperature. Adsorption capacity of Al(OH)4- was about 10 times higher than that of F- due to the strong binding affinity of Al(OH)4- on protonated surface and competition between F- and OH- toward charged adsorption site. Kinetics results showed that the aluminum and fluoride adsorption were explained using the pseudo-second-order kinetic model and intra-particle diffusion model. Adsorption process of Al(OH)4- and F- was driven by the potential rate-limiting step involved in mass transport process occurred on the boundary diffusion layer of porous adsorbent surface. Electrostatic interaction between protonated surface of La/Mg/Si-AC and negatively charged ions (i.e., Al(OH)4- and F-) as well as ion-exchange between hydroxide and ionic metal species were important mechanisms in the process of aluminum and fluoride adsorption. Driving forces for adsorption of individual Al(OH)4- and F- were not entirely different. Identifying the dominant mechanism will be helpful in understanding the adsorption process and developing new adsorbent. Mechanism of simultaneous removal of aluminum and fluoride by lanthanum/magnesium/silica -activated carbon are predicted.

KW - Adsorption mechanism

KW - Aluminum

KW - Fluoride

KW - Lanthanum/magnesium/silica-activated carbon

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DO - 10.1016/j.chemosphere.2020.126580

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AN - SCOPUS:85083422154

SN - 0045-6535

VL - 253

JO - Chemosphere

JF - Chemosphere

M1 - 126580

ER -

Mechanism of simultaneous removal of aluminum and fluoride from aqueous solution by La/Mg/Si-activated carbon

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

UN SDGs

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