Removal of Mn and Cd contained in mine wastewater by Mg–Al-layered double hydroxides

Mir Tamzid Rahman; Tomohito Kameda; Takao Miura; Shogo Kumagai; Toshiaki Yoshioka

doi:10.1007/s10163-019-00875-9

Removal of Mn and Cd contained in mine wastewater by Mg–Al-layered double hydroxides

Mir Tamzid Rahman, Tomohito Kameda, Takao Miura, Shogo Kumagai, Toshiaki Yoshioka

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

11 Citations (Scopus)

Abstract

The fate of heavy metals in the environment is significantly influenced by their adsorption onto clay minerals. Herein, we investigate the mechanism of MnO₄ ⁻ and Cd²⁺ removal by nitrate-intercalated Mg–Al-layered double hydroxides (LDHs) in aqueous solution and optimize the corresponding conditions, showing that these adsorbents can effectively remove Zn, Mn, and Cd from mine wastewater and revealing that adsorbent structure is retained after wastewater treatment. The removal of MnO₄ ⁻ ions from aqueous solution is demonstrated to proceed via their exchange for NO₃ ⁻ ions intercalated within LDHs and is well described by the Freundlich adsorption model, following pseudo-second-order kinetics and featuring chemisorption as the rate-determining step. In contrast, Cd²⁺ is shown to be removed via the formation of Cd₅(OH)₈(NO₃)₂·2H₂O (at LDH2) and Cd(NO₃)₂·Cd(OH)₂ (at LDH1).

Original language	English
Pages (from-to)	1232-1241
Number of pages	10
Journal	Journal of Material Cycles and Waste Management
Volume	21
Issue number	5
DOIs	https://doi.org/10.1007/s10163-019-00875-9
Publication status	Published - 2019 Sept 13

Keywords

Adsorption
Cadmium
Manganese
Mg–Al-layered double hydroxides
Mine wastewater

ASJC Scopus subject areas

Waste Management and Disposal
Mechanics of Materials

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10.1007/s10163-019-00875-9

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title = "Removal of Mn and Cd contained in mine wastewater by Mg–Al-layered double hydroxides",

abstract = "The fate of heavy metals in the environment is significantly influenced by their adsorption onto clay minerals. Herein, we investigate the mechanism of MnO4 − and Cd2+ removal by nitrate-intercalated Mg–Al-layered double hydroxides (LDHs) in aqueous solution and optimize the corresponding conditions, showing that these adsorbents can effectively remove Zn, Mn, and Cd from mine wastewater and revealing that adsorbent structure is retained after wastewater treatment. The removal of MnO4 − ions from aqueous solution is demonstrated to proceed via their exchange for NO3 − ions intercalated within LDHs and is well described by the Freundlich adsorption model, following pseudo-second-order kinetics and featuring chemisorption as the rate-determining step. In contrast, Cd2+ is shown to be removed via the formation of Cd5(OH)8(NO3)2·2H2O (at LDH2) and Cd(NO3)2·Cd(OH)2 (at LDH1).",

keywords = "Adsorption, Cadmium, Manganese, Mg–Al-layered double hydroxides, Mine wastewater",

author = "Rahman, {Mir Tamzid} and Tomohito Kameda and Takao Miura and Shogo Kumagai and Toshiaki Yoshioka",

note = "Funding Information: Acknowledgements The authors acknowledge financial support from the Japan Oil, Gas and Metals National Corporation (JOGMEC). Publisher Copyright: {\textcopyright} 2019, Springer Japan KK, part of Springer Nature.",

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AU - Miura, Takao

AU - Kumagai, Shogo

AU - Yoshioka, Toshiaki

N1 - Funding Information: Acknowledgements The authors acknowledge financial support from the Japan Oil, Gas and Metals National Corporation (JOGMEC). Publisher Copyright: © 2019, Springer Japan KK, part of Springer Nature.

PY - 2019/9/13

Y1 - 2019/9/13

N2 - The fate of heavy metals in the environment is significantly influenced by their adsorption onto clay minerals. Herein, we investigate the mechanism of MnO4 − and Cd2+ removal by nitrate-intercalated Mg–Al-layered double hydroxides (LDHs) in aqueous solution and optimize the corresponding conditions, showing that these adsorbents can effectively remove Zn, Mn, and Cd from mine wastewater and revealing that adsorbent structure is retained after wastewater treatment. The removal of MnO4 − ions from aqueous solution is demonstrated to proceed via their exchange for NO3 − ions intercalated within LDHs and is well described by the Freundlich adsorption model, following pseudo-second-order kinetics and featuring chemisorption as the rate-determining step. In contrast, Cd2+ is shown to be removed via the formation of Cd5(OH)8(NO3)2·2H2O (at LDH2) and Cd(NO3)2·Cd(OH)2 (at LDH1).

AB - The fate of heavy metals in the environment is significantly influenced by their adsorption onto clay minerals. Herein, we investigate the mechanism of MnO4 − and Cd2+ removal by nitrate-intercalated Mg–Al-layered double hydroxides (LDHs) in aqueous solution and optimize the corresponding conditions, showing that these adsorbents can effectively remove Zn, Mn, and Cd from mine wastewater and revealing that adsorbent structure is retained after wastewater treatment. The removal of MnO4 − ions from aqueous solution is demonstrated to proceed via their exchange for NO3 − ions intercalated within LDHs and is well described by the Freundlich adsorption model, following pseudo-second-order kinetics and featuring chemisorption as the rate-determining step. In contrast, Cd2+ is shown to be removed via the formation of Cd5(OH)8(NO3)2·2H2O (at LDH2) and Cd(NO3)2·Cd(OH)2 (at LDH1).

KW - Adsorption

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KW - Manganese

KW - Mg–Al-layered double hydroxides

KW - Mine wastewater

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Removal of Mn and Cd contained in mine wastewater by Mg–Al-layered double hydroxides

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Keywords

ASJC Scopus subject areas

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