Improvement in adsorption of Hg 2+ from aqueous media using sodium-type fine zeolite grains

To increase the adsorption capability of Hg from aqueous media, we prepared sodium-type fine zeolite grains with various particle sizes (denoted as ZE1, ZE2 and ZE3). The particle sizes of ZE1, ZE2 and ZE3 were 16.363 ± 0.365, 1.454 ± 0.357 and 0.607 ± 0.377 μm, respectively. Moreover, the CEC, spec...

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Published in:Water science and technology 2022-05, Vol.85 (10), p.2827
Main Authors: Ogata, Fumihiko, Nagai, Noriaki, Ito, Chihiro, Kobayashi, Yuhei, Yamaguchi, Mizuki, Tabuchi, Ayako, Saenjum, Chalermpong, Nakamura, Takehiro, Kawasaki, Naohito
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Adsorption
Ions
Mercury - chemistry
Sodium
Zeolites - chemistry
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creator Ogata, Fumihiko
Nagai, Noriaki
Ito, Chihiro
Kobayashi, Yuhei
Yamaguchi, Mizuki
Tabuchi, Ayako
Saenjum, Chalermpong
Nakamura, Takehiro
Kawasaki, Naohito
description To increase the adsorption capability of Hg from aqueous media, we prepared sodium-type fine zeolite grains with various particle sizes (denoted as ZE1, ZE2 and ZE3). The particle sizes of ZE1, ZE2 and ZE3 were 16.363 ± 0.365, 1.454 ± 0.357 and 0.607 ± 0.377 μm, respectively. Moreover, the CEC, specific surface area and pore volume were in the order ZE1 (42 mmol/g and 23.5 m /g) < ZE2 (72 mmol/g and 67.1 m /g) < ZE3 (135 mmol/g and 176.6 m /g). Subsequently, the Hg adsorption capability was investigated. The performance of tested agents on Hg adsorbed was in the order ZE1 (5.0 mg/g) < ZE2 (9.4 mg/g) < ZE3 (20.2 mg/g). It was concluded that fine crystalline zeolite was important in enhancing the adsorption capability of Hg . In addition, the mechanism of adsorption of Hg on the ZE samples was evaluated. Our results suggested that Hg was exchanged with sodium ions in the interlayers of ZE samples with correlation coefficients of 0.966-0.979. Our findings revealed that these ZE samples constitute potential agents for the adsorption of Hg from aqueous media.
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subjects Adsorption
Ions
Mercury - chemistry
Sodium
Zeolites - chemistry
title Improvement in adsorption of Hg 2+ from aqueous media using sodium-type fine zeolite grains
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