Removal of sulfate from aqueous solution using Mg–Al nano-layered double hydroxides synthesized under different dual solvent systems

Because of its priority to remove anions, nano-layered double hydroxide (LDH) was incorporated to improve the sulfate attack corrosion resistance of cement-based materials. Herein, the synthesis of high-efficiency LDH for removal of SO42−{\text{SO}}_{4}^{2-} is necessary. In this study, LDH with dif...

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Autores principales: Liu Xiaobo, Lu Shuang, Tang Zhen, Wang Zhaojia, Huang Tianyong
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Lenguaje:EN
Publicado: De Gruyter 2021
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spelling oai:doaj.org-article:66a6837f0ac44517841079a2888ef2502021-12-05T14:10:57ZRemoval of sulfate from aqueous solution using Mg–Al nano-layered double hydroxides synthesized under different dual solvent systems2191-909710.1515/ntrev-2021-0012https://doaj.org/article/66a6837f0ac44517841079a2888ef2502021-04-01T00:00:00Zhttps://doi.org/10.1515/ntrev-2021-0012https://doaj.org/toc/2191-9097Because of its priority to remove anions, nano-layered double hydroxide (LDH) was incorporated to improve the sulfate attack corrosion resistance of cement-based materials. Herein, the synthesis of high-efficiency LDH for removal of SO42−{\text{SO}}_{4}^{2-} is necessary. In this study, LDH with different Mg/Al ratios was synthesized under different dual solvent systems (water and ethylene glycol/ethanol/tetrapropylammonium hydroxide). Based on the adsorption experimental results, the LDH synthesized with n(Mg:Al) = 2:1 under water and ethanol solvent systems (ET2.0) exhibits the best adsorption capacity. The d (003) of LDH synthesized with n(Mg:Al) = 2:1 under different dual solvent systems are 0.7844, 0.7830, and 0.7946 nm, respectively. Three LDH belong to LDH-NO3−{\text{NO}}_{3}^{-}. The results indicated that their surface charges show obvious difference synthesized under different dual solvent systems, which leads to differences in adsorption performance. The adsorption experimental results show that ET2.0 followed pseudo second-order kinetics and Langmuir model. The ET2.0 removed SO42−{\text{SO}}_{4}^{2-} through anion substitution and electrostatic interaction and exhibited excellent adsorption rate with the maximum adsorption capacity of 95.639 mg/g. The effects of pore solution anion (OH−, Cl−, and CO32−{\text{CO}}_{3}^{2-}) on the removal of SO42−{\text{SO}}_{4}^{2-} by the ET2.0 are limited.Liu XiaoboLu ShuangTang ZhenWang ZhaojiaHuang TianyongDe Gruyterarticleldhnano-layeradsorption capacitycorrosion resistanceTechnologyTChemical technologyTP1-1185Physical and theoretical chemistryQD450-801ENNanotechnology Reviews, Vol 10, Iss 1, Pp 117-125 (2021)
institution DOAJ
collection DOAJ
language EN
topic ldh
nano-layer
adsorption capacity
corrosion resistance
Technology
T
Chemical technology
TP1-1185
Physical and theoretical chemistry
QD450-801
spellingShingle ldh
nano-layer
adsorption capacity
corrosion resistance
Technology
T
Chemical technology
TP1-1185
Physical and theoretical chemistry
QD450-801
Liu Xiaobo
Lu Shuang
Tang Zhen
Wang Zhaojia
Huang Tianyong
Removal of sulfate from aqueous solution using Mg–Al nano-layered double hydroxides synthesized under different dual solvent systems
description Because of its priority to remove anions, nano-layered double hydroxide (LDH) was incorporated to improve the sulfate attack corrosion resistance of cement-based materials. Herein, the synthesis of high-efficiency LDH for removal of SO42−{\text{SO}}_{4}^{2-} is necessary. In this study, LDH with different Mg/Al ratios was synthesized under different dual solvent systems (water and ethylene glycol/ethanol/tetrapropylammonium hydroxide). Based on the adsorption experimental results, the LDH synthesized with n(Mg:Al) = 2:1 under water and ethanol solvent systems (ET2.0) exhibits the best adsorption capacity. The d (003) of LDH synthesized with n(Mg:Al) = 2:1 under different dual solvent systems are 0.7844, 0.7830, and 0.7946 nm, respectively. Three LDH belong to LDH-NO3−{\text{NO}}_{3}^{-}. The results indicated that their surface charges show obvious difference synthesized under different dual solvent systems, which leads to differences in adsorption performance. The adsorption experimental results show that ET2.0 followed pseudo second-order kinetics and Langmuir model. The ET2.0 removed SO42−{\text{SO}}_{4}^{2-} through anion substitution and electrostatic interaction and exhibited excellent adsorption rate with the maximum adsorption capacity of 95.639 mg/g. The effects of pore solution anion (OH−, Cl−, and CO32−{\text{CO}}_{3}^{2-}) on the removal of SO42−{\text{SO}}_{4}^{2-} by the ET2.0 are limited.
format article
author Liu Xiaobo
Lu Shuang
Tang Zhen
Wang Zhaojia
Huang Tianyong
author_facet Liu Xiaobo
Lu Shuang
Tang Zhen
Wang Zhaojia
Huang Tianyong
author_sort Liu Xiaobo
title Removal of sulfate from aqueous solution using Mg–Al nano-layered double hydroxides synthesized under different dual solvent systems
title_short Removal of sulfate from aqueous solution using Mg–Al nano-layered double hydroxides synthesized under different dual solvent systems
title_full Removal of sulfate from aqueous solution using Mg–Al nano-layered double hydroxides synthesized under different dual solvent systems
title_fullStr Removal of sulfate from aqueous solution using Mg–Al nano-layered double hydroxides synthesized under different dual solvent systems
title_full_unstemmed Removal of sulfate from aqueous solution using Mg–Al nano-layered double hydroxides synthesized under different dual solvent systems
title_sort removal of sulfate from aqueous solution using mg–al nano-layered double hydroxides synthesized under different dual solvent systems
publisher De Gruyter
publishDate 2021
url https://doaj.org/article/66a6837f0ac44517841079a2888ef250
work_keys_str_mv AT liuxiaobo removalofsulfatefromaqueoussolutionusingmgalnanolayereddoublehydroxidessynthesizedunderdifferentdualsolventsystems
AT lushuang removalofsulfatefromaqueoussolutionusingmgalnanolayereddoublehydroxidessynthesizedunderdifferentdualsolventsystems
AT tangzhen removalofsulfatefromaqueoussolutionusingmgalnanolayereddoublehydroxidessynthesizedunderdifferentdualsolventsystems
AT wangzhaojia removalofsulfatefromaqueoussolutionusingmgalnanolayereddoublehydroxidessynthesizedunderdifferentdualsolventsystems
AT huangtianyong removalofsulfatefromaqueoussolutionusingmgalnanolayereddoublehydroxidessynthesizedunderdifferentdualsolventsystems
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