Antimonate Removal from Polluted Mining Water by Calcined Layered Double Hydroxides

Calcined layered double hydroxides (LDHs) can be used to remove Sb(V), in the Sb(OH)6− form, from aqueous solutions. Sorption batch experiments showed that the mixed MgAlFe oxides, obtained from calcined hydrotalcite-like compound (3HT-cal), removed Sb(OH)6− through the formation of a non-LDH brandholzite-like compound, whereas the mixed ZnAl oxides, resulting from calcined zaccagnaite-like compound (2ZC-cal), trapped Sb(OH)6− in the interlayer during the formation of a Sb(V)-bearing LDH (the zincalstibite-like compound). The competition effect of coexistent anions on Sb(OH)6− removal was HAsO42− >> HCO3− ≥ SO42− for 2ZC-cal and HAsO42− >> HCO3− >> SO42− for 3HT-cal. Considering the importance of assessing the practical use of calcined LDHs, batch experiments were also carried out with a slag drainage affected by serious Sb(V) pollution (Sb = 9900 μg/L) sampled at the abandoned Su Suergiu mine (Sardinia, Italy). Results showed that, due to the complex chemical composition of the slag drainage, dissolved Sb(OH)6− was removed by intercalation in the interlayer of carbonate LDHs rather than through the formation of brandholzite-like or zincalstibite-like compounds. Both 2ZC-cal and 3HT-cal efficiently removed very high percentages (up to 90–99%) of Sb(V) from the Su Suergiu mine drainage, and thus can have a potential application for real polluted waters.

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Interaction of U(VI) with ternary layered double hydroxides by combined batch experiments and spectroscopy study

Chemical Engineering Journal ◽

10.1016/j.cej.2018.01.055 ◽

2018 ◽

Vol 338 ◽

pp. 579-590 ◽

Cited By ~ 41

Author(s):

Shuang Song ◽

Ling Yin ◽

Xiangxue Wang ◽

Li Liu ◽

Shuyi Huang ◽

...

Keyword(s):

Layered Double Hydroxides ◽

Spectroscopy Study ◽

Batch Experiments ◽

Double Hydroxides

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Layered Double Hydroxides for the Catalytic Isomerization of Linoleic Acid to Conjugated Linoleic Acids (CLAs)

ChemEngineering ◽

10.3390/chemengineering3010030 ◽

2019 ◽

Vol 3 (1) ◽

pp. 30

Author(s):

Xavier Cardó ◽

Pilar Salagre ◽

Yolanda Cesteros

Keyword(s):

Linoleic Acid ◽

Layered Double Hydroxides ◽

Isomerization Reaction ◽

Complex Reaction ◽

Conjugated Linoleic Acids ◽

Nutritional Properties ◽

Condensation Products ◽

Catalytic Isomerization ◽

Double Hydroxides ◽

Very High

Several hydrotalcite-type compounds with different divalent (Mg2+, Ni2+, Cu2+, Zn2+) and trivalent (Al3+, Cr3+) cations and different ratio compositions were tested for the isomerization of linoleic acid in order to study their role on the obtention of specific conjugated linoleic acids (CLAs) with anticarcinogenic and nutritional properties. This is a complex reaction due to the high number of possible isomers of linoleic acid together with the significant competition of the isomerization reaction with other secondary undesired reactions. All catalysts showed very high conversions of linoleic acid, but condensation products were mainly obtained, especially for the hydrotalcite-type compounds with higher Mg/Al ratios due to their higher Brønsted basicity and for the catalysts with higher Ni2+ content or with the presence of Cu2+, Zn2+ in the layers because of the influence of the higher acidity of these cations on the Brønsted basicity of the hydroxides. The best results were achieved for the catalysts with Mg/Al ratio around 2.5–3, resulting in 29–38% of selectivity to the identified CLAs.

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Insight into the adsorption mechanisms of aqueous hexavalent chromium by EDTA intercalated layered double hydroxides: XRD, FTIR, XPS, and zeta potential studies

New Journal of Chemistry ◽

10.1039/c9nj03479j ◽

2019 ◽

Vol 43 (40) ◽

pp. 15915-15923 ◽

Cited By ~ 4

Author(s):

Jing Li ◽

Liangguo Yan ◽

Yanting Yang ◽

Xue Zhang ◽

Rixin Zhu ◽

...

Keyword(s):

Zeta Potential ◽

Hexavalent Chromium ◽

Layered Double Hydroxides ◽

Batch Experiments ◽

Adsorption Mechanisms ◽

Adsorption Performance ◽

Magnetic Product ◽

Double Hydroxides ◽

Insight Into

To understand the possible mechanisms of Cr(vi) adsorption on the surface of modified LDHs, we synthesized EDTA intercalated MgAl-LDH and its magnetic product, and evaluated their adsorption performance for Cr(vi) by batch experiments.

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Intercalation of a manganese(ii)-thiacalixarene luminescent complex in layered double hydroxides: synthesis and photophysical characterization

New Journal of Chemistry ◽

10.1039/d0nj04890a ◽

2021 ◽

Vol 45 (1) ◽

pp. 343-350

Author(s):

Niall O’Toole ◽

Constance Lecourt ◽

Yan Suffren ◽

François Toche ◽

Rodica Chiriac ◽

...

Keyword(s):

Layered Double Hydroxides ◽

High Sensitivity ◽

Luminescence Emission ◽

Double Hydroxides ◽

Very High

The luminescent complex [(ThiaSO2)2(MnII)4F]− (ThiaSO2 = p-tert-butylsulfonylcalixarene) was introduced between layered double hydroxides. The material displays a very high sensitivity to its luminescence emission with oxygen.

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Effect of Chain Length and Functional Group of Organic Anions on the Retention Ability of MgAl- Layered Double Hydroxides for Chlorinated Organic Solvents

ChemEngineering ◽

10.3390/chemengineering3040089 ◽

2019 ◽

Vol 3 (4) ◽

pp. 89 ◽

Cited By ~ 1

Author(s):

Karen Maria Dietmann ◽

Tobias Linke ◽

Raquel Trujillano ◽

Vicente Rives

Keyword(s):

Chain Length ◽

Organic Solvents ◽

Layered Double Hydroxides ◽

Functional Group ◽

Interlayer Space ◽

Organic Anions ◽

Batch Experiments ◽

Swelling Properties ◽

Chlorinated Organic ◽

Double Hydroxides

Nowadays, the contamination of groundwater and soils by chlorinated organic solvents is a severe and worldwide problem. Due to their swelling properties, Layered Double Hydroxides (LDHs) are potentially excellent compounds to retain chlorinated organic solvents from aquifers. By intercalating organic anions, the polarity of the interlayer space can be changed from hydrophilic to hydrophobic, enhancing the adsorption of chloro-organic molecules onto the alkyl chains of intercalated organic anions. In this study, organically modified LDHs were synthesized and their efficiency was tested in batch experiments with three different chlorinated organic solvents, namely trichloroethylene, 1,1,2-trichloroethane and trichloromethane (chloroform), to examine the influence of the chain length and the functional group of the intercalated organic anion upon the retention ability of a LDH due to different electronic interactions and different sizes of the interlayer space. All synthesized and used samples were characterized using powder X-ray diffraction, thermal analysis coupled with mass spectrometry and Fourier-transform infrared spectroscopy; freshly synthesized materials were additionally analyzed regarding their particle size distribution and specific surface area. Results of the batch experiments showed that only LDHs with intercalated long-chain organic anions could be efficient adsorbents for the removal of chlorinated organic solvents from contaminated water. A selective efficiency towards 1,1,2-trichloroethane and trichloromethane can be proposed for these reactants.

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Adsorption of Chloride Anion by Calcined Mg-Al-Fe Layered Double Hydroxides in Wastewater

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.423-426.545 ◽

2013 ◽

Vol 423-426 ◽

pp. 545-549 ◽

Cited By ~ 3

Author(s):

Wan You Zhang ◽

Ying Liu ◽

Li Juan Xi

Keyword(s):

Adsorption Capacity ◽

Calcination Temperature ◽

Layered Double Hydroxides ◽

Chloride Anion ◽

Maximum Adsorption Capacity ◽

Optimum Temperature ◽

Initial Concentration ◽

Calcined Hydrotalcite ◽

Adsorption Temperature ◽

Double Hydroxides

Mg-Al-Fe layered double hydroxides (LDHs) were prepared by coprecipitation method and calcined hydrotalcite (CLDH) was applied to remove chloride anion from wastewater. The influences of calcination temperature, adsorption temperature, adsorption dosage, pH on the removal of chloride have been investigated. The optimum temperature and range of pH were obtained in the experiments and the adsorption capacity reached the highest when the temperature was 30 °C and the pH was 5~11. The residual chloride anion was found to be 2 mg/L with an initial concentration of 100 mg/L. The maximum adsorption capacity was obtained at the LDH calcination temperature of 500 °C. Characterizations of the LDHs were performed using XRD and SEM.

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Interaction of U(vi) with α-MnO2@layered double hydroxides by combined batch experiments and spectroscopy studies

Inorganic Chemistry Frontiers ◽

10.1039/c9qi01316d ◽

2020 ◽

Vol 7 (2) ◽

pp. 487-497

Author(s):

Junping Ma ◽

Chen Wang ◽

Qiuyu Zhao ◽

Jianlin Ren ◽

Zhe Chen ◽

...

Keyword(s):

Layered Double Hydroxides ◽

Environmental Remediation ◽

Batch Experiments ◽

Biological Toxicity ◽

High Concern ◽

Long Life ◽

Spectroscopy Studies ◽

Double Hydroxides

Uranium is of high concern in the field of environmental remediation because of its high fluidity, radioactivity, biological toxicity and long life. Removing U(vi) from wastewater is of great significance to both environment and biology.

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Layered Double Hydroxides with Intercalated Permanganate and Peroxydisulphate Anions for Oxidative Removal of Chlorinated Organic Solvents Contaminated Water

Minerals ◽

10.3390/min10050462 ◽

2020 ◽

Vol 10 (5) ◽

pp. 462 ◽

Cited By ~ 1

Author(s):

Karen Maria Dietmann ◽

Tobias Linke ◽

Miguel del Nogal Sánchez ◽

José Luis Pérez Pavón ◽

Vicente Rives

Keyword(s):

Organic Solvents ◽

Layered Double Hydroxides ◽

Batch Experiments ◽

X Ray Diffraction ◽

Oxidation Processes ◽

Remediation Strategies ◽

Chlorinated Organic ◽

Hazardous Pollutants ◽

Double Hydroxides

The contamination by chlorinated organic solvents is a worldwide problem as they can deeply penetrate aquifers, accumulating in the sub-surface as lenses of highly hazardous pollutants. In recent years, so called in situ oxidation processes have been developed to remediate chlorinated organic solvents from groundwater and soil by injecting solutions of oxidising agents such as permanganate or peroxydisulphate. We here present modified layered double hydroxides (LDHs) with intercalated oxidising agents that might serve as new reactants for these remediation strategies. LDHs might serve as support and stabiliser materials for selected oxidising agents during injection, as the uncontrolled reaction and consumption might be inhibited, and guarantee that the selected oxidants persist in the subsurface after injection. In this study, LDHs with hydrotalcite- and hydrocalumite-like structures intercalated with permanganate and peroxydisulphate anions were synthesised and their efficiency was tested in batch experiments using trichloroethene or 1,1,2-trichloroethane as the target contaminants. All samples were characterised using powder X-ray diffraction, thermal analysis coupled with mass spectrometry to directly analyse evolving gases, and Fourier-transform infrared spectroscopy. Additionally, particle size distribution measurements were carried out on the synthesised materials. Results of the batch experiments confirmed the hypothesis that oxidising agents keep their properties after intercalation. Permanganate intercalated LDHs proved to be most efficient at degrading trichloroethene while peroxydisulphate intercalated Ca,Al-LDHs were the most promising studied reactants degrading 1,1,2-trichloroethane. The detection of dichloroethene as well as the transformation of the studied reactants into new LDH phases confirmed the successful degradation of the target contaminant by oxidation processes generated from the intercalated oxidising agent.

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