Adsorption of anionic species on hydrotalcite-like compounds: effect of interlayer anion and crystallinity

Ulibarri, M.A.; Pavlović, I.; Barriga, C.; Hermosı́n, M.C.; Cornejo, J.

doi:10.1016/s0169-1317(00)00026-0

Cited by 234 publications

(100 citation statements)

References 26 publications

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“…It can be observed that a series of (0 0 l) peaks appear as sharp, intense and descending in orresponds to the (1 1 0) crystal plane. Hence, the XRD pattern of the Mg/Al HTlc consists of both sharp and symmetrical peaks with some asymmetrical peaks at high angle, indicating good crystallinity [15]. It was thought that carbonate ion was intercalated into the product due to (0 0 3), (0 0 6) reflection of Mg/Al HTlc intercalated carbonate ion are around 7.58 and 3.80Å.…”

Section: Characterization Of the Adsorbentmentioning

confidence: 97%

Anionic and Cationic Dyes Removal from Aqueous Solutions by Adsorption onto Synthetic Mg/Al Hydrotalcite-Like Compound

Heraldy¹,

Santosa²,

Triyono³

et al. 2015

Indones. J. Chem.

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Section: Characterization Of the Adsorbentmentioning

confidence: 97%

Anionic and Cationic Dyes Removal from Aqueous Solutions by Adsorption onto Synthetic Mg/Al Hydrotalcite-Like Compound

Heraldy¹,

Santosa²,

Triyono³

et al. 2015

Indones. J. Chem.

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“…Under the same conditions, the adsorption capacity of Mg 2 AlC 2 O 4 -LDH (35%) is higher than that of the original LDH (23%). This is due to the expansion of the interlayer space of the former and the complexation of nickel ions by the oxalate ions [9], [14].…”

Section: Thermal Analysismentioning

confidence: 99%

“…As a result, natural clay minerals as well as LDHs show rather weak affinity towards most ionic metal compounds and are seldom used as sorbents for heavy metals [7][8]. Under suitable conditions, the inorganic ions in clay minerals and LDHs can be replaced by organic ions which make the interlayer spaces hydrophobic [9][10] and more sensitive to heavy metal ions. These organoclays and organo/LDHs have applications in a wide range of organic pollution control fields.…”

Section: Introductionmentioning

confidence: 99%

Intercalation of oxalate ions in the interlayer space of a layered double hydroxide for nickel ions adsorption

Doungmo

Kamgaing²,

Temgoua³

et al. 2016

IJBAS

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In this study, sorption properties of a synthesized anionic clay were enhanced by the intercalation of oxalate ions in its interlayer space. The pristine and modified clay materials were characterized by X-ray diffraction, Fourier transform infrared spectroscopy and thermal analysis. These techniques confirmed the presence of oxalate ions in the interlayer space of the clay. The intercalated clay was then used as a matrix for the sorption in batch mode of nickel ions in aqueous solution. The influence of a number of parameters such as contact time, pH, initial concentration of the analyte and adsorbent dosage were studied. The maximum adsorption of nickel was obtained at pH 6, that is, about 90% Ni 2+ removal. The adsorbent/adsorbate equilibrium follows a pseudo-second order kinetics and best matches the Langmuir model. The modified clay was shown to be efficient matrix for the sorption of nickel ions.

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“…LDHs (like CO 3 2-, Cl -, SO 4 2-, and various organic carboxylates, sulfates, sulfonates), respectively, where n is the number of associated water molecules [8].…”

Section: Introductionmentioning

confidence: 99%

A new route to prepare nanocomposites based on polyvinyl chloride and MgAl layered double hydroxide intercalated with laurylether phosphate

Huang¹,

Wang²

2009

Express Polym. Lett.

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Abstract. The MgAl layered double hydroxide (LDH) with laurylether phosphate was prepared using reconstruction method. Delamilation of the LDH with laurylether phosphate (LDH-PK) in tetrahydrofuran was characterized by AFM (atomic force microscopy), indicating that a large part of the LDH was delaminated into single, double and multi layers. The delaminated LDH-PK suspension was then used with polyvinyl chloride (PVC) to prepare a series of high-LDH-loading nanocomposites. Both the XRD (X-ray diffraction) patterns and TEM (transmission electron microscopy) photographs of the as-prepared PVC/LDH nanocomposites indicated that the LDH nanolayers dispersed uniformly in the PVC matrix. With differential scanning calorimetry (DSC) the glass transition temperatures of PVC phases in the PVC/LDH nanocomposites were measured and a slightly lower value than that of pristine PVC has been observed. Thermogravimetric analysis results show that the presence of LDH enhanced the dehydrochlorination temperature (Tmax1), reduced the maximum degradation rate (Rmax1) and the 5% weight loss temperature, and promoted the char formation of PVC. However, the thermal degradation temperature (Tmax2) and thermal degradation rate (Rmax2) of the dehydrochlorinated PVC were slightly affected by the presence of LDH. The apparent activation energies were calculated by the method of Flynn-Wall-Ozawa in nitrogen at four different heating rates, showing that the nanofiller increased the apparent activation energies by 10-26 kJ/mol when compared with pristine PVC, probably implying that the LDH nanolayers improve the stability of chlorine atom on the PVC chains.

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Adsorption of anionic species on hydrotalcite-like compounds: effect of interlayer anion and crystallinity

Cited by 234 publications

References 26 publications

Anionic and Cationic Dyes Removal from Aqueous Solutions by Adsorption onto Synthetic Mg/Al Hydrotalcite-Like Compound

Anionic and Cationic Dyes Removal from Aqueous Solutions by Adsorption onto Synthetic Mg/Al Hydrotalcite-Like Compound

Intercalation of oxalate ions in the interlayer space of a layered double hydroxide for nickel ions adsorption

A new route to prepare nanocomposites based on polyvinyl chloride and MgAl layered double hydroxide intercalated with laurylether phosphate

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