Preparation of a new stable hybrid material by chloride–2,4-dichlorophenoxyacetate ion exchange into the zinc–aluminium–chloride layered double hydroxide

Lakraimi, Mohamed; Legrouri, A.; Barroug, Allal; Roy, A. De; Besse, J.P.

doi:10.1039/a909047i

Cited by 95 publications

(48 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Among the different adsorbents, layered double hydroxides (LDHs), also known as hydrotalcite-like compounds or anionic clays, are promising waste scavengers, particularly for dye molecules (Allmann 1968). Recent studies showed that the use of LDHs for the retention of organic anions has given very good results (De Roy et al 1992;Lakraimi et al 2000).…”

Section: Introductionmentioning

confidence: 99%

Removal of Remazol Blue 19 from wastewater by zinc–aluminium–chloride-layered double hydroxides

et al. 2013

Self Cite

View full text Add to dashboard Cite

Layered double hydroxides (LDHs), also called anionic clays, consist of cationic brucite-like layers and exchangeable interlayer anions. These hydrotalcite-like compounds, with Zn and Al in the layers and chloride in the interlayer space, were prepared following the coprecipitation method at constant pH. The affinity of this material for Remazol Blue 19, RB19 [2-(3-(4-Amino-9,10-dihydro-3-sulpho-9,10-dioxoanthracen-4-yl) aminobenzenesulphonyl) vinyl) disodiumsulphate], was studied as a function of contact time, pH of the solutions LDH dose and the RB19/[Zn-Al-Cl] mass ratio. It was found that 48 h is enough time for the equilibrium state to be reached with maximum RB19 retention at pH of 9 for an LDH dose equal to 100 mg and with an RB19/[Zn-Al-Cl] mass ratio higher than 3. The adsorption isotherm, described by the Langmuir model, is of L-type. The results demonstrate that RB19 retention on LDHs occurs by adsorption on external surface when RB19/[Zn-Al-Cl] mass ratio is equal or \3 and by both adsorption and interlayer ion exchange for ratios higher than 3. A mechanism for removal of RB19 anion has been confirmed by X-ray diffraction, IR spectroscopy and TG analysis (TG and DTG curves).

show abstract

Section: Introductionmentioning

confidence: 99%

Removal of Remazol Blue 19 from wastewater by zinc–aluminium–chloride-layered double hydroxides

et al. 2013

Self Cite

View full text Add to dashboard Cite

show abstract

“…According to the literature, materials that are of interest for the adsorption of CO 2 are mostly calcium oxides, [3][4][5] lithium oxides, [6][7][8] and hydrotalcites. [9][10][11] However, most of the commonly studied adsorbents (e.g., zeolites and activated carbon) suffer from low capacity at elevated temperatures because the CO 2 adsorption capacity of these materials decreases drastically with increasing temperature. The key improvement for such a process is to develop adsorbent materials that are capable of capturing CO 2 at high temperatures.…”

Section: Introductionmentioning

confidence: 99%

Ca‐Rich Ca–Al‐Oxide, High‐Temperature‐Stable Sorbents Prepared from Hydrotalcite Precursors: Synthesis, Characterization, and CO₂ Capture Capacity

Chang

Chen

et al. 2011

ChemSusChem

View full text Add to dashboard Cite

We present the design and synthesis of Ca-rich Ca-Al-O oxides, with Ca(2+)/Al(3+) ratios of 1:1, 3:1, 5:1, and 7:1, which were prepared by hydrothermal decomposition of coprecipitated hydrotalcite-like Ca-Al-CO(3) precursors, for high-temperature CO(2) adsorption at 500-700 °C. In situ X-ray diffraction measurements indicate that the coprecipitated, Ca-rich, hydrotalcite-like powders with Ca(2+)/Al(3+) ratios of 5:1 and 7:1 contained Ca(OH)(2) and layered double hydroxide (LDH) phases. Upon annealing, LDH was first destroyed at approximately 200 °C to form an amorphous matrix, and then at 450-550 °C, the Ca(OH)(2) phase was converted into a CaO matrix with incorporated Al(3+) to form a homogeneous solid solution without a disrupted lattice structure. CaO nanocrystals were grown by thermal treatment of the weakly crystalline Ca-Al-O oxide matrix. Thermogravimetric analysis indicates that a CO(2) adsorption capacity of approximately 51 wt. % can be obtained from Ca-rich Ca-Al-O oxides prepared by calcination of 7:1 Ca-Al-CO(3) LDH phases at 600-700 °C. Furthermore, a relatively high CO(2) capture capability can be achieved, even with gas flows containing very low CO(2) concentrations (CO(2)/N(2) = 10 %). Approximately 95.6 % of the initial CO(2) adsorption capacity of the adsorbent is retained after 30 cycles of carbonation-calcination. TEM analysis indicates that carbonation-promoted CaCO(3) formation in the Ca-Al-O oxide matrix at 600 °C, but a subsequent desorption in N(2) at 700 °C, caused the formation CaO nanocrystals of approximately 10 nm. The CaO nanocrystals are widely distributed in the weakly crystalline Ca-Al-O oxide matrix and are present during the carbonation-calcination cycles. This demonstrates that Ca-Al-O sorbents that developed through the synthesis and calcination of Ca-rich Ca-Al LDH phases are suitable for long-term cyclic operation in severe temperature environments.

show abstract

“…In the case of hydrophobic chemicals, this arrangement prevents re-crystallisation, increases solubility, and therefore bioavailability. A number of research activities have been completed with regards to layered double hydroxides as pesticides, growth regulators, plant nutrients, and slow-release fertilizer (Olanrewaju et al, 2000;Lakraimi et al, 2000). Imazapyr (IMP), a herbicide was bound to polydiallyldimethyl ammonium chloridemontmorillonite composites for reducing the leaching of IMP.…”

Section: Nanocomposite For Controlled Release Of Pesticidementioning

confidence: 99%

Neem Seed Oil: Encapsulation and Controlled Release - Search for a Greener Alternative for Pest Control

Devi¹,

Maji²

2011

Pesticides in the Modern World - Pesticides Use and Management

View full text Add to dashboard Cite

Preparation of a new stable hybrid material by chloride–2,4-dichlorophenoxyacetate ion exchange into the zinc–aluminium–chloride layered double hydroxide

Cited by 95 publications

References 21 publications

Removal of Remazol Blue 19 from wastewater by zinc–aluminium–chloride-layered double hydroxides

Removal of Remazol Blue 19 from wastewater by zinc–aluminium–chloride-layered double hydroxides

Ca‐Rich Ca–Al‐Oxide, High‐Temperature‐Stable Sorbents Prepared from Hydrotalcite Precursors: Synthesis, Characterization, and CO₂ Capture Capacity

Neem Seed Oil: Encapsulation and Controlled Release - Search for a Greener Alternative for Pest Control

Contact Info

Product

Resources

About

Preparation of a new stable hybrid material by chloride–2,4-dichlorophenoxyacetate ion exchange into the zinc–aluminium–chloride layered double hydroxide

Cited by 95 publications

References 21 publications

Removal of Remazol Blue 19 from wastewater by zinc–aluminium–chloride-layered double hydroxides

Removal of Remazol Blue 19 from wastewater by zinc–aluminium–chloride-layered double hydroxides

Ca‐Rich Ca–Al‐Oxide, High‐Temperature‐Stable Sorbents Prepared from Hydrotalcite Precursors: Synthesis, Characterization, and CO2 Capture Capacity

Neem Seed Oil: Encapsulation and Controlled Release - Search for a Greener Alternative for Pest Control

Contact Info

Product

Resources

About

Ca‐Rich Ca–Al‐Oxide, High‐Temperature‐Stable Sorbents Prepared from Hydrotalcite Precursors: Synthesis, Characterization, and CO₂ Capture Capacity