Adsorption of Cu2+, Cd2+ and Pb2+ ions by layered double hydroxides intercalated with the chelating agents diethylenetriaminepentaacetate and meso-2,3-dimercaptosuccinate

Pavlović, I.; Pérez, M.R.; Barriga, C.; Ulibarri, M.A.

doi:10.1016/j.clay.2008.07.020

Cited by 139 publications

(74 citation statements)

References 31 publications

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“…It indicates that the intercalation of EDTA into ZnAl-NO 3 gives rise to an increase in the basal spacing and the gallery height. The value is estimated for modified LDH, and it is closely agreement with the dimensions of previous EDTA complexes (0.9-1 nm) observed in single crystal XRD of M-EDTA (M: metal) compound [4,11,17,19].…”

Section: Synthesis and Characterization Of Ldhsupporting

confidence: 71%

“…Moreover, because of the stability constants of Zn-EDTA complexes and Al-EDTA complexes are 16.5 and 16.1, respectively, the presence of polidentate ligand also can result in this decrease [11,16,21]. While the C/N ratio (4.35) is similar to that of EDTA ligand (5), the little gap between them is mainly due to the registration of nitrate ions in the interlayer [19].…”

Section: Synthesis and Characterization Of Ldhmentioning

confidence: 85%

“…Considering the structure of LDHs, it is suggested that these materials can be intercalated easily with with other anions. LDHs modified with chelating agents as the potential adsorbents of heavy metals from the aqueous solution has been also studied [2,11,12]. The potential adsorbents for these compounds may be due to the stability of the chelates formed between ligands and metals.…”

Section: Introductionmentioning

confidence: 99%

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Adsorption of Cd(II) on Zn-Al LDHs (Layered Double Hydroxides) Intercalated with Chelating Agents EDTA

Zhang¹,

Kano²,

Inoue³

2016

JCCE

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Abstract:The hydrotalcite-like compound [Zn 2 Al(OH) 6 ]NO 3 ·mH 2 O (shorted as ZnAl-NO 3 ) was intercalated with the chelating agent EDTA (ethylene diamine tetraacetic acid) by anion exchange to uptake cadmium ion from aqueous solutions. The materials synthesized in this work were characterized by chemical analysis, FT-IR (fourier transform infrared spectroscopy), XRD (X-ray powder diffraction) to confirm their properties. In order to investigate the optimum conditions for Cd(II) adsorption, the amount of Cd(II) adsorbed by Zn-Al LDHs intercalated with EDTA (ZnAl-EDTA) under different conditions (i.e., adsorbent dosage, temperature and contact time) were determined by ICP-AES (inductively coupled plasma-atomic emission spectrometry). Adsorption isotherms of Cd(II) onto ZnAl-EDTA were measured at varying initial Cd concentrations (0.05 mg/L to 1 mg/L) under optimized conditions. The data were applied to Langmuir and Freundlich isotherms model, and well fitted by the Freundlich isotherms model. The pseudo-second-order kinetic model was more adequate to describe the kinetic in this case.

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Section: Synthesis and Characterization Of Ldhsupporting

confidence: 71%

Section: Synthesis and Characterization Of Ldhmentioning

confidence: 85%

Section: Introductionmentioning

confidence: 99%

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Adsorption of Cd(II) on Zn-Al LDHs (Layered Double Hydroxides) Intercalated with Chelating Agents EDTA

Zhang¹,

Kano²,

Inoue³

2016

JCCE

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“…Compared to LDH alone as an adsorbent, LDH-containing hybrids exhibit enhanced adsorption tendency of toxic pollutants due to their improvement in surface area [100][101][102][103], higher anion exchange tendency [104,105], better stability [106], increase in chelating and binding sites [107], excellent selectivity for different metal ions [108][109][110], low toxicity and ease in separation and reusability when hybridized with magnetic particles [111][112][113]. As a result of these superior properties, they are up-and-coming adsorbents for wastewater treatment.…”

Section: Heave Metal Capture In Liquid Wastementioning

confidence: 99%

Characteristics, Preparation Routes and Metallurgical Applications of LDHs: An Overview

Richetta¹

2017

J Material Sci Eng

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The peculiar properties of layered Double Hydroxides (LDH) have progressively drawn the attention of the scientific community. The main characteristic of LDH is the ability to capture anionic species (organic and inorganic) to build different composites. This is made possible by the sandwich structure of the LDH, similar to the brucite architecture, made up of positive charged lamellas interspersed by anions. Several distant fields, ranging from medicine to physics and engineering, exhibit interest in LDH applications. To satisfy all those requirements, energy was spent to sculpt LDHs physical and chemical properties and for designing layered double hydroxides "ad hoc" for different needs and employments. Notably, among the many applications, those related to metallurgical processes and products are of particular interest. This paper presents the characteristics, the main preparation routes and reviews the applications of LDH to metallurgy with some examples taken from the experimental research of the author.

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“…The selective adsorption of heavy metal ions was due to the effect of a confined field in the interlayer of LDH. Pavlovic et al (2009) investigated the adsorption of Cu 2+ , Cd 2+ , and Pb 2+ by LDHs intercalated with the chelating agents diethylenetriaminepentaacetate (dtpa) and meso-2,3-dimercaptosuccinate (dmsa). NO 3 •Zn-Al LDH was intercalated with the chelating agents dtpa and dmsa by anion exchange, and the adsorption of these metal ions occurred mainly www.intechopen.com through chelation by interlayer ligands.…”

Section: Ldh Intercalated With Carboxylatesmentioning

confidence: 99%

Hybrid Inorganic/Organic Composites of Layered Double Hydroxides Intercalated with Organic Acid Anions for the Uptake of Hazardous Substances from Aqueous Solution

Kameda¹,

Yoshioka²

2011

Metal, Ceramic and Polymeric Composites for Various Uses

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Adsorption of Cu2+, Cd2+ and Pb2+ ions by layered double hydroxides intercalated with the chelating agents diethylenetriaminepentaacetate and meso-2,3-dimercaptosuccinate

Cited by 139 publications

References 31 publications

Adsorption of Cd(II) on Zn-Al LDHs (Layered Double Hydroxides) Intercalated with Chelating Agents EDTA

Adsorption of Cd(II) on Zn-Al LDHs (Layered Double Hydroxides) Intercalated with Chelating Agents EDTA

Characteristics, Preparation Routes and Metallurgical Applications of LDHs: An Overview

Hybrid Inorganic/Organic Composites of Layered Double Hydroxides Intercalated with Organic Acid Anions for the Uptake of Hazardous Substances from Aqueous Solution

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