Adsorption of metal ions by clays and inorganic solids

Gupta, Sanjay; Bhattacharyya, Krishna G.

doi:10.1039/c4ra03673e

Cited by 107 publications

(53 citation statements)

References 256 publications

(300 reference statements)

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“…In recent years, because of high toxicity and price of palladium, growing interest has been paid to development of different heterogeneous palladium catalysts [19][20][21][22]. Magnesium oxide and clay minerals with high surface area can be found widely in nature and have been used as catalysts or as supports for stabilization of transition metal catalysts [23][24][25][26][27]. Rao and coworkers prepared water dispersible sheets of Mg-phyllo(organo)silicates containing pendant amino ligands and used it for stabilization of Au, Ag, Pd, and Pt nanoparticles [28].…”

Section: Introductionmentioning

confidence: 99%

A fluorescence active catalyst support comprising carbon quantum dots and magnesium oxide doping for stabilization of palladium nanoparticles: Application as a recoverable catalyst for Suzuki reaction in water

Gholinejad

Bahrami

Nájera

2017

Molecular Catalysis

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Novel magnesium oxide-carbon quantum dots have been synthesized and used for the formation and stabilization of palladium nanoparticles. This highly water dispersible material, Pd@MgO-CQD, has been used as an active catalyst for Suzuki coupling of aryl bromides at room temperature and aryl chlorides at 80 °C in water. Using fluorescence emission of the material, a new protocol for determine of Pd loading and leaching in catalyst preparation and recycling process was developed.

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Section: Introductionmentioning

confidence: 99%

A fluorescence active catalyst support comprising carbon quantum dots and magnesium oxide doping for stabilization of palladium nanoparticles: Application as a recoverable catalyst for Suzuki reaction in water

Gholinejad

Bahrami

Nájera

2017

Molecular Catalysis

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“…Adsorption is most commonly used for heavy metals remediation from water [15,16]. Activated carbons, clay minerals and chitosan/natural zeolites were used to remediate heavy metals from water and waste water [17,18].…”

Section: Introductionmentioning

confidence: 99%

Removal of heavy metals Pb(II), Cd(II) and Cu(II) from waste waters using synthesized chromium doped nickel oxide nano particles

Krishna¹,

Sandhya²,

Babu³

2018

Bull. Chem. Soc. Eth.

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ABSTRACT. Adsorption of metal ions Pb(II), Cd(II) and Cu(II) are observed on chromium doped nickel nano metal oxide. Chromium doped nickel oxide was synthesized by combustion technique using glycine as a fuel. In this work, transmission electronic microscopy (TEM), scanning electronic microscopy (SEM), X-ray diffraction (XRD) and Brunauer-Emmett-Teller (BET) are applied to study the composition and structure of chromium doped nickel oxide. Batch equilibrium experiments were performed to study the removal efficiency of heavy metal ions. The effects of different parameters such as contact time, pH and adsorbent dose on the adsorption process were investigated. The adsorption kinetics and adsorption isotherms studies were also performed. The formation of hydroxide on the surface of chromium doped nickel oxide could be the main factor of cations removal due to its high adsorption affinity for aqueous solutes. Chromium doped nickel oxide may offer a potential remediation method for the removal of metals from water and environment.

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“…2 Among them, adsorption is widely utilized due to its simplicity and low cost. 3 Many various adsorbents for this purpose have recently been investigated and special interest has been shown to polysaccharide-based adsorbents, which are biocompatible, biodegradable, and nontoxic. 4 During the past two decades, chitosan of abundant origin derived from chitin and a basic polysaccharide carrying amine pendant has been widely utilized as drug carrier and tissue scaffold, and for enzyme encapsulation and wastewater treatment.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of magnetic amidoximated chitosan-g poly(polyacrylonitrile)/laponite RD nanocomposites with enhanced adsorption capacity for Cu$^{2+}$

Mahdavinia¹,

Shokri²

2017

Turk J Chem

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Magnetic amidoximated nanocomposites based on a combination of chitosan and magnetic laponite RD were prepared and examined for the removal of Cu 2+ from aqueous solutions. Magnetic laponite RD was prepared by an in situ method. In order to prepare magnetic amidoximated nanocomposites, acrylonitrile was grafted to chitosan in the presence of magnetic laponite RD. Then the nitrile pendants on magnetic chitosan-g-polyacrylonitrile/laponite RD (mChtioPANLap) were converted to amidoxime groups. We developed a polyamidoximated magnetic nanocomposite based on a mixture of chitosan/laponite RD, possessing a high adsorption capacity for Cu 2+ . By introducing magnetic laponite RD the adsorption capacity of nanocomposites for Cu 2+ was significantly improved. The effects of contact time, initial concentration of Cu 2+ , initial pH of Cu 2+ solutions, and temperature on adsorption process were investigated.Studying adsorption kinetics showed that the experimental data are described better by the pseudo-second-order kinetic model. The adsorption of Cu 2+ on nanocomposites followed the Langmuir isotherm model well. Additionally, the fitting of isotherm data by the Dubinin-Radushkevich model showed that the adsorption process occurred by physisorption mechanism. The thermodynamic data indicated that the adsorption process was spontaneous and endothermic.

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Adsorption of metal ions by clays and inorganic solids

Abstract: This review deals with adsorption of metal ions, particularly those considered as hazardous, on clays and some inorganic solids and covers the publication years 2000–2013 describing and quantifying the use of isotherms to obtain the adsorption capacities of the solids.

Cited by 107 publications

References 256 publications

A fluorescence active catalyst support comprising carbon quantum dots and magnesium oxide doping for stabilization of palladium nanoparticles: Application as a recoverable catalyst for Suzuki reaction in water

A fluorescence active catalyst support comprising carbon quantum dots and magnesium oxide doping for stabilization of palladium nanoparticles: Application as a recoverable catalyst for Suzuki reaction in water

Removal of heavy metals Pb(II), Cd(II) and Cu(II) from waste waters using synthesized chromium doped nickel oxide nano particles

Synthesis and characterization of magnetic amidoximated chitosan-g poly(polyacrylonitrile)/laponite RD nanocomposites with enhanced adsorption capacity for Cu$^{2+}$

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