Synthesis, characterization and sorption studies of nano lanthanum oxide

Moothedan, Marymol; Sherly, K. B.

doi:10.1016/j.jwpe.2015.11.002

Cited by 37 publications

(11 citation statements)

References 35 publications

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“…Electropositive lanthanum causes the generation and widening of pores and acts as an electron acceptor to attract phenol, the target organic molecules chosen for adsorption. A similar mechanism occurs by electrostatic interaction between positively charged surface of lanthanum ion and anionic dye as described in the literature . This supports the presence of La 3+ enhances the adsorption efficiency of GAC in many ways for a better carbon material.…”

Section: Resultssupporting

confidence: 84%

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Lanthanum ion–impregnated granular activated carbon for the removal of phenol from aqueous solution: Equilibrium and kinetic study

Achari

Lopez

Jayasree

et al. 2019

Int J of Chemical Kinetics

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The current study discusses application of the lanthanum ions (La 3+ ) as an activating agent incorporated /immobilized into coconut shell-based granular activated carbon (GAC) for porosity development; subsequently, the carbon material is used for the adsorption of phenol from aqueous solutions. The new carbons were characterized using FTIR, XRD, CHNO, burn off, and carbon yield. The surface functional groups were determined by Boehm titration. The Brunauer-Emmett-Teller (BET) surface area of the carbons is 953 m 2 g −1 (GACLa1073), 997 m 2 g −1 (GAC383), and 973 m 2 g −1 (GACO383). Langmuir, Freundlich, Dubinin-Radushkevich, and John-Sivanandan Achari (J-SA) isotherm models on the equilibrium isotherm data were examined for the new carbon-phenol system. It is found that the Langmuir isotherm fits better with a monolayer adsorption capacity, highest for GACLa1073 (387.59 mg g −1 ) followed by GAC383 (303.03 mg g −1 ) and GACO383 (197.62 mg g −1 ). Kinetic studies reveal that the adsorption system follows the pseudo-second-order kinetic model. Isotherm analysis by the phase change method of John-Sivanandan Achari (J-SA) isotherm gives a better insight into adsorption phenomena, which is accompanied by regeneration studies of carbon with >75% for GACLa1073 after three cycles. K E Y W O R D Sadsorption, granular activated carbon, John-Sivanandan Achari isotherm, kinetics, lanthanum ions Int J Chem Kinet. 2019;51:215-231.

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Section: Resultssupporting

confidence: 84%

“…Lanthanum‐modified mesoporous carbons are used for the removal of methyl orange dye . Also, nano‐La 2 O 3 is reported for removing Congo red dye. Goscianska et al reported the use of lanthanum‐bearing carbon for chromotrope 2R dye adsorption in batch reactors.…”

Section: Introductionmentioning

confidence: 99%

Lanthanum ion–impregnated granular activated carbon for the removal of phenol from aqueous solution: Equilibrium and kinetic study

Achari

Lopez

Jayasree

et al. 2019

Int J of Chemical Kinetics

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“…It is highly probable that all CO 3 2− groups occupy identical sites in the crystal lattice, so the lanthanum oxide precursor might be lanthanum carbonate due to the basic properties of La 2 O 3 which can further react with atmospheric CO 2 and water [33,34]. The sharp bands at 498, 672, 846, and 1050 cm −1 were assigned to the stretching vibration of the La-O bond in La 2 O 3 [12,35]. The XRD pattern in Figure 1b shows the phases of La [36].…”

Section: Characterizationmentioning

confidence: 99%

“…In lanthanide series, lanthanum (La) is one of the lightest elements that has been widely used in various applications, including optoelectronic devices [5], phosphors [6], solid electrolytes [7], catalysts [8,9], sorbents [10], and gas sensors [11] in the form of oxide, carbonate, and phosphate. Currently, lanthanum oxide (La 2 O 3 ) is used in various applications, including water treatment [12,13], catalytic exhaust gas converters [14], and high-k gate dielectric materials [15]. Various methods have been adopted for the preparation of La 2 O 3 nanostructures, including precipitation, thermal decomposition, hydrothermal, sol gel, and pyrolysis methods [13,[15][16][17][18][19][20][21][22][23][24].…”

Section: Introductionmentioning

confidence: 99%

Facile Synthesis, Characterization, and Adsorption Insights of Lanthanum Oxide Nanorods

Lingamdinne

Koduru

Chang

et al. 2020

Metals

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This study synthesized lanthanum oxide (La2O3) nanorods to develop a practical approach for the removal of arsenic from groundwater. La2O3 nanorods were synthesized by a simple hydrothermal process followed by calcination at 500 °C and were characterized by spectroscopic and microscopic techniques. To evaluate the adsorption mechanism of La2O3 nanorods, adsorption parameters including solution pH, temperature, equilibrium isotherms, and kinetics for arsenic were studied. The results suggested that the arsenic uptake was a rate-limiting, monolayer adsorption interaction on the La2O3 nanorods homogeneous surface. In addition, it was found that the adsorptive removal behavior of La2O3 for As(V) was sensitive to the initial pH and temperature, and the maximum uptake amount of as prepared La2O3 was found to be 260.56 mg/g of As(V) at pH 6.0 and 25 °C. Furthermore, the uptake capacity of La2O3 nanorods for As(V) increased with temperature. The resultant thermodynamic parameters (ΔG0, ΔH0, and ΔS0) suggested an endothermic adsorption of As(V) on La2O3. The adsorption capacity of La2O3 was higher than that of several reported nanocomposites, suggesting its practical applicability and novelty for As-contaminated wastewater treatment.

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“…[15][16][17][18][19]. A several methods have developed for the synthesizing of La2O3 ultrafine powders, nanopowders, nanorods, nanowires, nanosheets, nanoneedles, nanobundles and nanoparticles, incorporate with sol-gel [20,21], hydrothermal [22,23], sonochemical [24,25], microwave [26], solvo-thermal [27], laser deposition [28], thermal decomposition [29], chemical precipitation [30], reveres micelles [31], arc-discharge [32], green carbonation [33], starch template [34] and other chemical and physical techniques. All these methods have their own advantages and disadvantages.…”

Section: Introductionmentioning

confidence: 99%

Influence of calcination on the sol–gel synthesis of lanthanum oxide nanoparticles

et al. 2018

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Synthesis, characterization and sorption studies of nano lanthanum oxide

Cited by 37 publications

References 35 publications

Lanthanum ion–impregnated granular activated carbon for the removal of phenol from aqueous solution: Equilibrium and kinetic study

Lanthanum ion–impregnated granular activated carbon for the removal of phenol from aqueous solution: Equilibrium and kinetic study

Facile Synthesis, Characterization, and Adsorption Insights of Lanthanum Oxide Nanorods

Influence of calcination on the sol–gel synthesis of lanthanum oxide nanoparticles

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