Uptake of chloride ion from aqueous solution by calcined layered double hydroxides: Equilibrium and kinetic studies

Lv, Liang; He, Jing; Wei, Min; Evans, D. Gareth; Duan, Xue

doi:10.1016/j.watres.2005.11.043

Cited by 216 publications

(103 citation statements)

References 32 publications

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“…The pseudo-second order model (PSO) is given by the following expression: (14) where: K 2 : Second order reaction rate of adsorption of the dye on the adsorbents in (g.mg . t: contact time (min).…”

Section: Pseudo-second Order Model (Pso)mentioning

confidence: 99%

Evaluation of Adsorption Capacity of Methylene Blue in Aqueous Medium by Two Adsorbents: The Raw Hull of <i>Lophira Lanceolata</i> and Its Activated Carbon

Sogbochi¹,

Balogoun²,

Dossa³

et al. 2017

AJPC

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Abstract:The purpose of this study is to evaluate the adsorption capacity of two adsorbents from the lignocellulosic residues of Lophira Lanceolata. The raw hull of Lophira Lanceolata and its activated carbon produced by chemical activation with orthophosphoric acid (H 3 PO 4 ) at 50% (Vacid/V water ) of the said hull. The ratio of impregnation to orthophosphoric acid used is 4.5. Activation and carbonization were carried out at 400°C. The physicochemical properties of the prepared activated carbon were determined and methylene blue adsorption tests were performed. On the basis of the results obtained, the iodine test revealed that the activated carbon produced had a microporosity of 646.81 mg/g, a density of 0.3156, a moisture content of less than 15% and ash content equal to 2%. Regarding the adsorption, results showed that methylene blue (100 ppm) adsorbed more easily on the activated carbon produced than on the crude residues with respective contact time of 10 minutes and 40 minutes. The removal rate was of the order of 100% for the activated carbon and of 83.56% for the raw hulls. Furthermore, an influence of the mass of the support, of the initial concentration and of the pH on the kinetics and on the adsorption capacity was observed. Kinetics obeyed to the pseudo-second order model; the diffusion was intra-particular and the Freundlich and Langmuir models satisfactorily described the adsorption of methylene blue respectively on the crude residues and on the produced activated carbon.

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Section: Pseudo-second Order Model (Pso)mentioning

confidence: 99%

Evaluation of Adsorption Capacity of Methylene Blue in Aqueous Medium by Two Adsorbents: The Raw Hull of <i>Lophira Lanceolata</i> and Its Activated Carbon

Sogbochi¹,

Balogoun²,

Dossa³

et al. 2017

AJPC

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“…19 Several studies have been taking advantage of this socalled "structure memory effect", to obtain elevated removal efficiency for various targeted oxyanions. 12,20 During the rehydration process, it is likely that also metal cations in solution can be incorporated into metal hydroxide layers, whereas this has hardly being explored. To the best of our knowledge, no study has been done on the removal of cationic metallic elements particularly Ni(II) by using the calcined LDHs.…”

Section: Introductionmentioning

confidence: 99%

Synergistic effect of humic and fulvic acids on Ni removal by the calcined Mg/Al layered double hydroxide

Fang

Chen

et al. 2015

RSC Adv.

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Discharge of Ni(II) containing wastewater to terrestrial environment can lead to serious pollution issues. This study presents a facile, cost-effective and highly efficient method to rapidly remove Ni(II) from wastewater using a calcined Mg/Al layered double hydroxide (LDH), which is a pioneering investigation of using the calcined LDH to remove the positively charged Ni(II) ions. The kinetic studies showed that the removal of Ni(II) was very rapid with a pseudo first order k of up to 3.6 AE 0.5 h À1 , and maximum removal of Ni(II) was up to 204.2 AE 10.6 mg g À1 . In addition, our results reveal that both humic (HA) and fulvic acids (FA) can strongly bind to the surface of the LDH, which demonstrates that the calcined LDH can effectively remove both cationic and anionic pollutants in a single process. With the increase of pH up to 7.5, the removal of Ni, HA and FA by the calcined LDH are all drastically enhanced. Our study also demonstrated a strong synergetic effect of FA and HA on the Ni(II) removal by the calcined LDH, with a maximum Ni(II) removal of 290.6 AE 16.4 mg g À1 and 480.4 AE 21.3 mg g À1 at pH 7, respectively. The possible mechanism of the Ni(II) removal can be due to the incorporation of Ni into the layered structure by replacing the

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“…LDHs have a wide range of applications in many fields, e.g., as catalysts or catalyst precursors, ion exchangers, adsorbents for environmental contaminants, and substrates for the immobilization of biological material [1][2][3][4][5][6][7][8][9][10][11][12][13][14]. Thermal decomposition of the LDH at high temperature leads to the formation of mixed metal oxide (MMO) materials composed of spinel-like (M Ⅱ M Ⅲ 2 O 4 ) phases and other metal oxide phases (M Ⅱ O) and previous studies have shown that such materials can be used as catalysts and catalyst supports, sensors, and Li-ion battery electrodes [15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Exchange-biased NiFe2O4/NiO nanocomposites derived from NiFe-layered double hydroxides as a single precursor

Zhao

Wang

et al. 2010

Nano Res.

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NiFe 2 O 4 nanoparticles (<10 nm) embedded in a NiO matrix have been fabricated by calcining the corresponding Ni Ⅱ Fe Ⅲ -layered double hydroxide (LDH) precursors at high temperature (500 °C ). Compared with the NiFe 2 O 4 /NiO nanocomposite obtained by calcination of a precursor prepared by a traditional chemical coprecipitation method, those derived from NiFe-LDH precursors show much higher blocking temperatures (T B ) (~380 K). The enhanced magnetic stability can be ascribed to the much stronger interfacial interaction between NiFe 2 O 4 and NiO phases due to the topotactic nature of the transformation of the LDH precursor to the NiFe 2 O 4 /NiO composite material. Through tuning the Ni Ⅱ /Fe Ⅲ molar ratio of the NiFe-LDH precursor, the NiFe 2 O 4 concentration can be precisely controlled, and the T B value as well as the magnetic properties of the final material can also be regulated. This work represents a successful example of the fabrication of ferro(ferri)magnetic (FM)/antiferrimagnetic (AFM) systems with high magnetic stability from LDH precursors. This method is general and may be readily extended to other FM/AFM systems due to the wide range of available LDH precursors.

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Uptake of chloride ion from aqueous solution by calcined layered double hydroxides: Equilibrium and kinetic studies

Cited by 216 publications

References 32 publications

Evaluation of Adsorption Capacity of Methylene Blue in Aqueous Medium by Two Adsorbents: The Raw Hull of <i>Lophira Lanceolata</i> and Its Activated Carbon

Evaluation of Adsorption Capacity of Methylene Blue in Aqueous Medium by Two Adsorbents: The Raw Hull of <i>Lophira Lanceolata</i> and Its Activated Carbon

Synergistic effect of humic and fulvic acids on Ni removal by the calcined Mg/Al layered double hydroxide

Exchange-biased NiFe2O4/NiO nanocomposites derived from NiFe-layered double hydroxides as a single precursor

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Uptake of chloride ion from aqueous solution by calcined layered double hydroxides: Equilibrium and kinetic studies

Cited by 216 publications

References 32 publications

Evaluation of Adsorption Capacity of Methylene Blue in Aqueous Medium by Two Adsorbents: The Raw Hull of &lt;i&gt;Lophira Lanceolata&lt;/i&gt; and Its Activated Carbon

Evaluation of Adsorption Capacity of Methylene Blue in Aqueous Medium by Two Adsorbents: The Raw Hull of &lt;i&gt;Lophira Lanceolata&lt;/i&gt; and Its Activated Carbon

Synergistic effect of humic and fulvic acids on Ni removal by the calcined Mg/Al layered double hydroxide

Exchange-biased NiFe2O4/NiO nanocomposites derived from NiFe-layered double hydroxides as a single precursor

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Evaluation of Adsorption Capacity of Methylene Blue in Aqueous Medium by Two Adsorbents: The Raw Hull of <i>Lophira Lanceolata</i> and Its Activated Carbon

Evaluation of Adsorption Capacity of Methylene Blue in Aqueous Medium by Two Adsorbents: The Raw Hull of <i>Lophira Lanceolata</i> and Its Activated Carbon