Organic dye removal from aqueous solutions by hierarchical calcined Ni-Fe layered double hydroxide: Isotherm, kinetic and mechanism studies

Lei, Chunsheng; Pi, Meng; Kuang, Panyong; Guo, Yuhong; Zhang, Fenge

doi:10.1016/j.jcis.2017.02.025

Cited by 134 publications

(28 citation statements)

References 63 publications

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“…In general, higher temperature will increase the thermal energy of the adsorbate, thus resulting in improved adsorption capacity. Furthermore, the Langmuir and Freundlich models are applied to investigate the adsorption mechanism of MB by S‐Fe 3 O 4 /poly(DA + KH550) adsorbent, as shown by the following two equations:

C_{normale} / q_{normale} = 1 / (K_{normalL} q_{normalm}) + C_{normale} / q_{normalm}

\ln q_{normale} = \ln K_{normalF} + (1 / n) \ln C_{normale}

…”

Section: Resultsmentioning

confidence: 99%

“…Furthermore, as the temperature increases from 25 to 45 °C, the maximum adsorption capacity of MB increases from 280.90 to 400.00 mg g −1 (Table S2). A dimensionless constant R L is used to express the Langmuir isotherm, as shown by the following equation:

R_{normalL} = 1 / (1 + K_{normalL} C_{0})

where C 0 and K L are the initial MB concentration and Langmuir adsorption equilibrium constant respectively. It is clear from Table S2 that the calculated R L values are 0.024–0.055, exhibiting favorable adsorption between S‐Fe 3 O 4 /poly(DA + KH550) adsorbent and MB according to the theory .…”

Section: Resultsmentioning

confidence: 99%

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Hierarchical Fe₃O₄‐derived organic/inorganic hybrids constructed by modified bio‐inspired functionalization: efficient adsorbents for water‐soluble methylene blue and mechanism

Zhan

Zhao

Wan

et al. 2019

J of Chemical Tech & Biotech

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Background The development of efficient and sustainable adsorbents is still a challenge for dye removal in practical applications. Here a method to prepare hierarchical Fe3O4‐derived organic/inorganic hybrid adsorbents for methylene blue removal is demonstrated. Typically, two different structured magnetic nanoparticles were synthesized through solvothermal route and chemical co‐precipitation (named as S‐Fe3O4 and C‐Fe3O4 respectively), which were further functionalized by a novel modified mussel‐inspired method with dopamine (DA) and (3‐aminopropyl)triethoxysilane (KH550), thus obtaining core‐shell Fe3O4/poly(DA + KH550) adsorbents. Results The effects of microstructure, morphology and surface functionalization on the adsorption performance of core‐shell Fe3O4 adsorbents were systematically investigated, thus achieving target structurally optimized core‐shell Fe3O4 adsorbents. Especially, the maximum adsorption capacity of core‐shell S‐Fe3O4/poly(DA + KH550) adsorbent reached 400.00 mg g−1 because of high specific surface area and abundant active adsorption sites. In addition, the adsorption kinetics and adsorption isotherm fitted a pseudo‐second‐order model and Langmuir model respectively. Conclusion The recycling process of adsorbent is sustainable in economy and energy by applying an external permanent magnet. In summary, the high adsorption capacity, easy separation and excellent reusability of S‐Fe3O4/poly(DA + KH550) core‐shell adsorbents make them promising for dye effluent removal. © 2019 Society of Chemical Industry

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C_{normale} / q_{normale} = 1 / (K_{normalL} q_{normalm}) + C_{normale} / q_{normalm}

\ln q_{normale} = \ln K_{normalF} + (1 / n) \ln C_{normale}

…”

Section: Resultsmentioning

confidence: 99%

R_{normalL} = 1 / (1 + K_{normalL} C_{0})

Section: Resultsmentioning

confidence: 99%

Hierarchical Fe₃O₄‐derived organic/inorganic hybrids constructed by modified bio‐inspired functionalization: efficient adsorbents for water‐soluble methylene blue and mechanism

Zhan

Zhao

Wan

et al. 2019

J of Chemical Tech & Biotech

View full text Add to dashboard Cite

show abstract

“…The intra‐particle diffusion and Elovich models were also plotted in order to verify the influence of mass transfer resistance on the binding of dyes to the CuS‐NPs‐AC. The equations are given as follows:…”

Section: Resultsmentioning

confidence: 99%

Synthesis of CuS nanoparticles loaded on activated carbon composite for ultrasound‐assisted adsorption removal of dye pollutants: Process optimization using CCD‐RSM, equilibrium and kinetic studies

Dastkhoon

Ghaedi

Asfaram

et al. 2018

Applied Organom Chemis

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In this study, the CuS nanoparticles loaded on activated carbon (CuS-NPs-AC) composite was synthesized and then, characterized by XRD and FE-SEM analyses. The prepared composite was used as a potential adsorbent for the simultaneous ultrasound-assisted removal of Indigo Carmine (IC) and Safranin-O (SO). The CuS-NPs-AC dose (0.01-0.03 g), sonication time (1-5 min), initial SO concentration (5-15 mg L -1 ) and initial IC concentration (5-15 mg L -1 ) as expectable effective parameters were studied by central composite design (CCD) under response surface methodology (RSM) to obtain an useful knowledge about the effect of simultaneous interaction between IC and SO on their removal percentage. The optimum SO and IC removal percentages were determined to be 98.24 and 97.15% at pH = 6, 0.03 g of the CuS-NPs-AC, 3 min sonication time, 12 and 10 mg L -1 of IC and SO. The values of coefficient of determination (R 2 ) for SO and IC were 0.9608 and 0.9796, respectively, indicating the favorable fitness of the experimental data to the second order polynomial regression model. The isotherm data were well correlated with Freundlich model. The maximum monolayer adsorption capacities of 87.5 and 69.90 mg g -1 at room temperature for IC and SO in the investigated binary system expressed the high efficiency of the novel adsorbent for water cleanup within a short time. The investigation of correlation between time and rate of adsorption revealed that IC and SO adsorption onto the CuS-NPs-AC followed pseudo-second-order and intra-particle diffusion simultaneously.

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“…Wide application of dyes is proportional with entrance of huge content of dyes to aqueous system and subsequently the cleaning of wastewater from color dyestuff becomes environmentally important. Synthetic aromatic dyes are biologically non‐degradable and their treatment by other conventional procedure is low efficiency hard task . Dyes and pigments in the presence of sunlight lead to decrease in the penetration of light into water which supply best quality water.…”

Section: Introductionmentioning

confidence: 99%

“…Synthetic aromatic dyes are biologically non-degradable and their treatment by other conventional procedure is low efficiency hard task. [3,4] Dyes and pigments in the presence of sunlight lead to decrease in the penetration of light into water which supply best quality water. In addition, dyes contain toxic compounds such as benzene, xanthene and aromatic amines are potentially hazardous to living organisms.…”

Section: Introductionmentioning

confidence: 99%

Highly efficient adsorption of Naphthol Green B and Phenol Red dye by Combination of Ultrasound wave and Copper‐Doped Zinc Sulfide Nanoparticles Loaded on Pistachio‐Nut Shell

Masoudian

Rajabi

Ghaedi

et al. 2018

Applied Organom Chemis

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The simultaneous and competitive ultrasound‐assisted removal of naphthol green B (NG‐B) and phenol red (PH‐R) dye from aqueous solutions were rapidly performed onto copper‐doped zinc sulfide nanoparticles loaded on pistachio‐nut shell activated carbon (Zn‐S: Cu‐NPs‐PAC). Novel adsorbent was recognized by FT‐IR, EDX, SEM and particle size distribution techniques. First, the effect of pH on the removal efficiency was optimized by one‐at‐a‐time procedure and subsequently dependency of dyes removal in their binary situation to variables such as sonication time, initial dyes concentrations and adsorbent dosage was fully investigated and optimized by central composite design (CCD) under response surface methodology (RSM) as well as by regarding desirability function (DF). The good agreement between experimental and predicted values supports suitability of the present model for well definition adsorption state. The ultrasound strongly enhanced mass transfer and performance, while 0.035 g of adsorbent is sufficient and capable to remove high percentage (>99.0%) of dyes in the rapid time (6 min). The experimental equilibrium data represented by Langmuir at mild conditions for successful removal of high adsorption capacity in binary system (196 mg g−1 for PH‐R, 76 mg g−1 for NG‐ B). Kinetics evaluation of experiments at various time intervals reveals applicability of pseudo‐second‐ order models for description of adsorption processes.

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Organic dye removal from aqueous solutions by hierarchical calcined Ni-Fe layered double hydroxide: Isotherm, kinetic and mechanism studies

Cited by 134 publications

References 63 publications

Hierarchical Fe₃O₄‐derived organic/inorganic hybrids constructed by modified bio‐inspired functionalization: efficient adsorbents for water‐soluble methylene blue and mechanism

Hierarchical Fe₃O₄‐derived organic/inorganic hybrids constructed by modified bio‐inspired functionalization: efficient adsorbents for water‐soluble methylene blue and mechanism

Synthesis of CuS nanoparticles loaded on activated carbon composite for ultrasound‐assisted adsorption removal of dye pollutants: Process optimization using CCD‐RSM, equilibrium and kinetic studies

Highly efficient adsorption of Naphthol Green B and Phenol Red dye by Combination of Ultrasound wave and Copper‐Doped Zinc Sulfide Nanoparticles Loaded on Pistachio‐Nut Shell

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Organic dye removal from aqueous solutions by hierarchical calcined Ni-Fe layered double hydroxide: Isotherm, kinetic and mechanism studies

Cited by 134 publications

References 63 publications

Hierarchical Fe3O4‐derived organic/inorganic hybrids constructed by modified bio‐inspired functionalization: efficient adsorbents for water‐soluble methylene blue and mechanism

Hierarchical Fe3O4‐derived organic/inorganic hybrids constructed by modified bio‐inspired functionalization: efficient adsorbents for water‐soluble methylene blue and mechanism

Synthesis of CuS nanoparticles loaded on activated carbon composite for ultrasound‐assisted adsorption removal of dye pollutants: Process optimization using CCD‐RSM, equilibrium and kinetic studies

Highly efficient adsorption of Naphthol Green B and Phenol Red dye by Combination of Ultrasound wave and Copper‐Doped Zinc Sulfide Nanoparticles Loaded on Pistachio‐Nut Shell

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Hierarchical Fe₃O₄‐derived organic/inorganic hybrids constructed by modified bio‐inspired functionalization: efficient adsorbents for water‐soluble methylene blue and mechanism

Hierarchical Fe₃O₄‐derived organic/inorganic hybrids constructed by modified bio‐inspired functionalization: efficient adsorbents for water‐soluble methylene blue and mechanism