Adsorption of methylene blue onto humic acid-coated Fe3O4 nanoparticles

Zhang, Xian; Zhang, Panyue; Wu, Zhen; Zhang, Ling; Zeng, Guangming; Zhou, Chen

doi:10.1016/j.colsurfa.2012.12.056

Cited by 173 publications

(65 citation statements)

References 32 publications

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“…Immobilisation of biocompatible materials to these magnetic nanoparticles has provided a swift and safe separation of different biological molecules by utilising an external magnetic field [17] [18] [19]. Humic acid (HA), naturally originated by decomposition of mostly plant debris, is a fraction of the humic substances, which constitute around 50% -80% of the natural organic matter in ground/surface water, sediments and soils [22]. Other known fractions of humic substances are fulvic acid (FA) and humin where all these three fractions are varied in their water solubility and apparent molecular weight.…”

Section: Introductionmentioning

confidence: 99%

Fabrication and Characterisation of Novel Natural Lycopodium clavatum Sporopollenin Microcapsules Loaded In-Situ with Nano-Magnetic Humic Acid-Metal Complexes

Dyab¹,

Abdallah²,

Ahmed³

et al. 2016

JEAS

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Sporopollenin exines microcapsules, derived from the naturally occurring spores of Lycopodium clavatum, have been loaded in-situ with humic acid sodium salt-Zinc (HA-Zn) complex. The chemical treatment method utilised to prepare the sporopollenin microcapsules from raw spores was discussed and the resulted sporopollenin microcapsules were characterised using SEM, TGA and FTIR. Metal complexes of the sodium salt of humic acid and zinc ion were prepared using different protocols and in-situ loaded into the pre-treated sporopollenin microcapsules. The resulted complex was characterised before and after the encapsulation process using FTIR, TGA and XRD techniques. The morphology of the empty and loaded sporopollenin was not altered. Infrared spectroscopy revealed an increase in the absorption for COO − vibrations at 1583 and 1384 cm −1 in the FTIR spectra of HA-Zn complex compared to that of the original sodium salt of humic acid, indicative of bonding of the metal ions in hydrated form to the carboxyl or phenolic hydroxyl groups or both of the sodium humate molecules. TGA results of the HA-Zn complex loaded sporopollenin showed that around %15 of residual HA-Zn was successfully encapsulated indicative of the efficiency of the protocol used. We showed also that biodegradable magnetite nanoparticles can be surface modified with HA and encapsulated into sporopollenin. The resulted biosorbents microcapsules can be used for enhanced magnetic removal of either heavy metals or HA from different aqueous media.

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Section: Introductionmentioning

confidence: 99%

Fabrication and Characterisation of Novel Natural Lycopodium clavatum Sporopollenin Microcapsules Loaded In-Situ with Nano-Magnetic Humic Acid-Metal Complexes

Dyab¹,

Abdallah²,

Ahmed³

et al. 2016

JEAS

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“…The practical applications of adsorbents are significantly dependent to the recycling and regeneration ability (11). Such adsorbents not only have an excellent adsorption capacity but also large desorption feature which will reduce secondary pollution and the overall cost.…”

Section: Regeneration and Reuse Experimentsmentioning

confidence: 99%

“…Zhang et al studied the adsorption of methylene blue onto HA-coated Fe3O4 MNC. They reported typical superparamagnetic characteristics and great reactive activity for MB adsorption of Fe3O4@CFA MNC (11). Cao et al studied the high adsorption capacity of magnetic Fe3O4/chitosan nanoparticles and removal of brilliant red (X-3B) (12).…”

Section: Introductionmentioning

confidence: 99%

Adsorption of Acid Red 114 onto Fe3O4@Caffeic acid recycable magnetic nanocomposite

Yıldız¹

2016

Journal of the Turkish Chemical Society, Section A: Chemistry

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Abstract:In this study, the adsorption capacity of caffeic acid (CFA) functionalized Fe3O4 magnetic recyclable nanocomposite (Fe3O4@CFA MNC) for removal of industrial dye Acid Red 114 (AR 114) was investigated. The maximum adsorption (qm) of the Fe3O4@CFA MNC for AR114 was 333 mg/g without pH correction of the solution. Compared with other studies these adsorbent possess high adsorption capacity for AR114 dye. The adsorption isotherm data and the process of adsorption kinetics were fitted using the Langmuir equation and a pseudo-second-order kinetic model that showed chemisorption may be the rate controlling step in the adsorption processes. It was proved that the magnetic NMs technology was contributed by this study which can be a new and covetable alternative for organic contaminant adsorption. Furthermore, the reusability of the Fe3O4@CFA MNC was investigated and significant removal of AR114 obtained even after five cycles.

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“…This results is explained by the fact that following adsorption of first layer of charged dyes on adsorbent and formation of semi-capacitor, hinder form more layer adsorption via repulsive force among layer [43] The effect of isotherm shape has been discussed with a view to predict whether an adsorption system is favorable or unfavorable which in Langmuir isotherm represent by R L value to separation factor or equilibrium parameter. [44] The i.e., whether the process is unfavorable (R L > 1), or linear (R L = 1), or favorable (0 < R L < 1), or irreversible (R L = 0) and as results show R L values were in the range of 0 < R L < 1 (Table 4) which support high efficiency of this model for [48] Activated Carbon (walnut shells) MB 315.0 1440 [49] CuO-Nanoparticles Loaded on Activated Carbon MB 10.55 15 [50] PDA microspheres MB 90.70 100 [51] MWCNTs filled with Fe 2 O 3 particles MB 42.90 60 [52] Ag-Nanoparticles Loaded on Activated Carbon MB 71.43 15 [21] Humic Acid-coated Fe 3 O 4 -NP (HA-Fe 3 O 4 ) MB 93.08 27 [53] Activated Carbon of Thespesia Populnea Pods OG 9.120 180 [54] Bagasse Fly Ash OG 18.79 240 [10] explanation of data in single (MB and OG) and binary system (MB-OG) on the SnO 2 /(NH 4 ) 2 -SnCl 6 -NCs-AC. Freundlich parameters (K F and n) indicate whether the nature of sorption is either favorable or unfavorable and accordingly 1 < n < 10 imply favorable sorption and its value closer to 1 suggest more uniform adsorbent.…”

Section: Adsorption Isotherm Modelingmentioning

confidence: 99%

Synthesis and characterization of SnO₂/(NH₄)₂‐SnCl₆ nanocomposites loaded on activated carbon and its application for adsorption of methylene Blue and Orange G

Jalali

Rahimi

Ghaedi

et al. 2017

Applied Organom Chemis

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The present study deals with the synthesis and characterization (FE-SEM, particle size distribution, XRD and point of zero charge) SnO 2 /(NH 4 ) 2 -SnCl 6 nanocomposites loaded on activated carbon (SnO 2 /(NH 4 ) 2 -SnCl 6 -NCs-AC) and its subsequent application for the simultaneous removal of Methylene Blue (MB) and Orange G (OG) from aqueous solution. Response surface methodology (RSM) based on central composite design (CCD) give trend of influencing responses with respect to five parameters such as contact time (X 1 ), OG concentration (X 2 ), MB concentration (X 3 ), adsorbent mass (X 4 ) and pH (X 5 ). In later stage following recognition of significant variables and interaction, quadratic model generated which are able to predict the dyes removal in different conditions. Justification and selection of significant terms was conducted based on analysis of variance and Fisher's F-test Optimal value of contact time, OG concentration, MB concentration, adsorbent mass and pH were set at 4.0 min, 10 mg l −1 , 20 mg L −1 , 0.015 g and 6.0, respectively, which lead to achievement of best experiment removal percentage of 97.0 and 99.5% OG and MB respectively, from their binary solutions. The whole experimental data follow pseudo-first-order and pseudo-second-order rate equations. The fitting experimental data to more available conventional model like Langmuir, Freundlich, Temkin and Dubinin-Radushkevich isotherm models revel more ability of Langmuir model (with R 2 > 0.997) for explanation of system in equilibrium. The adsorption efficiency remained high even after the five cycle of reuse (99.76% and 95.56% for MB and OG, respectively).KEYWORDS adsorption isotherm and kinetic, experimental design, methylene blue, orange G, SnO 2 /(NH 4 ) 2 -SnCl 6 -NCs-AC, ultrasound

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Adsorption of methylene blue onto humic acid-coated Fe3O4 nanoparticles

Cited by 173 publications

References 32 publications

Fabrication and Characterisation of Novel Natural <i>Lycopodium clavatum</i> Sporopollenin Microcapsules Loaded <i>In-Situ</i> with Nano-Magnetic Humic Acid-Metal Complexes

Fabrication and Characterisation of Novel Natural <i>Lycopodium clavatum</i> Sporopollenin Microcapsules Loaded <i>In-Situ</i> with Nano-Magnetic Humic Acid-Metal Complexes

Adsorption of Acid Red 114 onto Fe3O4@Caffeic acid recycable magnetic nanocomposite

Synthesis and characterization of SnO₂/(NH₄)₂‐SnCl₆ nanocomposites loaded on activated carbon and its application for adsorption of methylene Blue and Orange G

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Adsorption of methylene blue onto humic acid-coated Fe3O4 nanoparticles

Cited by 173 publications

References 32 publications

Fabrication and Characterisation of Novel Natural &lt;i&gt;Lycopodium clavatum&lt;/i&gt; Sporopollenin Microcapsules Loaded &lt;i&gt;In-Situ&lt;/i&gt; with Nano-Magnetic Humic Acid-Metal Complexes

Fabrication and Characterisation of Novel Natural &lt;i&gt;Lycopodium clavatum&lt;/i&gt; Sporopollenin Microcapsules Loaded &lt;i&gt;In-Situ&lt;/i&gt; with Nano-Magnetic Humic Acid-Metal Complexes

Adsorption of Acid Red 114 onto Fe3O4@Caffeic acid recycable magnetic nanocomposite

Synthesis and characterization of SnO2/(NH4)2‐SnCl6 nanocomposites loaded on activated carbon and its application for adsorption of methylene Blue and Orange G

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Fabrication and Characterisation of Novel Natural <i>Lycopodium clavatum</i> Sporopollenin Microcapsules Loaded <i>In-Situ</i> with Nano-Magnetic Humic Acid-Metal Complexes

Fabrication and Characterisation of Novel Natural <i>Lycopodium clavatum</i> Sporopollenin Microcapsules Loaded <i>In-Situ</i> with Nano-Magnetic Humic Acid-Metal Complexes

Synthesis and characterization of SnO₂/(NH₄)₂‐SnCl₆ nanocomposites loaded on activated carbon and its application for adsorption of methylene Blue and Orange G