Adsorptive removal of Congo red, a carcinogenic textile dye, from aqueous solutions by maghemite nanoparticles

Afkhami, Abbas; Moosavi, Razieh

doi:10.1016/j.jhazmat.2009.09.066

Cited by 604 publications

(261 citation statements)

References 47 publications

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“…This is due to at higher pH, the adsorbents surface become negatively charged. Therefore the adsorbents did not favour the adsorption of negatively charged CR dye due to electrostatic repulsion (Afkhami and Moosavi 2010).…”

Section: Effect Of Ph On Cr Solutionmentioning

confidence: 97%

Ferrous oxalate, maghemite and hematite nanorods as efficient adsorbents for decontamination of Congo red dye from aqueous system

Dhal

Mishra

Hota

2014

Int. J. Environ. Sci. Technol.

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In this present study, we have synthesized ferrous oxalate nanorods by a modified co-precipitation methods. The obtained nanomaterial (ferrous oxalate nanorod) was calcined at higher temperatures to form both maghemite and hematite nanorods. The morphology, size, crystalline phases, formation and surface area of the nanorods were characterized by scanning electron microscope, transmission electron microscope, X-ray diffraction, Fourier transform infrared spectroscope, ultraviolet-visible diffuse reflectance spectroscope and Brunauer-Emmett-Teller surface area analytical techniques. The results showed that high-yield aligned nanorods with a typical diameter of 100-200 nm and length up to micrometers were formed. The obtained rod-shaped nanomaterials (i.e., ferrous oxalate, maghemite and hematite) were used as adsorbents and were applied to remove Congo red (CR) dye molecules, which was used as a model of organic pollutants in aqueous solution. The adsorption isotherms and kinetics of removal of CR were studied. It was found that the adsorption capacity of maghemite nanorod is highest among the three adsorbents and can be regarded as an effective adsorbent for removal of CR from aqueous solution.

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Section: Effect Of Ph On Cr Solutionmentioning

confidence: 97%

Ferrous oxalate, maghemite and hematite nanorods as efficient adsorbents for decontamination of Congo red dye from aqueous system

Dhal

Mishra

Hota

2014

Int. J. Environ. Sci. Technol.

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“…The sum of the absolute error (SAE) is given as [34]: (9) The isotherm data evaluated by this technique is the most fitted as the magnitude of the errors increase, influencing the fit through the high concentration data.…”

Section: The Sum Of the Absolute Errors (Sae)mentioning

confidence: 99%

“…Lately, magnetic segregation process has been satisfactorily used owing to economical cost, homogeneity and being rapid in the separation process. In view of this, diverse adsorbents like ion exchange resins, zeolites, activated carbon, polymeric adsorbent, wastes and nanoparticles have been magnetized [7,8] [9,10]. Owing to their chemical stability, biocompatibility and heating ability, ferrofluids of maghemite nanoparticles can be applied for ferrofluids hyperthermia in tumor treatments [11].…”

Section: Introductionmentioning

confidence: 99%

Insights onto the Adsorption of MFe2O4 Nanoparticles Loaded onto Activated Carbon

Attia¹,

Shouman

El-Khouly

2017

Egypt. J. Chem.

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I N THIS WORK, magnetic nanoparticles of MFe 2 O 4 (M: Fe, Mn, Cu and Co) were prepared on the surface of granular activated carbon throughout the impregnation process, employing HNO 3 acid as the carbon modifying agent. These adsorbents were employed to assess the adsorption capability of p-chlorophenol from aqueous solution. The adsorbents were characterized by XRD, SEM, EDX and nitrogen adsorption isotherms. Additionally, the impact of various parameters such as pH, contact time was investigated. The results demonstrate that the current phase is mainly γ-Fe 2 O 3 (maghemite), spinel manganese, copper and cobalt ferrite, respectively. The equilibrium details were best ascribed by the Langmuir model accompanied by high adsorption capacity of 110mg/g for γ-Fe 2 O 3 / activated carbon. The kinetic experimental analysis of the adsorption model perfectly was correlated to the pseudo -second order kinetics. With the advantages inexpensive and fast processing, these adsorbents could attain promoting application in wastewater treating.

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“…However, the basic disadvantage of these adsorbents is the lack of selectivity in the removal of metal ions, which leads to other species interfering with the target metal ions (15). To overcome this problem, chemical or physical modification of the adsorbent surface with some organic compounds, especially chelating ones, is usually used to load the surface with some donor atoms such as oxygen, sulfur, nitrogen, and phosphorus (16).…”

Section: Introductionmentioning

confidence: 99%

Synthesis of DNPH/SDS/Fe3O4 Nanoparticles for Removal of Cr (VI) Ions From Aqueous Solution

Sobhanardakani¹,

Zandipak²,

Cheraghi³

2016

Avicenna J Environ Health Eng

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In this study, sodium dodecyl sulfate (SDS) coated magnetite modified with 2, 4-Dinitrophenylhydrazine was used to remove Cr (VI) ions from aqueous solution. The modified magnetite nanoparticles were characterized by X-ray diffraction (XRD) analysis, Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), and SEM-EDXS measurement. The synthesized nanoparticles exhibited a high surface area of 75.5 m 2 g -1 and were of 20 -35 nm in particle size. The effects of parameters, including pH, dose of adsorbent, temperature and contact time were investigated to find the optimum adsorption conditions. Adsorption data fits well with the Langmuir isotherm model with a maximum adsorption capacity (qm) and a Langmuir adsorption equilibrium constant (b) of 169.5 mg g -1 and 0.168 L mg -1 , respectively. The adsorption kinetic agrees well with pseudo-second-order model.

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Adsorptive removal of Congo red, a carcinogenic textile dye, from aqueous solutions by maghemite nanoparticles

Cited by 604 publications

References 47 publications

Ferrous oxalate, maghemite and hematite nanorods as efficient adsorbents for decontamination of Congo red dye from aqueous system

Ferrous oxalate, maghemite and hematite nanorods as efficient adsorbents for decontamination of Congo red dye from aqueous system

Insights onto the Adsorption of MFe2O4 Nanoparticles Loaded onto Activated Carbon

Synthesis of DNPH/SDS/Fe3O4 Nanoparticles for Removal of Cr (VI) Ions From Aqueous Solution

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