Iron oxide/hydroxide (α,γ-FeOOH) nanoparticles as high potential adsorbents for lead removal from polluted aquatic media

Rahimi, Safoora; Moattari, Rozita M.; Rajabi, Laleh; Derakhshan, Ali Ashraf; Keyhani, Mohammad

doi:10.1016/j.jiec.2014.07.039

Cited by 147 publications

(59 citation statements)

References 40 publications

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“…The adsorption capacity of each dye on the various adsorbents was calculated using Eq. 2 (Macedo et al 2006;Bhatt et al 2012;Rahimi et al 2015;Ruziwa et al 2015):…”

Section: Adsorption Isothermsmentioning

confidence: 99%

Synthesis, characterisation and methyl orange adsorption capacity of ferric oxide–biochar nano-composites derived from pulp and paper sludge

2016

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A Fe 2 O 3-biochar nano-composite (Fe 2 O 3-BC) was prepared from FeCl 3-impregnated pulp and paper sludge (PPS) by pyrolysis at 750°C. The characteristics and methyl orange (MO) adsorption capacity of Fe 2 O 3-BC were compared to that of unactivated biochar (BC). X-ray diffraction (XRD) and scanning electron microscopy (SEM) confirmed the composite material was nano-sized. Fourier transform infrared (FTIR) spectroscopy revealed the presence of hydroxyl and aromatic groups on BC and on Fe 2 O 3-BC, but Brunauer-Emmett-Teller (BET) surface area and Barrett-Joyner-Halenda (BJH) porosity were lower for Fe 2 O 3-BC than BC. Despite the lower BET surface area and porosity of Fe 2 O 3-BC, its MO adsorption capacity was 52.79 % higher than that of BC. The equilibrium adsorption data were best represented by the Freundlich model with a maximum adsorption capacity of 20.53 mg g-1 at pH 8 and 30 min contact time. MO adsorption obeyed pseudo-second-order kinetics for both BC and Fe 2 O 3-BC with R 2 values of 0.996 and 0.999, respectively. Higher MO adsorption capacity for Fe 2 O 3-BC was attributed to the hybrid nature of the nano-composites; adsorption occurred on both biochar matrix and Fe 2 O 3 nanocrystals. Gibbs free energy calculations confirmed the adsorption is energetically favourable and spontaneous with a high preference for adsorption on both adsorbents. The nano-composite can be used for the efficient removal of MO ([97 %) from contaminated wastewater.

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“…The adsorption capacity of each dye on the various adsorbents was calculated using Eq. 2 (Macedo et al 2006;Bhatt et al 2012;Rahimi et al 2015;Ruziwa et al 2015):…”

Section: Adsorption Isothermsmentioning

confidence: 99%

Synthesis, characterisation and methyl orange adsorption capacity of ferric oxide–biochar nano-composites derived from pulp and paper sludge

2016

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“…Pseudo-second-order model two peaks between 1167 and 1093 cm À1 are the in-plane bending vibrations of FeÀ ÀOH [11]. After adsorption, in curve (b) of Fig.…”

Section: Pseudo-first-order Modelmentioning

confidence: 98%

“…Before adsorption, in curve (a), the spectrum exhibits peaks at 3421, 1631, 1381, 1167 and 1093 cm À1 , respectively. The peak at 3421 cm À1 is the stretching vibration of OÀ ÀH [13]; the adsorption peak located 1631 cm À1 is due to the water bending vibration [11]; the peak in 1381 cm À1 is the symmetric stretching vibrations of NÀ ÀO [12]; the Table 1 The values of kinetics parameters.…”

Section: Ftir Analysismentioning

confidence: 99%

Core–nanoshell magnetic composite material for adsorption of Pb(II) in wastewater

Che

Wang

et al. 2015

Journal of Environmental Chemical Engineering

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“…Goethite was synthesized from the reaction of Fe(NO 3 ) 3 ·9H 2 O and KOH [19]. The obtained suspension was sonicated for 30 minutes at room temperature and then placed in the oven for 70 minutes at 100°C and centrifuged.…”

Section: Preparation Of Goethite/chitosan Nanocompositesmentioning

confidence: 99%

Optimization of lead removal from aqueous solution using goethite/chitosan nanocomposite by response surface methodology

Rahimi

Moattari

Rajabi

et al. 2015

Colloids and Surfaces A: Physicochemical and Engineering Aspect

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Iron oxide/hydroxide (α,γ-FeOOH) nanoparticles as high potential adsorbents for lead removal from polluted aquatic media

Cited by 147 publications

References 40 publications

Synthesis, characterisation and methyl orange adsorption capacity of ferric oxide–biochar nano-composites derived from pulp and paper sludge

Synthesis, characterisation and methyl orange adsorption capacity of ferric oxide–biochar nano-composites derived from pulp and paper sludge

Core–nanoshell magnetic composite material for adsorption of Pb(II) in wastewater

Optimization of lead removal from aqueous solution using goethite/chitosan nanocomposite by response surface methodology

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