Magnetically separable CoFe2O4/CoxFey/activated carbon composites for Cd(II) removal from wastewater

Xu, Jingcai; Hong, Bo; Jin, Hongxiao; Jin, Dingfeng; Peng, Xiaoling; Wang, Xinqing

doi:10.1002/aoc.3662

Cited by 6 publications

(2 citation statements)

References 38 publications

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“…The absorption band at 457 cm −1 corresponds to the Si–O–Si groups of the tetrahedral sheets, and 1008 and 1360 cm −1 are attributed to the Si–O stretching vibration. The adsorption peaks at 540 and 450 cm −1 are assigned to tetrahedral metal stretching (Fe–O) and octahedral metal stretching (Co–O) and indicate the spinel ferrite structure form (Figure 2b) [24]. The adsorption peak at approximately 3500 cm −1 associated with the stretching vibration of O–H appears in the above three samples [25].…”

Section: Resultsmentioning

confidence: 99%

Preparation of Attapulgite/CoFe2O4 Magnetic Composites for Efficient Adsorption of Tannic Acid from Aqueous Solution

Liu

Yao

Song

et al. 2019

IJERPH

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The use of attapulgite (ATP)-based materials for adsorption of pollutants from water and wastewater has received growing attention. However, recovering ATP-based adsorbents remains a challenge. In this study, a magnetic adsorbent ATP/CoFe2O4 with high tannic acid (TA) adsorptive capacity was fabricated via a facile co-precipitation approach and was well characterized. The loaded CoFe2O4 particles were embedded into the adsorbent surfaces to allow magnetic separability. For this material, its TA adsorption kinetics, isotherm behavior, and magnetic separation efficiency are reported. The developed magnetic composites had rapid sorption kinetics of 3 h, high sorption capacity of 109.36 mg/g, and good magnetic separation efficiency of 80%. The used ATP/CoFe2O4 was successfully regenerated by NaOH and reused five times without a substantial reduction in TA removal and magnetic performance. Intermolecular hydrogen bonding formation and surface complexation were identified as the sorption mechanisms of TA by ATP/CoFe2O4.

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Section: Resultsmentioning

confidence: 99%

Preparation of Attapulgite/CoFe2O4 Magnetic Composites for Efficient Adsorption of Tannic Acid from Aqueous Solution

Liu

Yao

Song

et al. 2019

IJERPH

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“…Accumulation of toxic heavy metal ions such as Pb(II), Cd(II) and Cr(III) in soft tissues of animals or human body even at trace levels is a great concern as they are not metabolized and may cause serious hurt and even cancer. Therefore, determination of heavy metal ions in biological fluid due to their toxicity has great interest in analytical chemistry to ensure the quality of human health …”

Section: Introductionmentioning

confidence: 99%

Nitrogen doped nano porous graphene as a sorbent for separation and preconcentration trace amounts of Pb, Cd and Cr by Ultrasonic assisted in‐syringe dispersive micro solid phase extraction

Lotfi

Mousavi

Sajjadi

2017

Applied Organom Chemis

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Nitrogen doped nano porous graphene was used as an efficient sorbent in solid‐phase extraction process for simultaneous separation and pre‐concentration of metal ions lead (II), cadmium(II), and chromium(III)) in biological samples. Ultrasonic assisted in‐syringe dispersive micro solid phase extraction coupled with micro sampling atomic absorption spectrometry was utilized for the determination of metal ions. Nitrogen doped nano porous graphene was synthesized as a nano sorbent by chemical vapour deposition method. Methane and aniline were used as carbon and nitrogen sources. The characterization of sorbent was performed by field emission scanning electron microscope, transmission electron microscopy, atomic force microscope, fourier transform infrared, chemical element analysis and raman analysis. Effective parameters on the extraction efficiency such as pH, sorbent dosage, eluent volume and eluent concentration were optimized by central composite design and desirability function. Experimental results indicate that the optimal conditions for this extraction were pH = 6.4, 1.42 mg of sorbent, 100 μL of eluent, and 0.84 mol L‐1 of eluent concentration. The detection limits are as low as 1.5, 0.3 and 0.9 μg L‐1 for lead, cadmium, and chromium, respectively. The intra‐day precisions were 3.6, 4.38 and 2.94 and Inter‐day precision were 4.83, 5.26 and 4.52 for lead, cadmium, and chromium, respectively. Method performance was investigated by determination of mentioned heavy metals in complicated biological matrixes such as human plasma, urine and saliva samples with good recoveries.

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Green and simple method for preparing iron oxide nanoparticles supported on mesoporous biochar as a Fenton catalyst

Fan

et al. 2020

Applied Organom Chemis

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With the on‐going development of nanotechnology, iron‐containing nanomaterials have received much attention in wastewater treatment and site remediation. Here, we synthesized a biochar‐supported iron oxide nanocomposite (FemOn/BC) by simply pyrolysing rice root, which is a natural source both of iron and carbon. The FemOn/BC nanocomposite nicely preserved the vascular bundle structure of rice root. With iron oxide doped on the mesoporous biocarbon, the composite has the usability as a Fenton‐like catalyst in the Fenton system. FemOn/BC‐700 (pyrolysis at 700 °C) was selected to catalysis the reactive brilliant red X‐3B degradation. Under the same catalytic effect, the service life of FemOn/BC‐700 almost doubles that of iron microparticles. We believe this green and energy‐efficient method might have value in biomass usage and helps sustainable development.

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Magnetically separable CoFe₂O₄/Co_xFe_y/activated carbon composites for Cd(II) removal from wastewater

Cited by 6 publications

References 38 publications

Preparation of Attapulgite/CoFe2O4 Magnetic Composites for Efficient Adsorption of Tannic Acid from Aqueous Solution

Preparation of Attapulgite/CoFe2O4 Magnetic Composites for Efficient Adsorption of Tannic Acid from Aqueous Solution

Nitrogen doped nano porous graphene as a sorbent for separation and preconcentration trace amounts of Pb, Cd and Cr by Ultrasonic assisted in‐syringe dispersive micro solid phase extraction

Green and simple method for preparing iron oxide nanoparticles supported on mesoporous biochar as a Fenton catalyst

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