Efficient removal of Cr(VI) by magnetically separable CoFe2O4/activated carbon composite

Qiu, Wenmei; Yang, Daoguo; Xu, Jingcai; Hong, Bo; Jin, Hongxiao; Jin, Dingfeng; Peng, Xiaoling; Li, Jing; Ge, Hongliang; Wang, Xinqing

doi:10.1016/j.jallcom.2016.03.304

Cited by 72 publications

(21 citation statements)

References 26 publications

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“…Furthermore, the obtained values of Δ H ° and Δ S ° are positive, which confirms that the adsorption of Cr(VI) is an endothermic reaction and the molecular distribution tends to be disordered . The above arguments demonstrate that the adsorption of Cr(VI) is an endothermic and spontaneous process …”

Section: Resultsmentioning

confidence: 74%

Improved Removal of Cr(VI) using Fe₃O₄/C Magnetic Nanocomposites Derived from Potassium Fulvic Acid

Lin

Tian

et al. 2019

ChemistrySelect

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The development of high performance magnetic nanomaterials has a good application prospect in wastewater treatment. Herein, Fe3O4/C nanocomposites was synthesized by eco‐friendly hydrolysis‐calcination method using potassium fulvic acid (FA−K) and FeCl3⋅6H2O as raw materials. The morphology of Fe3O4/C nanocomposites exhibited a loose pore structure with uniform size (a diameter ∼ 27 nm). The prepared Fe3O4/C nanocomposites possessed excellent dispersibility and magnetic properties in aqueous solution. The removal efficiency and maximum adsorption capacity of Fe3O4/C nanocomposites were 98% and 64.0 mg g−1, respectively. Moreover, it was confirmed that the adsorption mechanism of Cr(VI) contains electrostatic attraction and redox reaction. In this work, we provide a convenient means for manufacturing Fe3O4/C nanocomposites, and prove that FA−K is a cheap carbon source for manufacturing Fe3O4/C nanocomposites, which makes Fe3O4/C nanocomposites have potential application value in the effective adsorption of Cr(VI).

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Section: Resultsmentioning

confidence: 74%

Improved Removal of Cr(VI) using Fe₃O₄/C Magnetic Nanocomposites Derived from Potassium Fulvic Acid

Lin

Tian

et al. 2019

ChemistrySelect

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“…The result suggests that the removal of Cr(VI) was accompanied by the consumption of H + ions. Figure 1( [5][6]. The extent of protonation of the surface of the carbon layer decreased with increasing solution pH, vice versa.…”

Section: A Effect Of Initial Phmentioning

confidence: 95%

Adsorption of Chromium from Aqueous Solution Using Activated Carbon Coated Sand

Huang¹,

Liu²

2017

Proceedings of the 2nd 2016 International Conference on Sustainable Development (ICSD 2016)

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“…However, removal of heavy metals from aqueous solutions by using adsorption method with low-cost adsorbents might be both economic and effective [9]. For the removal of Cr(VI), very little costly organic waste materials such as agricultural and industrial wastes [10][11][12], natural clays [4,13,14] and activated carbon [15] and the composites of these natural adsorbents can be used. In recent years, the researchers have tried various composite production methods in order to activate the adsorbents.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Application of Glutaraldehyde Cross-Linked Chitosan Coated Bentonite Clay Capsules: Chromium(vi) Removal From Aqueous Solution

Altun

2020

J. Chil. Chem. Soc.

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New sources in literature have explained that more efficient biosorbents can be developed from natural adsorbents. One of the methods to make these natural adsorbents more efficient is preparation of composites. Hydroxyl (-OH) and amino (-NH2) groups within the structure of chitosan leads adsorbents to have a binding potential with heavy metals. In this study, a composite adsorbent made of chitosan and bentonite clay was prepared. Bentonite clay and chitosan-coated Bentonite clay composite capsules (BC) were characterized in terms of FTIR and SEM analysis. (BC) composite adsorbent was used for the adsorption of Cr(VI) ions from aqueous solution. The effects of some parameters such as pH, adsorbent dosage, adsorbate concentration, temperature and contact time on the adsorption of Cr(VI) on BC were investigated with batch studies. In order to evaluate the experimental data, Langmuir, Freundlich, Scatchard and Dubinin-Radushkevich (D-R) adsorption isotherm models were used for the analysis of adsorption equilibrium. The adsorption process was well fitted to Scatchard adsorption isotherm. While bentonite clay had 11,076 mg/g maximum adsorption capacity, BC composite had 106.444 mg/g maximum adsorption capacity for the removal of Cr(VI) ions (25 C, pH 2, contact time 60 minutes). It was concluded that chitosan-bentonite composite adsorbent can be effectively used for the removal of Cr(VI).

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Efficient removal of Cr(VI) by magnetically separable CoFe2O4/activated carbon composite

Cited by 72 publications

References 26 publications

Improved Removal of Cr(VI) using Fe₃O₄/C Magnetic Nanocomposites Derived from Potassium Fulvic Acid

Improved Removal of Cr(VI) using Fe₃O₄/C Magnetic Nanocomposites Derived from Potassium Fulvic Acid

Adsorption of Chromium from Aqueous Solution Using Activated Carbon Coated Sand

Preparation and Application of Glutaraldehyde Cross-Linked Chitosan Coated Bentonite Clay Capsules: Chromium(vi) Removal From Aqueous Solution

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Efficient removal of Cr(VI) by magnetically separable CoFe2O4/activated carbon composite

Cited by 72 publications

References 26 publications

Improved Removal of Cr(VI) using Fe3O4/C Magnetic Nanocomposites Derived from Potassium Fulvic Acid

Improved Removal of Cr(VI) using Fe3O4/C Magnetic Nanocomposites Derived from Potassium Fulvic Acid

Adsorption of Chromium from Aqueous Solution Using Activated Carbon Coated Sand

Preparation and Application of Glutaraldehyde Cross-Linked Chitosan Coated Bentonite Clay Capsules: Chromium(vi) Removal From Aqueous Solution

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Product

Resources

About

Improved Removal of Cr(VI) using Fe₃O₄/C Magnetic Nanocomposites Derived from Potassium Fulvic Acid

Improved Removal of Cr(VI) using Fe₃O₄/C Magnetic Nanocomposites Derived from Potassium Fulvic Acid