Zinc peroxide nanomaterial as an adsorbent for removal of Congo red dye from waste water

Chawla, Santa; Uppal, Himani; Yadav, Mohit; Bahadur, Nupur; Singh, Nahar

doi:10.1016/j.ecoenv.2016.09.017

Cited by 126 publications

(48 citation statements)

References 39 publications

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“…As shown from Figure 3, there is significant decrease in the %R value from 69.79% to 22.85% with increasing the MB concentration from 25 to 55 mg/L. This decrease in the percentage removal of MB could be due to the saturation the active adsorption sites of the adsorbent nanoparticles (CFC) after adsorbing a certain amount of MB dye molecules [31]. Therefore 25 mg/L was chosen as an optimum concentration for further studies.…”

Section: Effect Of the Initial Dye Concentrationmentioning

confidence: 99%

Synthesis and Characterization of Magnetic CoFe1.9Cr0.1O4 Nanoparticles by Sol-gel Method and Their Applications as an Adsorbent for Water Treatment

Amar¹,

Sharif²,

Omer³

et al. 2018

Proceedings of First Conference for Engineering Sciences and Technology: Vol. 2

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Water contamination by synthetic dyes is considered as a serious environmental issue, globally. In this study, the adsorptive removal of a very toxic cationic dye, methylene blue (MB), from aqueous solution was investigated using spinel ferrite, CoFe1.9Cr0.1O4 (CFC), magnetic nanoparticles as an adsorbent. CoFe1.9Cr0.1O4 powder was successfully synthesized via a sol-gel process and characterized by X-ray powder diffraction (XRD), Fourier transform infrared spectroscopy (FTIR) and scanning electron microscope (SEM) techniques. The effect of various experimental parameters on MB removal including; contact time, initial dye concentration, adsorbent dosage, solution pH and temperature were investigated. The results revealed that about 94 % of MB was removed under the optimal operational conditions. The adsorption kinetics showed that adsorption data were better described by pseudo-second-order model (PSO). In addition, the adsorption isotherms follow Langmuir isotherm model and the maximum monolayer adsorption capacity was found to be 11.41 mg/g. The calculated thermodynamic parameters (i.e., ∆G o , ∆H o , ∆S o) indicate that the proposed adsorption process of methylene blue onto CoFe1.9Cr0.1O4 nanoparticles is exothermic and spontaneous in nature. The results suggest that the synthesized magnetic nanoparticles (CFC) can be employed for the removal of toxic cationic synthetic dyes from wastewater.

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Section: Effect Of the Initial Dye Concentrationmentioning

confidence: 99%

Synthesis and Characterization of Magnetic CoFe1.9Cr0.1O4 Nanoparticles by Sol-gel Method and Their Applications as an Adsorbent for Water Treatment

Amar¹,

Sharif²,

Omer³

et al. 2018

Proceedings of First Conference for Engineering Sciences and Technology: Vol. 2

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“…synthesized ZnO 2 nanoparticles and used it for removal of Congo red. Within 10 min the adsorption capacity obtained was 208 mg g −1 . Similarly, Nekouei et al.…”

Section: Removal Of Organic Contaminants Using Nanomaterialsmentioning

confidence: 99%

Recent Progress in Nanomaterials for Adsorptive Removal of Organic Contaminants from Wastewater

2020

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Water being most vital component of life is getting contaminated due to inhuman disposal of toxicants in water bodies. Organic compounds such as dyes, pharmaceuticals/drugs, pesticides etc. are used for various purposes and become life threatening when dumped in water bodies without pre‐treatment. Removal of these toxicants from environment is complicated but highly essential for sustainable development. Various methods have been used for this purpose among which adsorption is the most simple, fast, effective and inexpensive method for the removal of such contaminants. Nanomaterial proved to be one of the best adsorbent due to its unique structural properties which provides large surface area and high adsorption capacity. The factors affecting adsorption along with adsorption mechanism is discussed in detail. Detection of the pollutants is also quite tedious work as pollutants are present in trace quantity. UV‐Visible spectrophotometry is widely used detection technique which is easy to operate, produce accurate results and cheap. The review emphasizes the use of nanomaterial as adsorbents for the removal of various organic pollutants from wastewater using UV‐Visible spectrophotometry.

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“…It is clearly seen from the figure that the %R of MB decreased significantly from 76.78% to 15.57% with as the initial MB concentration was increased from 10 to 90 mg/L, respectively. This behaviour could be due to the fact that, after the adsorption of a certain amount of MB, the available number of active sites on the CFZ surface became saturated [38]. Based on this finding, an initial MB concentration of 10 mg/L was chosen as optimum value and will be used in the subsequent experiments.…”

Section: Effect Of Solution Phmentioning

confidence: 99%

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2020

Chem. Methodol.

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In this study, Zn-substituted cobalt ferrite nanoparticles (CoFe1.9Zn0.1O4, CFZ) were successfully synthesized via a combined EDTA-citrate sol-gel process. The synthesized CoFe1.9Zn0.1O4 nanoparticles were characterized by X-ray powder diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), point zero charge (pHpzc) and scanning electron microscopy (SEM). The adsorption experiments of methylene blue (MB) onto CFZ surface were conducted in batch mode. The experiments were conducted under different conditions (contact time, adsorbent dosage, initial pH solution, solution temperature and initial dye concentration). The experimental data were better fitted to pseudo-second-order (PSO) kinetic model (R 2 =0.9990). In addition, Langmuir isotherm (R 2 =0.9906) was the best model to describe the experimental adsorption data. The maximum adsorbed amount of MB (qmax) per unit mass of adsorbent was about 27.79 mg/g. The adsorption thermodynamics (i.e., ΔG°, ΔH°, ΔS°) revealed that the proposed adsorption process is feasible, spontaneous and exothermic in nature. The obtained results suggest that CFZ is a promising material used as an adsorbent for very toxic pollutants from aqueous solutions.

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Zinc peroxide nanomaterial as an adsorbent for removal of Congo red dye from waste water

Cited by 126 publications

References 39 publications

Synthesis and Characterization of Magnetic CoFe1.9Cr0.1O4 Nanoparticles by Sol-gel Method and Their Applications as an Adsorbent for Water Treatment

Synthesis and Characterization of Magnetic CoFe1.9Cr0.1O4 Nanoparticles by Sol-gel Method and Their Applications as an Adsorbent for Water Treatment

Recent Progress in Nanomaterials for Adsorptive Removal of Organic Contaminants from Wastewater

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