Modeling and optimization of Direct Red 16 adsorption from aqueous solutions using nanocomposite of MnFe 2 O 4 /MWCNTs: RSM-CCRD model

Kafshgari, Leila Asadi; Ghorbani, Mohsen; Azizi, Asghar; Agarwal, Shilpi; Gupta, Vinod Kumar

doi:10.1016/j.molliq.2017.03.047

Cited by 56 publications

(19 citation statements)

References 61 publications

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“…Analysis tools available in the Design-Expert were employed to analyse the experimental data and fitted to the polynomial models which explains the effect of linear, two-factor interaction and quadratic over the responses. The best model is selected according to the significant model p value, insignificant lack of fit value and maximum values of adjusted and predicted R 2 values [53,54]. The model fit summary given in Tables S1 and S2 shows the results of statistical analysis of the selected models at the confidence level of 95% (p-value < 0.05).…”

Section: Development Of the Regression Modelmentioning

confidence: 99%

Process optimisation of methylene blue sequestration onto physical and chemical treated coffee husk based adsorbent

Murthy

Gowrishankar

2020

SN Appl. Sci.

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Coffee husk (CH) was physically and chemically treated with autoclaving (SCH) and NaOH (NCH) to develop low-cost adsorbent for the removal of methylene blue (MB) from synthetic wastewater, and their adsorption efficiencies were evaluated in batch mode. The prepared adsorbent was characterised by SEM, FTIR and point of zero charge. The central composite rotatable design (CCRD) was employed to optimise the adsorption process parameters such as pH, adsorbent dosage and initial MB concentration. The second-order quadratic model fitted best with the experimental adsorption data, and ANOVA results showed that the developed model was significant. The linear terms in the model significantly influence the adsorption capacity of SCH and NCH, but interaction terms were not significant. At optimised conditions, the developed adsorbents can remove > 90% of MB from the aqueous solution. Freundlich model showed a better fit with the adsorption isotherm data with R 2 greater than 0.95. Kinetics of MB adsorption onto SCH and NCH followed the pseudo-second-order model. The maximum monolayer adsorption capacity was found to be 129 and 200 mg/g for SCH and NCH, respectively. The present study showed that pretreated coffee husk waste can be used as an alternative for expensive adsorbents for the removal of dyes from wastewater.

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Section: Development Of the Regression Modelmentioning

confidence: 99%

Process optimisation of methylene blue sequestration onto physical and chemical treated coffee husk based adsorbent

Murthy

Gowrishankar

2020

SN Appl. Sci.

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“…As the chemical structure of the IC dye is complicated, so the novel, economical, low-cost adsorbents should be introduced to the industry. Recently, researchers [17,18] have attracted the vast usage of the nanomaterial because of the large specific area and high reactivity and simplicity in surface functionality.…”

Section: Introductionmentioning

confidence: 99%

Enhanced adsorptive removal of Indigo carmine dye performance by functionalized carbon nanotubes based adsorbents from aqueous solution: equilibrium, kinetic, and DFT study

2019

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The present work considers an adsorptive removal of Indigo carmine (IC) dye onto nanotube carbon (CNTs). The pure CNTs were prepared via chemical vapor deposition (CVD) method utilizing methane gas as a carbon source at 1000 °C in a quartz tube. The morphology and surface chemical structure of the adsorbents were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), nitrogen adsorption/desorption technique, and thermal gravity analysis (TGA). The parameters of the IC dye adsorption, such as initial concentration, contact time, pH, and mass-loaded adsorbent, were evaluated. The kinetic study confirmed that a pseudo-second-order model was best fitted to the adsorption data. The removal efficiency of adsorption onto pure and COOH-functionalized CNTs was 84% and 98.7% at 15 min, respectively. The equilibrium results were fitted well to the Langmuir isotherm model. The adsorption capacity of the CNT and COOH-CNT was 88.5 and 136 mg/g, respectively. The reusability of the adsorbents was studied, and after eight cycles, the efficiency decreased to 70%. Moreover, the density functional theory calculations confirmed that the functionalization of CNTs with COOH groups improves the adsorption properties of IC due to the formation of hydrogen-bonding interactions.

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“…Carbon nanotubes (CNTs), as an instance of such carbon matrices, is commonly used as templates in electrochemical and bioelectrochemical sensors, given their great surface area, electrical conductivity, the special whole structure, excellent chemical stability, and low cost . To tap into the potential advantages of both these ingredients, i. e. ferrite nanoparticles and CNTs, different modified CNTs have been decorated with nanoparticles such as CoFe 2 O 4 , NiFe 2 O 4 MnFe 2 O 4 , and ZnFe 2 O 4 . As opposed to other analytical tools, electrochemical sensors offer different advantages of simplicity, stability, reproducibility, reasonable analysis time, and costs …”

Section: Introductionmentioning

confidence: 99%

Electrochemical Sensor Based on Carbon Nanotubes Decorated with ZnFe₂O₄ Nanoparticles Incorporated Carbon Paste Electrode for Determination of Metoclopramide and Indomethacin

et al. 2019

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It was intended to design a simple, inexpensive, yet stable and selective electrochemical sensor for the analysis of metoclopramide (MCP) and Indomethacin (IND) in individual and binary mixtures there of using a carbon paste of multiwall carbon nanotubes (MWCNTs) decorated with spinel zinc ferrite nanoparticle (ZnFe 2 O 4 ) electrode i. e. ZnFe 2 O 4 /MWCNTs-CPE. The composite material and the modified carbon paste were characterized by analytical methods including Fourier transform infrared spectroscopy (FT-IR), scanning electron micro-scopy (SEM), X-ray diffraction (XRD) and energy dispersive X-ray analysis (EDX). The peak currents obtained through the differential pulse voltammetry of MCP and IND revealed a linear increasing trend from 0.6 to 90.0 μM for MCP; and from 5.0 to 200.0 μM for IND and respective detection limits of 0.13 μM and 0.5 μM, were obtained for the target species. The resulting modified CPE was successfully used for the determination of MCP in real samples.[a] M. Hassannezhad, Prof. M. R. Ganjali

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Modeling and optimization of Direct Red 16 adsorption from aqueous solutions using nanocomposite of MnFe 2 O 4 /MWCNTs: RSM-CCRD model

Cited by 56 publications

References 61 publications

Process optimisation of methylene blue sequestration onto physical and chemical treated coffee husk based adsorbent

Process optimisation of methylene blue sequestration onto physical and chemical treated coffee husk based adsorbent

Enhanced adsorptive removal of Indigo carmine dye performance by functionalized carbon nanotubes based adsorbents from aqueous solution: equilibrium, kinetic, and DFT study

Electrochemical Sensor Based on Carbon Nanotubes Decorated with ZnFe₂O₄ Nanoparticles Incorporated Carbon Paste Electrode for Determination of Metoclopramide and Indomethacin

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Modeling and optimization of Direct Red 16 adsorption from aqueous solutions using nanocomposite of MnFe 2 O 4 /MWCNTs: RSM-CCRD model

Cited by 56 publications

References 61 publications

Process optimisation of methylene blue sequestration onto physical and chemical treated coffee husk based adsorbent

Process optimisation of methylene blue sequestration onto physical and chemical treated coffee husk based adsorbent

Enhanced adsorptive removal of Indigo carmine dye performance by functionalized carbon nanotubes based adsorbents from aqueous solution: equilibrium, kinetic, and DFT study

Electrochemical Sensor Based on Carbon Nanotubes Decorated with ZnFe2O4 Nanoparticles Incorporated Carbon Paste Electrode for Determination of Metoclopramide and Indomethacin

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Product

Resources

About

Electrochemical Sensor Based on Carbon Nanotubes Decorated with ZnFe₂O₄ Nanoparticles Incorporated Carbon Paste Electrode for Determination of Metoclopramide and Indomethacin