Modeling of quaternary dyes adsorption onto ZnO–NR–AC artificial neural network: Analysis by derivative spectrophotometry

Dil, Ebrahim Alipanahpour; Ghaedi, Mehrorang; Ghaedi, A.M.; Asfaram, Arash; Goudarzi, Alireza; Hajati, Shaaker; Soylak, Mustafa; Agarwal, Shilpi; Gupta, Vinod Kumar

doi:10.1016/j.jiec.2015.11.010

Cited by 255 publications

(68 citation statements)

References 67 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…An absorption peak at 1160 cm −1 was related to Mn-OH functional group [41]. IR signals at 1629 and around 3330-3630 cm −1 were for bending and stretching vibrations of O-H of water [42]. The peak at 2350 cm −1 is a combinational band that was due to bending and vibrational modes of H-O-H.…”

Section: Ft-ir and Xrd Studiesmentioning

confidence: 97%

Adsorptive removal of Pb(II) and Zn(II) from water onto manganese oxide-coated sand: Isotherm, thermodynamic and kinetic studies

Chaudhry

Khan²,

Ali³

2016

Egyptian Journal of Basic and Applied Sciences

View full text Add to dashboard Cite

Available online A B S T R A C TManganese oxide-coated sand, MOCS, was synthesized and characterized by XRD, FTIR, SEM, and EDX techniques, and was used for the adsorption of Pb(II) and Zn(II) from their aqueous solutions. The metal ion concentration, contact time, MOCS dose and pH of the solutions were optimized. Langmuir, Freundlich, Temkin and Dubinin-Radushkevich isotherms were studied and the maximum adsorption capacities for Pb(II) and Zn(II) were found to be 147.06 and 116.28 μg/g at 40°C and 27°C, respectively. These values are higher than many tested adsorbents. The energy 0.011 and 0.079 kJ/mol for Pb(II) and Zn(II) indicated adsorption as physical process. In thermodynamics the free energy change for Pb(II) ranged between −12.344 and −11.371 kJ/mol and that for Zn(II) ranged −9.638 to −11.155 kJ/mol between 27 and 40°C that predicted the spontaneity of process. The enthalpy change −39.816 and 25.574 kJ/mol indicated the exothermic and endothermic nature of the adsorption of Pb(II) and Zn(II). Kinetic studies indicated that Pb(II) adsorption followed pseudo-second order, whereas Zn(II) followed partial pseudo-first and pseudo-second order rates. The adsorptions of both metals were controlled by film diffusion step.

show abstract

Section: Ft-ir and Xrd Studiesmentioning

confidence: 97%

Adsorptive removal of Pb(II) and Zn(II) from water onto manganese oxide-coated sand: Isotherm, thermodynamic and kinetic studies

Chaudhry

Khan²,

Ali³

2016

Egyptian Journal of Basic and Applied Sciences

View full text Add to dashboard Cite

show abstract

“…Different types of adsorbents [42][43][44][45][46][47][48][49] have been used for the removal of a variety of pollutants from water. Recently, the application of nanomaterials, nanoadsorbents has come forth as a fascinating area of interest for the removal of metallic and dye pollutants from water [50][51][52][53]. A variety of nanoparticles titanium dioxide suspensions [54], chitosan nanoparticles [55], zinc oxide nanoparticles [56], Nickel/nickel boride nanoparticles-coated resin [57], zirconium oxide nanoparticles [58], MnFeO 4 and CoFe 2 O 4 [59] have been used for the removal of metal ions from water.…”

Section: Introductionmentioning

confidence: 99%

Application of ZnO nanorods as an adsorbent material for the removal of As(III) from aqueous solution: kinetics, isotherms and thermodynamic studies

et al. 2018

View full text Add to dashboard Cite

Removal of metals from wastewaters causes a big concern from the environmental point of view due to their extreme toxicity towards aquatic life and humans. Application of As(III) from aqueous solution by ZnO nanorods as adsorbent has been investigated in the present study. The synthesized nanorods were characterized by XRD, FT-IR spectroscopy, SEM, and thermogravimetric analysis. Optimum biosorption conditions were determined with respect to pH, adsorbent dose, contact time, and temperature. The experimental data were examined using the Lagergren's first-order, pseudo-second-order and intraparticle diffusion kinetic models. The results revealed that the pseudo-second-order kinetic model provided the best description of the data. Langmuir and Freundlich isotherm models were applied to the equilibrium data. The maximum As(III) sorption capacity of ZnO nanorods was found to be 52.63 mg/g at pH 7, adsorbent dose 0.4 g, contact time 105 min, and temperature 323 K. The calculated thermodynamic parameters, ΔG o (between − 5.741, − 5.342 and − 4.538 kJ/mol at 303-323 K), ∆H o (13.75 kJ/mol) and ∆S o (0.0616 J/mol K) showed that the sorption of As(III) onto ZnO nanorods was feasible, spontaneous and exothermic, respectively.

show abstract

“…al. [27][28] reported the synthesis and characterization of zinc (II) oxide nanorods loaded on activated carbon (ZnO-NRs-AC) to prepare an outstanding adsorbent for the simultaneous adsorption of heavy metals and dyes as hazardous pollutant using ultrasound energy.…”

mentioning

confidence: 99%

Sonochemical synthesis of Gd3+ doped CoFe2O4 spinel ferrite nanoparticles and its physical properties

Yadav

Kuřitka

Vilčáková

et al. 2018

Ultrasonics Sonochemistry

148

View full text Add to dashboard Cite

In this work, a facile and green method for gadolinium doped cobalt ferrite (CoFe 2-x Gd x O 4 ; x=0.00, 0.05, 0.10, 0.15, 0.20) nanoparticles by using ultrasonic irradiation was reported. The impact of Gd 3+ substitution on the structural, magnetic, dielectric and electrical properties of cobalt ferrite nanoparticles was evaluated. The sonochemically synthesized spinel ferrite nanoparticles were characterized by X-ray Diffraction (XRD), scanning electron microscopy (SEM), Raman spectroscopy, Fourier transform infrared (FTIR) spectroscopy, X-ray photoelectron spectroscopy (XPS), vibrating sample magnetometer (VSM). X-ray diffraction (XRD) study confirmed the formation of single phase spinel ferrite of CoFe 2-x Gd x O 4 nanoparticles. XRD results also revealed that ultrasonic irradiation seems to be favourable to achieve highly crystalline single crystal phase gadolinium doped cobalt ferrite nanoparticles without any post annealing process. Fourier Transform Infrared and Raman Spectra confirmed the formation of spinel ferrite crystal structure. X-ray photoelectron spectroscopy revealed the impact of Gd 3+ substitution in CoFe 2 O 4 nanoparticles on cation distribution at the tetrahedral and octahedral site in spinel ferrite crystal system. The electrical properties showed that the Gd 3+ doped cobalt ferrite (CoFe 2-x Gd x O 4 ; x= 0.20) exhibit enhanced Page 2 of 42 dielectric constant (277 at 100 Hz) and ac conductivity (20.2 x 10 -9 S/cm at 100 Hz). The modulus spectroscopy demonstrated the impact of Gd 3+ substitution in cobalt ferrite nanoparticles on grain boundary relaxation time, capacitance and resistance. Magnetic property measurement revealed that the coercivity decreases with Gd 3+ substitution from 234.32 Oe (x=0.00) to 12.60 Oe (x=0.05) and further increases from 12.60 Oe (x=0.05) to 68.62 Oe (x=0.20). Moreover, saturation magnetization decreases with Gd 3+ substitution from 40.19 emu/g (x=0.00) to 21.58 emu/g (x=0.20). This work demonstrates that the grain size and cation distribution in Gd 3+ doped cobalt ferrite nanoparticles synthesized by sonochemical method, is effective in controlling the structural, magnetic, and electrical properties, and can be find very promising applications.Keywords: Sonochemical Synthesis, Cavitation, Nanoparticles, Magnetic Property, Dielectric Property, Impedance and Modulus Spectroscopy IntroductionSpinel ferrite nanoparticles have a vast potential for several scientific and technological Their studies on the well regenerability of the adsorbent in addition to its high adsorption capacity make it promising for such adsorption applications. The enhancement of adsorption capacity with the assistance of ultrasound was due to the hydrodynamic and thermal processes of acoustic cavitation. E.A . Dil et. al. [26] reported the synthesis of copper oxide nanoparticle-loaded activated carbon (CuO-NP-AC) and used as an efficient adsorbent for the ultrasound-assisted simultaneous removal of the Pb 2+ ion and malachite green (MG) dye. This research group observed that the...

show abstract

Modeling of quaternary dyes adsorption onto ZnO–NR–AC artificial neural network: Analysis by derivative spectrophotometry

Cited by 255 publications

References 67 publications

Adsorptive removal of Pb(II) and Zn(II) from water onto manganese oxide-coated sand: Isotherm, thermodynamic and kinetic studies

Adsorptive removal of Pb(II) and Zn(II) from water onto manganese oxide-coated sand: Isotherm, thermodynamic and kinetic studies

Application of ZnO nanorods as an adsorbent material for the removal of As(III) from aqueous solution: kinetics, isotherms and thermodynamic studies

Sonochemical synthesis of Gd3+ doped CoFe2O4 spinel ferrite nanoparticles and its physical properties

Contact Info

Product

Resources

About