Removal of methylene blue from water solution by modified nanogoethite by Cu

Salimi, Farhad; Rahimi, H.; Karami, Changiz

doi:10.5004/dwt.2019.22922

Cited by 22 publications

(5 citation statements)

References 46 publications

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“…A comparison of the maximum adsorption capacities and photocatalytic activities for ZP14 and other published nanomaterials is presented in Table 3 [ 6 , 46 , 57 , 58 , 59 , 60 , 61 ]. Based on the tabulated data for adsorption and photocatalytic degradation of methylene blue, we can conclude that nano zinc oxide/nanohydroxyapatite composite particles (ZP14) are promising solid nanomaterials in environmental applications.…”

Section: Resultsmentioning

confidence: 99%

Green Synthesis of Nano Zinc Oxide/Nanohydroxyapatite Composites Using Date Palm Pits Extract and Eggshells: Adsorption and Photocatalytic Degradation of Methylene Blue

et al. 2021

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In this study, zinc oxide nanoparticles (ZnO) and nanohydroxyapatite (NHAP) were prepared in the presence of date palm pits extract (DPPE) and eggshells, respectively. Another four nanocomposites were prepared from ZnO and NHAP in different ratios (ZP13, ZP14, ZP15, and ZP16). DPPE and all nanomaterials were characterized using GC-MS, zeta potentials, particle size distributions, XRD, TEM, EDX, FTIR, and pHPZC. The characterization techniques confirmed the good distribution of ZnO nanoparticles on the surface of NHAP in the prepared composites. Particles were found to be in the size range of 42.3–66.1 nm. The DPPE analysis confirmed the presence of various natural chemical compounds which act as capping agents for nanoparticles. All the prepared samples were applied in the adsorption and photocatalytic degradation of methylene blue under different conditions. ZP14 exhibited the maximum adsorption capacity (596.1 mg/g) at pH 8, with 1.8 g/L as the adsorbent dosage, after 24 h of shaking time, and the static adsorption kinetic process followed a PSO kinetic model. The photocatalytic activity of ZP14 reached 91% after 100 min of illumination at a lower MB concentration (20 mg/L), at pH 8, using 1.5 g/L as the photocatalyst dosage, at 25 °C. The photocatalytic degradation of MB obeyed the Langmuir–Hinshelwood first-order kinetic model, and the photocatalyst reusability exhibited a slight loss in activity (~4%) after five cycles of application.

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Section: Resultsmentioning

confidence: 99%

Green Synthesis of Nano Zinc Oxide/Nanohydroxyapatite Composites Using Date Palm Pits Extract and Eggshells: Adsorption and Photocatalytic Degradation of Methylene Blue

et al. 2021

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“…According to Fig. 11, the PSE model was fitted best to the experimental data which indicates that the rate-limiting step is the chemical absorption that involves electron transfer between the absorbent and adsorbate by the valence force [8,33]. The constants of k 1 and k 2 are shown in Table 3.…”

Section: Results Of the Adsorption Isotherms And Kineticsmentioning

confidence: 97%

“…The values of Gibbs free energy ΔG° were calculated by knowing the ΔH° and ΔS°, and ΔH° was obtained from the plot of ln K l vs. 1/T from Eq. (8). Once these two parameters were obtained, ΔG° was determined from Eq.…”

Section: Thermodynamic Studiesmentioning

confidence: 99%

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Comparison of modified boehmite nanoplatelets and nanowires for dye removal from aqueous solution

Kamari¹,

Shafiee²,

Salimi³

et al. 2019

Desalination and Water Treatment

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a b s t r a c tIn this study, boehmite (-AlOOH) nanoplatelets and nanowires were synthesized at a pH of 5 and 12, respectively, modified with sulfonic acid (-AlOOH-SA5), (-AlOOH-SA12), and were used to adsorb eriochrome black T (EbT) dye solutions. Transmission electron microscopy, scanning electron microscopy, Fourier-transform infrared spectroscopy and X-ray diffraction were used to characterize the prepared nanoplatelets and nano wires. The effect of many parameters including initial concentration, pH and contact time was investigated. Values of 212.76 and 116.28 mg g -1 were, respectively, obtained for AlOOH-SA5 and AlOOH-SA12 for the adsorption maximum of EbT. Compared between two structures, the results indicated that the optimum conditions for 100 mg L -1 EbT solution were pH of 3 and 0.5 g L -1 AlOOH-SA5 as well as pH of 3 and 1 g L -1 AlOOH-SA12. Results of adsorption isotherms and adsorption kinetics indicated which they better matched by the Langmuir isotherm and also the adsorption kinetics better described by the pseudo-second-order model. Thermodynamic parameters have been measured, and results indicate that the adsorption process was spontaneous and exothermic for AlOOH-SA12 and nonspontaneous and endothermic for AlOOH-SA5. Finally, AlOOH-SA5 is a suitable adsorbent than that of AlOOH-SA12 and can be used for dye removal in wastewater treatment processes.

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“…The positive ln K eq values in a combination with the negative ΔG° and positive ΔS° calculated for all considered temperatures, indicated that the CR adsorption onto selected fabric is spontaneous. 25 Moreover, the positive ΔH° values prove that the adsorption process is of endothermic character.…”

Section: Resultsmentioning

confidence: 99%

Oxidized jute as a valuable adsorbent for Congo Red from an aqueous solution

Ivanovska

Branković

Lađarević

et al. 2022

Journal of Engineered Fibers and Fabrics

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The raw jute fabric was oxidized with 0.2% or 0.4% NaIO4 for 60 or 120 min to obtain valuable adsorbents for the textile dye Congo Red (CR). Batch adsorption experiments were carried out as a function of solution pH, contact time, initial CR concentration, and temperature. At an initial CR concentration of 25 mg/L, the raw jute possessed the lowest adsorption due to the lowest availability and content of carboxyl and aldehyde groups capable of binding dye. The fabrics oxidized for 60 min with 0.2% NaIO4 and 120 min with 0.4% NaIO4 reached equilibrium adsorption after 240 and 330 min, respectively. The adsorption of CR onto studied fabrics followed the pseudo-second-order model indicating that the chemisorption process is primarily represented. Within the studied range of CR concentrations (25–100 mg/L), its adsorption onto fabric oxidized for 120 min with 0.4% NaIO4 obeys the Langmuir isotherm model (i.e. adsorption occurs at specific, energetically equivalent adsorbent sites with monolayer coverage of CR over a homogeneous surface), wherein the calculated maximal adsorption capacity is 12.863 mg/g. A thermodynamic study revealed the spontaneous and endothermic character of CR adsorption onto jute fabric. Based on the recorded ATR-FTIR spectra before and after CR adsorption, it is suggested that repulsion, hydrogen bonds, and π-π stacking interactions are involved in the binding of CR onto jute fabrics.

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Removal of methylene blue from water solution by modified nanogoethite by Cu

Cited by 22 publications

References 46 publications

Green Synthesis of Nano Zinc Oxide/Nanohydroxyapatite Composites Using Date Palm Pits Extract and Eggshells: Adsorption and Photocatalytic Degradation of Methylene Blue

Green Synthesis of Nano Zinc Oxide/Nanohydroxyapatite Composites Using Date Palm Pits Extract and Eggshells: Adsorption and Photocatalytic Degradation of Methylene Blue

Comparison of modified boehmite nanoplatelets and nanowires for dye removal from aqueous solution

Oxidized jute as a valuable adsorbent for Congo Red from an aqueous solution

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