Neodymium embedded ordered mesoporous carbon (OMC) for enhanced adsorption of sunset yellow: Characterizations, adsorption study and adsorption mechanism

Ahmad, Zaki Uddin; Yao, Lunguang; Wang, Jin; Gang, Daniel Dianchen; Islam, Faridul; Lian, Qiyu; Zappi, Mark E.

doi:10.1016/j.cej.2018.11.174

Cited by 146 publications

(36 citation statements)

References 79 publications

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“…The adsorption capacity of Pb(II) by CES increased with the result of pH pzc value. Similar result was reported by Ahmad et al (). Moreover, according to previous research, as the pH increases, the amount of H + ions that compete with Pb(II) decreases, and Pb(II) is exchanged with Pb(OH) 2 or Pb(OH) 3 , and adsorption increases rapidly on the CES’ surface with a large cation exchange capacity.…”

Section: Resultssupporting

confidence: 92%

Assessment of the adsorption kinetics, equilibrium, and thermodynamic for Pb(II) removal using a low‐cost hybrid biowaste adsorbent, eggshell/coffee ground/sericite

Choi

2019

Water Environment Research

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A hybrid adsorbent (CES), coffee grounds, eggshell powder and sericite as a binder, was prepared to remove Pb(II) from aqueous solution. The Fourier‐transform infrared spectroscopy analysis showed that the CES contained a large amount of OH groups and had a favorable structure for adsorbing heavy metals. The value of pHpzc of CES was estimated at 7.08. In the neutral pH region, the surface of CES is negatively charged and favorable for adsorption of Pb(II). The maximum Langmuir adsorption amount was 155.67 mg/g, and the adsorption process of Pb(II) using CES fitted pseudo‐second‐order kinetic model and Langmuir isotherm model. Moreover, the analysis of adsorption energy, free energy, enthalpy, and entropy found that the adsorption of Pb(II) onto CES was physical and a spontaneous exothermic reaction. CES is a hybrid adsorbent using general municipal waste and has great advantages in terms of environmental conservation and sustainable environmental circulation. This allows it to compete with other adsorbents. Practitioner points A hybrid adsorbent, coffee grounds, eggshell, and sericite (CES), was used to remove Pb(II) Adsorption of Pb(II) using CES in an aqueous solution was physical rather than chemical CES contained a large amount of OH groups and had a favorable structure for adsorbing heavy metals The reactivity and strength of the adsorption of Pb(II) onto CES was very good CES has great advantages in terms of environmental conservation and sustainable environmental circulation.

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Section: Resultssupporting

confidence: 92%

Assessment of the adsorption kinetics, equilibrium, and thermodynamic for Pb(II) removal using a low‐cost hybrid biowaste adsorbent, eggshell/coffee ground/sericite

Choi

2019

Water Environment Research

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“…However, there is no special mention of the possible use of Nd 2 O 3 nanoparticles as materials for dye adsorption. There is only mention of the adsorption of salicyl hydroxamic acid on Nd 2 O 3 surfaces [38], as well as in another study NdCl 3 was incorporated into order mesoporous carbon (OMC) through an incipient wetness technique to enhance sunset yellow removal [39]; however the latter is a modification of OMC and not a "clear" use of Nd 2 O 3 as adsorbent.…”

Section: Introductionmentioning

confidence: 99%

Acid Dye Removal from Aqueous Solution by Using Neodymium(III) Oxide Nanoadsorbents

et al. 2020

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In the current work, neodymium oxide (Nd2O3) nanoparticles were synthesized and characterized by means of X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), and scanning electron microscopy (SEM). The major aim/investigation of this research was to fit/model and optimize the removal of Acid Blue 92 (AB92) dye from synthetic effluents (aqueous solutions) using the adsorption process based on neodymium oxide (Nd2O3) nanoparticles. To optimize the adsorption conditions, central composite design (CCD) based on response surface methodology (RSM) was applied. The effects of pH (3–9), adsorbent dosage (0.1–1 g/L), initial concentration of AB92 (100–300 mg/L), and contact time (10–100 min) on the adsorption process were investigated. Apart from equilibrium and kinetic experiments, thermodynamic evaluation of the adsorption process was also undertaken. The adsorption process was found to have the best fitting to Langmuir isotherm model and pseudo-second-order kinetic equation. Also, the process was found to be spontaneous and favorable with increased temperature. The optimal conditions found were: pH = 3.15, AB92 concentration equal to 138.5 mg/L, dosage of nanoadsorbent equal to 0.83 g/L, and 50 min as contact time, which resulted in 90.70% AB92 removal. High values for the coefficient of determination, R2 (0.9596) and adjusted R2 (0.9220) indicated that the removal of AB92 dye using adsorption can be explained and modeled by RSM. The Fisher’s F-value (25.4683) denotes that the developed model was significant for AB92 adsorption at a 95% confidence level.

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“…The Langmuir and Freundlich isotherms are basic data models to represent and comprehend adsorption process. The Langmuir isotherm model is suitable for monolayer adsorption, and the expression is as follows:

true \frac{c_{normale}}{q_{normale}} = \frac{c_{normale}}{q_{normalm}} + \frac{1}{b q_{m}}

…”

Section: Resultsmentioning

confidence: 99%

Removal of Fluoride by Graphene Oxide/Alumina Nanocomposite: Adsorbent Preparation, Characterization, Adsorption Performance and Mechanisms

et al. 2020

ChemistrySelect

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GO/Al2O3 was successfully prepared by using hydrothermal method which was used to study the removing of fluoride from water. The characterization results of X‐ray diffraction (XRD), transmission electron microscope (TEM) and Fourier transform infrared (FT‐IR) spectra indicated that γ‐Al2O3 had been modified onto GO nanosheets. The BET surface area of GO/Al2O3 is 326.22 m2 g−1 and the corresponding pore size center at 3.7 nm. A batch of fluoride adsorption experiments were employed to investigate the effects of various factors such as solution pH values, contact time, fluoride initial concentrations, temperature, adsorbent dose, co‐existing anions, and recycling on fluoride removal. The results showed that the adsorption capacity (4.68 mg g‐1) of GO/Al2O3 is higher than that of γ‐Al2O3 (3.04 mg g−1). In addition, the modified adsorbent had a wide range of pH applications. Adsorption kinetics is well represented by the pseudo‐second‐order model, which indicating the adsorption processes are involved in chemisorption with ion exchange. The influences of co‐existing anions on fluoride removal followed the decreasing order of PO43‐>HCO3‐>SO42‐>Cl‐>NO3‐, which was related to the charge and radius of ions. The recycle performance of GO/Al2O3 is not so good owing to the poor strength of GO during the cycle process. Fluoride adsorption onto GO/Al2O3 could be attributed to electrostatic attraction, ligand exchange, ion exchange and hydrogen‐bond interaction between fluoride and OH groups.

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Neodymium embedded ordered mesoporous carbon (OMC) for enhanced adsorption of sunset yellow: Characterizations, adsorption study and adsorption mechanism

Cited by 146 publications

References 79 publications

Assessment of the adsorption kinetics, equilibrium, and thermodynamic for Pb(II) removal using a low‐cost hybrid biowaste adsorbent, eggshell/coffee ground/sericite

Assessment of the adsorption kinetics, equilibrium, and thermodynamic for Pb(II) removal using a low‐cost hybrid biowaste adsorbent, eggshell/coffee ground/sericite

Acid Dye Removal from Aqueous Solution by Using Neodymium(III) Oxide Nanoadsorbents

Removal of Fluoride by Graphene Oxide/Alumina Nanocomposite: Adsorbent Preparation, Characterization, Adsorption Performance and Mechanisms

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