Kinetics and equilibrium studies of copper, zinc, and nickel ions adsorptive removal on to Archontophoenix alexandrae: conditions optimization by RSM

2020 ◽  
Vol 201 ◽  
pp. 289-300
Author(s):  
Raseed A. Khera ◽  
Munawar Iqbal ◽  
Aftab Ahmad ◽  
Syeda M. Hassan ◽  
Arif Nazir ◽  
...  
Keyword(s):  
Equilibrium Studies ◽  
Nickel Ions ◽  
Adsorptive Removal ◽  
Copper Zinc

ADSORPTIVE REMOVAL OF Cu (II) IONS BY DATE PITS: KINETIC AND EQUILIBRIUM STUDIES

2016 ◽  
Vol 15 (12) ◽  
pp. 2719-2732 ◽  
Author(s):  
Tarek E. Khalil ◽  
Hossam Altaher ◽  
Reda Abubeah
Keyword(s):  
Equilibrium Studies ◽  
Adsorptive Removal ◽  
Date Pits

scholarly journals A facile, versatile approach to hydroxyl-anchored metal oxides with high Cr(VI) adsorption performance in water treatment

2016 ◽  
Vol 3 (11) ◽  
pp. 160524 ◽  
Author(s):  
Ji Ma ◽  
SiZhi Zuo-Jiang ◽  
Yunhao He ◽  
Qinglei Sun ◽  
Yunguo Wang ◽  
...  
Keyword(s):  
High Performance ◽  
Hydroxyl Groups ◽  
High Concentration ◽  
Equilibrium Studies ◽  
Surface Hydroxyl ◽  
Adsorptive Removal ◽  
Surface Hydroxyl Groups ◽  
High Maximum ◽  
Ph Range ◽  
Hydroxyl Protons

In this study, a facile and versatile urea-assisted approach was proposed to synthesize Chinese rose-like NiO, pinecone-like ZnO and sponge-like CoO adsorbents. The presence of urea during syntheses endowed these adsorbents with high concentration of surface hydroxyl groups, which was estimated as 1.83, 1.32 and 4.19 mmol [OH − ] g −1 for NiO, ZnO and CoO adsorbents, respectively. These surface hydroxyl groups would facilitate the adsorption of Cr( vi ) species (e.g. HCrO 4 − , Cr 2 O 7 2− and CrO 4 2− ) from wastewater by exchanging with hydroxyl protons or hydroxide ions, and hence result in extremely high maximum adsorbed amounts of Cr( vi ), being 2974, 14 256 and 408 mg g −1 for NiO, ZnO and CoO adsorbents in the pH range of 5.02–5.66 at 298 K, respectively. More strikingly, the maximum adsorbed amounts of Cr( vi ) would be greatly enhanced as the adsorbing temperature is increased, and even amount to 23 411 mg g −1 for ZnO adsorbents at 323 K. Based on the kinetics and equilibrium studies of adsorptive removal of Cr( vi ) from wastewater, our synthetic route will greatly improve the adsorptivity of the as-synthesized metal-oxide adsorbents, and hence it will shed new light on the development of high-performance adsorbents.

Highly Sensitive Surface Plasmon Resonance Optical Sensor for Detection of Copper, Zinc, and Nickel Ions

2019 ◽  
Vol 17 (7) ◽  
pp. 497-504 ◽  
Author(s):  
Wan Mohd Ebtisyam Mustaqim Mohd Daniyal ◽  
Yap Wing Fen ◽  
Jaafar Abdullah ◽  
Nur Alia Sheh Omar ◽  
Nur Ain Asyiqin Anas ◽  
...  
Keyword(s):  
Surface Plasmon Resonance ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Optical Sensor ◽  
Nickel Ions ◽  
Highly Sensitive ◽  
Copper Zinc

scholarly journals FEATURES OF EXTRACTION OF COPPER, ZINC AND NICKEL IONS FROM AQUEOUS SOLUTIONS BY NATURAL SORBENTS, ACTIVATED MICROWAVES

2020 ◽  
Vol 2020 (60) ◽  
pp. 55-67
Author(s):  
Oksana MYAKUSH ◽  
◽  
Leonid SYSA ◽  
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Aqueous Solutions ◽  
High Energy ◽  
Natural Sorbent ◽  
Natural Sorbents ◽  
Nickel Ions ◽  
Sorption Ability ◽  
Copper Zinc ◽  
Sorption Parameters

The article is a continuation of a series of scientific works of the authors on the study of the influence of microwave irradiation on the sorption parameters of natural sorbents in the processes of purification of natural and wastewater. Using the atomic absorption method, the sorption ability of the natural sorbent clinoptilolite (zeolite type of structure) to remove Copper, Zinc and Nickel ions from aqueous solutions was studied. It was found that different variants of microwave activation of this mineral (series «Nat», «Stim» and «DIR») lead to a significant increase in the sorption capacity of clinoptilolite by ions of these heavy metals. It is shown that in comparison with similar activation schemes of another natural sorbent of bentonite (clay material), the improvement of sorption parameters of clinoptilolite with respect to heavy metals is not as significant as in the case of bentonite. It is confirmed that in almost all solutions the deposition of heavy metals on clinoptilolite occurs according to the Langmuir or Langmuir-Freundlich model. A similar situation was observed in previous works of the authors on the deposition of heavy metals on bentonite. Using scanning electron microscopy, energy dispersion spectroscopy and X-ray phase analysis, it was found that the deposition of heavy metals on both bentonite and clinoptilolite occurs not only in the form of monolayers of hydrated ions in sorbent micropores (classical model), but also in the form of individual compounds. metals. It has been suggested that the action of microwaves on these sorbents in aqueous solutions improves the structure of their micropores and affects the surface charge, so some parts of the adsorbent become active centers of crystallization of new phases - heavy metal compounds. During adsorption of heavy metal by natural bentonite or clinoptilolite, low-energy adsorption centers predominate, whereas in the case of microwave-irradiated samples of these sorbents, the experimental data correspond to a symmetric quasi-Gaussian distribution of adsorption energy where low- and high-energy regions are present. This fact indicates that electromagnetic treatment stimulates the formation of new adsorption centers.

Adsorption of Nickel Ions from Aqueous Solutions by Nano Alumina: Kinetic, Mass Transfer, and Equilibrium Studies

2011 ◽  
Vol 56 (4) ◽  
pp. 1414-1422 ◽  
Author(s):  
Varsha Srivastava ◽  
C. H. Weng ◽  
V. K. Singh ◽  
Y. C. Sharma
Keyword(s):  
Mass Transfer ◽  
Aqueous Solutions ◽  
Equilibrium Studies ◽  
Nickel Ions ◽  
Nano Alumina

scholarly journals Adsorption of Nickel Ion by Low Cost Carbon-Kinetic, Thermodynamic and Equilibrium Studies

2009 ◽  
Vol 6 (s1) ◽  
pp. S347-S357 ◽  
Author(s):  
V. Vijayakumaran ◽  
S. Arivoli ◽  
S. Ramuthai
Keyword(s):  
Langmuir Isotherm ◽  
Metal Ion ◽  
Low Cost ◽  
Mineral Acid ◽  
Ion Concentration ◽  
Isotherm Models ◽  
Equilibrium Studies ◽  
Nickel Ion ◽  
Nickel Ions ◽  
Initial Ph

A carbonaceous adsorbent prepared from an indigenous waste, by acid treatment was tested for its efficiency in removing nickel ion. The process parameters studied include agitation time, initial metal ion concentration, carbon dose, pH and temperature. The adsorption followed first order reaction equation and the rate is mainly controlled by intraparticle diffusion. Freundlich and Langmuir isotherm models were applied to the equilibrium data. The adsorption capacity (Qm) obtained from the Langmuir isotherm plot were found to around 43 mg/g at an initial pH of 7.0. The temperature variation study showed that the nickel ions adsorption is endothermic and spontaneous with increased randomness at the solid solution interface. Significant effect on adsorption was observed on varying the pH of the nickel ion solutions. The Langmuir and Freundlich adsorption isotherms obtained, positive ΔH0value, pH dependent results and desorption of metal ions in mineral acid suggest that the adsorption of nickel ion on MCC involves chemisorption as well as physisorption mechanism.

Kinetic and Equilibrium Studies on Adsorptive Removal of Toluidine Blue by Water-Insoluble Starch Sulfate

2011 ◽  
Vol 56 (5) ◽  
pp. 1875-1881 ◽  
Author(s):  
Lei Guo ◽  
Guiying Li ◽  
Junshen Liu ◽  
Songmei Ma ◽  
Jinfeng Zhang
Keyword(s):  
Toluidine Blue ◽  
Equilibrium Studies ◽  
Adsorptive Removal

Kinetic and Equilibrium Studies on Removal of Nickel Ions onto Pomegranate Peel

2013 ◽  
Vol 16 (4) ◽  
pp. 11-17
Author(s):  
Safanah A. Farhan ◽  
◽  
Rasha M. Dadoosh ◽  
Ayad T. Mahmood ◽  
◽  
...  
Keyword(s):  
Pomegranate Peel ◽  
Equilibrium Studies ◽  
Nickel Ions

scholarly journals Selective Sulfidation of Copper, Zinc and Nickel Ions in Simulated Plating Wastewater with Calcium Sulfide and Filtration Characteristics of Metal Sulfide Slurry Formed

2009 ◽  
Vol 60 (6) ◽  
pp. 405-412
Author(s):  
Katsuhide SOYA ◽  
Dalibor KUCHAR ◽  
Mitsuhiro KUBOTA ◽  
Hitoki MATSUDA ◽  
Tadashi FUKUTA ◽  
...  
Keyword(s):  
Metal Sulfide ◽  
Calcium Sulfide ◽  
Nickel Ions ◽  
Copper Zinc ◽  
Plating Wastewater
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