A new ion exchange adsorption mechanism between carbonate groups and fluoride ions of basic aluminum carbonate nanospheres

RSC Advances ◽  
2015 ◽  
Vol 5 (17) ◽  
pp. 13256-13260 ◽  
Author(s):  
Fang Wei ◽  
Changyan Cao ◽  
Peipei Huang ◽  
Weiguo Song
Keyword(s):  
Ion Exchange ◽  
Adsorption Mechanism ◽  
Adsorption Properties ◽  
Exchange Mechanism ◽  
Fluoride Ions ◽  
Exchange Adsorption ◽  
Basic Aluminum

Basic aluminum carbonate nanospheres exhibited excellent adsorption properties for fluoride, and a new ion exchange mechanism involving carbonate groups and fluoride ions was proposed.

scholarly journals Synthesis, Characterization, and Properties of Sulfonated Chitosan for Protein Adsorption

2020 ◽  
Vol 2020 ◽  
pp. 1-10
Author(s):  
Xiaomin Zhang ◽  
Jie Sun
Keyword(s):  
Ion Exchange ◽  
Protein Purification ◽  
Protein Adsorption ◽  
Protein Separation ◽  
Binding Capacity ◽  
Adsorption Properties ◽  
Synthesis Process ◽  
Exchange Adsorption ◽  
Good Potential

Chitosan sulfate was prepared and characterized as a new chromatography media for protein separation. The degree of sulfonation of chitosan could be well controlled and impacted under conditions in the synthesis process. The prepared chitosan sulfate shows improved binding capacity with proteins. Sulfonated chitosan shows improved ion-exchange adsorption properties with proteins, which could have good potential in protein purification.

Ion exchange/adsorption properties of crystalline compound of anatase and rutile

1997 ◽  
Vol 222 (1-2) ◽  
pp. 75-80 ◽  
Author(s):  
Song Yinjie ◽  
Jiang Liqiang ◽  
Zhao Aimin ◽  
Jin Qixin ◽  
Song Dakang
Keyword(s):  
Ion Exchange ◽  
Adsorption Properties ◽  
Crystalline Compound ◽  
Exchange Adsorption

A review on extractive fermentation via ion exchange adsorption resins opportunities, challenges, and future prospects

2021 ◽  
Author(s):  
Abdul Sattar Jatoi ◽  
Humair Ahmed Baloch ◽  
Shaukat Ali Mazari ◽  
N. M. Mubarak ◽  
Nizamuddin Sabzoi ◽  
...  
Keyword(s):  
Ion Exchange ◽  
Extractive Fermentation ◽  
Future Prospects ◽  
Exchange Adsorption

Defluorination by ion exchange of SO42− on alumina surface: Adsorption mechanism and kinetics

Chemosphere ◽  
2021 ◽  
Vol 273 ◽  
pp. 129678
Author(s):  
Yingjie He ◽  
Lei Huang ◽  
Baocheng Song ◽  
Bichao Wu ◽  
Lvji Yan ◽  
...  
Keyword(s):  
Ion Exchange ◽  
Adsorption Mechanism ◽  
Surface Adsorption ◽  
Alumina Surface ◽  
Mechanism And Kinetics

Effectiveness of Calcium Deficiency in Nanosized Hydroxyapatite for Removal of Fe(II), Cu(II), Ni(II) and Cr(VI) Ions from Aqueous Solutions

2019 ◽  
Vol 56 ◽  
pp. 17-27
Author(s):  
Van Dat Doan ◽  
Van Thuan Le ◽  
Hoang Sinh Le ◽  
Dinh Hien Ta ◽  
Hoai Thuong Nguyen
Keyword(s):  
Electron Microscopy ◽  
Ion Exchange ◽  
Aqueous Solutions ◽  
Calcium Deficiency ◽  
Exchange Mechanism ◽  
Precipitation Method ◽  
X Ray ◽  
Transmission Electron ◽  
Bet Method ◽  
Langmuir Isotherm Model

In this work, nanosized calcium deficient hydroxyapatite (nCDHA) was synthesized by the precipitation method, and then utilized as an adsorbent for removal of Fe (II), Cu (II), Ni (II) and Cr (VI) ions from aqueous solutions after characterizing it by various techniques as scanning electron microscopy (SEM), transmission electron microscopy (TEM), Fourier-transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), energy-dispersive X-ray spectroscopy (EDX) and BET method. A possible structure of synthesized nCDHA was proposed. The adsorption study indicated that the adsorption equilibrium is well fitted with Langmuir isotherm model with the maximum adsorption capacities followed the order of Fe (II) > Cu (II) > Ni (II) > Cr (VI) with the values of 137.23, 128.02, 83.19 and 2.92 mg/g, respectively. The ion-exchange mechanism was dominant for the adsorption of metal ions onto nCDHA at initial metal concentrations lower than 0.01 mol/L. Along with the ion-exchange mechanism, there was an additional precipitation occurred on the surface of nCDHA in the case of Fe (II) and Cu (II) at initial concentrations higher than 0.01 mol/L.

scholarly journals Polymer Composite—A Potential Biomaterial for the Removal of Reactive Dye

2012 ◽  
Vol 9 (4) ◽  
pp. 1823-1834 ◽  
Author(s):  
P. N. Palanisamy ◽  
A. Agalya ◽  
P. Sivakumar
Keyword(s):  
Ion Exchange ◽  
Langmuir Isotherm ◽  
Isosteric Heat ◽  
Reactive Dye ◽  
Isotherm Model ◽  
Batch Adsorption ◽  
Solution Ph ◽  
Saw Dust ◽  
Exchange Adsorption ◽  
Langmuir Isotherm Model

Poly Pyrrle saw dust composite was prepared by reinforcement of natural wood saw dust (obtained fromEuphorbia Tirucalli Lwood) and Poly Pyrrole matrix phase. The present study investigates the adsorption behaviour of Poly Pyrrole Saw dust Composite towards reactive dye. The batch adsorption studies were carried out by varying solution pH, initial dye concentration, contact time and temperature. The kinetic study showed that adsorption of Reactive Red by PPC was best represented by pseudo-second order kinetics with ion exchange adsorption. The equilibrium data were analyzed by Freundlich and Langmuir isotherm model. The equilibrium isotherm data were fitted well with Langmuir isotherm model. The maximum monolayer adsorption capacities calculated by Langmuir model were 204.08 mg/g for Reactive Red at 303 K. The thermodynamic parameters suggest the spontaneous, endothermic nature of ion exchange adsorption with weak Vader walls force of attraction. Activation energy for the adsorption of Reactive by Poly Pyrrole Composite was 11.6387 kJ/mole, Isosteric Heat of adsorption was 48.5454 kJ/mole also supported the ion exchange adsorption process in which forces of attraction between dye molecules and PPC is weak.

Effect of Heat Modification and Biofilm on Zeolite Adsorption Properties

2010 ◽  
Vol 439-440 ◽  
pp. 956-959 ◽  
Author(s):  
Hong Long ◽  
Jin Long Zuo
Keyword(s):  
Ion Exchange ◽  
Adsorption Capacity ◽  
Mean Value ◽  
Adsorption Properties ◽  
Ammonia Removal ◽  
Ammonium Ion ◽  
Modified Zeolite ◽  
Langmuir Isotherms ◽  
Bench Scale ◽  
And Diffusion

In order to improve ammonia removal capability from wastewater, zeolite was modified with heat and biofilm in this paper. The results showed that the adsorption capacity of heat modified zeolite could be reach mean value of 120.18meq/100g, which was 1.55 times than virgin zeolite. The results of bench scale experiments also showed that the data in the experiments were in line with Langmuir isotherms for ammonium ion absorbed onto heat modified zeolite. Moreover the biofilm which attached on the surface of heat modified zeolite only modified the surface feature of modified zeolite, while ion-exchange and diffusion procedure were not affected.

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