scholarly journals ADSORPTION OF Ca(II), Pb(II) AND Ag(I) ON SULFONATO-SILICA HYBRID PREPARED FROM RICE HULL ASH

2011 ◽  
Vol 11 (3) ◽  
pp. 273-278 ◽  
Author(s):  
Siti Sulastri ◽  
Nuryono Nuryono ◽  
Indriana Kartini ◽  
Eko Sri Kunarti
Keyword(s):  
Aqueous Solution ◽  
Ion Exchange ◽  
Functional Group ◽  
Sodium Hydroxide Solution ◽  
Exchange Capacity ◽  
Rice Hull ◽  
Rice Hull Ash ◽  
Ion Exchange Capacity ◽  
X Ray ◽  
Silica Hybrid

In this research, adsorption of Ca(II), Pb(II) and Ag(I) in aqueous solution onto sulfonato-silica hybrid (SSH) prepared from rice hull ash (RHA) has been studied. The preparation of SSH adsorbent was carried out by oxidation of mercapto-silica hybrid (MSH) with hydrogen peroxide (H2O2) solution 33%. MSH was prepared, via sol-gel process, by adding 3 M hydrochloric acid solution to mixture of sodium silicate (Na2SiO3) solution and 3(trimethoxysilyl)-1-propanthiol (MPTS) to reach pH of 7.0. Solution of Na2SiO3 was generated from destruction of RHA with sodium hydroxide solution followed with heating at 500 °C for 30 min. The SSH produced was characterized with Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD) analyzer, energy dispersive X-ray (EDX) spectroscopy and determination of ion-exchange capacity for sodium ion (Na+). The adsorption of Ag(I) and Ca(II) were conducted in a batch system in various concentrations for one hour. The adsorbent ion was calculated based on difference of concentrations before and after adsorption process determined using atomic absorbance spectrophotometric (AAS) method. The adsorption character was evaluated using model of isotherm Langmuir and Freundlich adsorption to calculate the capacity, constants and energy of adsorption. Result of characterization by EDX and FTIR showed qualitatively that SSH has been successfully synthesized which were indicated by appearance of characteristic absorbance of functional group namely silanol (Si-OH), siloxane (Si-O-Si), methylene (-CH2-) and disappearance of mercapto group (SH). The XRD data showed amorphous structure of SSH, similar to silica gel (SG) and MSH. The study of adsorption thermodynamics showed that oxidation of MSH into SSH increases the ion-exchange capacity for Na+ from 0.123 to 0.575 mmol/g. The change in functional group from silanol to mercapto and from mercapto to sulfonato increases the adsorption capacity of Ca(II). However, the capacity order of adsorbents for both ions of Pb(II) and Ag(I) in aqueous solution is MSH > SG > SSH.

The Synthesis and Ion-Exchange Property of Inorganic Material Mg1.5Mn0.5Ti0.75O4

2012 ◽  
Vol 511 ◽  
pp. 105-108
Author(s):  
Jin He Jiang
Keyword(s):  
Ion Exchange ◽  
Inorganic Material ◽  
Exchange Capacity ◽  
Exchange Property ◽  
Insertion Reaction ◽  
Ion Exchange Capacity ◽  
X Ray ◽  
Thermal Crystallization ◽  
Crystallization Method ◽  
Saturation Capacity

Mg1.5Mn0.5Ti0.75O4 was prepared by a coprecipitation/thermal crystallization method. The extraction/insertion reaction with this material was investigation by X-ray, saturation capacity of exchange, and Kd measurement. The acid treatments of Mg1.5Mn0.5Ti0.75O4 caused Mg2+ extractions of more than 72%, while the dissolutions of Mn4+ and Ti4+ were less than 8.2%. The results showed that the Li+ extraction/insertion be progressed mainly by an ion-exchange mechanism. The acid treated samples had an ion exchange capacity of 10.6mmol/g for Li+.

Ion exchange of H+/Na+ in polyantimonic acid, doped with vanadium ions

2020 ◽  
Vol 92 (3) ◽  
pp. 505-514
Author(s):  
Liliya Yu. Kovalenko ◽  
Vladimir A. Burmistrov ◽  
Yuliya A. Lupitskaya ◽  
Fedor A. Yaroshenko ◽  
Elena M. Filonenko ◽  
...  
Keyword(s):  
Ion Exchange ◽  
Exchange Capacity ◽  
Unit Cell ◽  
Ion Exchange Capacity ◽  
Solid Solution Formation ◽  
X Ray ◽  
Polyantimonic Acid ◽  
Section Size ◽  
Pyrochlore Type ◽  
Vanadium Ions

AbstractThe influence of doping of polyantimonic acid with vanadium ions on the ion exchange H+/Na+ kinetics is determined. With the help of the X-ray analysis it is shown that doped compounds H2Sb2-xVxO6-δ  · nH2O, where x = 0.14; 0.36; 0.48 have the pyrochlore-type structure. With the increase of the amount of vanadium in a sample there is a decrease of a unit cell parameter. It is determined that there is a reduction of a unit cell frame, formed by antimonic and vanadium ions, and a size reduction of hexagonal cavities, in which protons are located. It is shown that during the ion exchange of H+/Na+ there is a change of the unit cell plane without a symmetry breaking of a crystal structure, which demonstrates solid solution formation. With the increase of the amount of vanadium in the sample there is a decrease of the ion-exchange capacity, which is connected with the decrease of the channel’s section size. The ion exchange H+/Na+ kinetics has been studied with the approximation of the Boyd’s model for the intergrain diffusion. Diffusion coefficients had the order 10−13 m2/s and decreased with the increase of the amount of vanadium in the sample.

The Synthesis and Ion-Exchange Property of Li+ Memorized Inverse Spinel Mg2Ti0.5(PO4)2

2012 ◽  
Vol 512-515 ◽  
pp. 1014-1017
Author(s):  
Jin He Jiang
Keyword(s):  
Ion Exchange ◽  
Exchange Capacity ◽  
Exchange Property ◽  
Inverse Spinel ◽  
Spinel Type ◽  
Ion Exchange Capacity ◽  
X Ray ◽  
Crystallization Method ◽  
Ft Ir ◽  
Ft Ir Spectroscopy

A inverse spinel-type metal compound [Mg2Ti0.5(PO4)2], was prepared by a solid state reaction crystallization method. The Li+extraction/insertion with this material were investigated by X-ray, FT-IR spectroscopy, and Kd measurement, The acid treated samples had an ion exchange capacity of 8.7mmol/g for Li+. It had a memorial ion-sieve property for Li+.

Property of LiMn0.5Ti0.75O3 Type Ion-Exchangers and Extraction for Lithium

2012 ◽  
Vol 549 ◽  
pp. 118-121
Author(s):  
Jin He Jiang
Keyword(s):  
Solid State ◽  
Ion Exchange ◽  
Solid State Reaction ◽  
Exchange Capacity ◽  
Exchange Mechanism ◽  
Metal Compound ◽  
Spinel Type ◽  
Ion Exchange Capacity ◽  
X Ray ◽  
Crystallization Method

A spinel-type metal compound [LiMn0.5Ti0.75O3], was prepared by a solid state reaction crystallization method. The Li+ extraction/insertion with this material were investigated by X-ray and Kd measurement. The results showed that the Li+ extraction/insertion be progressed mainly by an ion-exchange mechanism. The acid treated samples had an ion exchange capacity of 4.2mmol/g for Li+.

Adsorption of gold(III) on ionic imprinted amino-silica hybrid prepared from rice hull ash

2012 ◽  
Vol 85 (1) ◽  
pp. 211-223 ◽  
Author(s):  
Satya Candra Wibawa Sakti ◽  
Dwi Siswanta ◽  
Keyword(s):  
Aqueous Solution ◽  
Contact Time ◽  
Sol Gel ◽  
Ion Concentration ◽  
Rice Hull ◽  
Rice Hull Ash ◽  
Batch System ◽  
Pseudo Second Order ◽  
Gel Technique ◽  
Silica Hybrid

In this research, the adsorption of Au(III) ion on ionic imprinted amino-silica hybrid (Im-ASH) in aqueous solution has been studied. Im-ASH was synthesized via sol-gel technique using a solution of sodium silicate (Na2SiO3) from rice hull ash (RHA) as the precursor and Au(III) ion as the template. Adsorption was carried out in a batch system with variation of pH, contact time, and Au(III) ion concentration. The selectivity of adsorbent toward Au(III) was examined in the presence of Cu(II) ion. The result of the kinetic study demonstrated that the adsorption of Au(III) ion followed pseudo-second order. The optimum adsorption of Au(III) on Im-ASH and non-Im-ASH was obtained at pH of 3.0. Im-ASH was twice as selective toward Au(III) ion than ASH was.

DETERMINATION OF CHROMIUM(VI) IN WATER BY PIXE ANALYSIS USING ION EXCHANGE PAPER — LIMIT OF DETECTION AND INTERFERENCE BY COEXISTING ANIONS

2009 ◽  
Vol 19 (01n02) ◽  
pp. 1-8 ◽  
Author(s):  
SUREERAT THOMYASIRIGUL ◽  
HITOSHI FUKUDA ◽  
JUN HASEGAWA ◽  
YOSHIYUKI OGURI
Keyword(s):  
Ion Exchange ◽  
Proton Energy ◽  
Limit Of Detection ◽  
Deae Cellulose ◽  
Exchange Capacity ◽  
Ion Exchange Capacity ◽  
Pixe Analysis ◽  
X Ray ◽  
Chromium Vi

Concerning the PIXE analysis of Cr ( VI ) in water using ion-exchange filters, the limit of detection (LOD) and the influence of matrix anions were investigated. In order to look for the experimental condition for obtaining the minimum LOD, we measured the Cr - K α X-ray counts and background counts under the K α X-ray peak as a function of the incident proton energy and the thickness of the Mylar absorber foil in front of the detector. To investigate the interference by coexisting anions, each of PO 43-, SO 42-, NO 3-, Cl -, and F - ions and Cr ( VI ) ions were mixed in aqueous solutions and adsorbed on DE81-DEAE cellulose paper, a weakly basic anion exchanger with diethylaminoethyl functional groups. Then the filter samples were measured by PIXE using 2.5 MeV proton beams. We obtained a LOD of 0.16 µg or 8 ppb for 20 mL samples at a proton energy of 2.5 MeV and a Mylar film thickness of 50 or 100 µm. The experimental results on the mixed solutions indicated that NO 3-, Cl -, and F - as coexisting ions didn't interfere significantly with determination of a 50 µ g / L Cr ( VI ) concentration for 40 mL total solution volume, despite the total amount of anions was about 90% of ion exchange capacity of a filter. On the other hand, slight interferences by PO 43- ions were observed. However, under the same condition, we found that if the total amount of SO 42- ions was higher than 20% of ion exchange capacity, they induced significant interferences in determining Cr ( VI ).

The Synthesis and Ion-Exchange Property of Li+ Memorized Inverse Spinel Al0.75Fe1.25(PO4)2

2012 ◽  
Vol 490-495 ◽  
pp. 3864-3867
Author(s):  
Jin He Jiang ◽  
Bin Shan
Keyword(s):  
Ion Exchange ◽  
Exchange Capacity ◽  
Exchange Property ◽  
Inverse Spinel ◽  
Spinel Type ◽  
Ion Exchange Capacity ◽  
X Ray ◽  
Crystallization Method ◽  
Ft Ir ◽  
Ft Ir Spectroscopy

Compound Al0.75Fe1.25(PO4)2, a inverse spinel-type metal compound, was prepared by a solid state reaction crystallization method. The Li+ extraction/insertion with this material were investigated by X-ray, FT-IR spectroscopy, and Kd measurement, The chemical analysis showed that the Li+ extraction/insertion be progressed mainly by an ion-exchange mechanism. The acid treated samples had an ion exchange capacity of 4.0mmol/g for Li+. It had a memorial ion-sieve property for Li+.

scholarly journals Modified Phillipsite as a Novel Ion-Exchanger for Potassium Extraction from Seawater

2019 ◽  
Vol 25 (4) ◽  
pp. 441-445
Author(s):  
Chunxia MENG ◽  
Jin HOU
Keyword(s):  
Hydrothermal Synthesis ◽  
Ion Exchange ◽  
Average Particle Size ◽  
Selectivity Coefficient ◽  
Exchange Capacity ◽  
Ion Exchanger ◽  
Average Particle ◽  
Mixed Solution ◽  
Ion Exchange Capacity ◽  
X Ray

Template-free preparation of phillipsite as a novel K+ ion-exchanger was studied systematically by hydrothermal synthesis. The alkalinity, dosage of water glass, dosage of H2O, aging time, reaction temperature and time of hydrothermal synthesis were discussed in detail. The optimized material obtained about phillipsite through the synthesis and testing methods was performed. The K+ ion-exchange capacity and selectivity coefficient were tested. The molar composition for preparing high performance phillipsite obtained was 2K2O:18SiO2:Al2O3:510H2O by optimizing synthetic conditions. The K+ ion-exchange capacity of phillipsite was 57.3 mg/g in seawater. The K+ selectivity coefficient was 88.6 in an equimolar K+ and Na+ mixed solution. Phillipsite can selectively capture K+ over other ions, and therefore can be used for potassium extraction selectively from seawater. Phillipsite was characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDS). The XRD pattern indicated that the synthetic zeolite was phillipsite. The phillipsite particles exhibited cross-like shape and the average particle size was about 2.5 μm. The synthetic phillipsite was mainly consisted of Si, Al, K and O elements.

scholarly journals Application of Activated Carbon for the Sorption of Some Heavy Metals from Aqueous Solution and Their Determination by Atomic Spectroscopy

1996 ◽  
Vol 14 (1) ◽  
pp. 47-57 ◽  
Author(s):  
A. Gierak
Keyword(s):  
Aqueous Solution ◽  
Ion Exchange ◽  
Sorption Isotherms ◽  
Hydrogen Atmosphere ◽  
Exchange Capacity ◽  
Atomic Spectroscopy ◽  
Carbon Surface ◽  
Active Carbons ◽  
Ion Exchange Capacity ◽  
Basic Characteristics

This paper presents investigations on the possible application of Polish active carbons, obtained by the carbonization of plum stones, in the sorption and preconcentration of selected heavy metal ions, i.e. FeIII, PbII, NiII, ZnII, CoII and CdII, from aqueous solution. The effect of modifying the active carbon surface with oxidizing (HNO3, H2O, air and steam) and reducing (H2) agents on the sorption and ion-exchange capacity of the carbon was examined. The basic characteristics of the porous structure of the tested adsorbents, as well as their ion-exchange capacities towards cations and anions, were determined. In addition, the sorption isotherms of individual ions in the concentration range 10−4–10−2 mol/1, as well as the effect of the pH of the solution on the sorption of the ions, were investigated. As far as the utilization of the prepared sorbents to isolate and preconcentrate trace amounts of tested ions is concerned, the best results were obtained for active carbons thermally treated at 800°C in a hydrogen atmosphere.

Sign in / Sign up

Export Citation Format

Share Document