The Preparation of Lithium Ion Sieve and Determination of its Adsorption Performance Parameters

2013 ◽  
Vol 706-708 ◽  
pp. 353-356
Author(s):  
Jiu Chen Jia ◽  
Li Fang Chen ◽  
Yong Xin Qi ◽  
Xiao Dong Luan ◽  
Hua Wen Wang ◽  
...  
Keyword(s):  
Nitric Acid ◽  
Adsorption Capacity ◽  
Loss Rate ◽  
Lithium Ion ◽  
Performance Parameters ◽  
Adsorption Experiment ◽  
Adsorption Time ◽  
Adsorption Performance ◽  
Equilibrium Adsorption Capacity

This paper chose LiMn2O4 as ion-sieve. In the ion-sieve precursor pickling experiment, the elution effects of hydrochloride, nitric acid and sulfate were compared and hydrochloride was proved the suitable eluent. By changing the acidity of pickling time, the lithium evacuation rate and the manganese solution loss rate basically achieved balance after pickling for 5 h. The static adsorption experiment suggested that when the pH was 12.5 and adsorption time was 30 h, the equilibrium adsorption capacity was 19.71 mg/g.

Study on Synthesis and Properties of Spinel Structure Li1+xMn2-xO4 for Lithium Ion-Sieve Precursor

2013 ◽  
Vol 437 ◽  
pp. 560-563
Author(s):  
Shi Tao Song ◽  
Su Xia Wu ◽  
You Shun Peng ◽  
Xue Fang Zheng ◽  
Qi Lian
Keyword(s):  
Adsorption Capacity ◽  
Spinel Structure ◽  
Ph Value ◽  
Lithium Ion ◽  
Molar Ratio ◽  
Ion Adsorption ◽  
Solid State Method ◽  
Adsorption Time ◽  
Adsorption Performance ◽  
Structure Morphology

Spinel structure Li1+xMn2-xO4 materials for lithium ion-sieve precursor were synthesized by high temperature solid state method and their adsorption properties were improved by adjusting the molar ratio of lithium to manganese. The structure, morphology and adsorption performance of the synthetic samples were characterized by XRD, SEM, and lithium ion adsorption experiments. The influences of pH value and adsorption time on adsorption capacity were discussed. The results showed that the Li1.3Mn1.7O4 material had the largest adsorption capacity and it reached up to 24.06 mg·g-1 when the pH value was 12 and the adsorption time was 10 h.

Adsorption Characteristics of Hg2+ Ions Using Fe3O4/Chitosan Magnetic Nanoparticles

2011 ◽  
Vol 291-294 ◽  
pp. 72-75 ◽  
Author(s):  
Bo Lin Liang
Keyword(s):  
Magnetic Nanoparticles ◽  
Adsorption Capacity ◽  
Uniform Distribution ◽  
Ph Value ◽  
Cross Linking ◽  
Mercury Ions ◽  
Dialdehyde Starch ◽  
Adsorption Time ◽  
Adsorption Performance ◽  
Chemical Cross Linking

Fe3O4/chitosan magnetic nanoparticles were prepared by chemical cross-linking technique, using dialdehyde starch as a crosslinker, and the adsorption performance of the adsorbent toward Hg2+ was investigated. The adsorption capacity of mercury ions was greatly affected by pH value, adsorption doses and adsorption time. Results indicated that optimal adsorption conditions were pH value, 6, adsorption doses, 140 mg.L-1, adsorption time, 20 min, and the adsorption capacity was 25.12 mg.g-1. The well-defined nanoparticles with a uniform distribution were observed.

Study on Adsorption Property of Different Adsorbents for Dibenzothiophenic Sulfur in Simulated Diesel

2013 ◽  
Vol 807-809 ◽  
pp. 2488-2491
Author(s):  
Lei Tang ◽  
Yang Yan Bian ◽  
Qun Cui ◽  
Hai Yan Wang
Keyword(s):  
Adsorption Capacity ◽  
Adsorption Property ◽  
Metal Organic Framework ◽  
Equilibrium Concentration ◽  
Equilibrium Adsorption ◽  
Bet Surface Area ◽  
Initial Concentration ◽  
Adsorption Performance ◽  
Metal Organic ◽  
Equilibrium Adsorption Capacity

It’s more difficult to remove dibenzothiophenic sulfur in diesel. Adsorption performance of self-made metal-organic framework on Cu-BTC, MCM-22, alumina and silica gel for 4-methyldibenzothiophene (4-MDBT) and 4,6-dimethyldibenzothiophene(4,6-DMDBT) in simulated diesel at room temperature were investigated. The results show, BET surface area of Cu-BTC is up to 1501m2/g. When the initial concentration of sulfur in 4-MDBT is 46.80mg S/L, the static equilibrium adsorption capacity of Cu-BTC for 4-MDBT in simulated diesel is 2.40mg S/gads, which is about 20 times than that of other adsorbents. When the initial concentration of sulfur in 4,6-DMDBT is 48.47mg S/L, the equilibrium adsorption capacity of Cu-BTC for 4,6-DMDBT in simulated diesel is 2.04mg S/gads. The adsorption isotherms of Cu-BTC for 4-MDBT and 4,6-DMDBT indicate that when the equilibrium concentration of sulfur is 50mg S/L, the adsorption performance of Cu-BTC for 4-MDBT and 4,6-DMDBT following the order is 4-MDBT>4,6-DMDBT.

Study on the Adsorption Performance of Zn(II) over Bentonite

2013 ◽  
Vol 575-576 ◽  
pp. 276-279
Author(s):  
Guo Xiang Pan ◽  
Ya Jing Zhang ◽  
Da Gan Chai ◽  
Yan Fei Yu
Keyword(s):  
Kinetic Equation ◽  
Adsorption Capacity ◽  
Adsorption Mechanism ◽  
Ph Value ◽  
Langmuir Equation ◽  
Adsorption Time ◽  
Adsorption Performance ◽  
Initial Ph ◽  
Increasing Process ◽  
Adsorption Activation Energy

Bentonite is applied in the simulative waste water containing Zn (II) ions in this paper, and the influences of initial pH value, temperature, adsorption time, Zn (II) concentration on the adsorption performance have been tested, and thermodynamic and kinetic equation are fitted. The results show that Zn (II) adsorption capacity increases firstly and then tends to balance as the pH increases. The higher the temperature is, the better adsorption capacity is. Zn (II) adsorption occurs within 60 minutes. Langmuir equation is used to fit adsorption thermodynamic equation, which indicates that the adsorption can occur spontaneously, and it is an endothermic and entropy increasing process. In addition, a kinetic equation is more suitable for the description of Zn (II) adsorption mechanism, and adsorption activation energy calculated is 6.90 kJ/mol.

Preparation and Adsorption Performance of Cu (II)-Imprinted ALG-CTS Complex Microspheres

2012 ◽  
Vol 268-270 ◽  
pp. 229-232 ◽  
Author(s):  
Wei Ying Zhang ◽  
Dan Chen ◽  
Xiao Li ◽  
Xiao Guang Ying
Keyword(s):  
Adsorption Isotherm ◽  
Adsorption Capacity ◽  
Adsorption Kinetics ◽  
Ionic Interaction ◽  
Experimental Conditions ◽  
Adsorption Time ◽  
Initial Concentration ◽  
Adsorption Performance ◽  
Series Of Experiments ◽  
Equilibrium Adsorption Isotherm

We prepared alginate-chitosan (ALG-CTS) complexes through ionic interaction, and then obtained Cu (II)-imprinted alginate-chitosan complex microspheres (Cu-ALG-CTS) by coupling with ionic imprinting technology. To investigate the effects of experimental conditions on adsorption behavior, we performed a series of experiments including changing the initial concentration of Cu (II) ions and adsorption time. We found that the adsorption capacity increases with the initial concentration of Cu (II) ions. The Cu (II) ions adsorption reaches the maximum of 70.54mg/g after adsorbing for 13h when the initial concentration of Cu (II) ions is 60μg/ml. Cu-ALG-CTS shows much higher adsorption for Cu (II) ions than Zn (II) ions. And the adsorption kinetics and equilibrium adsorption isotherm were further studied.

scholarly journals Efficient Adsorption Performance of Lithium Ion onto Cellulose Microspheres with Sulfonic Acid Groups

2020 ◽  
Vol 4 (1) ◽  
pp. 6 ◽  
Author(s):  
Chenxi Xu ◽  
Tianlin Yu ◽  
Jing Peng ◽  
Long Zhao ◽  
Jiuqiang Li ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Adsorption Capacity ◽  
Photoelectron Spectroscopy ◽  
Sulfonic Acid ◽  
Lithium Ion ◽  
Batch Adsorption ◽  
Adsorption Performance ◽  
Column Adsorption ◽  
Wide Ph Range ◽  
Sulfonic Acid Groups

The separation of Li+ from an aqueous solution has received much attention in recent years because of its wide application in batteries and nuclear energy. A cellulose microsphere adsorbent with sulfonic acid groups (named as CGS) was successfully prepared by the pre-irradiation-induced emulsion graft polymerization of glycidyl methacrylate onto cellulose microspheres through subsequent sulfonation and protonation. The adsorption performance of Li+ onto the CGS adsorbent is investigated in detail. The as-prepared CGS adsorbent exhibited fast adsorption kinetics and a high adsorption capacity of Li+ (16.0 mg/g) in a wide pH range from 4 to 10. The existence of K+ and Na+ was found to have the ability to affect the adsorption capacity of Li+ due to the cation-exchange adsorption mechanism, which was further confirmed by X-ray photoelectron spectroscopy (XPS). The column adsorption experiment indicated that the adsorption capacity of CGS agreed well with the batch adsorption, and a fast desorption could be obtained in 10 min. It is expected that CGS has potential usage in the adsorption separation of Li+ from an aqueous solution.

Removal of Formaldehyde Using the Aminated Activated Carbon by Etilenodiamina

2011 ◽  
Vol 311-313 ◽  
pp. 1522-1526 ◽  
Author(s):  
Jian She Tang ◽  
Xian Huai Huang ◽  
Li Xiang
Keyword(s):  
Activated Carbon ◽  
Nitric Acid ◽  
Adsorption Capacity ◽  
Ir Spectrum ◽  
Amino Group ◽  
Adsorption Performance

In order to remove formaldehyde efficiently, the activated carbon was oxidized by nitric acid and then modified by etilenodiamina. The carbon treated with nitric acid and etilenodiamina showed the significant differences in IR spectrum compare with original activated carbon. The adsorption capacity for the formaldehyde of prepared carbon and original carbon were 2.4 mg/g and 1.0 mg/g, respectively. Results demonstrate that the amino group on carbon might improve the adsorption performance of carbon for formaldehyde.

Adsorption Behavior of L-Histidine on a Novel Spherical Chitosan Adsorbent

2011 ◽  
Vol 236-238 ◽  
pp. 2574-2580
Author(s):  
Ming Hua Liu ◽  
Piao Piao Huang ◽  
Jian Yun Ou
Keyword(s):  
Adsorption Capacity ◽  
Ph Value ◽  
Equilibrium Adsorption ◽  
Solution Ph ◽  
Chitosan Beads ◽  
Adsorption Time ◽  
Initial Concentration ◽  
Adsorption Temperature ◽  
Equilibrium Adsorption Capacity ◽  
Isothermal Equation

The spherical chitosan adsorbent was prepared by graft copolymerization of acrylic acid onto the cross-linked spherical chitosan beads, and then was adopted to adsorb the L-histidine. The adsorption conditions, i.e., solution pH, adsorption time, initial concentration and adsorption temperature were optimized. The spherical chitosan adsorbent showed excellent equilibrium adsorption capacity of 78.3 mg/g for the L-histidine when the solution pH value was 7.5, adsorption time was 180 min, initial concentration was 1500 mg/L and the adsorption temperature was 25 °C. Moreover, the inorganic salt of NaCl also showed great effect on the equilibrium adsorption capacity exceeding 0.8 mol/L. The static adsorption processes followed the Langmuir adsorption isothermal equation and Freundlich adsorption isothermal equation. Furthermore, L-histidine could be desorbed with 1.5 mol/L of ammonia solution, and the regeneration capacity of the spherical chitosan adsorbent was excellent.

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