Preparation of Poly(allylamine)-Silica Composites and Adsorption Performance for Heavy Metal Ions

2014 ◽  
Vol 955-959 ◽  
pp. 135-139
Author(s):  
Zhong Lei Fan ◽  
Li Wen Wang ◽  
Da Zhuang Liu
Keyword(s):  
Heavy Metal ◽  
Structural Analysis ◽  
Coupling Agent ◽  
Heavy Metal Ions ◽  
Copper Ion ◽  
Adsorption Properties ◽  
Experimental Conditions ◽  
Adsorption Performance ◽  
Adsorption Capacities ◽  
Excellent Stability

Poly (allylamine)-silica composites (PAA/SiO2) was prepared via CPTCS as coupling agent and PAA as modifier. The structure and adsorption properties of silica gel, CPTCS-SiO2 and PAA/SiO2 were determinated by FTIR, structural analysis, TG analysis and adsorption test. The results show that PAA/SiO2 had excellent adsorption capacities for Cu (II), Pb (II) and Ni (II) in aqueous solutions. Its adsorption capacities can reach 0.972mmol/g for copper ion at experimental conditions. Besides, PAA/SiO2 also possessed excellent stability in the flow tests.

Preparation And Adsorption Performance of Nano-Hydroxyapatite-Enhanced Acrylamide Hydrogel Adsorbent

2021 ◽  
Author(s):  
Zhi-Ke Wang ◽  
Ting-Ting Li ◽  
Hao-Kai Peng ◽  
Hai-Tao Ren ◽  
Ching-Wen Lou ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Heavy Metal ◽  
Compressive Strength ◽  
Adsorption Isotherm ◽  
Heavy Metal Ions ◽  
Ph Value ◽  
Adsorption Properties ◽  
Maximum Adsorption Capacity ◽  
Preparation Process ◽  
Adsorption Performance

Abstract In this study, a hydrogel adsorbent was successfully synthesized using hydroxyapatite/acrylamide/β-cyclodextrin to adsorb heavy metal ions and dyes in water. In the study, different contents of hydroxyapatite were added to the hydrogel, and then the mechanical properties and adsorption properties of the material were studied. The results show that the compressive strength of hydrogel added with hydroxyapatite increased by 37.1%. According to the adsorption isotherm model, the maximum adsorption capacity is 300mg/g. In addition, the preparation process of the composite hydrogel is simple, and can be used at a lower pH value, and can be used multiple times. Therefore, the material is of great significance to the treatment of pollutants.

scholarly journals Novel magnetically separable anhydride-functionalized Fe3O4@SiO2@PEI-NTDA nanoparticles as effective adsorbents: synthesis, stability and recyclable adsorption performance for heavy metal ions

RSC Advances ◽  
2019 ◽  
Vol 9 (17) ◽  
pp. 9533-9545 ◽  
Author(s):  
Chaoyang Jia ◽  
Junhong Zhao ◽  
Liling Lei ◽  
Xiyang Kang ◽  
Ran Lu ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Heavy Metal ◽  
Metal Ions ◽  
Heavy Metal Ions ◽  
Adsorption Performance ◽  
Magnetically Separable

A magnetically separable adsorbent, anhydride-functionalized Fe3O4@SiO2@PEI-NTDA, was successfully constructed for removal of heavy metal ions from aqueous solution.

Adsorption of Heavy Metal Ions by Chelate-Fiber Prepared by Chemical Surface Modification

2011 ◽  
Vol 308-310 ◽  
pp. 178-181
Author(s):  
Xin Liang Liu ◽  
Li Jun Wang ◽  
Yong Li Chen ◽  
Nan Chen ◽  
Shuang Fei Wang
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Heavy Metal Ions ◽  
Optimal Process ◽  
Order Model ◽  
Chemical Surface ◽  
Adsorption Capacities ◽  
Chemical Surface Modification ◽  
Pseudo Second Order ◽  
Mechanism Of Sorption

The bagasse fibers were activated by alkalize and etherified. 1,2-ethanediamine and carbon disulfide were used to modify the etherify fiber to get the chelate-fiber contained sulfur and nitrogen. The FTIR was used to characterize the xanthated aminating-fiber (XAF). The mechanism of sorption properties for heavy metal ions were studied. As the results shown, the optimal process to prepare the XAF was that the reaction time, concentration of NaOH and dosage of CS2 was 60min, 12% and 2mL, respectively. The chelate-fiber containing sulfur and nitrogen possessed high adsorption capacities for Cu(II) and the mechanism of sorption fitted the pseudo-second-order model well.

Facile one-pot synthesis of highly monodisperse nickel microspheres with raised nickel dots and their adsorption performance for heavy metal ions

2016 ◽  
Vol 45 (23) ◽  
pp. 9704-9711 ◽  
Author(s):  
Yue Teng ◽  
Le Xin Song ◽  
Wei Liu ◽  
Li Zhao ◽  
Juan Xia ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Solvothermal Synthesis ◽  
Heavy Metal Ions ◽  
One Pot ◽  
Adsorption Performance ◽  
One Pot Synthesis ◽  
High Concentrations

Monodispersed Ni microspheres with surfaces uniformly covered by Ni dots were constructed through a facile solvothermal synthesis, showing an improved ability to remove Cd2+ ions even at high concentrations in water.

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