Removal of Ag(I) from aqueous solution by thiourea-functionalized silica gel: experimental and theoretical study

2019 ◽  
Vol 151 ◽  
pp. 307-314 ◽  
Author(s):  
Zhendong Zhang ◽  
Xingrong Liu ◽  
Ke Wang ◽  
Yuzhong Niu ◽  
Hou Chen ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Silica Gel ◽  
Theoretical Study ◽  
Functionalized Silica

scholarly journals Adsorption of congo red dye from aqueous solution onto amino-functionalized silica gel

2018 ◽  
Vol 23 (6) ◽  
pp. 1053-1060 ◽  
Author(s):  
Raquel Studart de Farias ◽  
Hugo Leonardo de Brito Buarque ◽  
Mabel Ribeiro da Cruz ◽  
Luana Meg Freitas Cardoso ◽  
Tamyris de Aquino Gondim ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Silica Gel ◽  
Congo Red ◽  
Second Order ◽  
Functionalized Silica ◽  
Congo Red Dye ◽  
Major Mode ◽  
Effects Of Ph ◽  
Pseudo Second Order ◽  
Red Dye

ABSTRACT This study investigates the potential use of amino-functionalized silica gel as an adsorbent for the recovering of congo red dye from aqueous solution. The effects of pH, contact time, and temperature were determined and evaluated. Equilibrium isotherms were also studied. The adsorption kinetics was modeled by pseudo-first order and pseudo-second order. Furthermore, desorption of congo red was preliminarily studied. The pH range from 4.5 to 7.0 was favorable for the adsorption of congo red onto amine modified silica at 25ºC. Higher adsorption capacity was obtained at 50ºC. Langmuir and Freundlich models were fitted to the adsorption equilibrium data. The best fittings were obtained with the pseudo-second order and Langmuir model for kinetics and equilibrium, respectively. Desorption studies suggest that ion exchange might be the major mode of adsorption. KOH solution was the best desorbing agent for recovering the adsorbed dye.

scholarly journals Preparation and application of Ni(ii) ion-imprinted silica gel polymer for selective separation of Ni(ii) from aqueous solution

RSC Advances ◽  
2017 ◽  
Vol 7 (25) ◽  
pp. 15102-15111 ◽  
Author(s):  
Hongxing He ◽  
Qiang Gan ◽  
Changgen Feng
Keyword(s):  
Aqueous Solution ◽  
Silica Gel ◽  
Selective Separation ◽  
Functionalized Silica ◽  
Surface Imprinting ◽  
Surface Imprinting Technique ◽  
Ion Imprinted

A novel Ni(ii) ion-imprinted sulfonate functionalized silica gel polymer was prepared with the surface imprinting technique for selective seperation of Ni(ii) from aqueous solution.

Selective Removal of Arsenic(V) from Aqueous Solution Using A Surface-Ion-Imprinted Amine-Functionalized Silica Gel Sorbent

2012 ◽  
Vol 51 (14) ◽  
pp. 5216-5223 ◽  
Author(s):  
Hong-Tao Fan ◽  
Xuelei Fan ◽  
Jing Li ◽  
Mengmeng Guo ◽  
Dongsheng Zhang ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Silica Gel ◽  
Selective Removal ◽  
Functionalized Silica ◽  
Amine Functionalized ◽  
Ion Imprinted ◽  
Removal Of Arsenic
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