Selective adsorption of toxic heavy metal ions using guanine-functionalized mesoporous silica [SBA-16-g] from aqueous solution

The removal of toxic metal ions e.g. Pb2+, Hg2+ and Cd2+ from aqueous solution were explored using guanine functionalized SBA-16 [SBA-16-G]. Nitrogen sorption isotherm, HRXRD, FESEM, HRTEM, EDA-X analysis were performed to investigate the changes in the surface morphology and chemical characteristic...

Full description

Saved in:
Bibliographic Details
Published in:Microporous and mesoporous materials 2019-11, Vol.288, p.109577, Article 109577
Main Authors: Gupta, Radha, Gupta, Sunil Kumar, Pathak, Devendra Deo
Format: Article
Language:English
Subjects:
Guanine functionalized SBA-16
Isotherms
Kinetics
Mesoporous material
Proficient adsorption
Toxic heavy metal ions
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The removal of toxic metal ions e.g. Pb2+, Hg2+ and Cd2+ from aqueous solution were explored using guanine functionalized SBA-16 [SBA-16-G]. Nitrogen sorption isotherm, HRXRD, FESEM, HRTEM, EDA-X analysis were performed to investigate the changes in the surface morphology and chemical characteristics of [SBA-16-G] before and after the adsorption of toxic metal ions. Owing to the presence of large number of active functional groups of –NH, –CO on the surface, this adsorbent demonstrated proficient toxic metal ions removal capacities (maximum adsorption capacity, qmax: 289.9 mg g−1 for Pb2+ at 303 K, 259.9 mg g−1 for Hg2+ at 308 K and 228.8 mg g−1 for Cd2+ at 313 K, respectively) from aqueous medium. The isotherm study dictated that the adsorption data better comply to Langmuir isotherms with RL value 
ISSN:1387-1811
1873-3093
DOI:10.1016/j.micromeso.2019.109577