Synthesis of dithiol-modified mesoporous silica adsorbent for selective adsorption of mercury ions from wastewater

A mesoporous silica adsorbent modified with 1,2-ethane dithiol was conveniently prepared by co-condensation and further surface grafting method. To achieve this synthesis, trimethoxyvinylsilane (TMVS, 20 mol%) was introduced into the silica wall framework along with tetraethoxysilane (TEOS) in the i...

Full description

Saved in:
Bibliographic Details
Published in:Applied nanoscience 2023-09, Vol.13 (9), p.6015-6024
Main Authors: Santhamoorthy, Madhappan, Thirumalai, Dinakaran, Thirupathi, Kokila, Kim, Seong-Cheol
Format: Article
Language:English
Subjects:
Adsorbents
Adsorption
Aqueous solutions
Chemical reactions
Chemical synthesis
Chemistry and Materials Science
Condensates
Ethane
Lead
Materials Science
Membrane Biology
Metal ions
Mixtures
Nanochemistry
Nanotechnology
Nanotechnology and Microengineering
Original Article
Selective adsorption
Silicon dioxide
Sol-gel processes
Surface chemistry
Tetraethyl orthosilicate
Wastewater
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:A mesoporous silica adsorbent modified with 1,2-ethane dithiol was conveniently prepared by co-condensation and further surface grafting method. To achieve this synthesis, trimethoxyvinylsilane (TMVS, 20 mol%) was introduced into the silica wall framework along with tetraethoxysilane (TEOS) in the initial reaction mixture during the sol–gel condensation process. Next, to modify the dithiol groups onto the mesoporous silica adsorbent surfaces, the incorporated vinyl groups into the mesopore walls were reacted with 1,2-ethane dithiol via click reaction. The prepared dithiol-modified silica adsorbent (DTMSA) material was characterized by a range of instruments including XRD, FT-IR, N 2 sorption, and so on. The DTMSA material showed selective adsorption of mercury ions with high adsorption quantity of 252 mg/g and a removal capacity of nearly ~ 90% from the initial metal ion mixture containing other competitive metals (Zn 2+ , Ni 2+ , Pb 2+ , Cd 2+ , and Fe 2+ ) ions. The DTMSA adsorbent showed recyclable properties up to five cycles while treating with an acidic aqueous solution (0.1 M HCl), and therefore the DTMSA adsorbent can be recycled and reused up to five times without altering the adsorption efficiency. The experimental results demonstrated that the DTMSA adsorbent might be used for selective adsorption of harmful Hg 2+ ions from an aqueous solution.
ISSN:2190-5509
2190-5517
DOI:10.1007/s13204-022-02531-5