Post-modification of nanoporous silica type SBA-15 by bis(3-triethoxysilylpropyl)tetrasulfide as an efficient adsorbent for arsenic removal

A silica-based mesoporous adsorbent, SBA-15-S4 was synthesized through the surfactant method and modified by bis(3-triethoxysilylpropyl) tetrasulfide. The obtained sorbent was characterized by FT-IR, BET, TGA, XRD, SEM, TEM, SAXS and EDX. Further studies revealed that the new synthesis sorbent has a...

Full description

Saved in:
Bibliographic Details
Published in:Powder technology 2017-09, Vol.319, p.271-278
Main Authors: Vojoudi, Hossein, Badiei, Alireza, Bahar, Shahriyar, Mohammadi Ziarani, Ghodsi, Faridbod, Farnoush, Ganjali, Mohammad Reza
Format: Article
Language:English
Subjects:
Adsorbents
Adsorption
Arsenic
Arsenic removal
Atomic absorption spectrometer
Chemical synthesis
Drinking water
Ions removal
pH effects
Pollutant removal
SBA-15
Scanning electron microscopy
Silica
Silicon dioxide
Studies
Tetrasulfide
Water analysis
Water sampling
Water treatment
Well water
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 silica-based mesoporous adsorbent, SBA-15-S4 was synthesized through the surfactant method and modified by bis(3-triethoxysilylpropyl) tetrasulfide. The obtained sorbent was characterized by FT-IR, BET, TGA, XRD, SEM, TEM, SAXS and EDX. Further studies revealed that the new synthesis sorbent has a high capacity to adsorb As(III) ions. The main experimental factors affecting removal efficiency of the adsorbent including pH and concentration of the sample solution, contact time, type and quantity of the eluent were all optimized. Under the optimal conditions, the maximum adsorption capacity of the modified SBA-15 was calculated to be 322.6mgg−1. The adsorption mechanism was also studied, and it was found that the Langmuir isotherm model well fitted in the obtained equilibrium data of adsorption process. The sorbent was successfully used in arsenic removal from three real water samples, including tap water, well water and lake water. [Display omitted] •Mesoporous SBA-15 was functionalized with bis(3-triethoxysilylpropyl)tetrasulfide.•The functionalized mesoporous silica had high surface areas.•High removal efficiencies of As(III) ions were achieved with modified SBA-15.•The modified SBA-15 shows a good regeneration and reusability performance.•The modified SBA-15 was applied for removal of As(III) ions in real water samples.
ISSN:0032-5910
1873-328X
DOI:10.1016/j.powtec.2017.06.028