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Title: Trivalent chromium removal from aqueous solutions by a sol–gel synthesized silica adsorbent functionalized with sulphonic acid groups

Abstract

Highlights: • Corpuscular sulphonic acid-functionalized silica holds improved uptake of chromium. • Mesopores on adsorbent facilitate (CH{sub 3}COO){sub 2}Cr{sup +} ion uptake on sulphonate sites. • Formation of chromium acetate sulphonate complex proposed from XPS results. • Fixed bed chromium uptake results suggest potential industrial use. - Abstract: A high capacity hybrid silica adsorbent was synthesized via sol–gel processing with sulphonic acid groups as trivalent chromium complex ions chelators from aqueous solutions. The synthesis included co-condensation of tetraethoxysilane (TEOS) with 3-(mercaptopropyl)trimethoxysilane (MPS), and oxidation of thiol to sulphonic acid groups. Chromium uptake kinetic, batch and fixed-bed experiments were performed to assess the removal of this metal from aqueous solutions. {sup 13}C, {sup 29}Si CPMAS NMR, FTIR, XPS were used to characterize the adsorbent structure and the nature of chromium complexes on the adsorbent surface. Chromium maximum uptake was obtained at pH 3 (72.8 mg/g). Elemental analysis results showed ligand density of 1.48 mmol sulphonic groups/g. About 407 mL of Cr(III) solution (311 mg/L) were treated to breakthrough point reaching ≤0.06 mg/L at the effluent. These results comply with USEPA regulation for chromium concentration in drinking water (≤0.1 mg/L). The adsorbent shows potential to be used in chromium separations to themore » industrial level.« less

Authors:
 [1];  [2];  [3];  [4];  [1]
  1. Departamento de Ingeniería Química, Universidad de Guadalajara, Blvd. Marcelino García Barragán # 1421, esq. Calzada Olímpica, C.P. 44430 Guadalajara, Jalisco (Mexico)
  2. Departamento de Química, CUCEI, Universidad de Guadalajara, Blvd. Marcelino García Barragán # 1421, esq. Calzada Olímpica, C.P. 44430 Guadalajara, Jalisco (Mexico)
  3. Departamento de Madera, Celulosa y Papel, CUCEI, Universidad de Guadalajara, Km 15.5, carretera Guadalajara-Nogales, Las Agujas, C.P. 45020 Zapopan, Jalisco (Mexico)
  4. Centro de Nanociencias y Nanotecnología, Universidad Nacional Autónoma de México, Km 107 carretera Tijuana-Ensenada, C.P. 22830 Ensenada, Baja California (Mexico)
Publication Date:
OSTI Identifier:
22420639
Resource Type:
Journal Article
Journal Name:
Materials Research Bulletin
Additional Journal Information:
Journal Volume: 59; Other Information: Copyright (c) 2014 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0025-5408
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ACETATES; AQUEOUS SOLUTIONS; CARBON 13; CHROMIUM; CHROMIUM COMPLEXES; CONCENTRATION RATIO; FOURIER TRANSFORMATION; INFRARED SPECTRA; LIGANDS; NMR SPECTRA; OXIDATION; PH VALUE; SILICA; SILICON 29; SOL-GEL PROCESS; SULFONATES; SYNTHESIS; THIOLS; UPTAKE; X-RAY PHOTOELECTRON SPECTROSCOPY

Citation Formats

Gomez-Gonzalez, Sergio Efrain, Carbajal-Arizaga, Gregorio Guadalupe, Manriquez-Gonzalez, Ricardo, De la Cruz-Hernandez, Wencel, and Gomez-Salazar, Sergio. Trivalent chromium removal from aqueous solutions by a sol–gel synthesized silica adsorbent functionalized with sulphonic acid groups. United States: N. p., 2014. Web. doi:10.1016/J.MATERRESBULL.2014.07.035.
Gomez-Gonzalez, Sergio Efrain, Carbajal-Arizaga, Gregorio Guadalupe, Manriquez-Gonzalez, Ricardo, De la Cruz-Hernandez, Wencel, & Gomez-Salazar, Sergio. Trivalent chromium removal from aqueous solutions by a sol–gel synthesized silica adsorbent functionalized with sulphonic acid groups. United States. https://doi.org/10.1016/J.MATERRESBULL.2014.07.035
Gomez-Gonzalez, Sergio Efrain, Carbajal-Arizaga, Gregorio Guadalupe, Manriquez-Gonzalez, Ricardo, De la Cruz-Hernandez, Wencel, and Gomez-Salazar, Sergio. 2014. "Trivalent chromium removal from aqueous solutions by a sol–gel synthesized silica adsorbent functionalized with sulphonic acid groups". United States. https://doi.org/10.1016/J.MATERRESBULL.2014.07.035.
@article{osti_22420639,
title = {Trivalent chromium removal from aqueous solutions by a sol–gel synthesized silica adsorbent functionalized with sulphonic acid groups},
author = {Gomez-Gonzalez, Sergio Efrain and Carbajal-Arizaga, Gregorio Guadalupe and Manriquez-Gonzalez, Ricardo and De la Cruz-Hernandez, Wencel and Gomez-Salazar, Sergio},
abstractNote = {Highlights: • Corpuscular sulphonic acid-functionalized silica holds improved uptake of chromium. • Mesopores on adsorbent facilitate (CH{sub 3}COO){sub 2}Cr{sup +} ion uptake on sulphonate sites. • Formation of chromium acetate sulphonate complex proposed from XPS results. • Fixed bed chromium uptake results suggest potential industrial use. - Abstract: A high capacity hybrid silica adsorbent was synthesized via sol–gel processing with sulphonic acid groups as trivalent chromium complex ions chelators from aqueous solutions. The synthesis included co-condensation of tetraethoxysilane (TEOS) with 3-(mercaptopropyl)trimethoxysilane (MPS), and oxidation of thiol to sulphonic acid groups. Chromium uptake kinetic, batch and fixed-bed experiments were performed to assess the removal of this metal from aqueous solutions. {sup 13}C, {sup 29}Si CPMAS NMR, FTIR, XPS were used to characterize the adsorbent structure and the nature of chromium complexes on the adsorbent surface. Chromium maximum uptake was obtained at pH 3 (72.8 mg/g). Elemental analysis results showed ligand density of 1.48 mmol sulphonic groups/g. About 407 mL of Cr(III) solution (311 mg/L) were treated to breakthrough point reaching ≤0.06 mg/L at the effluent. These results comply with USEPA regulation for chromium concentration in drinking water (≤0.1 mg/L). The adsorbent shows potential to be used in chromium separations to the industrial level.},
doi = {10.1016/J.MATERRESBULL.2014.07.035},
url = {https://www.osti.gov/biblio/22420639}, journal = {Materials Research Bulletin},
issn = {0025-5408},
number = ,
volume = 59,
place = {United States},
year = {Sat Nov 15 00:00:00 EST 2014},
month = {Sat Nov 15 00:00:00 EST 2014}
}