Optimising Low Temperature Pyrolysis of Mesoporous Alginate-Derived Starbon® for Selective Heavy Metal Adsorption.
ChemSusChem
; 17(17): e202400015, 2024 Sep 09.
Article
en En
| MEDLINE
| ID: mdl-38546163
ABSTRACT
In response to the ever increasing need to develop more efficient and sustainable methods for removing heavy metal contaminants from aqueous systems, the following article reports on the design of highly mesoporous alginate-derived materials (Starbon®) and their application to the adsorption of heavy metals. Using the Starbon® process to expand, dry and pyrolyse an inherently porous polysaccharide precursor, it was possible to produce mesoporous materials (BJH mesopore volumes 0.81-0.94â
cm3 g-1) with large surface areas (157-297â
m2 g-1) across a range of low pyrolysis temperatures (200-300 °C). The mechanisms of thermal decomposition were explored in terms of chemical and structural changes using N2-sorption porosimetry, thermogravimetric analysis, titration, FT-IR spectroscopy and 13C NMR spectroscopy. It was found that, as a result of intermolecular dehydration and crosslinking, sufficient chemical stability is obtained by the intermediate temperature of 250 °C, with limited improvement seen at higher temperatures. In addition, the materials retained large metal adsorption capacities (0.70-1.72â
mmol g-1) as well as strong selectivity for Cu2+ ions (over Co2+ and Ni2+), as compared to commercial petrochemical-derived cation exchange resin Amberlite™ Mac 3H. Thus, highlighting the potential of Starbon® materials as a sustainable answer to the widespread problem of heavy metal-contaminated wastewaters.
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1
Colección:
01-internacional
Base de datos:
MEDLINE
Idioma:
En
Revista:
ChemSusChem
Asunto de la revista:
QUIMICA
/
TOXICOLOGIA
Año:
2024
Tipo del documento:
Article
Pais de publicación:
Alemania