Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 7, Issue 46, Pages 25875-25883Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.5b08287
Keywords
adsorption; hydrothermal carbonization; carbon aerogel; heavy metals removal; water purification
Funding
- Finnish Funding Agency for Technology and Innovation (TEKES)
- Tekniikan edistamissatio, TES [31066]
- Spanish Ministerio de Economia y Competitividad, MINECO [MAT2012-31651]
- Fondo Europeo de Desarrollo Regional (FEDER)
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Hydrothermal carbonization of cellulose in the presence of the globular protein ovalbumin leads to the formation of nitrogen-doped carbon aerogel with a fibrillar continuous carbon network. The protein plays here a double role: (i) a natural source of nitrogen functionalities (2.1 wt %) and (ii) structural directing agent (SBET = 38 m2/g). The applicability in wastewater treatment, namely, for heavy metal removal, was examined through adsorption of Cr(VI) and Pb(II) ion solely and in a mixed bicomponent aqueous solutions. This cellulose-based carbogel shows an enhanced ability to remove both Cr(VI) (?68 mg/g) and Pb(II) (?240 mg/g) from the targeted solutions in comparison to other carbon materials reported in the literature. The presence of competing ions showed little effect on the adsorption efficiency toward Cr(VI) and Pb(II).
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