Versatile Cellulose-Based Carbon Aerogel for the Removal of Both Cationic and Anionic Metal Contaminants from Water

Sara Maaria Alatalo, Filoklis Pileidis, Ermei Mäkilä, Marta Sevilla, Eveliina Repo, Jarno Salonen, Mika Sillanpää, Maria Magdalena Titirici

Research output: Contribution to journalArticlepeer-review

122 Citations (Scopus)

Abstract

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).

Original languageEnglish
Pages (from-to)25875-25883
Number of pages9
JournalACS applied materials & interfaces
Volume7
Issue number46
DOIs
Publication statusPublished - 25 Nov 2015
Externally publishedYes

Keywords

  • adsorption
  • carbon aerogel
  • heavy metals removal
  • hydrothermal carbonization
  • water purification

ASJC Scopus subject areas

  • General Materials Science

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