Disulfide polymer grafted porous carbon composites for heavy metal removal from stormwater runoff

Dongah Ko*, Paul D. Mines, Mogens Havsteen Jakobsen, Cafer T. Yavuz, Hans Chr B. Hansen, Henrik R. Andersen

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

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Abstract

The emerging concern of heavy metal pollution derived from stormwater runoff has triggered a demand for effective heavy metal sorbents. To be an effective sorbent, high affinity along with rapid sorption kinetics for environmental relevant concentrations of heavy metals is important. Herein, we have introduced a new composite suitable for trace metal concentration removal, which consists of cheap and common granular activated carbon covered with polymers containing soft bases, thiols, through acyl chlorination (DiS-AC). Material characterization demonstrated that the polymer was successfully grafted and grown onto the surface of the carbon substrate. The distribution coefficient for Cd2+ bonding was 89·103 L/kg at a solution concentration of 0.35 mg/L, which is notably higher than sorption affinities for Cd2+ seen in conventional sorbents. The sorption isotherm is well described by the Freundlich isotherm and within an hour, half of the initial trace (0.2 mg/L) concentration of Cd2+ was removed by the DiS-AC at a sorbent loading of 2 g/L. Therefore, the novel material DiS-AC promises to be an ideal candidate for filters treating stormwater runoff.
Original languageEnglish
JournalChemical Engineering Journal
Volume348
Pages (from-to)685-692
ISSN1369-703X
DOIs
Publication statusPublished - 2018

Keywords

  • Acyl chlorination surface modification
  • Polymer grafted carbon
  • Stormwater runoff
  • Heavy metal removal
  • Cadmium

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