Investigation of rice husk derived activated carbon for removal of nitrate contamination from water

Aliya R. Satayeva, Carol A. Howell, Alina V. Korobeinyk, Jakpar Jandosov, Vassilis J. Inglezakis, Zulkhair A. Mansurov, Sergey V. Mikhalovsky

Research output: Contribution to journalArticle

Abstract

Development of porous carbons with high specific surface area (>1200mg−1) targeted at nitrate removal from aqueous solutions is investigated by chemical activation of carbonized rice husk. Potassium carbonate is used as activating and desilicating agent. The effect of post-synthetic treatment by gas phase ammoxidation with ozone/ammonia or oxidation with concentrated nitric acid followed by nitrification with urea on main physicochemical properties and on the effectiveness of the activated carbons in nitrate removal is compared with those determined for a pristine activated carbonized rice husk sample. The two-fold enhancement of nitrate removal by the urea-modified activated carbon in comparison with pristine and ammoxidated sample is in direct correlation with the development of surface basic groups.
Original languageEnglish
Pages (from-to)1237-1245
Number of pages9
JournalScience of the Total Environment
Volume630
Early online date7 Mar 2018
DOIs
Publication statusPublished - 15 Jul 2018

Keywords

  • biomass
  • rice husk carbonization
  • activated carbon
  • surface modification
  • nitrogen functionalization
  • nitrate ions adsorption

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