| Literature DB >> 29554745 |
Aliya R Satayeva1, Carol A Howell2, Alina V Korobeinyk3, Jakpar Jandosov4, Vassilis J Inglezakis1, Zulkhair A Mansurov4, Sergey V Mikhalovsky5.
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.Entities:
Keywords: Activated carbon; Biomass; Nitrate ions adsorption; Nitrogen functionalization; Rice husk carbonization; Surface modification
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Year: 2018 PMID： 29554745 DOI： 10.1016/j.scitotenv.2018.02.329
Source DB: PubMed Journal: Sci Total Environ ISSN： 0048-9697 Impact factor: 7.963