期刊
SCIENCE OF THE TOTAL ENVIRONMENT
卷 630, 期 -, 页码 1237-1245出版社
ELSEVIER
DOI: 10.1016/j.scitotenv.2018.02.329
关键词
Biomass; Rice husk carbonization; Activated carbon; Surface modification; Nitrogen functionalization; Nitrate ions adsorption
资金
- Nazarbayev University (project ORAU HyperActiv), Kazakhstan [SOE2015009]
- European Commission (Horizon 2020 MSCA-RISE-2016 project 'NanoMed') [734641]
- Royal Academy of Engineering, United Kingdom [IAPP/1516/46, IAPP/1516/3]
Development of porous carbons with high specific surface area (>1200 m g(-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. (C) 2018 Published by Elsevier B.V.
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