Journal
WATER SCIENCE AND TECHNOLOGY
Volume 77, Issue 2, Pages 548-554Publisher
IWA PUBLISHING
DOI: 10.2166/wst.2017.568
Keywords
carbon sorbents; modeling; nitrogen; sorption; water treatment
Funding
- National 'Twelfth Five-Year' Plan for Science & Technology Pillar Program [2014BAL04B04, 2015BAL01B02]
- Scientific Research Fund Project In Hubei Province Department Of Education [B2016180]
- Wuhan Water Engineering & Technology Co. Ltd
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To develop low-cost adsorbents for aqueous nitrate, biochars were prepared from three types of agricultural residuals at different pyrolysis temperatures (300 degrees C, 450 degrees C, and 600 degrees C). The corncob biochar produced at 600 degrees C (CC600) was the best nitrate adsorbent of all the tested biochars. Characterization results showed that CC600 had good thermal stability, porous structure, and abundant surface functional groups. Findings from batch adsorption experiments demonstrated that CC600 showed relatively fast adsorption kinetics to nitrate in aqueous solutions. In addition, the Langmuir adsorption capacity of CC600 to nitrate was 14.46 mg/g, comparable to that of other biochar-based adsorbents. Therefore, CC600 showed promising potential to be used as a low-cost adsorbent for the treatment of nitrate in water.
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