期刊
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
卷 33, 期 -, 页码 239-245出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.jiec.2015.10.007
关键词
Sorption; Filtration; Engineered carbon; Heavy metals; Modified carbon
资金
- National Natural Science Foundation of China [21007026]
- NSF [CBET-1054405]
- Jiangsu Overseas Research & Training Program
- Directorate For Engineering
- Div Of Chem, Bioeng, Env, & Transp Sys [1054405] Funding Source: National Science Foundation
Engineered biochar was obtained through slow pyrolysis of hickory wood and then further modified with NaOH. After modification, biochar's surface area, cation-exchange capacity, and thermal stability were significantly improved. The modified biochar exhibited much larger (2.6-5.8 times) metal adsorption capacities than the pristine biochar. Competitive batch adsorption of mixed metal ions (Pb2+, Cd2+, Cu2+, Zn2+, and Ni2+) showed preferential adsorption of Pb2+ and Cu2+ onto the modified biochar. The alkali-modified biochar in a fixed-bed column also showed strong ability to filter heavy metals from aqueous solutions. The alkali-modified biochar thus can serve as alternative absorbent for heavy metals. (C) 2015 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.
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