期刊
BIORESOURCE TECHNOLOGY
卷 244, 期 -, 页码 1456-1464出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2017.05.025
关键词
Microalgae; Biochar; p-Nitrophenols (PNP); Adsorption mechanism; Functional group
资金
- National Nature Science Foundation of China [51678188]
- Harbin Institute of Technology [AUGA5710052514]
- State Key Laboratory of Urban Water Resource and Environment [ES201602]
Biochars derived from three microalgal strains (namely, Chlorella sp. Cha-01, Chlamydomonas sp. Tai-03 and Coelastrum sp. Pte-15) were evaluated for their capacity to adsorb p-nitrophenols (PNP) using raw microalgal biomass and powdered activated carbon (PAC) as the control. The results show that BC-Cha-01 (biochar from Chlorella sp. Cha-01) exhibited a high PNP adsorption capacity of 204.8 mg g (1), which is 250% and 140% higher than that of its raw biomass and PAC, respectively. The adsorption kinetics and equilibrium are well described with pseudo-second-order equation and Freundlich model, respectively. BC-Cha-01 was found to contain higher polarity moieties with more O-containing functional groups than PAC and other microalgae-derived biochars. The strong polarity of binding sites on BC-Cha-01 may be responsible for its superior adsorption capacity. The biochars from Chlorella sp. Cha-01 seem to have the potential to serve as a highly efficient PNP adsorbent for wastewater treatment or emergency water pollution control. (C) 2017 Elsevier Ltd. All rights reserved.
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