| Literature DB >> 28522201 |
Heshan Zheng1, Wanqian Guo1, Shuo Li1, Yidi Chen1, Qinglian Wu1, Xiaochi Feng1, Renli Yin1, Shih-Hsin Ho1, Nanqi Ren1, Jo-Shu Chang2.
Abstract
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 204.8mgg-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.Entities:
Keywords: Adsorption mechanism; Biochar; Functional group; Microalgae; p-Nitrophenols (PNP)
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Year: 2017 PMID： 28522201 DOI： 10.1016/j.biortech.2017.05.025
Source DB: PubMed Journal: Bioresour Technol ISSN： 0960-8524 Impact factor: 9.642