期刊
BIORESOURCE TECHNOLOGY
卷 261, 期 -, 页码 257-264出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2018.03.108
关键词
Biochar; Hydrothermal treatment; Adsorption; Dye; Aromatic compound
资金
- Foundation of Zhejiang Provincial Key Lab. for Chem. and Bio. Processing Technology of Farm Products, Zhejiang University of Science and Technology [2016KF0021]
- Interdisciplinary Pre-research Project of Zhejiang University of Science and Technology [2015JC05Y]
A series of bamboo hydrochars were prepared through acid-assisted and two-stage hydrothermal carbonization, characterized and evaluated for the adsorption of Congo red and 2-naphthol in aqueous solutions. The hydrochars have rough surfaces with BET surface areas of 6.77-57.74 m(2)/g and oxygen-rich functional groups. The additives in feed water revealed critical influences on the physical-chemical and adsorption properties of the hydrochars. The hydrochars can adsorb the two organics effectively, the highest adsorption capacities for Congo red and 2-naphthol are 90.51 and 72.93 mg/g, respectively, at 0.1 mg/mL and 298 K. The adsorption of the two organics on the selected hydrochars is a spontaneous and mainly physical adsorption process. 95% and 92% of the adsorption equilibrium could be accomplished in one hour for Congo red and 2-naphthol on the selected hydrochars, respectively. This study provides references for the production and application of hydrochars as efficient adsorbents in wastewater treatment.
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