期刊
BIORESOURCE TECHNOLOGY
卷 266, 期 -, 页码 139-150出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2018.06.054
关键词
Char; Cr(III) removal; Gasification; Rice waste streams
资金
- FEDER through the Operational Program for Competitive Factors of COMPETE
- Portuguese funds through FCT (Foundation for Science and Technology) [PTDC/AAG-REC/3477/2012 - RICEVALOR, FCOMP-01-0124-FEDER-027827]
- FCT/MTCES
- QREN
- COMPETE
- FEDER
- Foundation for Science and Technology [SFRH/BPD/93407/2013, SFRH/BD/101751/2014, UID/QUI/50006/2013]
- ERDF under the PT2020 Partnership Agreement [POCI-01-0145-FEDER-007265]
- Fundação para a Ciência e a Tecnologia [UID/QUI/50006/2013, PTDC/AAG-REC/3477/2012, SFRH/BD/101751/2014] Funding Source: FCT
Blends of rice waste streams were submitted to co-gasification assays. The resulting chars (G1C and G2C) were characterized and used in Cr(III) removal assays from a synthetic solution. A Commercial Activated Carbon (CAC) was used for comparison purposes. The chars were non-porous materials mainly composed by ashes (68.3-92.6% w/w). The influences of adsorbent loading (solid/liquid ratio - S/L) and initial pH in Cr(III) removal were tested. G2C at a S/L of 5 mg L-1 and an initial pH of 4.50 presented an uptake capacity significantly higher than CAC (7.29 and 2.59 mg g(-1), respectively). G2C was used in Cr(III) removal assays from an industrial wastewater with Cr(III) concentrations of 50, 100 and 200 mg L-1. Cr(III) removal by precipitation (uptake capacity ranging from 11.1 to 14.9mg g(-1)) was more effective in G2C, while adsorption (uptake capacity of 16.1 mg g(-1)) was the main removal mechanism in CAC.
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