Journal
WASTE MANAGEMENT
Volume 79, Issue -, Pages 385-394Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.wasman.2018.08.005
Keywords
Biochar; Montmorillonite; Composite; Characterization; Nitrate
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Funding
- Ernst Mach grant by BMWFW [ICM-2016-03533]
- Science and Scientific Grant Agency VEGA [2/0158/15, 1/0507/17]
- Research excellence center on earth sources, extraction and treatment - 2nd phase - Research & Development Operational Program funded by the ERDF [26220120038]
- Austrian Science Fund (FWF) project [M2200]
- University of Vienna [IP532014]
- Austrian Science Fund (FWF) [M2200] Funding Source: Austrian Science Fund (FWF)
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Biochar is a promising immobilization tool for various contaminants in liquid wastes, aqueous solutions and soils. To further improve the sorption characteristics, a biochar/montmorillonite composite was produced and synthesized in an experimental pyrolysis reactor, using bamboo as biomass feedstock. The composite was characterized by physico-chemical and structural methods (FTIR, SEM, SEM/EDX, SSA, Low temperature nitrogen adsorption method). Based on these methods, the successful preparation of a bamboo based biochar/montmorillonite composite preparation has been demonstrated. The particles of montmorillonite were distributed across the biochar surface. The adsorption studies for removal nitrates from aqueous solutions were investigated by a batch method at laboratory temperatures. The experimental data were fitted by three adsorption models (Langmuir, Freundlich and DR; R-2 > 0.93). The maximum adsorption capacity achieved by biochar at pH 4, was about 5 mg g(-1), and by biochar/montmorillonite composite 9 mg g(-1). The results suggest that the bamboo-based biochar/montmorillonite composite can be used effectively in the treatment of industrial effluents or waste water containing anionic pollutants such as nitrates. (C) 2018 Elsevier Ltd. All rights reserved.
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