Production, characterization and adsorption studies of bamboo-based biochar/montmorillonite composite for nitrate removal. (September 2018)

• Record Type: Journal Article
• Authors: Viglašová, Eva; Galamboš, Michal; Danková, Zuzana; Krivosudský, Lukáš; Lengauer, Christian L.; Hood-Nowotny, Rebecca; Soja, Gerhard; Rompel, Annette; Matík, Marek; Briančin, Jaroslav
• Is Part Of: Waste management. Volume 79(2018)
• Page Start: 385
• Page End: 394
• Publication Date: 2018-09
• Subjects: BC biochar -- BCA bamboo based biochar -- BCD bamboo based biochar composite with montmorillonite K10 -- BET Brunauer-Emmett-Teller -- BJH Barrett Joyner Halenda -- CHNS Carbon, Hydrogen, Nitrogen and Sulphur analysis -- DI deionized water -- DR Dubinin-Radushkevich isotherm -- EDX Energy dispersive X-ray detector -- FE/SEM Field emission scanning electron microscope -- FTIR Fourier transform infrared spectroscopy -- IBI International biochar initiative -- IUPAC International union of pure and applied chemistry -- MK10 Montmorillonite K10 -- OECD Organization for Economic Co-operation and Development -- SSA Specific surface area -- TG Thermogravimetric analysis -- UV Ultraviolet spectroscopy; Biochar -- Montmorillonite -- Composite -- Characterization -- Nitrate; Hazardous wastes -- Periodicals; Refuse and refuse disposal -- Periodicals; 363.728
• DOI: 10.1016/j.wasman.2018.08.005
• Languages: English
• ISSNs: 0956-053X

Abstract

Graphical abstract: Highlights: Bamboo based biochar/montmorillonite composite preparation. Porous biochar acted as support to host particles of montmorillonite. The composite exhibited much better compared to raw biochar via nitrates removal. Abstract: 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.