Ultrasound cavitation intensified amine functionalization: A feasible strategy for enhancing CO2 capture capacity of biochar

Impact of Biomass Sources on Acoustic-Based Chemical Functionalization of Biochars for Improved CO2 Adsorption

“…Q700) in 250 mL of water for 30 s. Prior to physical activation, pH was measured (Oakton pH 700 benchtop meter). Our previous study demonstrated that 30 s of acoustic irradiation was enough to induce surface area enhancement . In contrast, the prolonged sonication diminished the effect of ultrasound on surface area enhancement, most likely through disarranging the orientation of the layered structures and blocking pores .…”

Development of Biochars Derived from Water Bamboo (Zizania latifolia) Shoot Husks Using Pyrolysis and Ultrasound-Assisted Pyrolysis for the Treatment of Reactive Black 5 (RB5) in Wastewater

“…Biochar, which is produced by thermal decomposition of carbon-rich biomass wastes under oxygen-limited conditions (<900 • C), has attracted progressive interest as a greatly promising and economical material for a number of applications, including soil amendment [1][2][3], carbon sequestration [4][5][6][7][8][9], activator and catalyst [10][11][12], electrode materials [13][14][15][16], and wastewater treatment [17][18][19]. This is attributed to its high carbon content, stable structure, large area, and porous surface, cation exchange capacity, and eco-friendly characteristics [20]. Biochar is a potential and low-cost adsorbent for organic and inorganic contaminants in the environment; however, the removal efficiency is lower than that of activated carbon [21].…”

“…Ultrasonic sonication-combined amination has been used to activate pinewood-derived biochar for CO 2 capture [20]. Low-frequency ultrasonic irradiation at 30 s led to the physical activation of biochar owing to the exfoliating surface and dispatching the irregular graphitic layers of biochar, creating new pores and unclogging blocked micropores.…”

Sustainable synthesis of rose flower-like magnetic biochar from tea waste for environmental applications

“…Chemically, it is a char black carbon that comprises a large fraction of organic matter [1] . Biochars are widely studied due to their low cost and versatile applications [8] , [9] in agriculture such as improved soil fertility, water retention or crop yield [2] , [5] , [10] , environmental protection and CO 2 capture [11] , adsorption of organic [12] , inorganic contaminants [12] and over-enriched nutrients (N and P) in aquatic environment) [13] , as well as material studies [14] .…”