Effects of synthesis method, feedstock type, and pyrolysis temperature on physicochemical properties of biochar nanoparticles

Co-adsorption of tetracycline and Cu(ii) onto a novel amino-functionalized biochar: adsorption behavior and mechanism

“…The aromatics of biochar are related to the molar ratio of H/C, and its polarity is related to the molar ratio of (O + N + S)/C. 30 According to the results in Table 1, the polarity of NS-700 was higher than that of BS-700, and the aromatics of the two biochar samples are similar. This indicated that the modification caused a change in the polarity of biochar.…”

Definitive Review of Nanobiochar

“…Biochar nanoparticles produced using sonication/centrifugation had lower surface areas from 19.1 to 34.3 m 2 /g. The ash content was higher for biochar nanoparticles prepared via sonication/centrifugation vs the hydrothermal route . Increasing ash content, in sonication/centrifugation, probably results from salt build-up during the extraction of biochar nanoparticles.…”

“…These two methods exhibited different particle size distributions. The sonication/centrifugation sample gave 91.53 to 172.6 nm hydrodynamic sized biochar nanoparticles . Centrifugation created nanoparticles with variable sizes due to fragmentation but the acid-treated hydrothermal method provided relatively uniform particles with a “rather lower size” range (hydrodynamic size of 89.71 to 152.9 nm) .…”

“…69 A comparative study of the physicochemical properties of biochar nanoparticles produced by sonication/centrifugation versus acid-treated hydrothermal synthesis was evaluated. 71 For hydrothermal synthesis, biochar (∼5 g) was weighed and passed through fine sieves of 270-mesh (53 μm). Then, this biochar was treated with conc.…”

“…Pristine nanobiochar preparation is possible using ball milling, ,, sonication, ,− centrifugation, , and acidic hydrothermal synthesis. − These are the most widely used approaches. Other methods have also been reported, including disc milling and thermal flash pyrolysis. , Ball milling has been the most commonly used technique for preparing nanobiochar.…”