Tomin Oleksii, Vahala Riku, Yazdani Maryam R
Department of Built Environment, School of Engineering, Aalto University, P.O. Box 15200, FI-00076, Aalto, Finland.
Department of Mechanical Engineering, School of Engineering, Aalto University, P.O. Box 14400, FI-00076, Aalto, Finland.
Heliyon. 2024 Jan 15;10(2):e24722. doi: 10.1016/j.heliyon.2024.e24722. eCollection 2024 Jan 30.
The reed straw is assessed as a potential source of widely available renewable biomass for biochar production and compared with two other waste-based biomasses, namely fruit stones blend, and brewery spent grains. The biochars were activated via steam and CO. While steam activation yielded 12 % carbon from reed biomass, CO activation resulted in biomass degradation. The characterization of reed biochar showed a mesoporous structure and a high surface area of 514 m/g. The adsorption tests displayed a decent adsorption capacity of biochar, with values of 92.6 mg/g for methylene violet dye and 35.7 mg/g for acid green dye. Only 1 g/L dosage of reed biochar was able to remove 99 % of the 50 mg/L methylene violet solution in 15 min and 60 % of the 50 mg/L acid green solution in 10 min. The obtained results demonstrate reed biomass as a suitable source for biochar production as well as reed-based biochar as a promising dye adsorbent.
芦苇秸秆被评估为一种具有广泛可用性的可再生生物质来源，可用于生产生物炭，并与其他两种基于废物的生物质进行了比较，即果核混合物和啤酒糟。生物炭通过蒸汽和一氧化碳进行活化。虽然蒸汽活化从芦苇生物质中产生了12%的碳，但一氧化碳活化导致生物质降解。芦苇生物炭的表征显示出介孔结构和514 m²/g的高比表面积。吸附测试表明生物炭具有良好的吸附能力，亚甲基紫染料的吸附值为92.6 mg/g，酸性绿染料的吸附值为35.7 mg/g。仅1 g/L剂量的芦苇生物炭就能在15分钟内去除50 mg/L亚甲基紫溶液的99%，在10分钟内去除50 mg/L酸性绿溶液的60%。所得结果表明芦苇生物质是生产生物炭的合适来源，基于芦苇的生物炭是一种有前景的染料吸附剂。
