Division of Environmental Science & Ecological Engineering, Korea University, Seoul 136-713, Republic of Korea.
School of Mechanical Engineering, Sungkyunkwan University, Suwon 440-746, Republic of Korea.
Bioresour Technol. 2015 Dec;197:85-90. doi: 10.1016/j.biortech.2015.08.055. Epub 2015 Aug 21.
This study aims to evaluate the physiochemical properties, sorption characteristics, and toxicity effects of biochar (BC) produced from Miscanthus sacchariflorus via slow pyrolysis at 500°C and its steam activation product (ABC). Although BC has a much lower surface area than ABC (181 and 322m(2)g(-1), respectively), the Cu sorption capacities of BC and ABC are not significantly different (p>0.05). A two-compartment model successfully explains the sorption of BC and ABC as being dominated by fast and slow sorption processes, respectively. In addition, both BC and ABC efficiently eliminate the toxicity of Cu towards Daphnia magna. However, ABC itself induced acute toxicity to D. magna, which is possibly due to increased aromaticity upon steam activation. These findings suggest that activation of BC produced from M. sacchariflorus at a pyrolytic temperature of 500°C may not be appropriate in terms of Cu sorption and toxicity reduction.
本研究旨在评估通过 500°C 慢速热解产生的芒草生物炭（BC）及其蒸汽活化产物（ABC）的物理化学性质、吸附特性和毒性效应。尽管 BC 的比表面积远低于 ABC（分别为 181 和 322m²/g），但 BC 和 ABC 的 Cu 吸附容量没有显著差异（p>0.05）。双组分模型成功地解释了 BC 和 ABC 的吸附，分别由快速和慢速吸附过程主导。此外，BC 和 ABC 都能有效地消除 Cu 对大型溞的毒性。然而，ABC 本身对大型溞产生了急性毒性，这可能是由于蒸汽活化增加了芳香性。这些发现表明，在 500°C 的热解温度下对芒草生物炭进行活化可能不利于 Cu 的吸附和毒性降低。
