期刊论文

Preparation of biochar from Solidago canadensis L. stalk and its pyridine adsorption performance

Tan, J.

中文

环境化学

0254-6108

2021

40

6

1922-1932

10.7524/j.issn.0254-6108.2020012701

2020 年 1 月 27 日收稿（Received：January 27，2020）． * 湖南省自然科学基金 (2018JJ5015) 和长沙市科学技术局 (kq1801021) 资助. Supported by the Natural Science Foundation of Hunan Province(2018JJ5015) and Changsha Science and Technology Bureau(kq1801021). * * 通讯联系人 Corresponding author，Tel：0731-84673886，E-mail：12374811@qq.com

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以中晚期生长的加拿大一枝黄花茎秆为材料,在热解温度400—650 ℃下制备生物炭,探究了生物炭对吡啶的去除效果.采用红外光谱、扫描电镜、比表面积测定仪和X射线衍射仪表征生物炭的微观结构,考察吡啶的初始浓度、反应时间、生物炭用量等对其吸附性能的影响,探讨了其吸附动力学和吸附等温曲线.结果表明,随着炭化温度升高,生物炭的含氧官能团、芳香化程度和比表面积增大;烧结温度为600 ℃制备的生物炭结构规则,稳定性最佳.当吡啶浓度为100 mg·L~(-1)时,生物炭的用量为2 g·L~(-1)时,600 ℃所制生物炭的吸附性能最佳,反应2 h后达到吸附平衡,吸附容量为32.9 mg·g~(-1).吡啶的吸附符合伪一级动力学模...

Biochar was prepared with Solidago canadensis L. of middle and late phase at the temperature of 400 —650 ℃ and its pyridine adsorption capability was investigated. The microstructures of the biochar were characterized by infrared spectroscopy, scanning electron microscopy, specific surface area analyzer and X-ray diffraction. The effects of the initial pyridine concentration, reaction time and the dosage on the adsorption properties of biochar were discussed. The adsorption kinetics and isothermal curves were also investigated. Results showed...