[1]郑 楮,徐 娜,董海燕,等.不同干燥预处理下大麦草和马尾松针生物炭的理化性质研究[J].南京师大学报(自然科学版),2025,48(06):28-35.[doi:10.3969/j.issn.1001-4616.2025.06.004]
　Zheng Chu,Xu Na,Dong Haiyan,et al.Study on the Physicochemical Properties of Biochars Prepared from Barley Grass and Pine Needle Under Different Drying Pretreatment Methods[J].Journal of Nanjing Normal University(Natural Science Edition),2025,48(06):28-35.[doi:10.3969/j.issn.1001-4616.2025.06.004]
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不同干燥预处理下大麦草和马尾松针生物炭的理化性质研究()

《南京师大学报（自然科学版）》[ISSN:1001-4616/CN:32-1239/N]

卷:
48
期数:
2025年06期
页码:
28-35
栏目:
化学
出版日期:
2025-12-20

文章信息/Info

Title:
Study on the Physicochemical Properties of Biochars Prepared from Barley Grass and Pine Needle Under Different Drying Pretreatment Methods
文章编号:
1001-4616(2025)06-0028-08
作者:
郑 楮1; 2; 徐 娜1; 2; 董海燕1; 2; 林宇霞1; 2; 史宸菲1; 2; 王国祥1; 2
(1.南京师范大学环境学院,江苏 南京 210023)
(2.江苏省环境演变与生态建设重点实验室,江苏 南京 210023)
Author(s):
Zheng Chu1; 2; Xu Na1; 2; Dong Haiyan1; 2; Lin Yuxia1; 2; Shi Chenfei1; 2; Wang Guoxiang1; 2
(1.School of Environment,Nanjing Normal University,Nanjing 210023,China)
(2.Jiangsu Key Laboratory of Environmental Change and Ecological Construction,Nanjing 210023,China)
关键词:
生物炭; 干燥方式; 理化性质; 稳定性
Keywords:
biochar; drying method; physicochemical properties; stability
分类号:
X712
DOI:
10.3969/j.issn.1001-4616.2025.06.004
文献标志码:
A
摘要:
本文以大麦草(barley grass,BG)和马尾松针(pine needle,PN)为原料,分别采用真空冷冻和鼓风干燥预处理后热解制备生物炭,研究不同原料及制备条件下生物炭理化性质及稳定性的差异. 结果表明,随着热解温度由400 ℃升高到700 ℃,BG和PN生物炭的产率下降8.39～9.30%,可溶性有机碳(dissolved organic carbon,DOC)含量降低0.43～1.84 mg/g,表面官能团减少,灰分、C含量、pH值、典型金属(Na、Ca、K和Mg)含量增加,化学稳定性和热稳定性增强. 与同温度下制备的BG生物炭相比,PN生物炭的产率、C含量及化学稳定性较高,灰分、N含量、pH值和DOC含量较低. 干燥方式对生物炭表面官能团种类及内部晶体结构的影响不大. 与鼓风干燥法相比,冷冻干燥制得的生物炭的产率降低0.55～2.06%、DOC含量减少,同时总金属含量更高,化学稳定性更强. 本研究将为生物炭的制备尤其是前处理方法的选择提供参考和技术支撑.
Abstract:
In this paper,barley grass(BG)and pine needle(PN)were used as raw materials for the preparation of biochar through pyrolysis after pretreatment with vacuum freezing and blast drying,respectively. This study aimed to investigate the differences in the physicochemical properties and stability of biochar under different raw materials and preparation conditions. The results showed that an increase in pyrolysis temperature from 400 ℃ to 700 ℃ led to a reduction in BG and PN biochar yields by 8.39～9.30%. This was accompanied by a decrease in surface functional groups and a reduction(0.43～1.84 mg/g)in dissolved organic carbon(DOC)concentration. Conversely,the ash content,carbon content,pH,and levels of typical metals such as sodium(Na),calcium(Ca),potassium(K),and magnesium(Mg)increased,resulting in improved chemical and thermal stability. When compared to BG biochar produced at the same temperature,PN biochar exhibited a higher yield,greater carbon content,and higher chemical stability,albeit with lower ash,nitrogen content,pH and DOC levels. The drying method exerted minimal influence on the types of surface functional groups and the internal crystalline structure of the biochar. Specifically,freeze-drying resulted in a decrease(0.55～2.06%)in biochar yield and a reduction in DOC content compared to blast-drying,yet it yielded a higher total metal content and enhanced chemical stability. This study provides valuable reference and technical support for the preparation of biochar,particularly in the selection of pretreatment methods.

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备注/Memo

备注/Memo:
收稿日期:2025-02-18.
基金项目:江苏省农业科技自主创新资金项目(CX(21)3165).
通讯作者:史宸菲,博士,副教授,研究方向:碳基环境功能材料的研发及应用. E-mail:schenfei@njnu.edu.cn
更新日期/Last Update: 2025-12-20