南京师大学报（自然科学版）2025，Vol.48Issue(6)：28-35,8.DOI:10.3969/j.issn.1001-4616.2025.06.004
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
Study on the Physicochemical Properties of Biochars Prepared from Barley Grass and Pine Needle Under Different Drying Pretreatment Methods
摘要
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.关键词
生物炭/干燥方式/理化性质/稳定性Key words
biochar/drying method/physicochemical properties/stability分类
资源环境引用本文复制引用
Zheng Chu,Xu Na,Dong Haiyan,Lin Yuxia,Shi Chenfei,Wang Guoxiang..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(6):28-35,8.基金项目
江苏省农业科技自主创新资金项目(CX(21)3165). （CX(21）
