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| 热裂解温度和原料类型对生物炭品质影响的评价——基于修复重金属污染的应用潜力 |
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伏肖1，徐强1，黄晓玮1，李芷薇1，谭天骕1，易自力1,2,3，薛帅1,2,3
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| (1.湖南农业大学 生物科学技术学院,长沙 410128;2.湖南农业大学 芒属植物生态应用技术湖南省工程实验室,长沙 410128;3.湖南农业大学 国家能源非粮生物质原料研发中心湖南分中心,长沙 410128) |
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| 摘要: |
| 为综合评价热裂解温度和原料类型对生物炭品质的影响，选取了3类不同来源的17种生物质原料，分别在600、800、1 000 ℃下热裂解为51种生物炭。基于生物炭在重金属污染治理的应用，采用主成分分析法分析热裂解温度和原料类型对生物炭的理化性质的影响，并通过相关性分析筛选出了生物炭的核心指标；基于获得的核心指标，再采用灰色关联度（RI）综合评价这51种生物炭在修复重金属污染方面的综合品质潜力。结果表明与热裂解温度相比，原料类型对生物炭的理化性质影响更大。筛选所选取的9个评价指标，确定出炭率、比表面积、氢碳摩尔数比、酸性官能团含量和灰分含量为生物炭品质评价的核心指标。此外，随着热裂解温度的升高，生物炭的灰色关联度升高，1 000 ℃下的高大禾草类生物炭，如竹（RI=0.697）、南荻（RI=0.676）和柳枝稷（RI=0.671）等生物炭的综合评价指数高，说明这3种生物炭具有更大的应用潜力。 |
| 关键词: 生物质 农业废弃物 高大禾草 灰色关联度 重金属污染修复 |
| DOI：10.11841/j.issn.1007-4333.2024.09.13 |
| 投稿时间：2024-02-20 |
| 基金项目:湖南省农业领域重点研发项目（2019NK2021）；国家级大学生创新创业训练计划项目（S202310537019） |
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| Effects of different pyrolysis temperatures and feedstock types on biochar quality based on the application scenario for heavy metal contamination control |
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FU Xiao1, XU Qiang1, HUANG Xiaowei1, LI Zhiwei1, TAN Tiansu1, YI Zili1,2,3, XUE Shuai1,2,3
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| (1.College of Bioscience & Biotechnology, Hunan Agricultural University, Changsha 410128, China;2.Hunan Engineering Laboratory of Miscanthus Ecological Applications, Hunan Agricultural University, Changsha 410128, China;3.Hunan Branch, National Energy R&D Center for Non-Food Biomass, Hunan Agricultural University, Changsha 410128, China) |
| Abstract: |
| This study was designed to comprehensively evaluate the effects of pyrolysis temperatures and feedstock types on the biochar quality from 17 feedstocks under 600 ℃， 800 ℃ and 1 000 ℃， respectively. Based on the application potential of biochar in the remediation of heavy metal pollution， the principal component analysis was used to analyze the impact of pyrolysis temperature and feedstock type on the physicochemical properties of biochar. The core indicators of biochar were selected through correlation analysis. Subsequently， the grey relational grade （RI） was utilized to comprehensively evaluate the potential of these 51 biochars in remediating heavy metal pollution. The results showed that the feedstock types were more important on the physicochemical properties of biochar than that of the pyrolysis temperatures. The core indicators comprehensively expressing the biochar quality include biochar yield， specific surface area， H and C molar ratio， acid functional group and ash content. The results of gray relational degree （RI） comprehensive evaluation showed that the heavy metal remediation potential of biochar increased with the increase of pyrolysis temperature. The biochars from tall grass biomass pyrolyzed at 1 000 ℃ generally showed a good quality as suggested by the high RI of Bambusoideae （RI=0.697）， Miscanthus lutarioriparius （RI=0.676） and Panicum virgatum （RI=0.671）， respectively. |
| Key words: biomass agricultural wastes tall grass biomass gray relational analysis heavy metal remediation |
