热解温度对玉米芯生物炭碳结构、灰分与吸附四环素的影响

邓玉; 佘艾伦; 张莹; 倪福全; 敖天其; 陈文清

文章摘要

邓玉,佘艾伦,张莹,倪福全,敖天其,陈文清.热解温度对玉米芯生物炭碳结构、灰分与吸附四环素的影响[J].农业环境科学学报,2024,43(5):1131-1142.

热解温度对玉米芯生物炭碳结构、灰分与吸附四环素的影响

Effects of pyrolysis temperatures on the morphological carbon structure，ash，and tetracycline adsorption of corncob biochar

投稿时间：2023-11-13

DOI：10.11654/jaes.2023-0953

中文关键词: 玉米芯生物炭碳结构四环素吸附性能

英文关键词: corncob biochar morphological carbon structure tetracycline adsorption performance

基金项目:四川省科技厅区域创新合作项目（2020YFQ0013）

作者	单位	E-mail
邓玉	四川农业大学水利水电学院, 四川雅安 625014 四川大学水利水电学院, 成都 610065
佘艾伦	四川农业大学水利水电学院, 四川雅安 625014
张莹	四川农业大学水利水电学院, 四川雅安 625014	zhangying@sicau.edu.cn
倪福全	四川农业大学水利水电学院, 四川雅安 625014
敖天其	四川大学水利水电学院, 成都 610065
陈文清	四川大学建筑与环境学院, 成都 610065

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中文摘要:

生物炭灰分和碳结构在抗生素吸附过程中的影响尚不明确。本文以玉米芯为原料，在300~800 ℃下热解制备生物炭（CBCs）及除灰分生物炭（CBCs_AW），研究热解温度对生物炭灰分和碳结构的影响，探究灰分和碳形态与四环素（TC）吸附行为之间的关系。结果表明，随着热解温度升高，生物炭的碳结构由未完全碳化有机质（300 ℃）逐渐转化为石墨碳结构（800 ℃），吸附实验结果显示CBC800_AW的吸附量最大，证实石墨碳结构是促进TC吸附量增加的重要因素。CBCs_AW对TC吸附量高于CBCs，说明灰分对TC吸附有一定抑制作用。分析TC吸附性能与生物炭理化性质的相关性，结果显示吸附量与生物炭比表面积、孔体积、芳香性和石墨化程度相关性较高，推测TC的主要吸附机理为孔隙填充作用和π-π电子供体-受体相互作用。研究结果可为生物质资源化利用和抗生素污染修复提供科学依据。

英文摘要:

In this study, corncob biochar（CBCs） and deashing biochar（CBCs_AW） were prepared by pyrolysis varing in the range of 300–800 ℃. The effect of pyrolysis temperature on the ash and carbon structure of biochar was investigated, and the relationship between ash and carbon structure and tetracycline（TC） adsorption was discussed. The results demonstrated that with the increase in pyrolysis temperature, the morphological carbon structure of biochar gradually transformed from uncarbonized organic matter（300 ℃） to graphitized carbon structure（800 ℃）. The results of adsorption experiments demonstrated that CBC800_AW had the largest adsorption capacity of TC, confirming that the graphitized carbon structure form was an important factor to promote the increase in TC adsorption capacity. The adsorption capacity of TC by CBCs_AW was all higher than that of CBCs, indicating that the ash had a certain inhibitory effect on TC adsorption. The correlation between the adsorption performance of TC and the properties of biochar was analyzed. The results demonstrated that the adsorption capacity was highly correlated with the specific surface area, pore volume, aromaticity, and graphitization degree of biochar, indicating that the main adsorption mechanism of TC was pore filling and π–π electron donor–acceptor interaction（π–π EDA）. The results can provide a scientific basis for the utilization of biomass resources and remediation of antibiotic pollution.

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