摘要
以花生杆为原料高温热解制备了生物炭,并对其进行碱改性和铁改性。采用孔径与比表面积分析仪、扫描电镜、傅里叶变换红外光谱对制备的生物炭进行表征,探究了生物炭对诺氟沙星(NOR)的吸附机制及影响因素。结果表明,碱改性及铁改性提升了生物炭的比表面积、孔隙结构,改变了官能团。3种生物炭对NOR的吸附更符合准二级动力学模型和Freundich等温吸附模型。随着生物炭投加量的增加,生物炭对NOR的吸附量降低,去除率增加。随pH的增加,生物炭对NOR的吸附先增加后降低。相比之下,铁改性生物炭对NOR的吸附效果最好。
the biochar was prepared by pyrolysis of peanut stem as raw material.Biochar was modified by alkali and iron compound respectively.The biochar was characterized by aperture and specific surface area analyzer,scanning electron microscope(SEM)and Fourier transform infrared spectroscopy,(FTIR).The adsorption mechanism and influencing factors of norfloxacin(NOR)were investigated as well.The results showed that the specific surface area and pore structure of biochar were increased by alkali modification and iron modification,the functional groups were changed as well.The adsorption of NOR by three kinds of biochar was more consistent with the quasi-second-order kinetic model and the Freundich isothermal adsorption model.With the increase of biochar dosage,the adsorption capacity of biochar for NOR decreased and the removal rate increased.With the increase of pH,the adsorption of NOR by biochar increased at first and then decreased.In contrast,iron modified biochar has the best adsorption capacity on NOR.
作者
曾宪彩
郭萌
芮琼阳
薛艳
ZENG Xian-cai;GUO Meng;RUI Qiong-yang;XUE Yan(School of Biological and Chemical Engineering,Nanyang Institute of Technology,Nanyang 473004,China;Henan Key Laboratory of Industrial Microbial Resources and Fermentation Technology,Nanyang 473004,China)
出处
《南阳理工学院学报》
2025年第4期84-90,共7页
Journal of Nanyang Institute of Technology
基金
河南省自然科学基金项目(202300410020)。
关键词
生物炭
改性
吸附
抗生素
biochar
modification
adsorption
antibiotic
