摘要
为探究辣木籽壳生物炭对Cu^(2+)的吸附性能,以辣木籽壳为原料,1000℃热解、KOH改性制备生物炭,采用平衡吸附法研究改性前后生物炭对Cu^(2+)的吸附机理。结果表明:当p H 7.0时,加入同样量的辣木籽壳生物炭,改性后辣木籽壳生物炭对Cu^(2+)的吸附效果优于改性前。吸附过程符合Langmuir等温吸附模型和准二级动力学模型。造成这种吸附差异的原因与生物炭的比表面积、孔隙结构和芳香结构以及SiO_(2)含量有关。综上所述,所制备的辣木籽壳生物质活性炭在一定范围内对Cu^(2+)有良好的去除作用。
To reveal the adsorption performance of Moringa seed shell biochar to Cu^(2+),Moringa seed shell was used as raw material to prepare biochar under 1000℃ pyrolysis and modified with KOH. The equilibrium adsorption method was adopted to study the adsorption mechanism of Cu^(2+) by the biochar before and after modification. The results showed that the adsorption efficiency of modified Moringa seed shell biochar was better than that that of unmodified biochar under the same adsorption condition of pH 7.0. The adsorption process was in accordance with the Langmuir isothermal adsorption model and the quasi-second-order kinetic model. The difference was related to the specific surface area,pore structure and aromatic structure of the biochar as well as the content of SiO_(2). The research indicates that the prepared Moringa seed shell biochar has a good removal effect on Cu^(2+)in a certain range.
作者
李美萍
董程
王微
张生万
张金才
Li Meiping;Dong Cheng;Wang Wei;Zhang Shengwan;Zhang Jincai(College of Life Science,Shanxi University,Taiyuan 030006;Institute of Resources and Environment Engineering,Shanxi University,Taiyuan 030006)
出处
《中国农学通报》
2020年第34期84-89,共6页
Chinese Agricultural Science Bulletin
基金
山西大学引进人才建设项目(228545011)。
关键词
辣木籽壳
生物质炭
活化剂
CU2+
吸附性能
Moringa seed shell
biochar
activating agent
Cu^(2+)
adsorption property
作者简介
第一作者:李美萍,女,1977年出生,副教授,博士,主要从事食品化学和化学计量学的工作。通信地址:030006山西省太原市小店区坞城路92号山西大学生命科学学院,Tel:0351-7010599,E-mail:lmpmg@sxu.edu.cn;通讯作者:张金才,男,1975年出生,副教授,博士,主要从事固体废弃物回收利用。通信地址:030006山西省太原市小店区坞城路92号山西大学资源与环境工程研究所,Tel:0351-7018553,E-mai:lzhangjc@sxu.edu.cn。
