Hierarchical porous activated carbon from waste Zanthoxylum bungeanum branches by modified H3PO4 activation for toluene removal in air
发布时间：2024-11-29
点击次数：
- 影响因子：
- 4.223
- DOI码：
- 10.1007/s11356-022-18706-0
- 所属单位：
- 环境与资源学院
- 教研室：
- 化学工程系
- 发表刊物：
- Environmental Science and Pollution Research
- 关键字：
- Activated carbon；Toluene adsorption；Auxiliary activator H2SO4；Modifed H3PO4 activation method
- 摘要：
- Activated carbon adsorbents were prepared by chemical activation with waste Zanthoxylum bungeanum branches as raw materials and H3PO4/H2SO4 as composite activator under diferent dosages of the auxiliary activator H2SO4. The prepared samples were characterized by scanning electron microscopy (SEM), Brunauer–Emmett–Teller (BET) specific surface area test, Fourier transform infrared spectroscopy (FT-IR), and X-ray diffraction (XRD). The adsorption/desorption performances of low concentration toluene in the air were evaluated, and its reusability was evaluated by the adsorption/desorption cycle. Adsorption results were fitted using the quasi-first, quasi-second, and Bangham models. The adsorption properties of activated carbon adsorbent for toluene in the air show a “volcanic-type change trend” with the increase of H2SO4 dosage. The toluene adsorption properties of the prepared activated carbon adsorbents from high to low are as follows: BAC02>BAC05>BAC01>BAC10>BAC00. When the mass fraction of auxiliary activator H2SO4 was 2.0%, the adsorption amount of toluene on the prepared BAC02 activated carbon adsorbent increased by 51%, reaching 511 mg/g. After thermal desorption at 200℃, the adsorption performance of toluene was regenerated. The adsorption process of toluene conforms to the quasi-first-order model and Bangham model. The whole adsorption process can be divided into three stages: outer surface adsorption, intra-channel diffusion, and adsorption equilibrium. The addition amount of H2SO4 significantly affected the specific surface area, pore volume, and pore size distribution of the prepared activated carbon adsorbent.
- 第一作者：
- Haoyu Wang
- 合写作者：
- Hongmei Xie,Qihong Cao,Xiaole Li,Biyan Liu,Huijun Zhang,Xue Gao
- 论文类型：
- 源刊论文
- 通讯作者：
- Guilin Zhou
- 学科门类：
- 工学
- 文献类型：
- Journal Article
- 卷号：
- 29
- 页面范围：
- 35443–35458
- 是否译文：
- 否
- 发表时间：
- 2022-01-20
- 收录刊物：
- SCI