Adsorption Mechanisms of Dodecylbenzene Sulfonic Acid by Corn Straw and Poplar Leaf Biochars
文献类型：期刊论文
| 作者 | Zhao, Nan; Lv, Yizhong; Zhu, Ling; Zhang, Jing; Yang, Xixiang |
| 刊名 | MATERIALS
 |
| 出版日期 | 2017-10-01 |
| 卷号 | 10期号:10页码:- |
| 关键词 | Corn Straw Poplar Leaf Biochar Structural Characteristics Adsorption Mechanism |
| 英文摘要 | Biochar is an eco-friendly, renewable, and cost-effective material that can be used as an adsorbent for the remediation of contaminated environments. In this paper, two types of biochar were prepared through corn straw and poplar leaf pyrolysis at 300 degrees C and 700 degrees C (C300, C700, P300, P700). Brunaer-Emmett-Teller N-2 surface area, scanning electron microscope, elemental analysis, and infrared spectra were used to characterize their structures. These biochars were then used as adsorbents for the adsorption of dodecylbenzene sulfonic acid (DBSA). The microscopic adsorption mechanisms were studied by using infrared spectra, C-13-nuclear magnetic resonance spectra, and electron spin resonance spectra. The surface area and pore volume of C700 (375.89 m(2)/g and 0.2302 cm(3)/g) were the highest among all samples. Elemental analysis results showed that corn straw biochars had a higher aromaticity and carbon to nitrogen (C/N) ratio than the poplar leaf biochars. High temperature caused the increase of carbon content and the decrease of oxygen content, which also gave the biochars a higher adsorption rate. Pseudo-second order kinetic provided a better fit with the experimental data. Adsorption isotherm experiments showed that the adsorption isotherm of C300 fit the linear model. For other biochars, the adsorption isotherms fitted Langmuir model. Biochars with high temperatures exhibited enhanced adsorption capacity compared with ones at low temperatures. The q(max) values of biochars to DBSA followed the order of P700 > C700 > P300. The adsorption mechanisms were complex, including partition, anion exchange, the formation of H bonds, covalent bonds, and charge transfer. The adsorption by covalent bonding might be the key mechanism determining the adsorption capacity of P700. |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/39463]  |
| 专题 | 生态环境研究中心_环境纳米材料实验室 |
| 推荐引用方式 GB/T 7714 | Zhao, Nan,Lv, Yizhong,Zhu, Ling,et al. Adsorption Mechanisms of Dodecylbenzene Sulfonic Acid by Corn Straw and Poplar Leaf Biochars[J]. MATERIALS,2017,10(10):-. |
| APA | Zhao, Nan,Lv, Yizhong,Zhu, Ling,Zhang, Jing,&Yang, Xixiang.(2017).Adsorption Mechanisms of Dodecylbenzene Sulfonic Acid by Corn Straw and Poplar Leaf Biochars.MATERIALS,10(10),-. |
| MLA | Zhao, Nan,et al."Adsorption Mechanisms of Dodecylbenzene Sulfonic Acid by Corn Straw and Poplar Leaf Biochars".MATERIALS 10.10(2017):-. |
入库方式： OAI收割
来源：生态环境研究中心
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。