| Title: | Oxalic acid-modified activated carbons under hydrothermal condition for the adsorption of the 2-butanone |
| Author(s): | Bu N; Liu X; Li T; Li R; Zhen Q; |
| Address: | "Research Center of Nano Science and Technology, College of Science, Shanghai University, No.99 Shangda Road, Baoshan District, Shanghai, 200444, PR, China. Research Center of Nano Science and Technology, College of Science, Shanghai University, No.99 Shangda Road, Baoshan District, Shanghai, 200444, PR, China. li-rong@shu.edu.cn" |
| Journal Title: | Environ Sci Pollut Res Int |
| DOI: | 10.1007/s11356-023-30095-6 |
| ISSN/ISBN: | 1614-7499 (Electronic) 0944-1344 (Linking) |
| Abstract: | "Growing volatile organic compound (VOC) emission will cause air pollution and further threaten human health. Activated carbon is widely applied to treatment of VOCs in virtue of lower cost and excellent adsorption ability. In this work, the adsorption capacity of polarity VOCs on activated carbon is improved by oxalic acid (H(2)C(2)O(4)) hydrothermal modification. After 2 M H(2)C(2)O(4) modification, the adsorption capacity of 2-butanone rose from 312.60 to 345.98 mg/g, and the time reaching saturation adsorption became shorter. BET results showed that both the specific surface area and total pore volume of 2 M H(2)C(2)O(4)-modified activated carbon increased by 3.32% and 3.9%, respectively. Both FTIR and XPS characterization confirmed variation of the surface oxygen-containing functional groups (SOFGs), while quantitative analysis via Boehm titration showed the significant increase of total acidity (61.36%), particularly the carboxyl content increased by 96.28%. The results indicated modification process can not only change the pore structure but also the SOFGs of activated carbons. The dynamic adsorption curves conform to the Bangham kinetics model, indicating that the adsorption of 2-butanone on both activated carbon is controlled by the diffusion in the pore channel. The adsorption data was also modeled by the internal particle diffusion model, and the internal diffusion adsorption stage is the rate-controlling step. The stability before and after adsorption and the cycling performance were studied" |
| Keywords: | Activated carbons Adsorption of 2-butanone Hydrothermal method Oxalic acid modification; |
| Notes: | "PublisherBu, Naijing Liu, Xiaomeng Li, Tianzhen Li, Rong Zhen, Qiang eng NO.51872184/the National Nature Science Foundation of China/ NO. 20DZ2294000/Shanghai Technical Service Center for Advanced Ceramics Structure Design and Precision Manufacturing/ NO.20010500200/Science and Technology Program Project of Shanghai/ NO. 20640770300/the Belt and Road Initiatives International Cooperation Project of China/ Germany 2023/10/01 Environ Sci Pollut Res Int. 2023 Sep 30. doi: 10.1007/s11356-023-30095-6" |
