| Title: | "Triple combination of natural microbial action, etching, and gas foaming to synthesize hierarchical porous carbon for efficient adsorption of VOCs" |
| Author(s): | Yu H; Lin F; Li K; Wang W; Yan B; Song Y; Chen G; |
| Address: | "School of Environmental Science and Engineering, Tianjin University/Tianjin Key Lab of Biomass/Wastes Utilization, Tianjin, 300072, PR China. School of Environmental Science and Engineering, Tianjin University/Tianjin Key Lab of Biomass/Wastes Utilization, Tianjin, 300072, PR China. Electronic address: linfawei@tju.edu.cn. School of Mechanical Engineering, Tianjin University of Commerce, Tianjin, 300134, PR China" |
| DOI: | 10.1016/j.envres.2021.111687 |
| ISSN/ISBN: | 1096-0953 (Electronic) 0013-9351 (Linking) |
| Abstract: | "Fungi residue, vinasse, and biogas residue differ from general biomass waste due to natural microbial action. Microbial fermentation helps create natural channels for the permeation of activators and produces proteins for natural nitrogen doping. Inspired by these advantages on porous carbon synthesis, this study adopted dual activators of KOH and KHCO(3) to synthesize porous carbon with different pore ratios for efficient adsorption of volatile organic compounds (VOCs). The fungi residue possessed the least lignin due to the most severe microbial action, contributing to the best pore structures after activation. The etching effect from potassium compounds and gas foaming from the carbonate decomposition contributed to creating hierarchical porous carbon with ultra-high surface area, ca. 1536.8-2326.5 m(2)/g. However, KHCO(3) addition also caused nitrogen erosion, such that lower adsorption capacity was attained even with a higher surface area when the mass ratio of KOH/KHCO(3) decreased from 2.5:0.5 to 2:1. The maximum adsorption capacities of chlorobenzene (CB) and benzene (PhH) reached 594.0 and 394.3 mg/g, respectively. Pore structure variations after adsorption were evaluated by freeze treatment to discover the adsorption mechanism. The surface area after CB and PhH adsorption decreased 40.3% and 34.5%, respectively. Most of the mesopores might transform into micropores due to the mono/multilayer stacking of adsorbates. The VOC adsorption kinetics were simulated by the Pseudo-first- and -second-order models and Y-N model. This paper provides a new approach for high-value biomass waste utilization after microbial action to synthesize efficient adsorbents for VOCs" |
| Keywords: | Adsorption Biomass *Carbon Porosity *Volatile Organic Compounds Biomass wastes Dual activators Hierarchically porous carbon Microbial action VOC adsorption; |
| Notes: | "MedlineYu, Hongdi Lin, Fawei Li, Kai Wang, Wenjun Yan, Beibei Song, Yingjin Chen, Guanyi eng Research Support, Non-U.S. Gov't Netherlands 2021/07/18 Environ Res. 2021 Nov; 202:111687. doi: 10.1016/j.envres.2021.111687. Epub 2021 Jul 15" |
