Effects of nanoscale zero valent iron (nZVI) concentration on the biochemical conversion of gaseous carbon dioxide (CO2) into methane (CH4)
- Authors
- Dong, Dandan; Aleta, Prince; Zhao, Xin; Choi, Oh Kyung; Kim, Sungpyo; Lee, Jae Woo
- Issue Date
- 3월-2019
- Publisher
- ELSEVIER SCI LTD
- Keywords
- Nanoscale zero valent iron; Biomethanation; Methanogenesis; Homoacetogenesis; Anaerobic digestion
- Citation
- BIORESOURCE TECHNOLOGY, v.275, pp.314 - 320
- Indexed
- SCIE
SCOPUS
- Journal Title
- BIORESOURCE TECHNOLOGY
- Volume
- 275
- Start Page
- 314
- End Page
- 320
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/67174
- DOI
- 10.1016/j.biortech.2018.12.075
- ISSN
- 0960-8524
- Abstract
- This study presents the effects of nanoscale zero valent iron (nZVI) concentration on the biomethanation of gaseous CO2. During anaerobic batch experiment with 9 times injection of CO2, the CO2 concentration in the headspace rapidly decreased by dissolution. Then, when nZVI was added at 6.25 and 12.5 g/L, the dissolved CO2 was biochemically transformed into CH4 at a maximum production rate of 2.38 and 3.93 mu mol/hr, respectively. Biomethanation at these two nZVI concentrations continued until the end of experiment. In spite of more H-2 evolution by nZVI at 25 g/L, biomethanation did not occur, due to the significant inhibition of methanogenesis by nZVI. As the nZVI concentration increased, relative abundance of the hydrogenotrophic methanogens, especially Methanobacteriales, increased. However, at 25 g/L of nZVI concentration, acetic acid was accumulated and the relative abundance of Clostridium became predominant, indicating that homoacetogenesis was superior over methanogenesis.
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Collections - Graduate School > Department of Environmental Engineering > 1. Journal Articles
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