Nitrate Removal from Groundwater by Nanoscale Zero-Valent Iron (NZVI) Coupling Autohydrogenotrophic Denitrification
- DOI
- 10.2991/emcs-16.2016.333How to use a DOI?
- Keywords
- Nitrate removal; NZVI; Chemical denitrification; Autohydrogenotrophic denitrification; Coupling system.
- Abstract
In this work, the denitrification performance of a bio-reactor based on nanoscale zero-valent iron (NZVI) coupling autohydrogenotrophic denitrification was investigated. A series of bio-reactors were configured by inoculating and acclimating pure culture capable capable of denitrification. Effects of various parameters including nitrate (NO3-_N) loading, NZVI to nitrogen ratio (Fe/N), pH and atmosphere on denitrification were evaluated by batch tests. The results showed that the optimum Fe/N and NO3--N loading were 2.8 and 105 mg/L, respectively. Dentrification process remained unaffected by pH ranging from 6.0 to 9.0, while sharp accumulation of nitrite (NO2-_N) occurred at pH 9.0. Complete NO3-_N removal was obtained by providing both nitrogen (N2) and hydrogen gas (H2). In general, excellent nitrogen removal efficiency was always achieved in the chemical-biological coupling system, indicating that the system had strong stability and adaptability for practical application, which offered both theoretic and technical supports to a new efficient and cost-effective method to eliminate NO3-_N from water.
- Copyright
- © 2016, the Authors. Published by Atlantis Press.
- Open Access
- This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).
Cite this article
TY - CONF AU - Hongyu Wang AU - Shilu Zhang AU - Dan Chen AU - Qiulai He PY - 2016/01 DA - 2016/01 TI - Nitrate Removal from Groundwater by Nanoscale Zero-Valent Iron (NZVI) Coupling Autohydrogenotrophic Denitrification BT - Proceedings of the 2016 International Conference on Education, Management, Computer and Society PB - Atlantis Press SP - 1346 EP - 1349 SN - 2352-538X UR - https://doi.org/10.2991/emcs-16.2016.333 DO - 10.2991/emcs-16.2016.333 ID - Wang2016/01 ER -