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Nitrogen removal responses to biochar addition in intermittent-aerated subsurface flow constructed wetland microcosms: enhancing role and mechanism
Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaper › Journal article › Research › peer-review
DOI
- https://doi.org/10.1016/j.ecoleng.2018.12.028
Final published version
- Xu Zhou, Northwest A and F University ,
- Ruigang Wang, Northwest A and F University ,
- Hai Liu, Tsinghua University ,
- Shubiao Wu
- Haiming Wu, Northwest A and F University
This study investigated the role of biochar addition on promoting microbial nitrogen transformations in intermittent aerated subsurface flow constructed wetlands (SSF CWs) under various influent C/N ratios. The results showed that the wetland with biochar addition achieved relatively higher COD (89–99%), NH 4 + -N (97–99%) and TN (46–98%) removals. Biochar addition significantly improved TN removal, particularly under low influent C/N ratios (<7). Besides, the high adsorption characteristic of biochar attributed to the better removal performance of organics and ammonium. Moreover, the characteristics of dissolved organic matter (DOM) released from biochar was exploited by fluorescence excitation-emission spectrophotometry and parallel factor analysis (EEM-PARAFAC) combining with UV–Visible spectroscopy and results demonstrated that the adsorption-desorption of organics on biochar and DOM released from biochar were the main contributing factor for enhanced denitrification in SSF CWs.
| Original language | English |
|---|---|
| Journal | Ecological Engineering |
| Volume | 128 |
| Pages (from-to) | 57-65 |
| ISSN | 0925-8574 |
| DOIs | |
| Publication status | Published - Mar 2019 |
- Biochar addition, Constructed wetlands, Intermittent aeration, Nitrogen removal
Research areas
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ID: 156488560