Publication Details

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Title (Primary) Effect of nitrate on sulphur transformations depending on carbon load in laboratory-scale wetlands treating artificial sewage
Title (Secondary) Advances in Environmental Science and Engineering. Selected, peer reviewed papers from the 2012 International Conference on Energy and Environmental Protection (ICEEP 2012), June 23-24, 2012, Hohhot, China
Author Wu, S.; Lv, T.; Li, C.; Kuschk, P.; Wiessner, A.; Pang, C.; Dong, R.;
Publisher Iranpour, R.; Zhao, J.; Wang, A.; Yang, F.; Li, X.;
Journal Advanced Materials Research
Year 2012
Department UBT;
Volume 518-523
Language englisch;
Abstract

Two laboratory-scale constructed wetlands planted with Juncus effusus were used to investigate the dynamics of sulphur transformations under varying nitrate and organic carbon loads as well as its interactions with microbial carbon and nitrogen transformations. The removal of dissolved organic carbon was obtained to be around 65-87% with specific removal load of 1.40-2.63 g/m2 d. 94% of nitrate removal (under inflow concentration of 15 mg/L) irrespective of organic carbon loads indicated a highly active denitrification process in wetlands. Sulphate reduction was performed at a high level of 83% in a low redox potential (about -300 mV) under condition of inflow organic carbon concentration of 50 mg/L. The dosage of nitrate in the inflow can strongly hinder the process ofdissimilatory microbial sulphate. The coexist of sulphide with concentration of 1.65-2.65 mg/L and elemental sulphur of 0.17-2.18 mg/L in the pore water of wetlands demonstrated a simultaneous occurrence of microbial sulphate reduction and sulphide oxidation. A lower ammonium oxidation removal was initiated, which was probably caused by the toxic effect of sulphide with concentration of about 3 mg/L in the pore water. The sulphide concentration in the pore water was highly exponentially correlated with the redox potential, indicating the control of sulphide in wetlands could be performed by the adjustment of redox potential via aeration and/or nitrate dosage.

ID 12464
Persistent UFZ Identifier https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=12464
Wu, S., Lv, T., Li, C., Kuschk, P., Wiessner, A., Pang, C., Dong, R. (2012):
Effect of nitrate on sulphur transformations depending on carbon load in laboratory-scale wetlands treating artificial sewage
In: Iranpour, R., Zhao, J., Wang, A., Yang, F., Li, X. (eds.)
Advances in Environmental Science and Engineering. Selected, peer reviewed papers from the 2012 International Conference on Energy and Environmental Protection (ICEEP 2012), June 23-24, 2012, Hohhot, China
Advanced Materials Research 518-523
Trans Tech Publications, Durnten-Zurich, p. 1902 - 1912