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Title (Primary) Sulphur transformation and deposition in the rhizosphere of Juncus effusus in a laboratory-scale constructed wetland
Author Wießner, A.; Kuschk, P.; Jechorek, M.; Seidel, H.; Kästner, M.;
Journal Environmental Pollution
Year 2008
Department UBT;
Volume 155
Issue 1
Language englisch;
Keywords Ammonia; Constructed wetland; Juncus effusus; Laboratory-scale reactor; Sulphur cycle; Wastewater treatment
Abstract Sulphur cycling and its correlation to removal processes under dynamic redox conditions in the rhizosphere of helophytes in treatment wetlands are poorly understood. Therefore, long-term experiments were performed in laboratory-scale constructed wetlands treating artificial domestic wastewater in order to investigate the dynamics of sulphur compounds, the responses of plants and nitrifying microorganisms under carbon surplus conditions, and the generation of methane.For carbon surplus conditions (carbon:sulphate of 2.8:1) sulphate reduction happened but was repressed, in contrast to unplanted filters mentioned in literature.Doubling the carbon load caused stable and efficient sulphate reduction, rising of pH, increasing enrichment of S2- and S0 in pore water, and finally plant death and inhibition of nitrification by sulphide toxicity.The data show a clear correlation of the occurrence of reduced S-species with decreasing C and N removal performance and plant viability in the experimental constructed wetlands.In an experimental constructed wetland a clear correlation of the occurrence of reduced S-species with decreasing C and N removal performance and plant viability was observed.
ID 1572
Persistent UFZ Identifier http://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=1572
Wießner, A., Kuschk, P., Jechorek, M., Seidel, H., Kästner, M. (2008):
Sulphur transformation and deposition in the rhizosphere of Juncus effusus in a laboratory-scale constructed wetland
Environ. Pollut. 155 (1), 125 - 131