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Title (Primary) Effectiveness of various small-scale constructed wetland designs for the removal of iron and zinc from acid mine drainage under field conditions
Author Wießner, A.; Kuschk, P.; Buddhawong, S.; Stottmeister, U.; Mattusch, J.; Kästner, M.;
Journal Engineering in Life Sciences
Year 2006
Department UBT; ANA; UBT_alt;
Volume 6
Issue 6
Language englisch;
Keywords Bioremediation; Contaminated water; Phytoremediation
Abstract A system of planted and unplanted small-scale subsurface flow (SSF) and surface flow (SF) constructed wetlands together with hydroponic systems (HP) were installed to compare the removal efficiencies of Fe and Zn from acid mine drainage (AMD) under long-term field conditions. Maximum removal of 94–97 % (116–142 mg/m2 d) for Fe and 69–77 % (6.2–7.9 mg/m2 d) for Zn was calculated for the planted soil systems. The planted SSF was most sensitive to heavy rain fall. Short-term increases of the metal concentration in the outflows, short-term breakdowns of the Fe removal and continual long-term breakdowns of the Zn removal were observed. In contrast to Zn removal, all wetland types are applicable for Fe removal with maximum removal in the range of 60–98 %. Most of the removed Fe and Zn was transformed and deposited inside the soil bed. The amount absorbed by the plants (0.03 to 0.3 %) and gravel-associated soil beds (0.03 to 1.7 %) of the total input were low for both metals. The response of the planted SSF to rainfall suggests a remobilization of metals accumulated inside the rhizosphere and the importance of buffering effects of the surface water layers of SF systems. The importance of plants for metal removal was shown.
ID 3127
Persistent UFZ Identifier https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=3127
Wießner, A., Kuschk, P., Buddhawong, S., Stottmeister, U., Mattusch, J., Kästner, M. (2006):
Effectiveness of various small-scale constructed wetland designs for the removal of iron and zinc from acid mine drainage under field conditions
Eng. Life Sci. 6 (6), 584 - 592