Publication Details

Category Text Publication
Reference Category Journals
DOI 10.1260/095830503322364449
Title (Primary) Restoration of open pit lignite mining in the former GDR: lessons to be learnt from Zwenkau
Author Wiegand, U.; Schreck, P.; Schreiter, P.; Lerche, I.; Gläßer, W.
Source Titel Energy & Environment
Year 2003
Department HDG
Volume 14
Issue 4
Page From 437
Page To 449
Language englisch
Abstract

The interactions have been investigated between the near-surface sediments of the sediment dumping at the Zwenkau open pit (used for extraction of lignite) and the produced mining water. These environmental impacts are the legacy of the energy policy of the former GDR. The pyrite oxidation that takes place in the overburden sediments causes the formation of an oxidation front and the pH-value of sediments falls to about 2 to 3 very soon after deposition. The primary mineral contents are destroyed and a considerable number of elements are mobilized that remain locally in the sediment pores. Because of the very weak seepage, rainfall remains in the alluvial areas as dump lakes. The dump lakes are very acidic because the rainwater transports the mobilized elements from the surface. Autochthonous and allochthonous formations of secondary minerals have been observed and analysed. A continuously ongoing interaction of exogenous and endogenous effects hinders the hydrological and geochemical equilibrium stabilisation. What to do with such a "moonscape" is considered in the conclusions.

Persistent UFZ Identifier https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=5303
Wiegand, U., Schreck, P., Schreiter, P., Lerche, I., Gläßer, W. (2003):
Restoration of open pit lignite mining in the former GDR: lessons to be learnt from Zwenkau
Energy & Environment 14 (4), 437 - 449 10.1260/095830503322364449