Details zur Publikation

Kategorie Textpublikation
Referenztyp Zeitschriften
DOI 10.1023/A:1019991326498
Titel (primär) Functions of straw for in situ remediation of acidic mining lakes
Autor Koschorreck, M.; Frömmichen, R.; Herzsprung, P.; Tittel, J.; Wendt-Potthoff, K.
Journal / Serie Water Air and Soil Pollution: Focus
Erscheinungsjahr 2002
Department SEEFO; GM
Band/Volume 2
Heft 3
Seite von 97
Seite bis 109
Sprache englisch
Abstract The addition of straw in combination with ‘Carbokalk’, a by-product from the sugar-industry, was successfully used to stimulate microbial alkalinity generation in an acidic mining lake. To get detailed information about functions of straw, anenclosure experiment was carried out. Straw bundles were placedat the sediment surface of an acidic mining lake (ML 111) and thephysiochemical conditions and the microbiology of the sediment-water contact zone were studied. Straw was degraded by anaerobic microorganisms and dissolved organic carbon (DOC) leached from straw bundles. Pigmented flagellates responded to the DOC supply in the water column anda considerable amount of algal carbon was transported to the sediment. Straw addition led to microbial reduction of iron andsulfate in the sediment. Sulfate reduction was observed at a pHof 5.5. The pH, however, was not high enough to precipitate H2S completely. Thus, some H2S diffused into the watercolumn, where it was reoxidized. Straw did not create orstabilize an anoxic water body above the sediment. Microbial sulfate reduction and pyrite formation only took place in the sediment,whereas iron reduction also took place in the straw. Straw, however, altered the flow conditions above the sediment surfaceand prevented complete mixing of the profundal water. Straw didnot serve as a substratum for a reactive biofilm. We conclude that the most important function of straw for mining lake remediation is to be a long-term nutrient source for microbialalkalinity generation in the sediment.
dauerhafte UFZ-Verlinkung
Koschorreck, M., Frömmichen, R., Herzsprung, P., Tittel, J., Wendt-Potthoff, K. (2002):
Functions of straw for in situ remediation of acidic mining lakes
Water Air Soil Poll.: Focus 2 (3), 97 - 109