Download or read book Biogeochemical Characterization of a Constructed Wetland for Acid Mine Drainage Treatment written by Wendy Buell Gagliano and published by . This book was released on 2004 with total page 123 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Biogeochemical Characterization of a Constructed Wetland for Acid Mine Drainage Greatment written by Wendy Buell Gagliano and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: Drainage from abandoned coal mines has resulted in severe water quality problems. The oxidation of sulfide minerals in coal and associated rocks releases iron-rich, acidic solutions that damage vegetation and aquatic ecosystems. The objective of this study was to characterize the sediment column of an established compost wetland constructed for the treatment of acid mine drainage to gain insight into biogeochemical processes that might impact treatment efficiency. To do this, mineralogy and geochemical stability of ochreous sediments were examined, spatial and seasonal trends in porewater chemistry were measured, and bacterial community composition profiled. The mineralogical composition of the ochre portion of the sediment column was a mixture of schwertmannite [Fe8O8(OH)4.8(SO4)1.6] and goethite (a-FeOOH). Initial drainage conditions favored the precipitation of schwertmannite, which transformed at a rate of 10-30 mol/m3/yr to goethite. The sulfide minerals, pyrite (FeS2) and greigite (Fe3S4), were identified along with magnetite (Fe3O4) in the compost layer of the sediment. Vertical gradients in porewater chemistry were similar throughout the wetland system and, with the exception of dissolved sulfide concentration, no consistent seasonal trends were detected. Dissolved sulfide was elevated in the compost relative to the ochre and in June compared to February. Porewater pH ranged from 3 to 7 and increased with depth; whereas, the Eh ranged from 110 to 750 mV and decreased with depth. Both pH and Eh changed abruptly near the interface between the ochre and compost layers. Dissolved Fe occurred primarily as Fe(II) and peaked within the interface region. Concentrations of other major elements (Al, Ca, K, Mg, Mn, and Na) in the pore waters showed some variation between cells and sampling dates, but vertical gradients generally reflected wetland stratigraphy. Terminal restriction fragment length polymorphism analysis (T-RFLP) of 16S rRNA genes was used to profile bacterial community composition. Bacterial diversity was found to be similar throughout the sediment profile; however, bacterial communities clustered together and could be correlated to sediment properties. Many terminal restriction fragment's (TRF's) consistent with bacteria relevant to wetland treatment efficiency were found. These included multiple TRF's consistent with eight genera of sulfate-reducing bacteria as well as iron-reducers like Shewanella and Peleobacter.
Download or read book Biogeochemical Processes Occurring Within Constructed Wetlands for Treatment of Acid Mine Drainage written by Melinda N. Wallace and published by . This book was released on 1996 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Treatment of Contaminated Groundwater in a Constructed Wetland written by Jason D. Lach and published by . This book was released on 2004 with total page 228 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Mine Water Renovation in Wetland Environments written by Richard F. Unz and published by . This book was released on 1992 with total page 86 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Use of a Constructed Wetland for the Treatment of Acid Mine Drainage at the Friendship Hill National Historic Site Fayette County PA written by Robert S. Hedin and published by . This book was released on 1991 with total page 256 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Analysis and Optimization of Physical and Hydraulic Properties of Constructed Wetlands Substrates for Passive Treatment of Acid Mine Drainage written by Peter R. Lemke and published by . This book was released on 1989 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Analysis of Vertical Flow Wetlands in the Treatment of Acid Mine Drainage written by Jennifer L. Demchak and published by . This book was released on 1998 with total page 304 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Water Quality and Mineralogical Attributes of a Renovated Constructed Wetland Treating Acid Mine Drainage written by Christopher Douglas Barton and published by . This book was released on 1997 with total page 362 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Treatment of Mine Drainage by a Constructed Multi cell Wetland written by and published by . This book was released on 1994 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Role of Plants in the Treatment of Acid Mine Drainage Using Constructed Wetlands written by Rachel Louise Cox and published by . This book was released on 1998 with total page 188 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Water Quality and Substrate Analysis of an Acid Mine Drainage Treatment Wetland System written by Denae Athay and published by . This book was released on 2003 with total page 380 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Conf rences Les 16 17 Et 18 Septembre 1991 written by MEND (Canada) and published by MEND, 1991-[1992]. This book was released on 1991 with total page 624 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Microbial Ecological and Biogeochemical Processes in the Soil Vadose Zone Groundwater Habitats volume II written by Zifang Chi and published by Frontiers Media SA. This book was released on 2024-09-23 with total page 169 pages. Available in PDF, EPUB and Kindle. Book excerpt: Given the success of Volume I of this Research Topic, and how rapidly the subject area is evolving, we are pleased to announce the launch of Microbial Ecological and Biogeochemical Processes in the Soil-Vadose Zone-Groundwater Habitats, Volume II. You can check Volume I here: https://www.frontiersin.org/research-topics/37506/microbial-ecological-and-biogeochemical-processes-in-the-soil-vadose-zone-groundwater-habitats Microorganisms regulate biogeochemical cycles and serve various functions within the soil, vadose zone, and groundwater habitats. Microbial communities are sensitive to environmental changes and can respond to them rapidly. The composition and function of these microorganisms in different habitats can be influenced by biotic and abiotic factors, which affect biochemical processes and ecosystem functions. Therefore, to develop a healthy-stable-sustainable ecosystem, this research topic focuses on microbial ecological and biogeochemical processes in the soil-vadose zone-groundwater habitat.
Download or read book Constructed Wetlands for Acid Mine Drainage Treatment written by Emma Louise King and published by . This book was released on 2004 with total page 564 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Biomonitoring Study of a Constructed Wetland Site Treating Acid Mine Drainage written by Barbara Ramey (A.) and published by . This book was released on 1992 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Chemical and Biological Monitoring of a Constructed Wetland on Jones Branch Treating Acid Mine Drainage written by Barbara A. Ramey and published by . This book was released on 1995 with total page 152 pages. Available in PDF, EPUB and Kindle. Book excerpt:
