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Scholz, M. |
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Title |
Performance comparison of experimental constructed wetlands with different filter media and macrophytes treating industrial wastewater contaminated with lead and copper |
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Journal Article |
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2002 |
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Bioresource Technology |
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83 |
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2 |
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71-79 |
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Keywords |
mine water treatment |
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Abstract  |
The aim of this study was to investigate the treatment efficiency of passive vertical-flow wetland filters containing different macrophytes (Phragmites and/or Typha) and granular media with different adsorption capacities. Gravel, sand, granular activated carbon, charcoal and Filtralite (light expanded clay) were used as filter media. Different concentrations of lead and copper sulfate were added to polluted urban stream inflow water to simulate pretreated mine wastewater. The relationships between growth media, microbial and plant communities as well as the reduction of predominantly lead, copper and five-day biochemical oxygen demand (BOD5) were investigated. An analysis of variance showed that concentration reductions (mg 1(-1)) of lead, copper and BOD5 were significantly similar for the six experimental wetlands. Microbial diversity was low due to metal pollution and similar for all filters. There appears to be no additional benefit in using adsorption media and macrophytes to enhance biomass performance during the first 10 months of operation. (C) 2002 Elsevier Science Ltd. All rights reserved. |
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Performance comparison of experimental constructed wetlands with different filter media and macrophytes treating industrial wastewater contaminated with lead and copper; Wos:000175574600001; Times Cited: 5; ISI Web of Science |
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CBU @ c.wolke @ 17031 |
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121 |
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Author |
Lee, B.H. |
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Title |
Constructed wetlands: Treatment of concentrated storm water runoff (Part A) |
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Journal Article |
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Year |
2006 |
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Environmental Engineering Science |
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23 |
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2 |
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320-331 |
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mine water treatment |
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Abstract |
The aim of this research was to assess the treatment efficiencies for gully pot liquor of experimental vertical-flow constructed wetland filters containing Phragmites australis (Cav.) Trin. ex Steud. (common reed) and filter media of different adsorption capacities. Six out of 12 filters received inflow water spiked with metals. For 2 years, hydrated nickel and copper nitrate were added to sieved gully pot liquor to simulate contaminated primary treated storm runoff. For those six constructed wetland filters receiving heavy metals, an obvious breakthrough of dissolved nickel was recorded after road salting during the first winter. However, a breakthrough of nickel was not observed, since the inflow pH was raised to eight after the first year of operation. High pH facilitated the formation of particulate metal compounds such as nickel hydroxide. During the second year, reduction efficiencies of heavy metal, 5-days at 20 degrees C N-Allylthiourea biochemical oxygen demand (BOD) and suspended solids (SS) improved considerably. Concentrations of BOD were frequently < 20 mg/L. However, concentrations for SS were frequently > 30 mg/L. These are the two international thresholds for secondary wastewater treatment. The BOD removal increased over time due to biomass maturation, and the increase of pH. An analysis of the findings with case-based reasoning can be found in the corresponding follow-up paper (Part B). |
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Constructed wetlands: Treatment of concentrated storm water runoff (Part A); Wos:000236600700007; Times Cited: 0; ISI Web of Science |
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CBU @ c.wolke @ 16932 |
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112 |
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Olaniran, A.O. |
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Title |
Biostimulation and bioaugmentation enhances aerobic biodegradation of dichloroethenes |
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Journal Article |
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2006 |
Publication |
Chemosphere |
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63 |
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4 |
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600-608 |
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mine water treatment |
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The accumulation of dichloroethenes (DCEs) as dominant products of microbial reductive dechlorination activity in soil and water represent a significant obstacle to the application of bioremediation as a remedial option for chloroethenes in many contaminated systems. In this study, the effects of biostimulation and/or bioaugmentation on the biodegradation of cis- and trans-DCE in soil and water samples collected from contaminated sites in South Africa were evaluated in order to deter-mine the possible bioremediation option for these compounds in the contaminated sites. Results from this study indicate that cis- and trans-DCE were readily degraded to varying degrees by natural microbial populations in all the soil and water samples tested, with up to 44% of cis-DCE and 41% of trans-DCE degraded in the untreated soil and water samples in two weeks. The degradation rate constants ranged significantly (P < 0.05) between 0.0938 and 0.560 wk(-1) and 0.182 and 0.401 wk(-1), for cis- and trans-DCE, respectively, for the various treatments employed. A combination of biostimulation and bioaugmentation significantly increased the biodegradation of both compounds within two weeks; 14% for cis-DCE and 18% for trans-DCE degradation, above those observed in untreated soil and water samples. These findings support the use of a combination of biostimulation and bioaugmentation for the efficient biodegradation of these compounds in contaminated soil and water. In addition, the results clearly demonstrate that while naturally occurring microorganisms are capable of aerobic biodegradation of cis- and trans-DCE, biotransformation may be affected by several factors, including isomer structure, soil type, and the amount of nutrients available in the water and soil. (c) 2005 Elsevier Ltd. All rights reserved. |
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Biostimulation and bioaugmentation enhances aerobic biodegradation of dichloroethenes; Wos:000237379500007; Times Cited: 0; ISI Web of Science |
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CBU @ c.wolke @ 16936 |
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111 |
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Matlock, M.M.; Howerton, B.S.; Atwood, D.A. |
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Chemical precipitation of heavy metals from acid mine drainage |
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Journal Article |
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2002 |
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Water Res |
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36 |
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19 |
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4757-4764 |
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mine water treatment BDET Acid mine drainage Water treatment Remediation Heavy metals Chemical precipitation Mercury Iron |
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The 1,3-benzenediamidoethanethiol dianion (BDET, known commercially as MetX) has been developed to selectively and irreversibly bind soft heavy metals from aqueous solution. In the present study BDET was found to remove >90% of several toxic or problematic metals from AMD samples taken from an abandoned mine in Pikeville, Kentucky. The concentrations of metals such as iron, may be reduced at pH 4.5 from 194 ppm to below 0.009 ppm. The formation of stoichiomietric BDET-metal precipitates in this process was confirmed using X-ray powder diffraction (XRD), proton nuclear magnetic resonance (1H NMR), and infrared spectroscopy (IR). |
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0043-1354 |
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Nov.; Chemical precipitation of heavy metals from acid mine drainage; file:///C:/Dokumente%20und%20Einstellungen/Stefan/Eigene%20Dateien/Artikel/15005.pdf; Science Direct |
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CBU @ c.wolke @ 15005 |
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48 |
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Author |
Rajaram, V. |
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Title |
Methodology for estimating the costs of treatment of mine drainage |
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Journal Article |
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2001 |
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Proceedings of the Seventeenth International Mining Congress and Exhibition of Turkey |
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191-201 |
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mine water treatment |
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Tetra Tech developed worksheets for the U.S. Department of the Interior, Office of Surface Mining (OSM) to allow a consistent, accurate, and rapid method of estimating the costs of long-term treatment of mine drainage at coal mines, in accordance with the Surface Mining Control and Reclamation Act (SMCRA) of 1977. This paper describes the rationale for the worksheets and how they can be used to calculate costs for site-specific conditions. Decision trees for selection of alternative treatments for acidic or alkaline mine drainage are presented. |
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Methodology for estimating the costs of treatment of mine drainage; Isip:000171428500021; Times Cited: 0; ISI Web of Science |
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Call Number |
CBU @ c.wolke @ 17065 |
Serial |
163 |
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