Controls on the nature and distribution of an alga in coal mine-waste environments and its potential impact on water quality

Brake, Sandra S.; Dannelly, H. Kathleen; Connors, Katherine A.

doi:10.1007/s002540000181

Cited by 57 publications

(27 citation statements)

References 15 publications

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“…First, it has been shown that the 'oversaturation' in dissolved oxygen (that is, 4200% saturation with the atmosphere) facilitates inorganic co-precipitation of arsenic and iron colloids (Brake et al, 2001a(Brake et al, , 2001b. Second, an increased concentration in dissolved oxygen may favor the development of aerobic species such as Thiomonas or Acidothiobacillus spp., both known to be dominant and involved in the bio-attenuation processes at the Carnoulès AMD Duquesne et al, 2003;Bertin et al, 2011).…”

Section: Discussionmentioning

confidence: 99%

“…It has been described as a part of the eukaryotic microbial community in peat bogs (Pentecost, 1982), volcanic lakes (Sittenfeld et al, 2002) and acid mine drainages (AMDs) (Casiot et al, 2004a), and is considered as a bio-indicator of these latter ecosystems (Brake et al, 2001a(Brake et al, , 2001b. AMDs exposed environments are usually considered very toxic to biota as they are characterized, besides low pH values, by very high concentrations of metallic compounds (Leblanc et al, 1996).…”

Section: Introductionmentioning

confidence: 99%

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In situ proteo-metabolomics reveals metabolite secretion by the acid mine drainage bio-indicator, Euglena mutabilis

et al. 2012

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Euglena mutabilis is a photosynthetic protist found in acidic aquatic environments such as peat bogs, volcanic lakes and acid mine drainages (AMDs). Through its photosynthetic metabolism, this protist is supposed to have an important role in primary production in such oligotrophic ecosystems. Nevertheless, the exact contribution of E. mutabilis in organic matter synthesis remains unclear and no evidence of metabolite secretion by this protist has been established so far. Here we combined in situ proteo-metabolomic approaches to determine the nature of the metabolites accumulated by this protist or potentially secreted into an AMD. Our results revealed that the secreted metabolites are represented by a large number of amino acids, polyamine compounds, urea and some sugars but no fatty acids, suggesting a selective organic matter contribution in this ecosystem. Such a production may have a crucial impact on the bacterial community present on the study site, as it has been suggested previously that prokaryotes transport and recycle in situ most of the metabolites secreted by E. mutabilis. Consequently, this protist may have an indirect but important role in AMD ecosystems but also in other ecological niches often described as nitrogen-limited.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

In situ proteo-metabolomics reveals metabolite secretion by the acid mine drainage bio-indicator, Euglena mutabilis

et al. 2012

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“…Coexistence and synergistic relationships among the multi-species microbial community of the biofilm protect them from environmental stresses and enable them to survive under the extreme conditions of AMD (Aguilera et al 2007(Aguilera et al , 2010Levings et al 2005). The significant role of these microorganisms in AMD is their natural cleansing ability for removing heavy metals through different functions including bioaccumulation, biosorption and biomineralisation (Das et al 2009b;Singh et al 2006;Malkoc and Nuhoglu 2003;Niyogi et al 2002;Brake et al 2001). Aguilera et al (2010Aguilera et al ( , 2007Aguilera et al ( , 2006b) studied eukaryotic biofilms in extremely acidic river, Rio Tinto, in Spain.…”

Section: Introductionmentioning

confidence: 91%

Biosorption of heavy metals in a photo-rotating biological contactor—a batch process study

Orandi

Lewis

2012

Appl Microbiol Biotechnol

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Metal removal potential of indigenous mining microorganisms from acid mine drainage (AMD) has been well recognised in situ at mine sites. However, their removal capacity requires to be investigated for AMD treatment. In the reported study, the capacity of an indigenous AMD microbial consortium dominated with Klebsormidium sp., immobilised in a photo-rotating biological contactor (PRBC), was investigated for removing various elements from a multi-ion synthetic AMD. The synthetic AMD was composed of major (Cu, Mn, Mg, Zn, Ca, Na, Ni) and trace elements (Fe, Al, Cr, Co, Se, Ag, Mo) at initial concentrations of 2 to 100 mg/L and 0.005 to 1 mg/L, respectively. The PRBC was operated for two 7-day batch periods under pH conditions of 3 and 5. The maximum removal was observed after 3 and 6 days at pH 3 and 5, respectively. Daily water analysis data demonstrated the ability of the algal-microbial biofilm to remove an overall average of 25-40 % of the major elements at pH 3 in the order of Na > Cu > Ca > Mg > Mn > Ni > Zn, whereas a higher removal (35-50 %) was observed at pH 5 in the order of Cu > Mn > Mg > Ca > Ni > Zn > Na. The removal efficiency of the system for trace elements varied extensively between 3 and 80 % at the both pH conditions. The batch data results demonstrated the ability for indigenous AMD algal-microbial biofilm for removing a variety of elements from AMD in a PRBC. The work presents the potential for further development and scale-up to use PBRC inoculated with AMD microorganisms at mine sites for first or secondary AMD treatment.

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“…low pH, high dissolved solids) of AMD-impacted systems, phototrophic microeukaryotes may be the only photosynthetic organisms capable of surviving in such systems (Brake et al 2001a(Brake et al , 2004Rowe et al 2007). As such, these organisms may represent the primary sources or organic carbon in AMD-impacted systems (Rowe et al 2007).…”

Section: Environmental Implicationsmentioning

confidence: 98%

“…Photosynthetic microeukaryotes, including green algae, euglenoids, and diatoms are commonly encountered in AMD systems, and their activities may produce O 2 concentrations as high as 21 mg/L (Brake et al 2001a(Brake et al , b, 2004Sanchez-España et al 2007). From the perspective of stimulating oxidative precipitation of Fe from AMD, the activities of these organisms may be considered beneficial since they provide more O 2 for FeOB than could be achieved by passive diffusion of atmospheric O 2 alone.…”

Section: Introductionmentioning

confidence: 98%

The Influence of Phototrophic Biomass on Fe and S Redox Cycling in an Acid Mine Drainage-Impacted System

et al. 2010

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We examined the effects of organic carbon from oxygenic photosynthetic algal biomass on the redox cycling of Fe and S in an acid mine drainage (AMD)-impacted system. Fe(III)-rich sediments from the field site with abundant algae contained fewer Fe(II) oxidizing bacteria and lower rates of Fe(II) oxidation compared to sediments that did not contain abundant algae. The addition of algal biomass to sediments that did not previously contain abundant algae inhibited microbiological Fe(II) oxidation and enhanced microbiological Fe(III) and sulfate reduction. As Fe(III) reduction proceeded, sulfate was released into solution due to the reductive solubilization of Fe(III) (hydr)oxy-sulfate phases. Our results indicate that in systems where oxidative precipitation of Fe is exploited as an AMD treatment strategy, the abundant organic carbon provided by photosynthetic organisms may inhibit or reverse Fe(II) oxidation.

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Controls on the nature and distribution of an alga in coal mine-waste environments and its potential impact on water quality

Cited by 57 publications

References 15 publications

In situ proteo-metabolomics reveals metabolite secretion by the acid mine drainage bio-indicator, Euglena mutabilis

In situ proteo-metabolomics reveals metabolite secretion by the acid mine drainage bio-indicator, Euglena mutabilis

Biosorption of heavy metals in a photo-rotating biological contactor—a batch process study

The Influence of Phototrophic Biomass on Fe and S Redox Cycling in an Acid Mine Drainage-Impacted System

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