Direct toxicity assessment with a mini portable respirometer

Tzoris, Achilles; Fernández‐Pérez, Virginia; Hall, Elizabeth A. H.

doi:10.1016/j.snb.2004.02.034

Cited by 19 publications

(10 citation statements)

References 18 publications

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“…Addition of mg L −1 concentrations of essential cations, such as Mn 2+ or Zn 2+ , have been reported to boost bacterial populations and the reductive dissolution of ≡Fe(O)OH phases in sediment. Such stimulatory effects are common in microbial toxicity assays (Stebbing, 1981;Tzoris et al, 2005). However, the bacterially mediated production of porewater Fe(II) via reduction of ≡Fe(O)OH is likely to be dependent not only on the type and concentration of added metal, but also on the availability of oxidizable OC, concentrations and types (amorphous or crystalline) of MnO 2 and ≡Fe(O)OH present, the pH, the particular microbial assembly, as well as the Fe(II)-binding phases available following the reduction of ≡Fe(O)OH to Fe(II).…”

Section: Influence Of Spiked-metal Concentration On Iron Chemistrymentioning

confidence: 99%

The Effect of Sediment Type and pH-Adjustment on the Porewater Chemistry of Copper- and Zinc-Spiked Sediments

Hutchins

Teasdale

Lee

et al. 2008

Soil and Sediment Contamination: An International Journal

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The spiking of metals into sediments lowers pH, raises the oxidative state, and exacerbates the partitioning of Fe, Mn, and spiked metal to the porewater. This study reports the geochemical response of three sediments of varying metal-binding capacity to Cu-/Zn-additions and the influence of pH-adjustment on the major metal-partitioning processes. The increase in redox potential and porewater metal concentrations observed in metal-spiked sediment was minimized by sediment neutralization to pH 7 irrespective of sediment type. In the presence of minimal sulfide concentrations, porewater metal concentrations suggested a greater affinity of copper for organic carbon than zinc, which was thought more dependent on iron oxyhydroxide phases. The amount of iron in the porewater of metal-spiked pH adjusted sediment was, in turn, affected by the type and concentration of spiked metal in the porewater. Increasing porewater concentrations of copper and zinc corresponded to decreasing and increasing porewater iron concentrations, respectively. Porewater copper appeared to act as a toxicant of Fe(III) reducing bacteria, while porewater zinc is thought to have had a stimulatory effect. The present study provides further insight on geochemical changes occurring to metal-spiked sediments and their implications for the interpretation of toxicity tests.

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Section: Influence Of Spiked-metal Concentration On Iron Chemistrymentioning

confidence: 99%

The Effect of Sediment Type and pH-Adjustment on the Porewater Chemistry of Copper- and Zinc-Spiked Sediments

Hutchins

Teasdale

Lee

et al. 2008

Soil and Sediment Contamination: An International Journal

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“…This technology has good reproducibility and comparable responses with methods using microorganisms and other assays that have been reported in the literature. (63) …”

Section: Microbial Biosensor Typesmentioning

confidence: 99%

Microbial Biosensors for Environmental Monitoring and Food Analysis

Ying

2011

Food Reviews International

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A microbial biosensor is an elaborate analytic device that uses microorganisms as recognition elements, mainly for application in environmental monitoring, food safety, military defense, and medicine. The selection and immobilization of microorganisms are key steps that must first be addressed for microbial biosensors. Currently, genetically modified microorganisms play an increasingly significant role in improving the capacity of biosensors. Electrochemical and optical types of transducers have been widely employed in microbial biosensors, although bioluminescence and fluorescence methods have been highlighted recently. Additionally, the microbial fuel cell (MFC), which has been mainly applied in biological oxygen demand (BOD) biosensors, is a promising technology. This article reviews recent developments of microbial biosensors with respect to their applications in environmental monitoring and food analysis, including measurement of a variety of common pollutants, products in fermenting processes, antibiotic residues, and toxins in food. Current limitations and prospective future directions, such as performance optimization, developing portable biosensors for on-site monitoring, combination of genetic and DNA approaches, nanotechnology, and phage-based biosensors for foodborne pathogens, are also discussed in this review.

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“…Microbial bioassays have many advantages for the detection of toxic substances because they are inexpensive, readily available, easily reproducible and produce a quick response towards toxic substances (Tzoris et al . ; Girotti et al . ).…”

Section: Introductionmentioning

confidence: 99%

“…Numerous methods have been developed and applied to living organisms such as fish, algae, daphnids, plant cells, animal cells and several bac-bs_bs_banner terial species to assess the toxicity of wastewater samples (Sponza 2003;Girotti et al 2008;Palma et al 2009). Microbial bioassays have many advantages for the detection of toxic substances because they are inexpensive, readily available, easily reproducible and produce a quick response towards toxic substances (Tzoris et al 2005;Girotti et al 2008).…”

Section: Introductionmentioning

confidence: 99%

Assessing toxicities of industrial effluents and 1,4‐dioxane using sulphur‐oxidising bacteria in a batch test

Gurung

Kim

Joo

et al. 2011

Water & Environment J

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In this study, the qualities of the final effluents from nine different industries (A, B, C, D, E, F, G, H and I) discharging 1,4‐dioxane mainly as effluents were assessed using sulphur‐oxidising bacteria (SOB) as a test micro‐organism in batch mode. Results showed that effluent from industry ‘B’ was the most toxic of all the effluents tested, followed by E, C and A effluents. An EC50 value of 13% was obtained for effluent from B, whereas with E, C and A effluents, the EC50 values of 23%, 25% and 29% were found, respectively. Similarly, batch tests were performed in order to evaluate the potential for 1,4‐dioxane to inhibit growth on SOB. The lowest test concentration of 1,4‐dioxane (12 μg/L) resulted in 17% of inhibition of SOB, whereas the highest test concentration (3.125 mg/L) resulted in > 75% of the inhibition. An EC50 value of 0.105 mg/L was obtained for 1,4‐dioxane.

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Direct toxicity assessment with a mini portable respirometer

Cited by 19 publications

References 18 publications

The Effect of Sediment Type and pH-Adjustment on the Porewater Chemistry of Copper- and Zinc-Spiked Sediments

The Effect of Sediment Type and pH-Adjustment on the Porewater Chemistry of Copper- and Zinc-Spiked Sediments

Microbial Biosensors for Environmental Monitoring and Food Analysis

Assessing toxicities of industrial effluents and 1,4‐dioxane using sulphur‐oxidising bacteria in a batch test

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