Metal‐phytoplankton interactions: Modeling the effect of competing ions (H+, Ca2+, and Mg2+) on uranium uptake

Fortin, Claude; Denison, Frank H.; Garnier‐Laplace, Jacqueline

doi:10.1897/06-298r.1

Cited by 70 publications

(54 citation statements)

References 39 publications

(58 reference statements)

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“…However the details around how water chemistry (e.g. pH) affects ionisation which in turn modulates the amount of uranyl ion (thought to be the most bioavailable (Fortin et al, 2007)) has not been addressed in this study. Natural extensions can be built to deal with water chemistry for operational purposes (Kooijman, 2010, Chap.6).…”

Section: Deviations From the Extended One Compartment Toxico-kinetic mentioning

confidence: 99%

“…Unfortunately, many toxicity tests concern organisms at particular life stages and experiment duration may be short relative to total lifespan meaning that our method must be able to extrapolate effects across life stages. An additional complex issue for extrapolation purposes is accounting for the relationship between U speciation and water hardness and pH in combination with toxic effects (Fortin et al, 2004(Fortin et al, , 2007.…”

Section: Introductionmentioning

confidence: 99%

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Effects of uranium on the metabolism of zebrafish, Danio rerio

et al. 2012

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The increasing demand for nuclear energy results in heightened levels of uranium (U) in aquatic systems which present a potential health hazard to resident organisms. The aim of this study was to mechanistically assess how chronic exposure to environmentally relevant concentrations of U perturbs the complex interplay between feeding, growth, maintenance, maturation and reproduction throughout the life-cycle of an individual. To this end we analysed literature-based and original zebrafish toxicity data within a same mass and energy balancing conceptual framework. U was found to increase somatic maintenance leading to inhibition of spawning as well as increase hazard rate and costs for growth during the early life stages. The fish's initial conditions and elimination through reproduction greatly affected toxico-kinetics and effects. We demonstrate that growth and reproduction should be measured on specific individuals since mean values were hardly interpretable. The mean food level differed between experiments, conditions and individuals. This last 'detail' contributed substantially to the observed variability by its combined effect on metabolism, toxic effects and toxico-kinetics. The significance of this work is that we address exactly how these issues are related and derive conclusions which are independent of experimental protocol and coherent with a very large body of literature on zebrafish eco-physiology.

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Section: Deviations From the Extended One Compartment Toxico-kinetic mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effects of uranium on the metabolism of zebrafish, Danio rerio

et al. 2012

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“…However, none of these isolates could remove any uranium from test solutions at pH>7. Above pH 7, the uranyl ions form stable and soluble complexes with carbonates and phosphates (Fortin et al, 2007). The uranium ore-bearing sites chosen for our studies consist of acidic soils contaminated with heavy metals and radionuclides.…”

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confidence: 99%

Isolation and analyses of uranium tolerant Serratia marcescens strains and their utilization for aerobic uranium U(VI) bioadsorption

2011

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Enrichment-based methods targeted at uranium-tolerant populations among the culturable, aerobic, chemo-heterotrophic bacteria from the subsurface soils of Domiasiat (India's largest sandstone-type uranium deposits, containing an average ore grade of 0.1 % U(3)O(8)), indicated a wide occurrence of Serratia marcescens. Five representative S. marcescens isolates were characterized by a polyphasic taxonomic approach. The phylogenetic analyses of 16S rRNA gene sequences showed their relatedness to S. marcescens ATCC 13880 (≥99.4% similarity). Biochemical characteristics and random amplified polymorphic DNA profiles revealed significant differences among the representative isolates and the type strain as well. The minimum inhibitory concentration for uranium U(VI) exhibited by these natural isolates was found to range from 3.5-4.0 mM. On evaluation for their uranyl adsorption properties, it was found that all these isolates were able to remove nearly 90-92% (21-22 mg/L) and 60-70% (285-335 mg/L) of U(VI) on being challenged with 100 μM (23.8 mg/L) and 2 mM (476 mg/L) uranyl nitrate solutions, respectively, at pH 3.5 within 10 min of exposure. his capacity was retained by the isolates even after 24 h of incubation. Viability tests confirmed the tolerance of these isolates to toxic concentrations of soluble uranium U(VI) at pH 3.5. This is among the first studies to report uranium-tolerant aerobic chemoheterotrophs obtained from the pristine uranium ore-bearing site of Domiasiat.

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“…Reproductive and UO 2 OH þ ions in the water [22,23], reducing the probability of uptake of U from the water.…”

Section: Discussionmentioning

confidence: 99%

Effects of dietary uranium on reproductive endpoints—fecundity, survival, reproductive success—of the fish Danio rerio

Simon

Mottin

Geffroy

et al. 2010

Enviro Toxic and Chemistry

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Exposure to metal-contaminated water has been shown to result in a number of reproductive abnormalities in adult and larvae fish, such as failure of oocyte maturation and teratogenic effects. Recently, dietary uptake of metals by fish has been recognized as a critical route of exposure, however, the mechanisms of metal uptake and toxicity are poorly understood and in need of further investigation. The objectives of the present study are to quantify uranium (U dietary transfers from spiked artificial diets) in Danio rerio tissues and embryos, as well as establish its effect on reproduction and embryonic development. Uranium's environmental prominence is currently increasing because of new mining and milling activities. Uranium concentrations range from 0.02 µg/L in natural waters to 2 mg/L. The focus of this study was to examine the trophic transfer and effects of U following exposure modalities (dose, exposure duration 1 to 20 d). Two different isotopes were used to distinguish between chemical and radioactivity toxicity of U. Results showed that U trophic transfer was low (0.52%). Uranium tissue distributions showed that accumulation occurred in digestive organs (liver, digestive tract) following dietary exposure. High levels of U were measured in the gonads (female in particular, >20% of relative burden). High U accumulation levels in eggs indicated maternal transfer of the contaminant. Moreover, U trophic exposure led to a reduction in reproduction success as a function of U accumulated levels. High U exposure conditions strongly reduced the total number of eggs (50%) and their viability at 10 d (reduction of the clutch number, low quality of eggs).

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Metal‐phytoplankton interactions: Modeling the effect of competing ions (H⁺, Ca²⁺, and Mg²⁺) on uranium uptake

Cited by 70 publications

References 39 publications

Effects of uranium on the metabolism of zebrafish, Danio rerio

Effects of uranium on the metabolism of zebrafish, Danio rerio

Isolation and analyses of uranium tolerant Serratia marcescens strains and their utilization for aerobic uranium U(VI) bioadsorption

Effects of dietary uranium on reproductive endpoints—fecundity, survival, reproductive success—of the fish Danio rerio

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