Bicarbonate toxicity to Ceriodaphnia Dubia and the freshwater shrimp Paratya Australiensis and its influence on zinc toxicity

Carolina Vera, Ross Hyne, Ron Patra, Sunderam Ramasamy, Fleur Pablo, Moreno Julli, Ben KEFFORD

    Research output: Contribution to journalArticle

    13 Citations (Scopus)

    Abstract

    Bicarbonate is often a major ionic constituent associated with produced waters from methane gas extraction and coal mining, yet few studies have determined its specific toxicity. Currently, the environmental risk of bicarbonate anion in water discharges is assessed based on the toxicity of sodium chloride or artificial seawater and is regulated via electrical conductivity. Increased NaHCO3 added to Ceriodaphnia dubia in synthetic or natural water gave similar 48-h 10% effective concentration (EC10) values of 1750125 mg NaHCO3/L (meanstandard error) and 1670180 mg NaHCO3/L, respectively. Bicarbonate was toxic to C. dubia in both waters with conductivities above 1900mS/cm. In contrast, when conductivity was elevated with NaCl, toxicity to C. dubia was observed only above 2800 mS/cm. Bicarbonate also impaired C. dubia reproduction with an EC10 of 340 mg NaHCO3/L. Major ion composition also influenced Zn bioavailability, a common co-occurring metal contaminant in coal mine waters, with sublethal concentrations of NaHCO3 and elevated pH increasing Zn toxicity. Higher pH was the dominant parameter determining a 10-fold increase in the 48-h 50% effective concentration (EC50) for Zn toxicity to C. dubia at pH 8.6 of 34 mg Zn/L (95% confidence limit¼32–37 mg Zn/L) compared with the Zn toxicity at approximately circumneutral pH. Exposure of the freshwater shrimp Paratya australiensis (Atyidae) in natural water to increasing bicarbonate gave a mean 10-d 10% lethal concentration (LC10) of 850115 mg NaHCO3/L, associated with a mean conductivity EC10 of 1145 mS/cm, which is considerably lower than toxicity of NaCl and artificial seawater to this species reported elsewhere. Because toxicity was influenced by salt composition, specific ions should be regulated rather than conductivity alone in mine wastewater discharges.
    Original languageEnglish
    Pages (from-to)1179-1186
    Number of pages8
    JournalEnvironmental Toxicology and Chemistry
    Volume33
    Issue number5
    DOIs
    Publication statusPublished - 2014

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    Bicarbonates
    Fresh Water
    bicarbonate
    Toxicity
    Zinc
    zinc
    toxicity
    Water
    conductivity
    Seawater
    Coal Mining
    Coal mines
    water
    Ions
    Electric Conductivity
    Coal
    Poisons
    Methane
    Waste Water
    seawater

    Cite this

    Vera, Carolina ; Hyne, Ross ; Patra, Ron ; Ramasamy, Sunderam ; Pablo, Fleur ; Julli, Moreno ; KEFFORD, Ben. / Bicarbonate toxicity to Ceriodaphnia Dubia and the freshwater shrimp Paratya Australiensis and its influence on zinc toxicity. In: Environmental Toxicology and Chemistry. 2014 ; Vol. 33, No. 5. pp. 1179-1186.
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    abstract = "Bicarbonate is often a major ionic constituent associated with produced waters from methane gas extraction and coal mining, yet few studies have determined its specific toxicity. Currently, the environmental risk of bicarbonate anion in water discharges is assessed based on the toxicity of sodium chloride or artificial seawater and is regulated via electrical conductivity. Increased NaHCO3 added to Ceriodaphnia dubia in synthetic or natural water gave similar 48-h 10{\%} effective concentration (EC10) values of 1750125 mg NaHCO3/L (meanstandard error) and 1670180 mg NaHCO3/L, respectively. Bicarbonate was toxic to C. dubia in both waters with conductivities above 1900mS/cm. In contrast, when conductivity was elevated with NaCl, toxicity to C. dubia was observed only above 2800 mS/cm. Bicarbonate also impaired C. dubia reproduction with an EC10 of 340 mg NaHCO3/L. Major ion composition also influenced Zn bioavailability, a common co-occurring metal contaminant in coal mine waters, with sublethal concentrations of NaHCO3 and elevated pH increasing Zn toxicity. Higher pH was the dominant parameter determining a 10-fold increase in the 48-h 50{\%} effective concentration (EC50) for Zn toxicity to C. dubia at pH 8.6 of 34 mg Zn/L (95{\%} confidence limit¼32–37 mg Zn/L) compared with the Zn toxicity at approximately circumneutral pH. Exposure of the freshwater shrimp Paratya australiensis (Atyidae) in natural water to increasing bicarbonate gave a mean 10-d 10{\%} lethal concentration (LC10) of 850115 mg NaHCO3/L, associated with a mean conductivity EC10 of 1145 mS/cm, which is considerably lower than toxicity of NaCl and artificial seawater to this species reported elsewhere. Because toxicity was influenced by salt composition, specific ions should be regulated rather than conductivity alone in mine wastewater discharges.",
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    Bicarbonate toxicity to Ceriodaphnia Dubia and the freshwater shrimp Paratya Australiensis and its influence on zinc toxicity. / Vera, Carolina; Hyne, Ross; Patra, Ron; Ramasamy, Sunderam; Pablo, Fleur; Julli, Moreno; KEFFORD, Ben.

    In: Environmental Toxicology and Chemistry, Vol. 33, No. 5, 2014, p. 1179-1186.

    Research output: Contribution to journalArticle

    TY - JOUR

    T1 - Bicarbonate toxicity to Ceriodaphnia Dubia and the freshwater shrimp Paratya Australiensis and its influence on zinc toxicity

    AU - Vera, Carolina

    AU - Hyne, Ross

    AU - Patra, Ron

    AU - Ramasamy, Sunderam

    AU - Pablo, Fleur

    AU - Julli, Moreno

    AU - KEFFORD, Ben

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    AB - Bicarbonate is often a major ionic constituent associated with produced waters from methane gas extraction and coal mining, yet few studies have determined its specific toxicity. Currently, the environmental risk of bicarbonate anion in water discharges is assessed based on the toxicity of sodium chloride or artificial seawater and is regulated via electrical conductivity. Increased NaHCO3 added to Ceriodaphnia dubia in synthetic or natural water gave similar 48-h 10% effective concentration (EC10) values of 1750125 mg NaHCO3/L (meanstandard error) and 1670180 mg NaHCO3/L, respectively. Bicarbonate was toxic to C. dubia in both waters with conductivities above 1900mS/cm. In contrast, when conductivity was elevated with NaCl, toxicity to C. dubia was observed only above 2800 mS/cm. Bicarbonate also impaired C. dubia reproduction with an EC10 of 340 mg NaHCO3/L. Major ion composition also influenced Zn bioavailability, a common co-occurring metal contaminant in coal mine waters, with sublethal concentrations of NaHCO3 and elevated pH increasing Zn toxicity. Higher pH was the dominant parameter determining a 10-fold increase in the 48-h 50% effective concentration (EC50) for Zn toxicity to C. dubia at pH 8.6 of 34 mg Zn/L (95% confidence limit¼32–37 mg Zn/L) compared with the Zn toxicity at approximately circumneutral pH. Exposure of the freshwater shrimp Paratya australiensis (Atyidae) in natural water to increasing bicarbonate gave a mean 10-d 10% lethal concentration (LC10) of 850115 mg NaHCO3/L, associated with a mean conductivity EC10 of 1145 mS/cm, which is considerably lower than toxicity of NaCl and artificial seawater to this species reported elsewhere. Because toxicity was influenced by salt composition, specific ions should be regulated rather than conductivity alone in mine wastewater discharges.

    KW - Bicarbonate

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    KW - Alkalinity

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    KW - Major ions

    KW - Salinity.

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