Bioaccumulation of 137Cs and 57Co by five marine phytoplankton species

Heldal, Hilde Elise; Stupakoff, Ian; Fisher, Nicholas S.

doi:10.1016/s0265-931x(01)00020-0

Cited by 32 publications

(20 citation statements)

References 7 publications

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“…The non-phosphorylated cyanobacterial and Laminaria biomasses removed smaller amounts of the monovalent 134 Cs + than of the divalent cations 85 Sr ++ and 226 Ra ++ . Poor adsorption of 134 Cs by marine algae and picoplankton, in comparison with adsorption by divalent radionuclides, has also been reported by Fisher (1985), Boisson et al (1997), Heldal et al (2001) and Adam and Garnier-Laplace (2003). This is likely to be because the equilibrium constants of complexes of divalent cations with carboxylic acids are larger by orders of magnitude than those of monovalent cations (Pohlmeier, 1999).…”

Section: Discussionmentioning

confidence: 99%

Adsorption of Radionuclides (134Cs, 85Sr, 226Ra, 241Am) by Extracted Biomasses of Cyanobacteria (Nostoc Carneum, N. Insulare, Oscillatoria Geminata and Spirulina Laxis-Sima) and Phaeophyceae (Laminaria Digitata and L. Japonica; Waste Products from Alginate Production) at Different pH

Pohl

Schimmack

2006

J Appl Phycol

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The extracted biomasses of four cyanobacteria (Nostoc carneum, Nostoc insulare, Oscillatoria geminata, and Spirulina laxissima) grown in axenic mass cultures, and of four samples of Laminaria obtained from different locations (L. digitata I and II, France; L. japonica I and II, China; all waste products from alginate production) were tested for their ability to adsorb four radionuclides ( 134 Cs, 85 Sr, 226 Ra, and 241 Am) under different pH regimes. In addition, two of the cyanobacterial biomasses (N. carneum and O. geminata) and the four Laminaria biomasses were phosphorylated before being tested as radionuclide adsorbers. The non-phosphorylated cyanobacterial biomasses showed very low adsorption of 134 Cs but substantially higher removal of 85 Sr and 226 Ra, which increased with increasing pH. 241 Am was almost completely removed from the solution at low pH, but less at higher pH. After phosphorylation, removal of 134 Cs, 85 Sr and 226 Ra by the cyanobacterial biomasses was improved, particularly at lower pH, but there was almost no adsorption of 241 Am. The non-phosphorylated P. Pohl ( ) Laminaria biomasses showed good removal of 134 Cs and very good adsorption of 85 Sr and 226 Ra. Removal of 241 Am was high at low pH but decreased with increasing pH. After phosphorylation, adsorption of 134 Cs by Laminaria samples was slightly improved; removal of 85 Sr and 226 Ra was increased at low pH with a tendency towards decrease in adsorption with increasing pH; but almost no 241 Am was adsorbed. The origin of the cyanobacterial and Laminaria materials appeared to have little effect on the adsorption of the radionuclides.

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Section: Discussionmentioning

confidence: 99%

Adsorption of Radionuclides (134Cs, 85Sr, 226Ra, 241Am) by Extracted Biomasses of Cyanobacteria (Nostoc Carneum, N. Insulare, Oscillatoria Geminata and Spirulina Laxis-Sima) and Phaeophyceae (Laminaria Digitata and L. Japonica; Waste Products from Alginate Production) at Different pH

Pohl

Schimmack

2006

J Appl Phycol

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“…A 50 number of laboratory culture studies have quantified the extent to which radionuclides 51 concentrate in small planktonic assemblages including phytoplankton (Fisher, 1985(Fisher, , 1986Giesy 52 and Paine, 1977;Heldal et al, 2001;Sakaguchi et al, 1978). However, field studies have been…”

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confidence: 99%

“…Dynamic modeling can be used to incorporate a experimental results in which both the phytoplankton and zooplankton come to equilibrium 168 within a day (Heldal et al, 2001;Mathews and Fisher, 2008b the course of the sampling period. This is supported by the age of the water at the study sites,…”

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confidence: 99%

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Fukushima 137Cs at the base of planktonic food webs off Japan

Baumann

Fisher

Gobler

et al. 2015

Deep Sea Research Part I: Oceanographic Research Papers

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“…Much has been done for the removal of radionuclonides [2][3][4] . Biosorption for the recovery of the polluted environment has been successfully developed, since it appears to be highly cost-effective and environmentally safe [5][6][7] . Some of the mechanisms involved have also been well documented [8][9][10] .…”

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confidence: 99%

The effects of K+ growth conditions on the accumulation of cesium by the bacterium Thermus sp. TibetanG6

2006

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The accumulation of cesium by the bacterium Thermus sp. TibetanG6 was examined under different K+ growth conditions. The effects of external pH and Na+ on the accumulation of cesium were also studied, and the mechanism involved was discussed. K+ regimes played an important role in the accumulation of cesium by the strain TibetanG6. The quantity of cesium accumulated (24 h) was much higher in K+-deficient regime than that in K+-sufficient regime. The pH and Na+ had different effects on the accumulation of cesium in the two K+ regimes. IR spectra analyses indicated that the biosorption is a process of homeostasis with cesium initially accumulated on the cell wall.

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Bioaccumulation of 137Cs and 57Co by five marine phytoplankton species

Cited by 32 publications

References 7 publications

Adsorption of Radionuclides (134Cs, 85Sr, 226Ra, 241Am) by Extracted Biomasses of Cyanobacteria (Nostoc Carneum, N. Insulare, Oscillatoria Geminata and Spirulina Laxis-Sima) and Phaeophyceae (Laminaria Digitata and L. Japonica; Waste Products from Alginate Production) at Different pH

Adsorption of Radionuclides (134Cs, 85Sr, 226Ra, 241Am) by Extracted Biomasses of Cyanobacteria (Nostoc Carneum, N. Insulare, Oscillatoria Geminata and Spirulina Laxis-Sima) and Phaeophyceae (Laminaria Digitata and L. Japonica; Waste Products from Alginate Production) at Different pH

Fukushima 137Cs at the base of planktonic food webs off Japan

The effects of K+ growth conditions on the accumulation of cesium by the bacterium Thermus sp. TibetanG6

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