Unicellular algae used as biosensors for chemical detection in Mediterranean lagoon and coastal waters

Durrieu, Claude; Guedri, Houssemeddine; Frémion, Franck; Volatier, Laurence

doi:10.1016/j.resmic.2011.07.002

Cited by 21 publications

(13 citation statements)

References 17 publications

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“…High tolerance to elevated levels of heavy metals was also reported for some freshwater algae (Goodyear and McNeill, 1999;Das et al, 2008;Rajfur et al, 2011;Chekroun and Baghour, 2013) and gastropods (Beeby and Eaves, 1983;Lau et al, 1996;Jordaens et al, 2006). These species have the ability to aggregate heavy metals within their organelles and are often used as bioindicators in polluted ecosystems (Goodyear and McNeill, 1999;Kaonga et al, 2008;Rajfur et al, 2010;Rajfur et al, 2011;Brayner et al, 2011;Durrieu et al, 2011;De Philippis et al, 2011;Mishra et al, 2011;Vogel et al, 2010;Kumar and Oommen, 2012). Algae (e.g.…”

Section: Introductionmentioning

confidence: 79%

Interaction of acid mine drainage with biota in the Allchar Carlin-type As-Tl-Sb-Au deposit, Macedonia

Bermanec

Palinkaš

Fiket

et al. 2018

Journal of Geochemical Exploration

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Allchar ore deposit, a well-known polymetallic mineralisation, is drained by the Majdanska River characterized by elevated concentrations of heavy metals and metalloids, particularly As, Tl and Sb. The present study was conducted at the spot of the confluence of spring water, heavily loaded with toxic metals, which joins the Majdanska River by a few meters short stream. The spring water is outflow of underground water drained by passage through polymetallic mineralisation. The chemical characteristics of the Majdanska River water and the associated periphyton were used to evaluate and explain the abiotic response to the intrusion of toxicants and its impact on biota. At the site of the stream inflow, thorough mixing of Majdanska River water and incoming spring water resulted in an increase of Eh and pH close to the average river value. This geochemical barrier causes significant changes in the mobility of metal species. Moreover, the output composition of water is further modified by biological processes. The examined biota community was found to consist of algae Audouinella sp. and Spirogyra sp., with coexisting freshwater snails Radix labiata, diatoms and bacteria. While the carbonate bedrock controls the pH of the river water by effective buffering, it seems that bioconcentration and biomineralisation of algae exerted control on toxicants along the entire river flow. The highest bioconcentration factors were obtained for Fe, Mn and Ti which implies the biomineralisation of iron as a product of extracellular deposition on the cell walls on the organic matrices. Bioconcentration of As, Cr, Cs, Cu and Se was more important in Audouinella sp., while Cd, Co, Sr, and Zn preferentially accumulated in Spirogyra sp. High accumulation of Ba (3 mg/g d.w.) in Spirogyra sp. was associated with the intracellular biomineralisation. These findings suggest the potential use of Spirogyra sp. in the remediation of waters polluted by barium or as the biological pathfinder indicator for metal deposits associated with barite.

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Section: Introductionmentioning

confidence: 79%

Interaction of acid mine drainage with biota in the Allchar Carlin-type As-Tl-Sb-Au deposit, Macedonia

Bermanec

Palinkaš

Fiket

et al. 2018

Journal of Geochemical Exploration

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“…Microalgae are therefore often used as biological sensors for detecting potential toxic effects of heavy metals like copper, nickel, zinc, cadmium etc. [5][6][7]. These metals are essential constituents but in higher concentrations, it adversely affects the aquatic ecosystem and indirectly affects the human health [8].…”

Section: Introductionmentioning

confidence: 99%

Quaternary Adsorption Effect of Nickel (II), Antimony (III), Manganese (II) and Copper (II) onto Living Two Green Microalgae

Şentürk¹,

Yıldız²

2018

Cumhuriyet Science Journal

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This study aimed to investigate Ni, Sb, Mn and Cu adsorption from aqueous solution by Chlorella and Scenedesmus algae. The competitive adsorption efficiency of nickel (Ni 2+), antimony (Sb 3+), manganese (Mn 2+) and copper (Cu 2+) onto two living microalgae strains was studied from multi-metal aqueous solution for 24h incubation time. After exposure, chlorophyll a-b, total carbohydrate and Atomic force microscopy (AFM) imaging were performed. Then adsorption isotherms models of metal ions were determined based on Langmuir and Freundlich isotherms. The adsorption capacity in multi-metal system was determined 6.47 mgg-1 for antimony, 5.96 mgg-1 for manganese, 28.57 mgg-1 for copperand 10.71 mgg-1 for nickel (Cu>Ni>Sb>Mn) by Chlorella respectively, whereas, and 10.82 mg g-1 for antimony, 7.07 mgg-1 for manganese, 27.09 mgg-1 for copper and 9.71 mgg-1 for nickel(Cu>Sb>Ni>Mn) by Scenedesmus cells. According to AFM images, deformation was detected in two algae cell walls treated with heavy metals compared to untreated cells. For this study, Freundlich adsorption model best fitted the data for all metal ions with 1/n value <1. As a result, when the results obtained in the study are revealed that Chlorella and Scenedesmus cells were an effective adsorbent for removal of the four heavy metals, especially Cu 2+ ions from aqueous solutions due to its high efficiency of Cu adsorption.

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“…41 However, this requires a detailed understanding of the relationships between the chemical conditions of synthesis (concentration of each precursors and pH) and the mechanisms behind the formation of the hydrogels that dictate their physical properties (optical transparency and stiffness) and finally determine their impact on encapsulated cells. Here algal cells were selected as probes for the phycocompatibility of the process, not only because they usually allow for the evaluation in a wider range of pH and salinity than bacteria but also because immobilized photosynthetic organisms constitute the most popular type of cells currently studied for the design of environmental biosensors 42,43 and green bioreactors. was considered as the gelation time, with a AE1 min estimated error.…”

Section: Introductionmentioning

confidence: 99%

The physics and chemistry of silica-in-silicates nanocomposite hydrogels and their phycocompatibility

et al. 2017

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aSilicates-in-silica nanocomposite hydrogels obtained from sodium silicates/colloidal silica mixtures have previously been found to be useful for bacterial encapsulation. However the extension of synthesis conditions and the understanding of their impact on the silica matrix would widen the applicability of this process in terms of encapsulated organisms and the host properties. Here the influence of silicates and the colloidal silica concentration as well as pH conditions on the gel time, the optical properties, the structural and mechanical properties of silica matrices was studied. We show that gel formation is driven by silicate condensation but that the aggregation of silica colloids also has a major influence on the transparency and structure of the nanocomposites. Three different photosynthetic organisms, cyanobacteria Anabaena flos-aquae and two microalgae Chorella vulgaris and Euglena gracilis, were used as probes of the phycocompatibility of the process. The three organisms were highly sensitive to the silicate concentration, which impacts both the gelation time and ionic strength conditions. The Ludox content was crucial for cyanobacteria as it strongly impacts the Young's modulus of the matrices.The detrimental effect of acidic pH on cell suspension was compensated by the silica network. Overall, it is now possible to select optimal encapsulation conditions based on the physiology of the targeted cells, opening wide perspectives for the design of biosensors and bioreactors.

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Unicellular algae used as biosensors for chemical detection in Mediterranean lagoon and coastal waters

Cited by 21 publications

References 17 publications

Interaction of acid mine drainage with biota in the Allchar Carlin-type As-Tl-Sb-Au deposit, Macedonia

Interaction of acid mine drainage with biota in the Allchar Carlin-type As-Tl-Sb-Au deposit, Macedonia

Quaternary Adsorption Effect of Nickel (II), Antimony (III), Manganese (II) and Copper (II) onto Living Two Green Microalgae

The physics and chemistry of silica-in-silicates nanocomposite hydrogels and their phycocompatibility

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