Posidonia oceanica: A tracer of past mercury contamination

Lafabrie, Céline; Pergent, Gérard; Pergent-Martinì, Christine; Capiomont, Anne

doi:10.1016/j.envpol.2006.11.015

Cited by 27 publications

(15 citation statements)

References 23 publications

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“…This result might be related to the presence of industrial sites (e.g., refinery, metallurgical plant and commercial port) located near the collection site (about 30 km away). Indeed, P. oceanica is increasingly used as an indicator of chemical contaminations for coastal regions of the Mediterranean Sea, and it is often considered a useful metal bio-indicator [44], [45], [48]. In particular, P. oceanica has been investigated as a bio-indicator for mercury, which was also found in samples used for this study (Table 3), and some studies have suggested that several trace metals can be memorized through analysis of its below-ground tissues [44], [49], [50].…”

Section: Resultsmentioning

confidence: 99%

Removal of Vanadium(III) and Molybdenum(V) from Wastewater Using Posidonia oceanica (Tracheophyta) Biomass

2013

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The use of dried and re-hydrated biomass of the seagrass Posidonia oceanica was investigated as an alternative and –low-cost biomaterial for removal of vanadium(III) and molybdenum(V) from wastewaters. Initial characterisation of this biomaterial identified carboxylic groups on the cuticle as potentially responsible for cation sorption, and confirmed the toxic-metal bioaccumulation. The combined effects on biosorption performance of equilibrium pH and metal concentrations were investigated in an ideal single-metal system and in more real-life multicomponent systems. There were either with one metal (vanadium or molybdenum) and sodium nitrate, as representative of high ionic strength systems, or with the two metals (vanadium and molybdenum). For the single-metal solutions, the optimum was at pH 3, where a significant proportion of vanadium was removed (ca. 70%) while there was ca. 40% adsorption of molybdenum. The data obtained from the more real-life multicomponent systems showed that biosorption of one metal was improved both by the presence of the other metal and by high ionic strength, suggesting a synergistic effect on biosorption rather than competition. There data ware used for the development of a simple multi-metal equilibrium model based on the non-competitive Langmuir approach, which was successfully fitted to experimental data and represents a useful support tool for the prediction of biosorption performance in such real-life systems. Overall, the results suggest that biomass of P. oceanica can be used as an efficient biosorbent for removal of vanadium(III) and molybdenum(V) from aqueous solutions. This process thus offers an eco-compatible solution for the reuse of the waste material of leaves that accumulate on the beach due to both human activities and to storms at sea.

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Section: Resultsmentioning

confidence: 99%

Removal of Vanadium(III) and Molybdenum(V) from Wastewater Using Posidonia oceanica (Tracheophyta) Biomass

2013

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“…Due to its sensitivity to environmental perturbations, P. oceanica is widely recognized as a bioindicator of sea quality in this region (Pergent et al 1995, Ferrat et al 2003, Ruiz & Romero 2003, Tranchina et al 2005, Lafabrie et al 2007, Montefalcone 2009). The P. oceanica meadows have declined significantly throughout the Mediterranean basin over the past 2 decades (Marbà et al 1996, Short & Wyllie-Echeverria 1996.…”

Section: Introductionmentioning

confidence: 99%

PoCHL P expression pattern in Posidonia oceanica is related to critical light conditions

Bruno¹,

Bruno²,

Chiappetta³

et al. 2010

Mar. Ecol. Prog. Ser.

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In past decades, meadows of Posidonia oceanica (L) Delile have declined extensively in the Mediterranean basin mainly due to disturbances associated with reduced light availability. To investigate the molecular mechanisms of photoacclimation in this seagrass, we selected the CHL P gene as a marker of plant response to light availability because it is involved in the chlorophylltocopherols biosynthetic pathways. After characterizing the PoCHL P gene, its expression pattern was analyzed in leaves of plants growing in 2 distinct meadows that were previously categorized as disturbed and preserved. Plants were sampled during different seasons and light availability was monitored in the selected meadows over a 1 yr period. PoCHL P expression was also analyzed in leaves of plants that were exposed to controlled light conditions in aquaria. We found that PoCHL P was expressed differentially with respect to leaf developmental stage and that its expression pattern changed rapidly under light conditions far below the compensation value established for P. oceanica. Hence, the recognition of this gene as a reasonable marker of critical light conditions provides an important step towards the functional characterization of stress-related genes in seagrasses. KEY WORDS: PoCHL P expression · Posidonia oceanica · Light availabilityResale or republication not permitted without written consent of the publisher

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“…This result might be related to the presence of industrial sites (e.g., refinery, metallurgical plant and commercial port) located near the collection site (about 30 km away). Indeed, P. oceanica is increasingly used as an indicator of chemical contaminations for coastal regions of the Mediterranean Sea, and it is often considered a useful metal bio-indicator [44,45,48]. In particular, P. oceanica has been investigated as a bioindicator for mercury, which was also found in samples used for this study (Table 3), and some studies have suggested that several trace metals can be memorized through analysis of its belowground tissues [44,49,50].…”

Section: Heavy Metal Concentration In Posidonia Oceanicamentioning

confidence: 91%

“…It can be seen that there were no significant differences between the metal concentrations in the two samples (Table 3). This suggests that the P. oceanica tissue contains traces of metals, which will be connected to the phenomenon of bioaccumulation, of which there are many studies in the literature [43][44][45][46][47]. This result might be related to the presence of industrial sites (e.g., refinery, metallurgical plant and commercial port) located near the collection site (about 30 km away).…”

Section: Heavy Metal Concentration In Posidonia Oceanicamentioning

confidence: 96%

- Anaerobic Treatment of Wastewater from Used Industrial Oil Recovery

2015

Ecological Technologies for Industrial Wastewater Management

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The use of dried and re-hydrated biomass of the seagrass Posidonia oceanica was investigated as an alternative and -lowcost biomaterial for removal of vanadium(III) and molybdenum(V) from wastewaters. Initial characterisation of this biomaterial identified carboxylic groups on the cuticle as potentially responsible for cation sorption, and confirmed the toxic-metal bioaccumulation. The combined effects on biosorption performance of equilibrium pH and metal concentrations were investigated in an ideal single-metal system and in more real-life multicomponent systems. There were either with one metal (vanadium or molybdenum) and sodium nitrate, as representative of high ionic strength systems, or with the two metals (vanadium and molybdenum). For the single-metal solutions, the optimum was at pH 3, where a significant proportion of vanadium was removed (ca. 70%) while there was ca. 40% adsorption of molybdenum. The data obtained from the more real-life multicomponent systems showed that biosorption of one metal was improved both by the presence of the other metal and by high ionic strength, suggesting a synergistic effect on biosorption rather than competition. There data ware used for the development of a simple multi-metal equilibrium model based on the noncompetitive Langmuir approach, which was successfully fitted to experimental data and represents a useful support tool for the prediction of biosorption performance in such real-life systems. Overall, the results suggest that biomass of P. oceanica can be used as an efficient biosorbent for removal of vanadium(III) and molybdenum(V) from aqueous solutions. This process thus offers an eco-compatible solution for the reuse of the waste material of leaves that accumulate on the beach due to both human activities and to storms at sea.

show abstract

Posidonia oceanica: A tracer of past mercury contamination

Cited by 27 publications

References 23 publications

Removal of Vanadium(III) and Molybdenum(V) from Wastewater Using Posidonia oceanica (Tracheophyta) Biomass

Removal of Vanadium(III) and Molybdenum(V) from Wastewater Using Posidonia oceanica (Tracheophyta) Biomass

PoCHL P expression pattern in Posidonia oceanica is related to critical light conditions

- Anaerobic Treatment of Wastewater from Used Industrial Oil Recovery

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