Biosorption of Mercury(II) with Different Marine Algae

Mariana Reategui; Holger Maldonado; M. Ly; Eric Guibal

doi:10.4028/www.scientific.net/AMR.71-73.585

Paper Titles

Effects of Different COD/Sulfate Ratios on the Growth of Metal Tolerant Sulfate Reducing Bacteria (SRB)
p.569

Testing of Different Substrate Materials for Sulphate Reducing Reactive Barrier to Treat Acid Mine Drainage
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Heavy Metals Immobilization in Contaminated Smelter Soils Using Microbial Sulphate Reduction
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Bioprecipitation of Arsenic Sulphide at Low pH
p.581

Biosorption of Mercury(II) with Different Marine Algae
p.585

Characterization of Sargassum sp. from Brazil and Evaluation of Cu²⁺ and Ni²⁺ Biosorption
p.589

Cr (VI) Ion Uptake by the Yeast S. Cerevisiae UCM Y-1968 and its Protoplasts
p.593

Waste Biomass from Marine Environment as Arsenic and Lead Biosorbent
p.597

Cadmium and Zinc Biosorption by Macrocystis Pyrifera: Changes in the Biomass
p.601

HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 71-73Biosorption of Mercury(II) with Different Marine...

Biosorption of Mercury(II) with Different Marine Algae

Abstract:

Five species of algae (Lessonia nigrescens Bory, Prionitis decipiens, Grateloupia doryphora, Lessonia trabeculata and Macrocystis integrifolia) collected from Peruvian coast have been tested for mercury recovery from synthetic solutions. Preliminary experiments showed that optimum sorption occurred at pH 6-7 and that Lessonia algae were the most efficient sorbents for Hg(II). The biomass was cross-linked with calcium chloride. Stabilized biosorbent showed sorption capacity as high as 267 mg g-1 at pH 6. The sorption isotherm was described by the Langmuir equation, while the pseudo-second order equation was used for modeling uptake kinetics. Salt addition strongly affected mercury sorption following the sequence: NaNO3 << Na2SO4 <<< NaCl.