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Adsorption of inorganic mercury from aqueous solutions onto dry biomass of Chlorella vulgaris: kinetic and isotherm study

Solisio, Carlo ; Al Arni, Saleh ; Converti, Attilio

Environmental technology, 2019-02, Vol.40 (5), p.664-672 [Periódico revisado por pares]

England: Taylor & Francis

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Título:
Adsorption of inorganic mercury from aqueous solutions onto dry biomass of Chlorella vulgaris: kinetic and isotherm study
Autor: Solisio, Carlo ; Al Arni, Saleh ; Converti, Attilio
Assuntos: Adsorption ; Aqueous solutions ; Biomass ; Biosorption ; Chlorella ; Chlorella vulgaris ; Chlorella vulgaris; kinetics ; Equilibrium ; Freshwater environments ; FT-IR ; Hydrogen-Ion Concentration ; Industrial effluents ; Industrial pollution ; Industrial wastewater ; Infrared radiation ; Isotherms ; Kinetics ; Mercury ; Mercury (metal) ; Mercury biosorption ; Spectroscopy, Fourier Transform Infrared ; Thermodynamics ; Wastewater treatment ; Water Pollutants, Chemical
É parte de: Environmental technology, 2019-02, Vol.40 (5), p.664-672
Notas: ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
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Descrição: This study focused on kinetics and equilibrium isotherms of mercury biosorption from water using dry biomass of Chlorella vulgaris as biosorbent at pH 5.0. Biosorption tests were performed at 2.0 g/L biomass dosage varying initial Hg concentration from 11.0 to 90.6 mg/L. The Lagergren equation was found to best describe the process, with R 2 of 0.984 and specific rate constant of 0.029 ± 0.004 min −1 . Although equilibrium data were well fitted by the Dubinin and Radushkevich isotherm (R 2 = 0.870; q DR = 16.6 mg/g), important insights on phenomenological events occurring at equilibrium were concurrently provided by the Lamgmuir one (R 2 = 0.826; q 0 = 32.6 mg/g; K L = 0.059 L/mg). FT-IR analysis confirmed that Hg biosorption took place via physisorption. Since C. vulgaris is a fresh-water microalga that can be easily cultivated anywhere, these promising results suggest its possible use as an effective, low-cost biosorbent to treat industrial effluents contaminated by this metal.
Editor: England: Taylor & Francis
Idioma: Inglês

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Adsorption of inorganic mercury from aqueous solutions onto dry biomass of Chlorella vulgaris: kinetic and isotherm study

Solisio, Carlo ; Al Arni, Saleh ; Converti, Attilio

England: Taylor & Francis

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