Sorptive potential of a cationic exchange resin of carboxyl banana stem for mercury(II) from aqueous solutions

Anirudhan, T.S.; Senan, Priya; Unnithan, Maya R.

doi:10.1016/j.seppur.2006.06.004

Cited by 42 publications

(22 citation statements)

References 20 publications

(19 reference statements)

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“…These results are comparable to mercury sorption capacities obtained previously with other natural materials such as brown alga Cystoseira baccata [25] or other modified sorbents [28]. On the other hand, S. muticum also presents adsorption capacities similar or even better than some activated carbons [7,29] and exchange resins [30]. The high capacity of this sorbent was previously demonstrated in a preliminary study of the biomass [21].…”

Section: Equilibrium and Kinetic Studiessupporting

confidence: 88%

Adsorptive behaviour of mercury on algal biomass: Competition with divalent cations and organic compounds

Carro

Barriada

Herrero

et al. 2011

Journal of Hazardous Materials

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Section: Equilibrium and Kinetic Studiessupporting

confidence: 88%

Adsorptive behaviour of mercury on algal biomass: Competition with divalent cations and organic compounds

Carro

Barriada

Herrero

et al. 2011

Journal of Hazardous Materials

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“…The molecular area of MB was taken as 130A˚2 [27]. The SSA of PP was found as 167.41, 159.07, and 147.25 m 2 g −1 , according to Eq.…”

Section: Characterization Of the Biosorbentmentioning

confidence: 99%

Biosorption of methylene blue from aqueous solution by potato (Solanum tuberosum) peel: equilibrium modelling, kinetic, and thermodynamic studies

Guechi

Hamdaoui

2015

Desalination and Water Treatment

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In this study, an abundant agricultural waste, potato (Solanum tuberosum) peel, was used as a biosorbent material to test its suitability for removing a basic dye, methylene blue (basic blue 9), from aqueous solutions. The potato peel (PP) was characterized by infrared spectroscopy (FTIR), specific surface area, isoelectric potential (pH ZPC ), and scanning electron microscopy and the functional organic groups were determined by the Boehm titration method. The influence of operating conditions such as contact time, initial concentration of the dye, biosorbent dose, ionic strength, initial solution pH, temperature, and biosorbent particle size on dye removal was discussed. The results show that the increase of the initial concentration, dose of biosorbent material, and pH has a positive impact on the biosorption of dye. However, the ionic strength, the temperature, and particle size have a negative effect on the dye removal. Biosorption kinetic data obtained at different concentrations were modeled using the Lagergren's pseudo-first-order and Blanchard's pseudo-second-order kinetic models to determine the rate constants. It was found that the kinetics of the biosorption of dye closely followed the pseudosecond-order kinetic model. Equilibrium biosorption data were analyzed by four isotherms, namely the Langmuir isotherm, the Freundlich isotherm, the Elovich isotherm, and the Flory-Huggins isotherm. The equilibrium data were best represented by the Langmuir isotherm model, showing maximum monolayer biosorption capacity, q m , of 105.26 mg g −1 . It can be concluded that the PP has homogeneous surface energy. Thermodynamic parameters such as standard enthalpy change (ΔH˚), standard entropy change (ΔS˚), and standard free energy change (ΔG˚) were evaluated. The thermodynamic results suggest that the biosorption is a typical physical process, spontaneous, and exothermic in nature.

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“…Similarly, Anirudhan et al studied that adsorption of polyacrylonitrile graed banana stem having carboxylate functional groups (CBS) on Hg(II) ions is an exothermic process. 36 They reported that this phenomenon can be explained by the fact that Hg(II) ions are bound to carboxylate functional groups via Van der Waals binding to the adsorbent surface.…”

Section: Thermodynamic Studiesmentioning

confidence: 99%

Acid-vacuo heat treated low cost banana stems fiber for efficient biosorption of Hg(ii)

et al. 2015

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The potential of banana stem fiber (BSF) as a low cost biosorbent for Hg(II) removal was studied. HCl treatment increased the cellulose accessibility which led to an enhanced interaction of Hg(II) and BSF.Activation of BSF-HCl in vacuo at 373 K increased the maximum biosorption capacity from 28 to 372 mg g À1 and altered the activation energy from 3.5 to 76.9 kJ mol À1 showing an increase in Hg(II) chemisorption. FTIR and ESR results confirmed the large amount of structural defects on the activated BSF-HCl which led to the increase in Hg(II) uptake. Batch biosorption models showed that the kinetics follow pseudo-second-order and the equilibrium uptake fitted to all three-parameter models showing the Hg(II) biosorption behaves as a Langmuir isotherm. The non-linear regression method exhibited higher coefficient of determination values for isotherm and kinetic analyses compared to the linear method. The thermodynamic functions indicated that the nature of Hg(II) biosorption is an exothermic and non-spontaneous process.

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Sorptive potential of a cationic exchange resin of carboxyl banana stem for mercury(II) from aqueous solutions

Cited by 42 publications

References 20 publications

Adsorptive behaviour of mercury on algal biomass: Competition with divalent cations and organic compounds

Adsorptive behaviour of mercury on algal biomass: Competition with divalent cations and organic compounds

Biosorption of methylene blue from aqueous solution by potato (Solanum tuberosum) peel: equilibrium modelling, kinetic, and thermodynamic studies

Acid-vacuo heat treated low cost banana stems fiber for efficient biosorption of Hg(ii)

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