Screening of agricultural waste for Ni(II) adsorption: Kinetics, equilibrium and thermodynamic studies

Kakalanga, None Sumbu J.

doi:10.5897/ijps12.097

Cited by 3 publications

(1 citation statement)

References 40 publications

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“…3c). In contrast to the biosorption capacity of these anions, that of the metal ions was low at acidic pH, due to the higher availability of hydrogen ions that compete for binding to surface functional groups (Kakalanga et al 2012). Additionally, deprotonation of surface functional groups at acidic pH impairs the ability of the biosorbent surface to bind metal cations (Romero-González et al 2001).…”

Section: Effect Of Initial Phmentioning

confidence: 99%

Simultaneous removal of heavy metals from drinking water by banana, orange and potato peel beads: a study of biosorption kinetics

et al. 2021

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Banana, orange and potato peels (BP, OP and PP, respectively) were immobilised to produce biosorbent beads that were employed for the biosorption of heavy metals from a cocktail solution containing As(V), Cd(II), Cr(VI), Cu(II), Hg(II) and Ni(II) ions. Drinking water conditions were maintained with neutral initial pH and low concentration of the ions. Batch experiments were performed for evaluating the effect of pH in the drinking water range (6.5–8.5). Results showed a significant increase in the biosorption capacity of the beads with respective to the uptake of As and Pb, whereas it decreased significantly for Cd, Cu, Hg and Ni ions at basic pH values. Approximate equilibrium biosorption of Cd, Cu, Hg and Ni was 89–92%, 79–87%, 84% and 71–80% by BP, OP and PP beads. The physisorption-based PFO model was the most suitable for the ions with biosorption capacities closer to the experimental values. BP and OP beads had better biosorption efficiencies relative to PP bead due to the higher surface heterogeneity observed by scanning electron microscopy coupled with energy-dispersive spectroscopy. An increase in the biosorbent concentration from one to ten BP beads significantly increased the biosorption percentage of the ions. The biosorption capacities of Cd, Hg and Ni uptake by one BP bead from a 1 mgL−1 cocktail solution were 3.4 ± 0.0, 5.3 ± 0.1 and 3.0 ± 0.0 mgg−1, respectively. Thus, BP beads were the most effective than for the simultaneous removal of heavy metals from drinking water.

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Section: Effect Of Initial Phmentioning

confidence: 99%

Simultaneous removal of heavy metals from drinking water by banana, orange and potato peel beads: a study of biosorption kinetics

et al. 2021

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Sequestering of Heavy Metal Ions from Aqueous Stream by Raw and Modified Lignocellulosic Materials

Kumar,

Rahul,

Verma

et al. 2022

Advances in Chemical, Bio and Environmental Engineering

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Comparative biosorption of Pb2+ ions from aqueous solution using Moringa oleifera plant parts: Equilibrium, kinetics and thermodynamic studies

Nyoni¹,

Satiya²,

Mukaratirwa‐Muchanyereyi³

et al. 2017

Afr. J. Biotechnol.

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This research article presents a comparative study of the adsorption properties of Moringa oleifera biomass using Pb 2+ ions as test analyte. The investigated parameters which affected the adsorption process were the effect of pH, initial concentration, adsorbent dose, contact time, and temperature. The comparison of adsorption process was evaluated in the pH range of 3 to 8, concentration range from 5 to 20 ppm, temperature varied from 25 to 80°C, variation of contact time from 15 to 80 min, and dose of the adsorbent from 0.3 to 1.2 g. The results obtained showed that a high adsorbent dose is required for high adsorption capacity. The pH of 7 was most effective with temperature set at 25°C and contact time of 60 min. The Temkin, Dubunin-Radushkevich, Langmuir and Freundlich isotherms were applied and fitted well to the data and values of the parameters of these isotherm equations were calculated. The Langmuir isotherm proved to be the overall best isotherm. The adsorbent surface functional groups were identified with Fourier Transform Infrared (FTIR) spectroscopy. The maximum adsorption capacity obtained was 98% for seed, 96% for blended, 94% for pods, and 92% for leaves. Better thermodynamic and kinetic properties were obtained with the seeds and the blended samples. In total, these results indicate that the blended moringa biosobent can be employed as a low-cost biosorbent for the removal of lead ions from water.

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Screening of agricultural waste for Ni(II) adsorption: Kinetics, equilibrium and thermodynamic studies

Cited by 3 publications

References 40 publications

Simultaneous removal of heavy metals from drinking water by banana, orange and potato peel beads: a study of biosorption kinetics

Simultaneous removal of heavy metals from drinking water by banana, orange and potato peel beads: a study of biosorption kinetics

Sequestering of Heavy Metal Ions from Aqueous Stream by Raw and Modified Lignocellulosic Materials

Comparative biosorption of Pb2+ ions from aqueous solution using Moringa oleifera plant parts: Equilibrium, kinetics and thermodynamic studies

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