Adsorption of Cu (II), Mn (II) and Zn (II) by Spirodela polyrhiza (L.) Schleiden: Equilibrium, kinetic and thermodynamic studies

Meitei, Maibam Dhanaraj; Prasad, M.N.V.

doi:10.1016/j.ecoleng.2014.07.036

Cited by 105 publications

(44 citation statements)

References 45 publications

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“…3C, the biosorption capacity of the biomass increased with increasing Pb(II) concentration, however, the percentage removal of Pb(II) decreased from 93.88 to 72.21 for PAL and 99.16 to 84.37 for HPAL biosorbent as the Pb(II) ion concentrations were increased from 5.19 to 305.79 mg L À1 . The higher removal of Pb(II) at low concentration might be attributed to the availability of more ''active sites'' on the surface of the biosorbents (Amarasinghe and Williams, 2007;Chakravarty et al, 2010), while the lower removal of Pb(II) at high concentration may be due to the lack of available ''active sites'' on the surface of biosorbents (Meitei and Prasad, 2014;Tasar et al, 2014). Further, the results obtained showed that P. americana biomass can be efficiently used for the removal of Pb 2+ from wastewater with low concentration.…”

Section: Effect Of Initial Concentration On Pb(ii) Removalmentioning

confidence: 96%

“…The maximum removal efficiencies of PAL and HPAL occurred at pH 6.0 and reached 81.97% and 93.29%, respectively. It was well known that a lower pH resulted in high concentration of H + in the solution, thus the functional groups of the biosorbent surface were protonated (Reddy et al, 2010;Meitei and Prasad, 2014). Hence, Pb(II) ion adsorption was hindered owing to the competition between H + and Pb 2+ for the active sites on the surface of the biosorbent.…”

Section: Effect Of Ph On Pb(ii) Removalmentioning

confidence: 98%

“…The change of Gibbs free energy could indicate the spontaneity of a chemical reaction. Thermodynamic parameters including the change of Gibbs free energy (DG°), enthalpy (DH°), and entropy (DS°) can be calculated from the following equations (BazarganLari et al, 2014;Meitei and Prasad, 2014;Yargıc¸et al, 2015).…”

Section: Biosorption Thermodynamic Studiesmentioning

confidence: 99%

“…(4)] adsorption isotherms were applied to fit the Pb(II) equilibrium data (Meitei and Prasad, 2014).…”

Section: Biosorption Isotherm Modelsmentioning

confidence: 99%

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Removal of Pb(II) from aqueous solutions by Phytolacca americana L. biomass as a low cost biosorbent

Wang

Zhang

Yao

et al. 2018

Arabian Journal of Chemistry

128

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Screening a new biosorbent with low cost and high efficiency from a native plant material is a key to the adsorption of heavy metal ions from wastewater. In this study, the potential of Phytolacca americana L. as a biosorbent for Pb(II) removal from aqueous solutions was investigated. Experiments were performed to evaluate the effect of biosorbent dosage, pH, initial Pb(II) concentration and contact time on the Pb(II) removal. The results indicated that the hydroxyl, carboxyl and amine groups may take part in Pb(II) binding. HNO 3 -modified P. americana (HPAL) showed a significant higher uptake capacity compared to original P. americana (PAL) (p < 0.05). A dose of 20 g L À1 of biosorbents in solutions with an initial pH of 6.0, an initial Pb(II) concentration of 30 mg L À1 and a contact time of 120 min resulted in the maximum Pb(II) removal efficiency. The Freundlich isotherm gave a better fit than the Langmuir isotherm revealed that the biosorption was potentially multilayer. Further, the adsorption kinetics followed a pseudo second-order model, which implied that the biosorption was mainly a chemisorption process. The thermodynamic properties showed that the Pb(II) adsorption onto the P. americana biomass was feasible, spontaneous and exothermic in nature. Both physisorption and chemisorption were involved in the biosorption of Pb(II) onto the surface of P. americana biomass through electrostatic interaction and ion exchange. Additionally, desorption studies revealed promising regeneration potential of these biosorbents. The present study showed that P. americana biomass could be used

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Section: Effect Of Initial Concentration On Pb(ii) Removalmentioning

confidence: 96%

Section: Effect Of Ph On Pb(ii) Removalmentioning

confidence: 98%

Section: Biosorption Thermodynamic Studiesmentioning

confidence: 99%

“…(4)] adsorption isotherms were applied to fit the Pb(II) equilibrium data (Meitei and Prasad, 2014).…”

Section: Biosorption Isotherm Modelsmentioning

confidence: 99%

See 2 more Smart Citations

Removal of Pb(II) from aqueous solutions by Phytolacca americana L. biomass as a low cost biosorbent

Wang

Zhang

Yao

et al. 2018

Arabian Journal of Chemistry

128

View full text Add to dashboard Cite

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“…Enthalpy (DH), The Gibbs free energy (DG), and entropy (DS) of the adsorption processes were calculated using the following equations (Meitei and Prasad 2014;Luo et al 2015):…”

Section: Thermodynamics Of Adsorption Processesmentioning

confidence: 99%

Characterization and evaluation of amorphous carbon thin film (ACTF) for sodium ion adsorption

et al. 2017

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The removal of sodium ions from aqueous solutions by adsorption onto amorphous carbon thin film (ACTF) has been studied in batch mode. In this work, the ACTF as new adsorbent was synthesized based on rice straw, then its structure and properties were taken into consideration to study its ability to adsorb sodium ions from synthetic water. The influence of pH, contact time, and temperature of the ion adsorption on ACTF was also studied using batch tests. We found that the contact time of sodium adsorption and its isothermal adsorption studied were described by pseudo-second-order kinetic model and Langmuir isotherm, respectively. Our results indicated that the adsorption of sodium ions on ACTF become be stronger and depends on pH, furthermore, the maximum adsorption capacities of sodium on ACTF recorded 107, 120 and 135 mg g -1 at 35, 45, and 65°C. The thermodynamic parameters explain that the adsorption of sodium ions on ACTF is a spontaneous process and endothermic reaction. According to adsorption studies, we found that the ACTF can be used effectively for ion chromatography or desalinate sodium ion using ion exchange process in the hybrid desalination process with insignificant loss of adsorption capacity. However, the ACTF has better properties than any other carbon materials obtained from an agricultural byproduct.

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Rice Husk and Wood Derived Charcoal for Remediation of Metal Contaminated Soil

Kiran

Prasad

2021

Handbook of Assisted and Amendment: Enhanced Sustainable Remediation Technology

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Adsorption of Cu (II), Mn (II) and Zn (II) by Spirodela polyrhiza (L.) Schleiden: Equilibrium, kinetic and thermodynamic studies

Cited by 105 publications

References 45 publications

Removal of Pb(II) from aqueous solutions by Phytolacca americana L. biomass as a low cost biosorbent

Removal of Pb(II) from aqueous solutions by Phytolacca americana L. biomass as a low cost biosorbent

Characterization and evaluation of amorphous carbon thin film (ACTF) for sodium ion adsorption

Rice Husk and Wood Derived Charcoal for Remediation of Metal Contaminated Soil

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