Biosorption of Co(II) ions from aqueous solution using Chrysanthemum indicum: Kinetics, equilibrium and thermodynamics

Vilvanathan, Sowmya; Shanthakumar, S.

doi:10.1016/j.psep.2015.05.001

Cited by 56 publications

(19 citation statements)

References 42 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…On the other hand, Pb II and Cu II took priority for active sites in all evaluated concentration. 73 Although there was a decrease in R for some ions at 500 μg L −1 experiments, values of R were higher than 50% to all ions. Therefore, this concentration was chosen for further experiments.…”

Section: Influence Of the Initial Concentration Of Trace Metals On Admentioning

confidence: 83%

Combined Analytical Py-GC/MS, SEM, FTIR and 13C NMR for Investigating the Removal of Trace Metals from Aqueous Solutions by Biochar

Andrade¹,

Monteiro²,

Gontijo³

et al. 2020

J. Braz. Chem. Soc.

View full text Add to dashboard Cite

In this study, the efficiency of biochar (BC) produced from sugarcane bagasse at different pyrolysis temperatures (300, 400, 500 and 600 °C) for simultaneous removal of Cd II , Pb II , Cu II , Cr III , Ni II and Zn II ions from aqueous solutions was assessed. All BC were characterized using scanning electron microscopy (SEM), Fourier transform infrared (FTIR), 13 C nuclear magnetic resonance (13 C NMR) and pyrolysis-gas chromatography-mass spectrometry (Py-GC-MS). The effects of pyrolysis temperature, initial adsorbate concentration and adsorbent dosage on adorption capacity of BC were examined through batch experiments. The BC efficiency was also evaluated after a desorption cycle. The maximal adsorptions (Cd II : 51.50%, Cr III : 74.35%, Cu II : 91.18%, Ni II : 47.05%, Pb II : 96.17% and Zn II : 40.50%) were observed for BC produced at 500 °C, probably because of its higher porosity and presence of functional groups detected by SEM and FTIR. The maximum adsorption capacity for Cd II , Cr III , Cu II , Ni II and Zn II (ions fitted to Langmuir model) were 175, 303, 455, 156 and 128 μg g −1 , respectively. The predominance of phenolic groups observed in Py-GC-MS data may explain the high percentage of multi-element removal. Experimental data were best fitted to pseudo-second order, Sips and Freundlich models. The BC presented good removal results after a desorption cycle.

show abstract

Section: Influence Of the Initial Concentration Of Trace Metals On Admentioning

confidence: 83%

Combined Analytical Py-GC/MS, SEM, FTIR and 13C NMR for Investigating the Removal of Trace Metals from Aqueous Solutions by Biochar

Andrade¹,

Monteiro²,

Gontijo³

et al. 2020

J. Braz. Chem. Soc.

View full text Add to dashboard Cite

show abstract

“…Harmony centralizations of Na ? ionic species, at diverse pH, are a useful premise for the discourse of the adsorption mechanism (Vilvanathan and Shanthakumar 2015;Vinhal et al 2015). The absorption of sodium ions becomes fixed when the pH more than seven because of the saturation at active site on the ACTF that specific subtracted experimentally from all available amount of sodium ions, so these are the reliable values of absorbed sodium we obtained.…”

Section: Tem Analysismentioning

confidence: 83%

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

et al. 2017

View full text Add to dashboard Cite

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.

show abstract

“…The kinetic data was analyzed by using the pseudo‐first‐order and pseudo‐second‐order rate equations. The two equations are expressed as follows :

l o g false(Q_{e} - Q_{t} false) = l o g Q_{normale} - \frac{k_{1} t}{2.303}

\frac{t}{Q_{t}} = \frac{1}{k_{2} {Q_{normale}}^{2}} + \frac{t}{Q_{e}}

where Q t (mg/g) and Q e (mg/g) are the adsorbed capacity of E1 at various times ( t ) and at equilibrium, respectively, K 1 (1/min) and K 2 (g/mg·min) are the pseudo‐first‐order and pseudo‐second‐order rate constant, respectively.…”

Section: Resultsmentioning

confidence: 99%

“…The kinetic data was analyzed by using the pseudo-firstorder and pseudo-second-order rate equations. The two equations are expressed as follows [30,31]: where Q t (mg/g) and Q e (mg/g) are the adsorbed capacity of E1 at various times (t) and at equilibrium, respectively, K 1 (1/min) and K 2 (g/mg⋅min) are the pseudo-first-order and pseudo-second-order rate constant, respectively. The adsorption kinetic constants of the two models are listed in Supporting Information Table S5.…”

Section: Adsorption Kineticsmentioning

confidence: 99%

Facile preparation of polydopamine‐coated imprinted polymers on the surface of SiO₂ for estrone capture in milk samples

Zheng

Zhang

Luo

et al. 2016

J of Separation Science

View full text Add to dashboard Cite

Estrone molecularly imprinted polymers were synthesized through the self-polymerization of dopamine on the surface of silica gels, which had the characteristics of mild polymerization conditions, simple reaction procedure and good specific recognition ability for estrone. The estrone molecularly imprinted polymers were characterized by scanning electron microscopy, Fourier transform infrared spectroscopy, thermogravimetric analysis, elemental analysis and nitrogen adsorption-desorption tests. The characterization confirmed that the imprinted polymers were successfully grafted on the surface of silica gels. Through investigating the adsorption performance, the prepared estrone molecularly imprinted polymers exhibited high adsorption capacity, fast mass transfer, as well as excellent selectivity toward estrone. The estrone molecularly imprinted polymers as the solid-phase extraction adsorbent coupled with high-performance liquid chromatography was developed to determine estrone from the milk samples. The developed estrone molecularly imprinted polymer solid-phase extraction with high-performance liquid chromatography method exhibited satisfactory specificity, precision, accuracy and good linearity relationship in the range of 0.2-20 μg/mL. The developed method is simple, fast, effective and high specificity method and it provides a new method to detect the residues of estrone in animal foods.

show abstract

Biosorption of Co(II) ions from aqueous solution using Chrysanthemum indicum: Kinetics, equilibrium and thermodynamics

Cited by 56 publications

References 42 publications

Combined Analytical Py-GC/MS, SEM, FTIR and 13C NMR for Investigating the Removal of Trace Metals from Aqueous Solutions by Biochar

Combined Analytical Py-GC/MS, SEM, FTIR and 13C NMR for Investigating the Removal of Trace Metals from Aqueous Solutions by Biochar

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

Facile preparation of polydopamine‐coated imprinted polymers on the surface of SiO₂ for estrone capture in milk samples

Contact Info

Product

Resources

About

Biosorption of Co(II) ions from aqueous solution using Chrysanthemum indicum: Kinetics, equilibrium and thermodynamics

Cited by 56 publications

References 42 publications

Combined Analytical Py-GC/MS, SEM, FTIR and 13C NMR for Investigating the Removal of Trace Metals from Aqueous Solutions by Biochar

Combined Analytical Py-GC/MS, SEM, FTIR and 13C NMR for Investigating the Removal of Trace Metals from Aqueous Solutions by Biochar

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

Facile preparation of polydopamine‐coated imprinted polymers on the surface of SiO2 for estrone capture in milk samples

Contact Info

Product

Resources

About

Facile preparation of polydopamine‐coated imprinted polymers on the surface of SiO₂ for estrone capture in milk samples