Peer Reviewed: Plant-Derived Materials for Metal Ion-Selective Binding and Preconcentration

Drake, Lawrence R.; Rayson, Gary D.

doi:10.1021/ac9618029

Cited by 52 publications

(38 citation statements)

References 31 publications

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“…The search for low cost, and easily available adsorbents has led to the investigation of materials of agricultural and biological origin, alongside those of industrial by-products as adsorbents for removal of heavy metals [13][14][15][16][17]. Examples of such low cost adsorbents are clay [18], cotton [19], wool fiber [20], tea leaves [21] and other materials [22][23][24][25].…”

Section: Introductionmentioning

confidence: 99%

Removal of lead(II) ions from aqueous solutions using activated carbon from Militia ferruginea plant leaves

Mengistie

Rao

Singanan

2008

Bull. Chem. Soc. Eth.

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ABSTRACT. The adsorption of lead(II) on to activated carbon developed from an indigenous Ethiopian medicinal plant leaves namely Birbira (Militia ferruginea) was investigated to assess the possible use of this adsorbent. The influences of contact time, adsorbent dose, Pb(II) concentration, pH and temperature on adsorption were investigated. The maximum adsorption took place at 3 h. at a dose of 4.0 g of adsorbent, and 97.3 % of Pb . The percentage of adsorption had increased with the increasing temperature. The positive value of ∆H indicated that the adsorption of lead ions on the adsorbent was an endothermic process. The values of free energy (∆G) were negative as expected for a spontaneous process. The decrease in ∆G value with increasing temperature revealed that adsorption of the ion on the adsorbent became favorable at a higher temperature. The calculated value of ∆H was 25.05 kJ mol -1 , ∆S was 135.48 JK -1 mol -1 and ∆G was also calculated for each temperature. The two theoretical adsorption isotherms, namely, Langmuir and Freundlich were used to describe the experimental results. The Freundlich adsorption isotherm best fits and adsorption capacity was calculated to be 3.3 mg of Pb(II) per g of adsorbent. The adsorption followed the first order kinetics and was found to be pH dependent being maximum at pH 4.0. The pH effect and desorption studies showed that ion exchange mechanism might be involved in the adsorption process. Reuse of the desorbed bio-adsorbent is possible. The effect of foreign ions on the removal of Pb(II) has been investigated. The removal of Pb(II) from industrial wastewater sample was also tested and showed that more than 97 % removal was possible. The results showed that activated carbon prepared from Birbira (Militia ferruginea) leaves could be used for the removal of Pb(II) from wastewater.

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Section: Introductionmentioning

confidence: 99%

Removal of lead(II) ions from aqueous solutions using activated carbon from Militia ferruginea plant leaves

Mengistie

Rao

Singanan

2008

Bull. Chem. Soc. Eth.

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“…While some metal ions exhibited the more typical plateau region at higher concentrations for each material (e.g. Pb Because of the inherent chemical heterogeneity of plant-based biosorbents [19], a binding model first proposed by Sips [29] was used to analyze these binding isotherms.…”

Section: Resultsmentioning

confidence: 99%

“…These included x-ray [7], infrared [18], and metal luminescence spectroscopy [6,15,19], chromatographic techniques [8,20], and binding isotherm data analysis and simulation [5]. Those studies revealed oxy-anion involvement, typically as carboxylates, in the biosorption of a variety of metal ion species [7,9] on non-viable biomaterials ranging in biocomplexity from single-cell algae to intact plant tissues [5,[6][7][8][9][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Competitive Metal Ion Binding to Datura innoxia Root and Stem Tissue Materials

2016

J Analyt Molecul Tech

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Dried root and stem tissue samples from the plant, Datura innoxia, were exposed to solutions containing six metal ions, Zn 2+ , Cu 2+ , Cd 2+ , Ni 2+ , Pb 2+ , and Eu 3+ . The resulting binding isotherms were generated using multiline atomic emission spectra of supernatant solutions. Application of regularized regression analysis to these isotherms revealed binding sites exhibiting both low and high value conditional affinities. Low affinity sites (1.5×10 -2 to 2.5×10 -1 ) were postulated to involve electrostatic physisorption processes with large potential capacities (0.11 to 3.2 moles gram -1 ). 9 with potential capacities of 12 µmoles g -1 to 0.15 moleg -1 . These were attributed to surface complex formation and included each metal ion studied. This is the first reporting of relative affinities and capacities for metal ion biosorption under competitive conditions involving seven metals. Similarities in measured affinity constants for each metal when comparing root and stem tissue materials suggest similar predominate chemical interactions involving either of these binding mechanisms. These results support mechanisms involving carboxylates for both root and stems materials. Site densities clearly show the vast majority of binding interactions to be governed by more general electrostatic forces. Such would be advantageous for the application of this plant for phytoextraction purposes.

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“…Metallic ions adsorption by dead organisms occurs through sorption process involving the functional groups associated with proteins, polysaccharides, carboxylate, hydroxyl, sulfhydryl groups and other biopolymers contained the cell or the cell wall [1]. The adsorption process can occur chemically or physically.…”

Section: Introductionmentioning

confidence: 99%

Modification of Cellulose with 4.4 Diaminodiphenylether-O-Hydroxibenzaldehide as Adsorbent and Its Application for Adsorbing Metalic Ion of Cd2+ In Aqueous Solution

Hidayati¹,

Mohadi²,

Marsitho³

et al. 2016

ijfac

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This research on the modification of cellulose using 4,4-diaminodiphenylether and o-hydroxybenzaldehyde and its application to adsorb Cd 2+ in aqueous solution has been done. The adsorption studies of cellulose and modified cellulose were done by using batch technique. The cellulose and modified cellulose were characterized by FTIR. The FTIR spectra revealed characteristic bands of 1573 cm . Kapasitas adsorpsi dan energi adsorpsi ion Cd 2+ terhadap selulosa adalah 71.43 mg/g dan 4.14 kJ/mol. Sedangkan selulosa termodifikasi menghasilkan kapasitas dan energi adsorpsi sebesar 55.56 mg/g dan 0.13 kJ/mol.

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Peer Reviewed: Plant-Derived Materials for Metal Ion-Selective Binding and Preconcentration

Cited by 52 publications

References 31 publications

<b>Removal of lead(II) ions from aqueous solutions using activated carbon from <i>Militia ferruginea</i> plant leaves</b>

<b>Removal of lead(II) ions from aqueous solutions using activated carbon from <i>Militia ferruginea</i> plant leaves</b>

Competitive Metal Ion Binding to Datura innoxia Root and Stem Tissue Materials

Modification of Cellulose with 4.4 Diaminodiphenylether-O-Hydroxibenzaldehide as Adsorbent and Its Application for Adsorbing Metalic Ion of Cd2+ In Aqueous Solution

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