Adsorption by coniferous leaves of chromium ions from effluent

Cho, Nam-Seok; Aoyama, Masakazu; Seki, Kazuto; Hayashi, Naoaki; S, Doi

doi:10.1007/bf01177738

Cited by 13 publications

(7 citation statements)

References 9 publications

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“…This indicates the non-ideality of total chromium adsorption which in turn may be attributed to the proposed mechanism above. Upon comparing the maximum adsorption capacity (Q) obtained under long term equilibration with values previously reported for low cost adsorbents [21] [22] [26]- [30], the value obtained in this work is among the highest 5%.…”

Section: Adsorption Isothermsmentioning

confidence: 58%

Concurrent Removal and Reduction of Cr(VI) by Wool: Short and Long Term Equilibration Studies

Jumean

Khamis²,

Sara³

et al. 2015

AJAC

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Hexavalent chromium removal from wastewater using sheep wool was investigated at several equilibration periods. The influence of contact time, pH, adsorbent dosage and initial concentration was investigated. Adsorption isotherms for long and short periods were fitted to the Langmuir and Freundlich isotherms. For short contact times, the Langmuir adsorption isotherm was obeyed with no detectable change in the oxidation state but removal percentages did not exceed 90%. Long contact times resulted in more than 99% removal of Cr(VI). A 2-step mechanism for the removal is proposed. Free wool and wool loaded with Cr(VI) were characterized by FTIR and SEM.

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Section: Adsorption Isothermsmentioning

confidence: 58%

Concurrent Removal and Reduction of Cr(VI) by Wool: Short and Long Term Equilibration Studies

Jumean

Khamis²,

Sara³

et al. 2015

AJAC

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“…Compared with other adsorbents ( Table 3), polystyrene tris(2-aminoethyl)amine showed high adsorption capacity. Coconut fibers 29 [12] Palm fibers 14 [12] Barks 12 [13] Coniferous leaves 5 [14] Carbonized tea leaves 43 [15] Quaternized cellulose derivatives 7 [1] Cationized cellulose 64.5 [18] Cationized wood sawdust 39.5 [18] Cationized maize-cob flour 41.6 [18] Activated charcoal 45.24 [19] Cooked tea dust 30.39 [20] Neem sawdust 58.82 [21] Mango sawdust 37.73 [22] Wheat hunk 28.08 [22] Sugarcane bagasse 23.8 [22] Orange peel 19.8 [22] Polystyrene tris-2-(aminoethyl)amine 312.27 This work Figure 10. Langmiur isotherm for the adsorption of Cr (VI) using UV-Vis spectroscopy (T = 25˚C, pH = 5, Contact time = 2 hours, Adsorbent dosage = 10 g/L).…”

Section: Adsorption Isothermsmentioning

confidence: 99%

Hexavalent Chromium Removal and Reduction to Cr (III) by Polystyrene Tris(2-aminoethyl)amine

Odeh¹,

Odeh²,

Khamis³

et al. 2015

AJAC

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A commercially available chelating polymer, polystyrene tris(2-aminoethyl)amine, was used for the removal of chromium from aqueous solution. The influence of pH, contact time, adsorbent dosage and initial Cr (VI) concentration on adsorption was studied. The optimum pH for the removal of Cr (VI) was at pH 5, while optimum contact time and adsorbent dosage were 120 minutes and 10 g/L, respectively. Total chromium and Cr (VI) concentrations were analyzed by ICP-MS and UV-Visible. Adsorption isotherms using Langmuir and Freundlich isotherm models revealed that the data fitted Langmuir isotherm model better than Freundlich with a maximum adsorption capacity of 312.27 mg/g. FTIR spectroscopy, Scanning electron microscopy (SEM) and Energy Dispersive Spectrometry (EDS) analyses were performed on the adsorbent before and after binding Cr (VI). All analyses confirmed the complexation of Cr (VI) to the adsorbent. Desorption experiments using KCl solution indicated 89.3% release of chromium, rendering this method of high potential for adsorbent regeneration.

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“…Flasks with the hinge plates and the corresponding solutions which are in them were densely closed by traffic jams and vigorously stirred up within 5 hours. Then needles were filtered and in filtrates equilibrium concentration of ions of Ni (II) were defined by a photometric method [28].…”

Section: Methodsmentioning

confidence: 99%

“…On the basis of the above, sorption of ions of Ni (II) with use as sorption material of needles of Siberian larch (Larix sibirica) was investigated. In the world literature there are messages about a research of sorption of ions Cr(III) and Cr(VI) needles of larch pre-Jurassic Lárix gmélinii [27] and thin-scaled larch (Larix leptolepis) [28].…”

Section: Introductionmentioning

confidence: 99%

Material Performance of Nickel Ions Adsorption by Larix Sibirica Needles

Denisova¹,

Kharlyamo²,

Galimova³

et al. 2018

IJET

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Adsorption of ions of nickel on alternative sorption material - needles of Siberian larch (Larix sibirica) is investigated at temperatures of 20, 30 and 40 0C. The maximum sorption capacities of needles of Larix sibirica in relation to ions of nickel (II) at temperatures of 20 are determined °C, 30° C, 40° C which made 0,80 mmol/g (47,2 mg/g), 0,87 mmol/g (51,3 mg/g) and 0,92 mmol/g (54,3 mg/g) respectively. Isotherms of adsorption are received and shortchanged with use of models of Langmuir, Friendlich, Temkin and Dubinin-Radushkevich. It is defined that process of adsorption of ions of Ni2+ at a temperature of 20the ° C is best of all described by Friendlich's model (R2 = 0,983), and at temperatures of 30° C and 40° C - the Langmuir model (R2 = 0,995 and 0,996 respectively). By the carried-out calculations it is defined that process of adsorption of ions of Ni2+ needles of Larix sibirica treat processes of physical adsorption as values of energy of adsorption have size less than 8 kJ/mol, and values of energy of Gibbs demonstrate spontaneous course of physical adsorption. Processing of kinetic dependences of processes of adsorption of ions of nickel (II) Larix sibirica needles at three temperatures within diffusive model defined the limiting stages of processes - the mixed diffusion.

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Adsorption by coniferous leaves of chromium ions from effluent

Cited by 13 publications

References 9 publications

Concurrent Removal and Reduction of Cr(VI) by Wool: Short and Long Term Equilibration Studies

Concurrent Removal and Reduction of Cr(VI) by Wool: Short and Long Term Equilibration Studies

Hexavalent Chromium Removal and Reduction to Cr (III) by Polystyrene Tris(2-aminoethyl)amine

Material Performance of Nickel Ions Adsorption by Larix Sibirica Needles

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