Adsorption of Co2+, Ni2+, Cu2+ and Zn2+ from 0.5 M NaCl and major ion sea water on a mixture of δ-MnO2 and amorphous FeOOH

Tripathy, S. Swarupa; Kanungo, S. B.

doi:10.1016/j.jcis.2004.09.054

Cited by 109 publications

(35 citation statements)

References 19 publications

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“…The pH of point of zero charge (denoted as pH PZC ) of the adsorbent was determined by the solid addition method (Tripathy and Kanungo 2005). The other physical properties were determined by common methods.…”

Section: Methodsmentioning

confidence: 99%

Adsorption of metal anions of vanadium(V) and chromium(VI) on Zr(IV)-impregnated collagen fiber

et al. 2007

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The metal anions of vanadium (V) and chromium (VI) in aqueous solution can be effectively adsorbed by Zr(IV)-impregnated collagen fiber (ZrICF). The maximum adsorption capacity of V(V) takes place within the pH range of 5.0 to 8.0, while that of Cr(VI) is within the pH range of 6.0 to 9.0. When the initial concentration of metal ions was 2.00 mmol L −1 and the temperature was 303 K, the adsorption capacity of V(V) on Zr-ICF was 1.92 mmol g −1 at pH 5.0, and the adsorption capacity of Cr(VI) was 0.53 mmol g −1 at pH 7.0. As temperature increased, the adsorption capacity of V(V) increased, while that of Cr(VI) was almost unchanged. The adsorption isotherms of the anionic species of V(V) and Cr(VI) can be fit by the Langmuir equation. The adsorption rate of V(V) follows the pseudo-first-order rate model, while the adsorption rate of Cr(VI) follows the pseudo-second-order rate model. Furthermore, ZrICF shows high adsorption selectivity to V(V) in the mixture solution of V(V) and Cr(VI). Practical applications of ZrICF could be expected in consideration of its performance in adsorption of V(V) and Cr(VI).Keywords Zr(IV) · Collagen fiber · Adsorbent · Vanadium(V) · Chromium(VI) · Metal anion · Adsorption Abbreviations q eAdsorption capacity at equilibrium (mmol g −1 ) C e Concentration at equilibrium (mmol L −1 ) q max Maximum adsorption capacity of metal anion (mmol g −1 )b Coefficient related to the strength of adsorption, b = k a /k d (k a is the rate constant of adsorption, k d is the rate constant of desorption) q t Adsorption capacity (mmol g −1 ) at time t (min) k 1 Rate constant of pseudo-first-order rate model (min −1 ) k 2 Rate constant of pseudo-second-order rate (mmol g −1 min −1 ) k i Intraparticle diffusion rate constant (mmol g −1 min −0.5 )

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Section: Methodsmentioning

confidence: 99%

Adsorption of metal anions of vanadium(V) and chromium(VI) on Zr(IV)-impregnated collagen fiber

et al. 2007

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“…Same procedure as described above was repeated to study the effect of electrolyte on the adsorption of Cu(II) at different pH values by preparing 50 mg L -1 Cu(II) solution in 0.1 M KNO 3 . The adsorption process and point of zero charge are greatly affected in the presence of electrolyte (Tripathy and Kanungo 2005). The effect of electrolyte was studied along with pH and for this 0.1 M KNO 3 was used as electrolyte.…”

Section: Effect Of Phmentioning

confidence: 99%

Adsorption studies of Cu(II) on Boston fern (Nephrolepis exaltata Schott cv. Bostoniensis) leaves

Rao

Khan

2016

Appl Water Sci

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Adsorption studies were done on Boston fern leaves for the effective removal of Cu(II) ions from aqueous solution. It has been tested for the first time for heavy metal adsorption from aqueous solution. This promising material has shown remarkable adsorption capacity towards Cu(II) ions which confirm its novelty, ease of availability, non-toxic nature, cheapness, etc., and give the main innovation to the present study. The adsorbent was analyzed by FT-IR, SEM and EDS. The effect of pH, contact time, initial metal ion concentration and temperature on the adsorption was investigated using batch process to optimize conditions for maximum adsorption. The adsorption of Cu(II) was maximum (96 %) at pH 4. The experimental data were analyzed by Langmuir, Freundlich and Tempkin isotherms. The kinetic studies of Cu(II)were carried out at room temperature (30°C) in the concentration range 10-100 mg L -1 . The data obtained fitted well with the Langmuir isotherm and pseudo-secondorder kinetics model. The maximum adsorption capacity (q m ) obtained from Langmuir adsorption isotherm was found to be 27.027 mg g -1 at 30°C. The process was found to be exothermic and spontaneous in nature. The breakthrough and exhaustive capacities were found to be 12.5 and 37.5 mg g -1 , respectively. Desorption studies showed that 93.3 % Cu(II) could be desorbed with 0.1 M HCl by continuous mode.

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“…1). The pH at point zero charge (pH PZC ) was obtained from intersection point of the curve at DpH ¼ 0 [28][29][30].…”

Section: Determination Of Point Of Zero Chargementioning

confidence: 99%

Cercis siliquastrum Tree Leaves as an Efficient Adsorbent for Removal of Ag(I): Response Surface Optimization and Characterization of Biosorption

Zolgharnein

Shariatmanesh

Asanjarani

2013

CLEAN Soil Air Water

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The Cercis siliquastrum tree leaves are introduced as a low cost biosorbent for removal of Ag(I) from aqueous solution in a batch system. FT-IR, XRD analysis, and potentiometric titration illustrate that the adsorption took place and the acidic functional group (carboxyl) of the sorbent was involved in the biosorption process. In addition, it was observed that the pH beyond pH pzc 4.4 is favorable for the removal procedure. The effect of operating variables such as initial pH, temperature, initial metal ion concentration, and sorbent mass on the Ag(I) biosorption was analyzed using response surface methodology (RSM). The proposed quadratic model resulting from the central composite design approach (CCD) fitted very well to the experimental data. The optimum condition obtained with RSM was an initial concentration of Ag(I) of 85 mg L À1 , pH ¼ 6.3 and sorbent mass 0.19 g. The applicability of different kinetic and isotherm models for current biosorption process was evaluated. The isotherm, kinetic, and thermodynamic studies showed the details of sorbate-sorbent behavior. The competitive effect of alkaline and alkaline earth metal ions during the loading of Ag(I) was also considered.

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Adsorption of Co2+, Ni2+, Cu2+ and Zn2+ from 0.5 M NaCl and major ion sea water on a mixture of δ-MnO2 and amorphous FeOOH

Cited by 109 publications

References 19 publications

Adsorption of metal anions of vanadium(V) and chromium(VI) on Zr(IV)-impregnated collagen fiber

Adsorption of metal anions of vanadium(V) and chromium(VI) on Zr(IV)-impregnated collagen fiber

Adsorption studies of Cu(II) on Boston fern (Nephrolepis exaltata Schott cv. Bostoniensis) leaves

Cercis siliquastrum Tree Leaves as an Efficient Adsorbent for Removal of Ag(I): Response Surface Optimization and Characterization of Biosorption

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