Adsorption of some bivalent heavy metal ions from aqueous solutions by manganese nodule leached residues

Das, Nigamananda; Jana, Rajkumar

doi:10.1016/j.jcis.2005.06.064

Cited by 65 publications

(48 citation statements)

References 40 publications

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“…FT-IR spectra of sea nodules (SN), sea nodule residues (SNR) and washed sea nodule residue residues (WSNR, untreated; WSNR-300, heat-treated at 300 ºC; WSNR-400, heat-treated at 400 ºC). SNR with distilled water, the positions of the majority of the bands in its IR spectrum remained unchanged, except for the disappearance of the absorption band at 1072 cm -1 presumably due to the loss of a small amount of loosely bound NH 3 or sulphate on washing (Das and Jana 2006). The sulphate is most likely generated from the impurities in the coal employed during the reductionroasting of SN.…”

Section: Characteristics Of Leached Residuementioning

confidence: 98%

“…Chemical analyses for major and minor constituents in various samples were undertaken as described earlier by wet chemical methods and by AAS (Avanta instrument, GBC Scientific Equipment, Braeside, Victoria, Australia), respectively (Das and Jana 2006). TG/DTA studies of SNR were carried out in static air using a Shimadzu DT 40 thermal analyzer at a heating rate of 10 ºC/min using α-Al 2 O 3 as the reference material.…”

Section: Characterization Of Samplesmentioning

confidence: 99%

“…These residues contain oxides/oxyhydroxides of Fe, Mn, Al and Si with a reasonable porosity and surface area. In view of the above characteristics, one can envisage the use of such leached residues as an effective adsorbent for a variety of species (Parida et al 2005;Das and Jana 2006). The present study was designed to explore the feasibility of using leached sea nodule residue, generated in the reduction-roast ammoniacal leaching of sea nodules, as an adsorbent for the removal of phosphate ions from contaminated water bodies.…”

Section: Introductionmentioning

confidence: 99%

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Adsorptive Removal of Phosphate Ions Using Leached Sea Nodule Residue Generated by the Reduction–Roasting Ammoniacal Leaching Process

Behera

Satapathy

Randhawa

et al. 2010

Adsorption Science & Technology

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The present study was an attempt to find an alternative use for the leached residue generated after the selective extraction of Cu(II), Ni(II) and Co(II) ions during the reduction-roasting ammoniacal leaching of Indian Ocean sea nodules, so that the latter may be used as an adsorbent for the removal of phosphate ions from aqueous media. Physicochemical characterization revealed that the leached residue was a complex mixture of oxides of mainly manganese and iron along with MnCO 3 . Adsorption studies of the water-washed leached residue (WSNR), varying the pH, phosphate ion concentration, WSNR dosage, heat treatment and the presence of interfering anions in solution, indicated that phosphate (P) ion uptake increased with increasing heat-treatment temperature and pH, to attain a maximum value at 400 ºC and a pH value of ca. 5.0, but thereafter decreased on increasing the heat-treatment temperature and pH further. The adsorption data were best fitted by the Freundlich isotherm model. Desorption studies showed that > 90% of the adsorbed phosphate ions could be desorbed from WSNR after stirring at pH ≥ 10.0 for 2 h. The results obtained could be useful in a consideration of the use of WSNR as an adsorbent for the removal of phosphate ions from contaminated water bodies.

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Section: Characteristics Of Leached Residuementioning

confidence: 98%

Section: Characterization Of Samplesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Adsorptive Removal of Phosphate Ions Using Leached Sea Nodule Residue Generated by the Reduction–Roasting Ammoniacal Leaching Process

Behera

Satapathy

Randhawa

et al. 2010

Adsorption Science & Technology

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“…4) and Freundlich (Eq. 5) models (Das and Jana 2006). where C e is equilibrium concentration (mg L -1 ); q e is amount adsorbed at equilibrium (mg g -1 ); b is Langmuir isotherm constants related to affinity of adsorbent toward metal ion and Q o is adsorption maxima or adsorption capacity (mg g -1 ).…”

Section: Adsorption Isothermsmentioning

confidence: 99%

“…Residues generated after hydrometallurgical treatment of manganese nodules or polymetallic sea nodules contain oxides/oxyhydroxides of Fe, Mn, aluminum (Al) and silicon (Si) with a reasonable porosity and surface area (Jana et al 1999a, b;Acharya et al 1999). The residues generated in [NH 4 OH/(NH 4 )SO 4 ] leaching have been effectively utilized as an adsorbent for a variety of heavy metals (Parida et al 2004;Das and Jana 2006). In the present work, studies were aimed to investigate the sorption characteristics of residue, generated in the reduction roasting-ammoniacal leaching of manganese nodules (Jana et al 1999a), for the removal of Ni(II) ions from its aqueous solution.…”

Section: Introductionmentioning

confidence: 99%

Application of manganese nodules leaching residue for adsorption of nickel(II) ions from aqueous solution

Randhawa

Dwivedi

Jana

2013

Int. J. Environ. Sci. Technol.

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Deep ocean manganese nodules are significant futuristic resource of copper, nickel and cobalt. After recovery of these valuable metals, a huge quantity of residue (*70 % of ore body) is generated. In the present paper, investigations carried out for the application of washed manganese nodule leaching residue (wMNR) for the removal of nickel (Ni) ions from aqueous solution by adsorption are described. Several parameters have been varied to study the feasibility of using wMNR as potential adsorbent for remediation of Ni(II)-contaminated water. The adsorption kinetics followed pseudo-first-order equation, and the rate of adsorption increased with solution temperature. Kinetics data of Ni(II) adsorption were also discussed using diffusion models of Webber-Morris and Dumwald-Wagner models. The equilibrium data were best fitted into Langmuir adsorption isotherm, and the maximum adsorption capacity was found to be 15.15 mg g -1 at pH 5.5 and temperature 303 K, which decreased to 10.64 mg g -1 upon raising the solution temperature to 323 K. The activation energy for Ni(II) adsorption onto wMNR was 9.56 kJ mol -1 indicated physical sorption. Desorption studies showed successful regeneration of adsorbent and recovery of Ni. This process can be utilized for removal and recovery of Ni from the industrial effluent.

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Morphological, transport, and adsorption properties of ethylene vinyl acetate/polyurethane/bentonite clay composites

Dlamini

Mishra

Mamba

2011

J of Applied Polymer Sci

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The effect of polyurethane (PU) foam on the morphological and transport properties of ethylene vinyl acetate (EVA) with 9% vinyl acetate and the potential application of 3%bentonite/28.5% PU/68.5% EVA composites fabricated via the melt-blending method in heavy-metal extraction from water systems were investigated. EVA did not swell in water, whereas the PU/EVA blend attained a maximum percentage of deionized water uptake of 2.158 mol %. A 3% bentonite/28.5% PU/68.5% EVA composite blend successfully removed 90% of Pb 2þ from an aqueous solution with an initial concentration of 30 mg/L, whereas 3% bentonite/97% EVA could only extract 7.323% of Pb 2þ ions. Pb 2þ adsorption was found to obey the Langmuir adsorption isotherm and pseudosecond-order kinetic model. Thermodynamic studies demonstrated that the adsorption was favorable at room temperature and the uptake of Pb 2þ was mostly by physical adsorption, as also indicated by the value n ¼ 2.449 (where n is an empirical parameter indicating transport mode) from the Freundlich adsorption isotherm.

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Adsorption of some bivalent heavy metal ions from aqueous solutions by manganese nodule leached residues

Cited by 65 publications

References 40 publications

Adsorptive Removal of Phosphate Ions Using Leached Sea Nodule Residue Generated by the Reduction–Roasting Ammoniacal Leaching Process

Adsorptive Removal of Phosphate Ions Using Leached Sea Nodule Residue Generated by the Reduction–Roasting Ammoniacal Leaching Process

Application of manganese nodules leaching residue for adsorption of nickel(II) ions from aqueous solution

Morphological, transport, and adsorption properties of ethylene vinyl acetate/polyurethane/bentonite clay composites

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