Sorption equilibria of cobalt(II) on two types of Indian soils — the natural ion exchangers

Rawat, J. P.; Iraqi, S.M. Umar; Singh, R. P.

doi:10.1016/0927-7757(96)03700-4

Cited by 16 publications

(2 citation statements)

References 12 publications

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“…Naturally, depending on the characteristics of the metal and the adsorbent surface, positive values of ΔGº can be reached which indicate weak chemical interactions and non-spontaneous process, such as reported for Co in Indian soils (Rawat et al 1996). In such cases, mobilization of the metal to soil solution might occur.…”

Section: Resultsmentioning

confidence: 96%

Sorption of Cadmium in Some Soil Amendments for In Situ Recovery of Contaminated Soils

Zenteno

Freitas

Fernandes

et al. 2013

Water Air Soil Pollut

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Although Cd concentrations in uncontaminated soils are usually low, pollution of soils by Cd from different sources of contamination pose problems. The application of soil amendments to increase plant production has been used as a viable alternative for recovery of soils contaminated with Cd. However, emphasis needs to be placed on the nature of Cd sorption processes in order that the amendments can be managed appropriately. A range of materials including vermicompost, sugarcane filter cake, palm kernel pie, lime, phosphate rock, and zeolite were used for the sorption studies. Total and nonspecific Cd sorption was estimated by batch experiments, and specific sorption was obtained by the difference between the former and the latter. Best adsorbents for specific Cd sorption from soil amendments were lime and zeolite. Langmuir adsorption isotherms fitted reasonably well in the experimental data, and their constants were evaluated, with R 2 values from 0.80 to 0.99. The maximum adsorption capacity of Cd(II) was higher for mineral amendments than for organic amendments and ranged from 0.89 to 10.86 gkg −1. The small value (0.08 Lmg −1) of the constant related to the energy of adsorption indicated that Cd was bound weakly to the palm kernel pie. Thermodynamic parameter, the Gibbs free energy, was calculated for each system, and the negative values obtained confirm that the adsorption processes were spontaneous. The values of separation factor, R L , which has been used to predict affinity between adsorbate and adsorbent were between 0 and 1, indicating that sorption was very favorable for Cd(II).

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Section: Resultsmentioning

confidence: 96%

Sorption of Cadmium in Some Soil Amendments for In Situ Recovery of Contaminated Soils

Zenteno

Freitas

Fernandes

et al. 2013

Water Air Soil Pollut

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“…Adsorption Capacity (q e ) of Co Literature Kaolinite 0.92 [46] Soil 1.50 [47] Marine bacterium 4.38 [48] Nedalco sludge 11.71 [49] Eerbeek sludge 12.34 [49] Coir pith 12.82 [50] Brown seaweed 20.63 [51] Myriophyllum spicatum 43.40 [18] Mixed waste 37.45 Current study…”

Section: Methodsmentioning

confidence: 95%

Using Agricultural Mixed Waste as a Sustainable Technique for Removing Stable Isotopes and Radioisotopes from the Aquatic Environment

et al. 2023

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In the current study, dried ground mixed waste of olive waste and water hyacinth was subjected to the treatment of wastewater contaminated with stable or radioactive cobalt and cesium. Contact time, temperature, amount of adsorbent, metal ion concentration and pH-value were evaluated as the most potent factors that affect the adsorption process. Concentrations of Co and Cs ions before and after treatment are measured using ICP-OES technique. Moreover, kinetic and equilibrium isotherm parameters were investigated by explaining the equilibrium data by induction of two isotherms, “Langmuir” and “Freundlich”. Experimental results indicated that more than 85% of 60Co and 134Cs were efficiently removed from spiked wastewater after one hour of contact time by using 0.2 g of dried mixed waste. The optimal time to remove Cs+ and Co2+ was 50 and 90 min, respectively. The kinetic study showed that the adsorption of Cs+ and Co2+ were better suited to the second order. The most favorable pH value was at a range of 6–7 for Cs+ and 5–6 for Co2+. R2 values were higher at the Freundlich isotherm, indicating that the adsorption process was taking place according to Freundlich isotherm at all temperatures for Co2+ and Cs+ ions.

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Solid phase extraction–inductively coupled plasma spectrometry for adsorption of Co(II) and Ni(II) from radioactive wastewaters by natural and modified zeolites

Malekpour

Edrisi

Hajialigol

et al. 2011

J Radioanal Nucl Chem

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Sorption equilibria of cobalt(II) on two types of Indian soils — the natural ion exchangers

Cited by 16 publications

References 12 publications

Sorption of Cadmium in Some Soil Amendments for In Situ Recovery of Contaminated Soils

Sorption of Cadmium in Some Soil Amendments for In Situ Recovery of Contaminated Soils

Using Agricultural Mixed Waste as a Sustainable Technique for Removing Stable Isotopes and Radioisotopes from the Aquatic Environment

Solid phase extraction–inductively coupled plasma spectrometry for adsorption of Co(II) and Ni(II) from radioactive wastewaters by natural and modified zeolites

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