Ni(II) removal from aqueous effluents by silylated clays

Carvalho, Wagner A.; Vignado, Carolina; Fontana, Juliane

doi:10.1016/j.jhazmat.2007.09.083

Cited by 62 publications

(30 citation statements)

References 28 publications

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“…The maximum value of metal retention occurred approximately at pH 6.0. It can be observed that there is an increase in uptake of Ni ions from 0.172 to 6.38 mg/g in solution with increased pH from 2 to 6 (Carvalho et al 2008). A competition for the surface sorption sites occurred between protons and heavy metal ions.…”

Section: Effect Of Phmentioning

confidence: 96%

Kinetic and equilibrium study of Ni(II) sorption from aqueous solutions onto Peganum harmala-L

Ghasemi

Zahedi

et al. 2014

Int. J. Environ. Sci. Technol.

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In this study, the adsorption behavior of Ni(II) in an aqueous solution system using natural adsorbent Peganum harmala-L was measured via batch mode. The prepared sorbent was characterized by scanning electron microscope, Fourier transform infrared spectroscopy, N 2 adsorptiondesorption and pH zpc . Adsorption experiments were carried out by varying several conditions such as contact time, metal ion concentration and pH to assess kinetic and equilibrium parameters. The equilibrium data were analyzed based on the Langmuir, Freundlich, Temkin and Dubinin-Radushkevich isotherms. Kinetic data were analyzed using the pseudo-firstorder, pseudo-second-order and intra-particular diffusion models. Experimental data showed that at contact time 60 min, metal ion concentration 50 mg/L and pH 6, a maximum amount of Ni(II) ions can be removed. The experimental data were best described by the Langmuir isotherm model as is evident from the high R 2 value of 0.988. The adsorption capacity (q m ) obtained was 68.02 mg/g at an initial pH of 6 and a temperature of 25°C. Kinetic studies of the adsorption showed that equilibrium was reached within 60 min of contact and the adsorption process followed the pseudo-first-order model. The obtained results show that P. harmala-L can be used as an effective and a natural low-cost adsorbent for the removal of Ni(II) from aqueous solutions.

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Section: Effect Of Phmentioning

confidence: 96%

Kinetic and equilibrium study of Ni(II) sorption from aqueous solutions onto Peganum harmala-L

Ghasemi

Zahedi

et al. 2014

Int. J. Environ. Sci. Technol.

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“…It was recorded that lower adsorption of Cu happened at pH higher than 6. This was attributed to the precipitation [13] of Cu ions as Cu (OH) 2 and availability of the biofilm.…”

Section: +mentioning

confidence: 99%

“…This result is similar to [15] which recorded a maximum adsorption for Ni (II) at pH 5 -6. However, [13] reported that Ni ions precipitated at pH 8 due to the formation of nickel hydroxide hence avoided the pH beyond 8.…”

Section: +mentioning

confidence: 99%

“…Large surface area of natural clays also assisted by the edges and the faces of clay particles, accounts for the best capacity of the clay minerals to adsorb heavy metals [12]. A method that uses clays covered with a microorganism allows combining the features of both for an even more competent heavy metals removal [13]. The main objective was to determine the adsorption capacity of Escherichia coli ATC 25922 and Staphylococcus epidermidis RP62A biofilm with kaolinite clay as a support for the removal of Cu (II) and Ni (II) from aqueous solution.…”

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confidence: 99%

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Adsorption of Cu (II) and Ni(II) in Aqueous Solution using Biofilm Supported with Kaolinite Clay

2016

6th International Conference on Biological, Chemical &Amp; Environmental Sciences (BCES-2016) August 8-9, 2016 Pattaya (Thailan

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Abstract-Adsorption of each of the ions Cu (II) and Ni (II) onEscherichia coli ATCC25922 and Staphylococcus epidermidis RP62A supported by kaolinite clay in a batch system was investigated. Equilibrium adsorption capacity was determined to be a function of the solution pH, contact time, and initial metal concentrations. The results obtained from the adsorption experiments were used to understand the driving forces that govern the interaction between metal ions and the biosorbent. Minimum inhibitory concentration (MIC) values of E. coli ATCC 29522 for Cu (II) and Ni (II) are two times greater than S. epidermidis RP62A which means E. coli ATCC 29522 is very resistant to metals than that of S. epidermidis RP62A.The experimental data were analyzed by the Freundlich and Langmuir isotherms. The adsorption kinetics of metal ions best fits the pseudo-second order. The effect of pH on metal ion uptake was studied by performing equilibrium sorption experiments with varying the solution pH from 4 to 8. The result showed the optimum pH for the three metals is at pH 5 with initial concentration of 100 mg/L at contact time of 24 hours with constant temperature of 37⁰C.

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“…Among the known health related effects of nickel are skin allergies, lung fibrosis, variable degrees of kidney and cardiovascular system poisoning and stimulation of neoplastic transformation [3,4]. Adsorption of nickel ions by clay has been the subject of several recent studies [5][6][7][8][9]. It was found that the adsorption of nickel from aqueous solution depends on contact time, amount of adsorbent, solution pH and Nickel concentration.…”

Section: Introductionmentioning

confidence: 99%

Removal of nickel from aqueous solutions using Saudi activated bentonite

Al-Shahrani¹

2011

Sustainability Today

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This research project investigates the application of Saudi activated clay (bentonite) to remove nickel from aqueous solutions. The removal characteristics of nickel ions from aqueous solution using Saudi activated bentonite were investigated under various operating variables like shaking time, solution pH, clay dosage and initial metal concentration. The results showed that the sorption of nickel ions on Saudi activated clay was relatively fast and the equilibrium was reached after 40 min. They also showed that increasing the initial nickel concentration decreased nickel removal percentage due to the saturation of clay with nickel ions. Furthermore, the adsorption of nickel increases from 70 to 100% with an increase in solution pH from 2.0 to 9.0. The adsorption isotherm data were well fitted with both the linearized Langmuir and Freundlich models. Nickel adsorption onto Saudi activated bentonite was well represented by the pseudo-second-order kinetic model.

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Ni(II) removal from aqueous effluents by silylated clays

Cited by 62 publications

References 28 publications

Kinetic and equilibrium study of Ni(II) sorption from aqueous solutions onto Peganum harmala-L

Kinetic and equilibrium study of Ni(II) sorption from aqueous solutions onto Peganum harmala-L

Adsorption of Cu (II) and Ni(II) in Aqueous Solution using Biofilm Supported with Kaolinite Clay

Removal of nickel from aqueous solutions using Saudi activated bentonite

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