A new approach to modification of natural adsorbent for heavy metal adsorption

Argun, Mehmet Emin; Dursun, Şükrü

doi:10.1016/j.biortech.2007.04.037

Cited by 173 publications

(81 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…For porous adsorbents, the diffusion of the adsorbate molecules or ions into the pores is also to be taken into account to find a suitable kinetic model for the process (Ghasemi et al 2013a, b). Intra-particular diffusion (Argun and Dursun 2008) is characterized by the relationship between specific sorption (q t ) and the squared root of time (t 1/2 ). This relation is shown as follows:…”

Section: Kinetic Studiesmentioning

confidence: 99%

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.

View full text Add to dashboard Cite

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.

show abstract

Section: Kinetic Studiesmentioning

confidence: 99%

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.

View full text Add to dashboard Cite

show abstract

“…The model has been widely used by researchers on kinetic study of metal ions adsorption onto various derived adsorbents (Rengaraj et al 2003(Rengaraj et al , 2004Li et al 2011;Argun and Dursun 2008). Batch mode experiments were carried out by varying the concentration of the metal solutions at 27 °C and at pH 3.0 for Cr(VI) metal ion and at pH 6.0 for Cd(II), Pb(II) and Ni(II) metal ions used in this study.…”

Section: Lagergren Rate Equationmentioning

confidence: 99%

Kinetic study on adsorption of Cr(VI), Ni(II), Cd(II) and Pb(II) ions from aqueous solutions using activated carbon prepared from Cucumis melo peel

Manjuladevi¹,

Anitha²,

Manonmani³

2018

Appl Water Sci

113

View full text Add to dashboard Cite

The adsorption of Cr(VI), Ni(II), Cd(II) and Pb(II), ions from aqueous solutions by Cucumis melo peel-activated carbon was investigated under laboratory conditions to assess its potential in removing metal ions. The adsorption behavior of metal ions onto CMAC was analyzed with Elovich, intra-particle diffusion rate equations and pseudo-first-order model. The rate constant of Elovich and intra-particle diffusion on CMAC increased in the sequence of Cr(VI) > Ni(II) > Cd(II) > Pb(II). According to the regression coefficients, it was observed that the kinetic adsorption data can fit better by the pseudo-first-order model compared to the second-order Lagergren's model with R 2 > 0.957. The maximum adsorption of metal ions onto the CMAC was found to be 97.95% for Chromium(VI), 98.78% for Ni(II), 98.55% for Pb(II) and 97.96% for Cd(II) at CMAC dose of 250 mg. The adsorption capacities followed the sequence Ni(II) ≈ Pb(II) > Cr(VI) ≈ Cd(II) and Ni(II) > Pb(II) > Cd(II) > Cr(VI). The optimum adsorption conditions selected were adsorbent dosage of 250 mg, pH of 3.0 for Cr(VI) and 6.0 for Ni(II), Cd(II) and Pb(II), adsorption concentration of 250 mg/L and contact time of 180.

show abstract

“…Además, otros autores atribuyen a la lignina un predominante papel en la adsorción de metales ya que posee mayor velocidad que la celulosa y hemicelulosa para adherirse a los metales (Mehmet, Argun, & Dursun, 2008 …”

Section: Resultados Y Discusión Análisis Bromatológicounclassified

Caracterización estructural de la cascarilla de arroz modificada como adsorbente alternativo y eficiente para la remoción de Cr (VI) en solución

Herrera

Anaguano

Suárez

2013

rev.investig.agrar.ambient.

View full text Add to dashboard Cite

arroz modificada como adsorbente alternativo y eficiente para la remoción de Cr (VI) en solución Structural characterization of the husks from modified rice as an alternative absorbant and effective for the removal of Cr (VI) in solution ResumenEste artículo describe la caracterización estructural de la cascarilla de arroz modificada mediante un proceso de oxidación avanzada con el reactivo Fenton, dicha transformación fue llevada a cabo con el propósito de incrementar el número de sitios activos sobre la superficie de este material y generar por tanto, un adsorbente con mayor capacidad de remoción de los iones Cr (VI) en solución, en comparación con la cascarilla de arroz natural. La caracterización del material modificado fue realizada mediante distintas técnicas experimentales que incluyeron, el análisis de los grupos funcionales presentes en la superficie del adsorbente a través de la espectroscopia de infrarrojo con reflectancia difusa, (DRIFT), así mismo, un análisis de la morfología de la superficie de la cascarilla mediante microscopia electrónica de barrido, (SEM), un análisis bromatológico y termogravimétrico, (TGA). Todas estas evaluaciones fueron llevadas a cabo sobre el adsorbente previo y posterior a su proceso de modificación. Los resultados de DRIFT señalan un ligero desplazamiento y una atenuación en las frecuencias de vibración de los grupos funcionales implicados en la modificación estructural, en tanto que el análisis SEM indicó cambios apreciables en la morfología del material adsorbente. Por su parte, el análisis bromatológico mostró modificaciones considerables en los porcentajes de los componentes del material, cuya presencia fue ratificada mediante el análisis TGA, al alcanzar su descomposición a las temperaturas esperadas. En definitiva, todos los resultados confirman la modificación estructural del adsorbente evaluado. 21

show abstract

A new approach to modification of natural adsorbent for heavy metal adsorption

Cited by 173 publications

References 37 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

Kinetic study on adsorption of Cr(VI), Ni(II), Cd(II) and Pb(II) ions from aqueous solutions using activated carbon prepared from Cucumis melo peel

Caracterización estructural de la cascarilla de arroz modificada como adsorbente alternativo y eficiente para la remoción de Cr (VI) en solución

Contact Info

Product

Resources

About