Chemically modified olive stone: A low-cost sorbent for heavy metals and basic dyes removal from aqueous solutions

Aziz, A.; Ouali, Mohand Saïd; Elandaloussi, El Hadj; Menorval, L. C. De; Lindheimer, Marc

doi:10.1016/j.jhazmat.2008.06.117

Cited by 134 publications

(50 citation statements)

References 30 publications

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“…The starting premise of this work was to develop an efficient adsorbent based on halloysite for the removal of dyes by performing a cheaper and simple modification under "mild" operating conditions. Chemical activation can be selected and several prior works have been reported [11,26,27]. Acid activation, which has in the past been universally used in ore dressing process, is an important aspect for chemical activation.…”

Section: Introductionmentioning

confidence: 99%

Removal of methylene blue from aqueous solutions by adsorption onto chemically activated halloysite nanotubes

Luo

Zhang

Zhao

et al. 2011

Korean J. Chem. Eng.

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This study examines the adsorption behavior of methylene blue (MB) from aqueous solutions onto chemically activated halloysite nanotubes. Adsorption of MB depends greatly on the adsorbent dose, pH, initial concentration, temperature and contact time. The Langmuir and Freundlich models were applied to describe the equilibrium isotherms and the Langmuir model agrees very well with experimental data. The maximum adsorption capacities for MB ranged from 91.32 to 103.63 mg·g −1 between 298 and 318 K. A comparison of kinetic models applied to the adsorption data was evaluated for pseudo-first-order, pseudo-second-order, Elovich and intra-particle diffusion equation. The results showed the adsorption process was well described by the pseudo-second-order and intra-particle diffusion mode. Thermodynamic parameters suggest that the adsorption is spontaneous and endothermic. The obtained results indicated that the product had the potential to be utilized as low-cost and effective alternative for dye removal in wastewater.

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Section: Introductionmentioning

confidence: 99%

Removal of methylene blue from aqueous solutions by adsorption onto chemically activated halloysite nanotubes

Luo

Zhang

Zhao

et al. 2011

Korean J. Chem. Eng.

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“…Acidification of raw precursor with sulfuric acid is acknowledged as important factor responsible for textural properties of obtained carbon (Aziz et al, 2009). Acids remove numerous metallic species absorbed during the growth of the plant which is significant for making oxygen functional groups available for other reactions including reactions that are taking part in adsorption mechanism.…”

Section: Resultsmentioning

confidence: 99%

Characterization of a low cost Lagenaria vulgaris based carbon for ranitidine removal from aqueous solutions

Bojić

Momčilović

Milenković³

et al. 2017

Arabian Journal of Chemistry

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Practical aspects of Lagenaria vulgaris shell conversion to activated carbon were examined along with its use in ranitidine adsorption. Kinetics and isotherms of adsorption onto Lagenaria vulgaris carbon (LVC) were correlated to several theoretical adsorption models. The best fit was found in the case of Langmuir and pseudo-second-order model indicating monolayer adsorption. The influence of pH under kinetic study showed slightly hindered adsorption below pH 4. The optimal adsorbent dosage was set to 1 g/L. LVC was characterized by several complementary techniques, including wet chemical techniques such as Boehm's titrations and determination of pH PZC and pH of LVC, which revealed neutral nature of the adsorbent. N 2 sorptometry determined specific surface area of 665 m 2 /g and significant ratio of micropores in the sample with maximum wall's diameter of 2.2 nm. Fourier transform infrared spectroscopy (FTIR) confirmed the role of lignin and cellulose in the formation of the final LVC structure. Porous structure of the material was proved by using scanning electron microscopy. Preparation of LVC material drew attention as an easy and low-cost process for production of a highly efficient adsorbent which

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“…2. In order to illustrate the distinct attributions, the corresponding assignments identified for the olive kernels are listed in Table 3 according to previous CP/MAS 13 C NMR studies of organic matter [4,5,19]. The Olive kernel spectrum shows signals attributable to carbon atoms of the heterogeneous lignocellulosic matrix.…”

Section: Olive Kernel Characterizationmentioning

confidence: 99%

“…Despite the environmental benefits of using this biomass as a fuel, some problems such as air pollution (carbon monoxide, nitrogen oxides, and particulates such as soot and ash produced by combustion) remain. A more recent utilization of olive kernel consists in its use as a biosorbent of heavy metal ions such as chromium (III) and (VI) and cadmium [3][4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Understanding the physicochemical properties of olive kernel to be used as a potential tool in the development of phenol-formaldehyde wood adhesive

Moubarik

Barba

Grimi

2015

International Journal of Adhesion and Adhesives

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Chemically modified olive stone: A low-cost sorbent for heavy metals and basic dyes removal from aqueous solutions

Cited by 134 publications

References 30 publications

Removal of methylene blue from aqueous solutions by adsorption onto chemically activated halloysite nanotubes

Removal of methylene blue from aqueous solutions by adsorption onto chemically activated halloysite nanotubes

Characterization of a low cost Lagenaria vulgaris based carbon for ranitidine removal from aqueous solutions

Understanding the physicochemical properties of olive kernel to be used as a potential tool in the development of phenol-formaldehyde wood adhesive

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