Adsorption of Nickel in Aqueous Solution onto Natural Maghnite

Abstract

<p class="MsoNormal" style="text-align:justify;"> <span lang="FR">Maghnite clay obtained from Tlemcen, Algeria was investigated to remove heavy metal ion from wastewater. Thus, the present study includes the adsorption of Ni(II) in aqueous solution on maghnite clay through the process of adsorption under various conditions (with variable concentration of metal ion, temperature, pH and mixing time). Increasing pH favours the removal of metal ions till they are precipitated as the insoluble hydroxides. The uptake is rapid with maxi</span><span lang="FR">mum adsorption being observed within 10 min for Ni(II). In addition, the results obtained from adsorption isotherm indicated that these data can be better fitted with the Langmuir and Freundlich equations than the Dubinin</span><span lang="FR">-</span><span lang="FR">Radushke</span><span lang="FR">- </span><span lang="FR">vich (D-R) equation.</span><span lang="EN-US"><o:p></o:p></span> </p

Adsorption of toluene into commercial organoclay in liquid phase: Kinetics, equilibrium and thermodynamics

“…From the data presented it can be concluded that this adsorbent material has great affinity for the contaminant. Furthermore, the process of adsorption with this alternative adsorbent stands out from others such as organophilic maghnite, studied by Zenasni et al, which obtained the maximum amount adsorbed of 0.06 mmol/g for initial toluene concentration of 2.71 ppm. Regarding the time of equilibrium, this removal can be considered fast when compared with other adsorbents, such as activated carbon studied by Souza et al.…”

“…The Spectrogel commercial organoclay presented promising results for toluene removal when compared to other alternative adsorbents such as the composite poly(4‐vinylpyridinium)‐maghnite studied by Zenasni et al which showed q max of 5.86 mg/g (0.06 mmol/g), and Chitin‐ and Chitosan‐based adsorbents studied by Mohamed and Ouki, which presented q max of 2.5 mg/g (0.03 mmol/g) and took 8 h to reach equilibrium, while the organoclay study showed q max of approximately 0.27 mmol/g and less than 3 h for equilibrium.…”

“…The adsorption of toluene onto commercial organoclay was well described by mass transfer in external film model and MSAM isotherm model at 288.15 K, D‐R isotherm model at 298.15 K and Sips isotherm model at 308.15 K. Thermodynamic study showed that toluene adsorption onto the adsorbent was physical, endothermic, and spontaneous. Due to its low cost, non‐toxicity, and adsorption capacity, this adsorbent can be considered one of the effective options to remove toluene from aqueous solutions, especially when compared to other adsorbents such as composite poly(4‐vinylpyridinium)‐maghnite and Chitin‐ and Chitosan‐based adsorbents …”

Valorisation and Modification of Saharan Clay for Removal of Cu(II), Ni(II), Co(II) and Cd(II) from Aqueous Solutions

“…Then, 20 mL of APTES was added dropwise during vigorous stirring. The dispersion was refluxed at 100ºC for 24 h [25]. The modified kaolin was centrifuged and washed with toluene, followed by volume mixture between ethanol and distilled water (75/25 v%), respectively.…”

Adsorption of Congo Red from Aqueous Solution Using CTAB-Kaolin from Bechar Algeria

“…The pH of the solution was adjusted with NaOH or HCl solutions. The amount of dye adsorbed per unit mass of CTAB-kaolin was calculated by using the mass balance equation given in Equation (1) [27].…”