Adsorption of dysprosium ions on activated charcoal from aqueous solutions

Qadeer, Riaz; Hanif, Javed

doi:10.1016/0008-6223(94)00135-m

Cited by 45 publications

(26 citation statements)

References 10 publications

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“…The band at 1633 cm −1 was related to H O H bending vibrations of water molecules adsorbed on Na-Mt [29][30][31]. The infrared spectrum of Na-Mt had a band at 1033 cm −1 , which was attributed to the Si O Si bending vibration [31,32]. The bands of quartz near 790 cm −1 and the bands at 523 and 464 cm −1 were typical O Si O bending vibrations [32].…”

Section: Ft-irmentioning

confidence: 96%

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Adsorption behavior and mechanism of chlorophenols onto organoclays in aqueous solution

Zhang

et al. 2015

Colloids and Surfaces A: Physicochemical and Engineering Aspect

106

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Section: Ft-irmentioning

confidence: 96%

“…The infrared spectrum of Na-Mt had a band at 1033 cm −1 , which was attributed to the Si O Si bending vibration [31,32]. The bands of quartz near 790 cm −1 and the bands at 523 and 464 cm −1 were typical O Si O bending vibrations [32].…”

Section: Ft-irmentioning

confidence: 98%

Adsorption behavior and mechanism of chlorophenols onto organoclays in aqueous solution

Zhang

et al. 2015

Colloids and Surfaces A: Physicochemical and Engineering Aspect

106

View full text Add to dashboard Cite

“…However, the table shows that the sorbent has comparable sorption properties for the binding of selected REEs in slightly acidic to neutral solutions. Some materials have significantly higher sorption properties, such as activated charcoal for Dy(III) (Qadeer and Hanif 1995), phosphorous functionalized sorbent for Nd(III) (Park and Tavlarides 2010), and iminodiacetic resin (Xiong et al 2006) or Sargassum biomass (Diniz and Volesky 2005a) for Yb(III). However, in most cases the DETA-functionalized chitosan magnetic nano-based particles have comparable sorption properties for selected REEs.…”

Section: Comparison Of Sorption Properties With Other Sorbentsmentioning

confidence: 99%

Diethylenetriamine-functionalized chitosan magnetic nano-based particles for the sorption of rare earth metal ions [Nd(III), Dy(III) and Yb(III)]

et al. 2015

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The recovery of three rare earth (RE) metals ions [Yb(III), Dy(III) and Nd(III), belonging to heavy, mild and light REs, respectively] was investigated using hybrid chitosan-magnetic nano-based particles functionalized by diethylenetriamine (DETA). The effect of pH on sorption performance was analyzed: the optimum initial pH value was found close to 5 (equilibrium pH value close to 6.5). The nanometric size of sorbent particles (30-50 nm) minimized the contribution of resistance to intraparticle diffusion on the control of uptake kinetics, which is efficiently modeled using the pseudo-second order rate equation: under selected experimental conditions the contact time required for reaching equilibrium was less than 1 h. Sorption isotherms were efficiently modeled using the Langmuir equation: maximum sorption capacities reached about 50 mg metal g -1 , regardless of the RE. The temperature had a very limited effect on sorption capacity (in the range 300-320 K). The thermodynamic parameters were determined: the sorption was endothermic (positive values of DH°), spontaneous (negative values of DG°) and contributed to increasing the disorder of the system (positive values of DS°). The three REs have similar sorption properties on DETA-functionalized chitosan magnetic nano-based particles: the selective separation of these elements seems to be difficult. The sorbed metal ions can be removed from loaded sorbents using thiourea, and the sorbent can be recycled for at least five sorption/desorption cycles with a limited loss in sorption performance (by less than 6 %). The saturation magnetization was close to 20 emu g -1 ; this means that nano-based superparamagnetic particles can be readily recovered by an external magnetic field, making the processing of these materials easy.

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“…Other factors that can affect the adsorption in a significant way are the granulometric distribution, ash content, high mechanical resistance, the activation process to which the carbon was submitted [2,3], viscosity [29], temperature of the liquid phase [1,11,22,24], contact time of the adsorbent with the solution [1,18,22,24,28], and solubility of the adsorbate [5].…”

Section: Introductionmentioning

confidence: 99%