Recovery of Gold(III), Palladium(II), and Platinum(IV) by Aminated Lignin Derivatives

Parajuli, Durga; Kawakita, Hidetaka; Inoue, Katsutoshi; Funaoka, Masamitsu

doi:10.1021/ie0603518

Cited by 138 publications

(54 citation statements)

References 22 publications

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“…The results show that the activated pistachio nut shell and rice husk are very effective for the removal of platinum ions from aqueous solutions, and the maximum monolayer adsorption capacities, Q max , of platinum uptake obtained by the activated pistachio nut shell and rice husk were comparable with the data presented by scientific literature 11,20,32,33 . The adsorption capacities of activated pistachio nut shell and rice husk were much higher than that of commercial adsorbents such as activated carbon but similar adsorption capacities to other adsorbents was obtained as shown in Table 3.…”

Section: Langmuir Isothermssupporting

confidence: 78%

Platinum uptake from chloride solutions using biosorbents

2013

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Present work investigates platinum uptake from synthetically prepared, dilute platinum-bearing solutions using biomass residues, i.e. pistachio nut shell and rice husk, which are abundant in Turkey, and provides a comparison between these two biosorbents. Effects of the different uptake parameters, sorbent dosage, contact time, temperature and pH of solution on platinum uptake (%) were studied in detail on a batch sorption. Before the pistachio nut shell was activated, platinum uptake (%) was poor compared to the rice husk. However, after the pistachio nut shell was activated at 1000 °C under an argon atmosphere, the platinum uptake (%) increased two-fold. The pistachio nut shell (original and activated) and rice husk were shown to be better than commercially available activated carbon in terms of adsorption capacity. These two sorbents have also been characterized by FTIR and SEM. Adsorption equilibrium data best complied with the Langmuir isotherm model. Maximum adsorption capacities, Q max , at 25 °C were found to be 38.31 and 42.02 mg.g -1 for the activated pistachio nut shell and rice husk, respectively. Thermodynamic calculations using the measured ∆H°, ∆S° and ∆G° values indicate that the uptake process was spontaneous and endothermic. The experimental data were shown to be fit the pseudo-second-order kinetic model.

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Section: Langmuir Isothermssupporting

confidence: 78%

Platinum uptake from chloride solutions using biosorbents

2013

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“…1. was observed. Compared with immobilized by primary amine and diethylamine [8], higher degree of amination was achieved in this study. This result proved high accomplishment of the amination reaction of dimethylamine to active side chain and some of hydroxyl groups were attached with dimethylamine as well.…”

Section: Elemental Analysismentioning

confidence: 85%

“…and Zn(II) were not adsorbed by the gel. In our previous study crosslinked lignophenol gel was found to be able to adsorb only Au(III) [7][8][9]. The aminated lignophenol gels EN-lignin and PA-lignin have shown some affinity also for Pd(II) and Pt(IV).…”

Section: Kinetics Of Adsorptionmentioning

confidence: 91%

Selective Recovery of Precious Metals by a Novel Lignin Gel

Khunathai

Parajuli

Adhikari

et al. 2007

Journal of Ion Exchange

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For the recovery of precious metals like Au(III), Pd(II) and Pt(IV), dimethylamine immobilized crosslinked, lignophenol gel, a novel lignin gel, was prepared from wood powder. Its adsorption behavior for Au(III), Pt(IV) and Pd(II) ions in hydrochloric acid medium was studied. The gel was found to adsorb all three precious metals quantitatively irrespective of the concentration of hydrochloric acid while it was found to be inert towards other base metals such as Cu(II), Zn(II), Ni(II), and Fe(III). This kind of performance of the novel gel can be promising for the low cost recovery of precious metals from electrical and electronic wastes by utilizing nature friendly materials.

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“…Recently, biosorption technology has been found to be a simple and clean method to recover platinum from aqueous solution. Some of the adsorbents such as orange peel, grape wastes and rice husk (Parajuli et al 2006;Ramesh et al 2008;Parajuli et al 2009) were used for removing toxic elements and recovering precious metals from aqueous solution.…”

Section: Introductionmentioning

confidence: 99%

Study on the adsorption behavior of modified persimmon powder biosorbent on Pt(IV)

Gong

Guo

Liang

et al. 2015

Int. J. Environ. Sci. Technol.

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A glycine-modified persimmon powder was used as biosorbent for platinum adsorption in aqueous solution. The combined effects of modifying agent amount, modifying time and temperature on Pt(IV) adsorption by persimmon biosorbent were investigated, from which the optimum modification conditions with modifying agent amount of 50 %, temperature of 333 K and contact time of 4.0 h were determined. The influences of solution initial pH, solid-to-liquid ratio, contact time, temperature and initial concentration on the Pt(IV) adsorption were studied systematically by batch experiments. The optimum modification conditions were determined as follows: chemical reagent amount of 50 %, temperature of 333 K and contact time of 4.0 h. From the adsorption kinetic analysis, it was found that the adsorption kinetics of glycine-modified persimmon powder followed a pseudo-second-order kinetic model. The adsorption isotherms of the crude persimmon powder and glycine-modified persimmon powder were analyzed with the BET-type adsorption isotherm. The adsorption mechanism of Pt(IV) on the glycine-modified persimmon was considered to be adsorption-reduction mechanism. The results achieved from this study indicated that the novel persimmon adsorbent could be applied to recover trace Pt(IV) ions from a concentrated chloride solution.

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Recovery of Gold(III), Palladium(II), and Platinum(IV) by Aminated Lignin Derivatives

Cited by 138 publications

References 22 publications

Platinum uptake from chloride solutions using biosorbents

Platinum uptake from chloride solutions using biosorbents

Selective Recovery of Precious Metals by a Novel Lignin Gel

Study on the adsorption behavior of modified persimmon powder biosorbent on Pt(IV)

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