Adsorption of platinum(IV) and palladium(II) from aqueous solution by magnetic cross-linking chitosan nanoparticles modified with ethylenediamine

Zhou, Limin; Xu, Jianping; Liang, Xin; Liu, Zhirong

doi:10.1016/j.jhazmat.2010.06.062

Cited by 207 publications

(76 citation statements)

References 24 publications

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“…The recovery of platinum(IV) and palladium(II) from aqueous solutions using ethylenediamine-modified magnetic chitosan nanoparticles (EMCN) as sorbent was studied by Zhou et al (2010) [81]. The preparation of magnetic chitosan nanoparticles involved the addition of basic precipitant solution (NaOH) into a W/O microemulsion system.…”

Section: Magnetic Particles With Organic Coatingmentioning

confidence: 99%

“…The q e reached a maximum value at pH 3 and started to decrease at pH 4 [71]. The effect of pH on the adsorption of Pt(IV) and Pd(II) by ethylenediamine-modified magnetic chitosan nanoparticles (EMCN) was examined by Zhou et al (2010) [81]. The results of the study revealed that maximum adsorption occurred at highly acidic regions for both Pt(IV) and Pd(II).…”

Section: Factors Influencing Magnetic Solid Phase Extraction Of Precimentioning

confidence: 99%

“…At low pH, platinum and palladium are usually present in solution in its most stable form, i.e., Pt(IV) and Pd(II). Due to this, Pt and Pd can form stable complexes especially with amino group chelation sites of EMCN, due to their characteristics of soft acid [81].…”

Section: Factors Influencing Magnetic Solid Phase Extraction Of Precimentioning

confidence: 99%

“…Generally, adsorption on magnetic adsorbents is characterized by fast kinetics as most studies reported equilibrium and maximum adsorption capacity was reached approximately after 60 min [3,14,53,58,60,81], although 12-24 h was also reported [49,76,82]. The kinetics of Au(III) ion adsorption on chitosan coated magnetic nano-adsorbent at pH 2 was investigated by Chang and Chen (2006) [82].…”

Section: Adsorption Timementioning

confidence: 99%

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Magnetic Adsorbents for the Recovery of Precious Metals from Leach Solutions and Wastewater

Aghaei

Alorro

Encila

et al. 2017

Metals

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Precious metals which include the platinum group, gold, and silver, play indispensable roles in high technology industries of the modern world due to their outstanding physical and chemical properties. As a result of diminishing availability of mineral sources, increasing demand, and environmental concerns, the recovery of precious metals from both leaching and industrial waste solutions is becoming a very important technology. Magnetic solid phase extraction (MSPE) is a technique that has received substantial consideration in the separation and recovery of precious metals because of the many advantages it offers compared to conventional methods. This technique is based on the extraction of different analytes from solutions using solid adsorbents with magnetic properties. This review focuses on different types of magnetic adsorbents, the main procedures used for synthesis, characterization and their application in precious metals recovery based on recently published literatures.

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Section: Magnetic Particles With Organic Coatingmentioning

confidence: 99%

Section: Factors Influencing Magnetic Solid Phase Extraction Of Precimentioning

confidence: 99%

Section: Factors Influencing Magnetic Solid Phase Extraction Of Precimentioning

confidence: 99%

Section: Adsorption Timementioning

confidence: 99%

See 2 more Smart Citations

Magnetic Adsorbents for the Recovery of Precious Metals from Leach Solutions and Wastewater

Aghaei

Alorro

Encila

et al. 2017

Metals

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“…However, decreasing the solution of pH resulted in lower adsorption percentage by the activated pistachio nut shell. It can be concluded that platinum uptake should be carried out under acidic media 25 .…”

Section: Effect Of Solution Ph On Platinum Adsorption (%)mentioning

confidence: 99%

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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Adsorptive Recovery of Palladium and Platinum From Acidic Chloride Media Using Chemically Modified Persimmon Tannin

Gurung¹,

Adhikari²,

Inoue³

et al. 2016

Rare Metal Technology 2016

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Adsorption of platinum(IV) and palladium(II) from aqueous solution by magnetic cross-linking chitosan nanoparticles modified with ethylenediamine

Cited by 207 publications

References 24 publications

Magnetic Adsorbents for the Recovery of Precious Metals from Leach Solutions and Wastewater

Magnetic Adsorbents for the Recovery of Precious Metals from Leach Solutions and Wastewater

Platinum uptake from chloride solutions using biosorbents

Adsorptive Recovery of Palladium and Platinum From Acidic Chloride Media Using Chemically Modified Persimmon Tannin

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