Recovery of Platinum and Palladium Ions from Aqueous Solution Using Grape Stalk Waste

Mavhungu, Avhafunani; Mbaya, Richard; Moropeng, Mapula Lucey

doi:10.7763/ijcea.2013.v4.324

Cited by 7 publications

(11 citation statements)

References 22 publications

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“…At the optimal dosage, maximal recovery of 99.8% Au(III) was obtained followed by 87.7% Pt(IV) and then 72.7% Pd(II).Comparisons with unmodified magnetic iron oxide nanoparticles yielded percentage recoveries of 100% Au(III), 88.1% Pt(IV) and 67.3% Pt(IV). Studies by Mavhungu et al [46] and Hariani et al [47] obtained similar results. These studies demonstrate that increase in percentage recoveries with increase in adsorbent dosage result from rise in vacant active sites on the adsorbent surface.…”

Section: Effect Of Adsorbent Dosagesupporting

confidence: 60%

“…A study by Ju et al [48] using a red alga, Galdieria sulphuraria also recovered gold and palladium precious metals ions with high efficiency at pH 2.5. The adsorption capacity tends to decrease with increase in pH because at a high pH; there might be less absorption of metal ions due to decreasing chloride anions from the metal salts [46]. On the other hand, at a pH of 1.5 the competition between positively charged hydrogen and precious metal ions might be higher therefore resulting in the lower recoveries observed [34].…”

Section: Effect Of Phmentioning

confidence: 99%

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Magnetic Iron Oxide Nanoparticles Modified with Moringa Seed Proteins for Recovery of Precious Metal Ions

Amuanyena¹,

Kandawa‐Schulz²,

Kwaambwa³

2019

JBNB

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Precious metals are highly demanded economic value metals that require to be recovered from industrial wastes and electronic used products (e-waste). They are such as gold (Au) as well as Platinum Group Metals (PGMs) for instance palladium (Pd) and platinum (Pt). The study was conducted to test the magnetic iron oxide nanoparticles modified with Moringa oleifera seed proteins as adsorbent for recovery of Au(III), Pd(II) and Pt(IV) from aqueous solutions. Different functional groups responsible for adsorption, morphology, thermal stability, and surface charges of the nanoparticles were characterized with FTIR, SEM, TGA and Zeta potential respectively. Batch adsorption method was used, and precious metal ions percentage recovery was measured using ICP-OES. The effects of pH, initial adsorbate concentration, adsorption agitation time and adsorbent dosage were studied at room temperature of 25˚C. Au(III) yielded a maximal recovery of 99.8%, followed by Pt(IV) with 87.7%, then Pd(II) with 72.7% at a pH 2.5, 10 mg/L initial adsorbate concentration, 120 minutes agitation time and 0.065 g adsorbent dosage. These results suggested that modified iron oxide nanoparticles were effective in selective recovery of the precious metal ions.

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Section: Effect Of Adsorbent Dosagesupporting

confidence: 60%

Section: Effect Of Phmentioning

confidence: 99%

Magnetic Iron Oxide Nanoparticles Modified with Moringa Seed Proteins for Recovery of Precious Metal Ions

Amuanyena¹,

Kandawa‐Schulz²,

Kwaambwa³

2019

JBNB

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“…The effect of normality on the percentage metal removal of platinum from aqueous solution with crash catalyst was studied and as shown in figure 4. It is cleaner that the production of platinum to 0.22 gm from aqueous improved with increase normality percentage to 6 because hydrogen ions are strong competing with oxygen and partly extraction with positive metal ion and partly that the solution concentration influences the chemical speciation of metal ions as platinum [7].…”

Section: Results and Discussion: 1-effect Of Normality Of Aqua-riga Solutionmentioning

confidence: 99%

“…Horticultural material contains proteins, polysaccharides and lignin which are related with utilitarian gatherings in charge of metal particle adsorption. The inexhaustible regular event and nearness of substantial measure of surface practical gatherings make different agrarian squanders great choices manufactured adsorbents [7]. Suzana Dragulovic,"treatment of platinum group metals (PGMs) recovery from spent car catalyst.…”

Section: Introductionmentioning

confidence: 99%

Extraction of Platinum From Spent Catalyst as pt/Al2O3 in aqua regia

Jaafar¹

2019

Djes

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Spent catalyst from Biji Refining contained valuable metals such as platin. This study focus on platinum extraction in aqua regia solution. Three factors effecting on the process were study including dissolution temperature, normality of aqua regia and agitation speed. The ideal conditions for process give 0.22 gm platinum extraction in dissolution temperature 80 C0, normality for aqua regia was 6 and 120 rpm mixing speed for solution

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“…Heavy metal removal is generally carried out using electro-dialysis, precipitation, adsorption, ion exchange, coagulation and floatation [9][10][11][12][13][14][15][16][17][18][19][20] . Heavy metal removal from the wastewater by using adsorption is commonly investigated area of research [20][21][22][23][24][25][26] . The wastewater generally contains more than heavy metals.…”

Section: Introductionmentioning

confidence: 99%

Multicomponent and Competitive Sorption of Heavy Metals- Review on Significant Research and Studies

2017

JCBSC

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Heavy metals have acute and chronic effect on human beings and other living organisms also. It is very important to identify the risk and take steps for removal of heavy metals from the effluents. The industries such as paint, pigment, catalyst, fine chemicals, coating, automobile, electronics, battery etc. uses heavy metals in some or other form. They treat the wastewater by using conventional methods. Heavy metal removal from the wastewater by using adsorption is commonly investigated area of research. The wastewater generally contains more than heavy metals. It is envisaged to study the effect of presence of one heavy metal on removal of other heavy metal. It can help selective removal of specific heavy metal and selection proper adsorbent. Most of these investigations indicated that the presence of one metal has significant effect on sorption of other metal. This effect can be positive or negative. Competitive adsorption indicates competition for adsorbent sites. In cooperative mechanism, the presence of one metal has positive effect on sorption of other. The present review intends to study research and studies on the competitive adsorption of heavy metals on different materials.

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Recovery of Platinum and Palladium Ions from Aqueous Solution Using Grape Stalk Waste

Cited by 7 publications

References 22 publications

Magnetic Iron Oxide Nanoparticles Modified with Moringa Seed Proteins for Recovery of Precious Metal Ions

Magnetic Iron Oxide Nanoparticles Modified with Moringa Seed Proteins for Recovery of Precious Metal Ions

Extraction of Platinum From Spent Catalyst as pt/Al2O3 in aqua regia

Multicomponent and Competitive Sorption of Heavy Metals- Review on Significant Research and Studies

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