Recovery of high purity precious metals from printed circuit boards

Park, Young Jun; Fray, D. J.

doi:10.1016/j.jhazmat.2008.09.043

Cited by 424 publications

(228 citation statements)

References 13 publications

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“…The recovery rate varies depending on technologies, knowledge, and economic viabilities. In developing countries, the recovery yield of precious metals is very poor due to unskilled operations (Chatterjee and Kumar, 2009); in developed countries, more than 90%, but less than 100%, of recovery rates are achieved in silver, palladium, and gold (Park and Fray, 2009). However, recycling units in developed countries face shortages of collected quantities and thereby operations become economically non-viable (Chatterjee and Kumar, 2009).…”

Section: Smelters' Behaviormentioning

confidence: 99%

When and for whom would e-waste be a treasure trove? Insights from a network equilibrium model of e-waste flows

Wakolbinger¹,

Toyasaki²,

Nowak³

et al. 2014

International Journal of Production Economics

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Section: Smelters' Behaviormentioning

confidence: 99%

When and for whom would e-waste be a treasure trove? Insights from a network equilibrium model of e-waste flows

Wakolbinger¹,

Toyasaki²,

Nowak³

et al. 2014

International Journal of Production Economics

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“…algae, bacteria and yeast) [7], synthetic materials including mesoporous adsorbents [6], chitosan derivatives [8] and graphitized carbon black [9] as well as modified silica [10][11][12]. Silica is widely used as an adsorbent due to its excellent thermal and mechanical stability, easily dispersed in a liquid medium, it has large surface area and well-modified surface properties.…”

Section: Introductionmentioning

confidence: 99%

Functionalization of Silica Coated on Iron Sand Magnetic Material with Diethylenetriamine

Fahmiati¹,

Nuryono²,

Suyanta³

2018

Asian J. Chem.

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Diethylenetriamine (DETA) functionalized silica coated on magnetic material of iron sand (MM@SiO2-DETA) has been synthesized by sol-gel method. Synthesis was carried out by coating magnetic material of iron sand as the core with diethylenetriamine-modified silica using sodium silicate solution and N 1 -(3-trimethoxysylilpropyl)diethylenetriamine (TMPSDETA) as silica and diethylenetriamine group sources, respectively. Several variations of mole ratio of silica to DETA at a constant weight of magnetic material were examined to evaluate the effect of the coating agent amount on the properties of MM@SiO2-DETA. MM@SiO2-DETA was characterized with Fourier transform infrared spectrophotometer, X-ray diffraction, scanning electron microscope with energy dispersive spectroscope (SEM-EDX), vibrating sample magnetometer and thermal gravimetric analysis. Stability test of product toward acidic solution and the effect of mole ratio of SiO2 and DETA on adsorption of Au(III) also evaluated. The characterization results indicated that SiO2 and DETA groups were successfully attached to the surface of magnetic material to form MM@SiO2-DETA. Characteristic bands of the vibration of propyl and amino groups derived from DETA; indicating that DETA was successfully reacted with MM@SiO2. Coating of magnetic material with SiO2 exhibits the decrease in Ms up to 38.2 emu/g and 23.5 emu/g after coating with SiO2-DETA. Thermalgravimetric analysis indicate thermal stability of the resulted product of MM@SiO2-DETA (1:1) up to 350 °C. Dissolution by acid solution can be diminished by coating magnetic material with silica. Gold(III) adsorption capacity of MM@SiO2-DETA (1:0.5), MM@SiO2-DETA (1:1) and MM@SiO2-DETA (1:2) are found to be higher than 92 %.

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“…Hence development of an efficient method of obtaining silver is a very important. The most interesting and practical method seems to be hydrometallurgy [1,2].…”

Section: Introductionmentioning

confidence: 99%

Studies of extractive removal of silver(I) from chloride solutions

Wejman-Gibas

Pilśniak-Rabiega

2016

E3S Web Conf.

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Abstract. For efficient recovery of silver(I) from chloride solutions, amine extractants were used. The effect of the type of diluent, extractant and chloride concentration, contact time and reextraction were studied. It was found that the best diluent for this process was xylene. Extraction of silver depended on concentration of hydrochloric acid, sodium chloride and extractant and additionally on the contact time. Reextraction of Ag(I) ions from the loaded organic phase showed that it can be removed only little using NH3 H2O, NaOH, NH4NO3, and NaNO3 as the stripping agents.

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Recovery of high purity precious metals from printed circuit boards

Cited by 424 publications

References 13 publications

When and for whom would e-waste be a treasure trove? Insights from a network equilibrium model of e-waste flows

When and for whom would e-waste be a treasure trove? Insights from a network equilibrium model of e-waste flows

Functionalization of Silica Coated on Iron Sand Magnetic Material with Diethylenetriamine

Studies of extractive removal of silver(I) from chloride solutions

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