Waste electrical and electronic equipments as urban mines in Burkina Faso: Characterization and release of metal particles

Konaté, Francis O.; Ancia, Philippe; Soma, Fousseni; Bougouma, Moussa; Buess‐Herman, C.; Yonli, Arsène H; Vitry, Véronique

doi:10.1016/j.wasman.2021.12.014

Cited by 9 publications

(3 citation statements)

References 42 publications

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“…These correspond to the typical non-metallic part of the PCBs. The particle sizes ranged from 0.5 mm to 1.2 mm, which could be beneficial for the metal extraction [ 18 ].…”

Section: Methodsmentioning

confidence: 99%

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Leaching of Copper Contained in Waste Printed Circuit Boards, Using the Thiosulfate—Oxygen System: A Kinetic Approach

et al. 2022

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The present work is related to the treatment of crushed waste of printed circuit boards (WPCBs) from electrical and electronic devices (WEEE), carrying out the recovery of copper in solution. In the first stage, the studied material was characterized by AAS, SEM-EDS, and XRD. The results revealed significantly high amounts of copper (744.42 mg/g), compared with the rest of the metals present in the sample, mainly iron and zinc. In the second stage of the work, alkali dynamic leaching experiments were carried out in the S2O3−2− O2 medium, evaluating important kinetic variables in order to verify the controlling step of the system and adjust the data to a kinetic model. According to the results obtained from the various experimental tests executed, it was found that in the studied system of S2O3−2− O2, the leaching of copper was preferably adjusted to the model of spherical particles with a shrinking core finding a mixed chemical–diffusive control, with values of Ea = 25.78 kJ/mol and n = 0.22 (for the leaching reagent), indicating that the reaction was controlled by the oxygen transport to the solid–liquid interface and also by the chemical reaction in the surface of particles, obtaining up to 99.82% copper in solution.

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“…These correspond to the typical non-metallic part of the PCBs. The particle sizes ranged from 0.5 mm to 1.2 mm, which could be beneficial for the metal extraction [ 18 ].…”

Section: Methodsmentioning

confidence: 99%

“…The relative composition of the WEEE is 38% ferrous metals, 28% non-ferrous metals, 19% plastics, 4% glass, 1% wood, and 10% others [ 12 , 18 , 19 , 20 ]. Therefore, there is an urgent need to recover the maximum amount of recyclable material from these wastes [ 21 ].…”

Section: Introductionmentioning

confidence: 99%

Leaching of Copper Contained in Waste Printed Circuit Boards, Using the Thiosulfate—Oxygen System: A Kinetic Approach

et al. 2022

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“…WEEE contains more than 1000 kinds of persistent hazardous materials (such as barium (Ba), lithium (Li) and mercury (Hg), etc.) which contaminate the environment and harm human health [6,7], and more than 60% recoverable high-value metals [8][9][10] in 2002 to diminish the environmental contamination effect from brown goods, white goods and batteries [13]. Brown goods refer to relatively light electronic appliances such as computers, radios, audio equipment, and televisions, and white goods are large home appliances such as cookers, refrigerators, freezers, washing machines, tumble driers, and air conditioners [13].…”

Section: Research Backgroundmentioning

confidence: 99%