Present status of the recycling of waste electrical and electronic equipment in Korea

Lee, Jae-chun; Song, Hyo Teak; Yoo, Jong‐Shin

doi:10.1016/j.resconrec.2007.01.010

Cited by 250 publications

(86 citation statements)

References 6 publications

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“…Many recycling techniques of copper from waste PCBs have been developed such as pyrometallurgy [6], hydrometallurgy [7][8][9], bioleaching [10,11] and mechanical process [4]. Recently, to obtain high purity products of copper from waste PCBs, many new processes were proposed such as leaching-electrowinning [12,13], mechanical separation-electrometallurgy [14], and vacuum metallurgy [15].…”

Section: Introductionmentioning

confidence: 99%

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Size-controlled preparation of Cu2O nanoparticles from waste printed circuit boards by supercritical water combined with electrokinetic process

Xiu

Zhang

2012

Journal of Hazardous Materials

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Section: Introductionmentioning

confidence: 99%

“…However, all of the above-mentioned processes can only recover metallic copper [4][5][6][7][8][9][10][11][12][13][14][15][16][17]. In our previous study [18], Cu 2 O/TiO 2 nanomaterials were prepared from waste PCBs by EK process.…”

Section: Introductionmentioning

confidence: 99%

Size-controlled preparation of Cu2O nanoparticles from waste printed circuit boards by supercritical water combined with electrokinetic process

Xiu

Zhang

2012

Journal of Hazardous Materials

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“…The special increase in Multidisciplinary Chemistry -contents not related with a specific branch of chemistry, but with a general approach to chemical science (Thomson Reuters, 2011updated)-and Chemical Engineering -contents related with the chemical transformation of raw materials into products, design and operation of efficient and cost-effective plants and equipment for chemical production (Thomson Reuters, 2011updated)-probably has to do with the development of new processes oriented to material recovery or chemical treatment of hazardous wastes. Some good examples of recycling processes that require chemistry knowledge are the recycling of plastic materials by chemical tertiary treatment versus secondary thermo mechanical treatment, with much less energy expense and a better quality product (Al-Salem et al, 2009), and the complex metallurgic processes like hydrometallurgy to recover valuable metals from the ever-growing amounts of electronic waste (Lee et al, 2007) (Ongondo et al, 2010). These two examples can additionally explain the strong presence of the Materials Science Macro-category in the cited SC's overlay.…”

Section: Discussionmentioning

confidence: 99%

Tracking the evolution of waste recycling research using overlay maps of science

et al. 2012

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Tracking the evolution of research in waste recycling science (WRS) can be valuable for environmental agencies, as well as for recycling businesses. Maps of science are visual, easily readable representations of the cognitive structure of a branch of science, a particular area of research or the global spectrum of scientific production. They are generally built upon evidence collected from reliable sources of information, such as patent and scientific publication databases. This study uses the methodology developed by to make a "double overlay map" of WRS upon a basemap reflecting the cognitive structure of all journal-published science, for the years 2005 and 2010. The analysis has taken into account the cognitive areas where WRS articles are published and the areas from where it takes its intellectual nourishing, paying special attention to the growing trends of the key areas. Interpretation of results lead to the conclusion that extraction of energy from waste will probably be an important research topic in the future, along with developments in general chemistry and chemical engineering oriented to the recovery of valuable materials from waste. Agricultural and material sciences, together with the combined economics, politics and geography field, are areas with which WRS shows a relevant and ever increasing cognitive relationship.

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“…Currently, pyrometallurgical process [7,8] and hydrometallurgical process [9][10][11] are the two traditional approaches for the recovery of metals from waste PCBs. In addition, many researchers have used various mechanical methods as pre-treatment to separate metals from waste PCBs [2,5].…”

Section: Introductionmentioning

confidence: 99%

Co-treatment of waste printed circuit boards and polyvinyl chloride by subcritical water oxidation: Removal of brominated flame retardants and recovery of Cu and Pb

Xiu

Zhang

2014

Chemical Engineering Journal

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h i g h l i g h t sWe report an effective process for co-treatment of waste PCBs and PVC. Brominated flame retardants can be decomposed efficiently in co-treatment. Dechlorination of PVC was complete and safe. Cu and Pb in waste printed circuit boards can be recovered efficiently. Sn and Cr can be immobilized efficiently in the residue after co-treatment. t r a c tIn this work, an effective process for removal of brominated flame retardants (BFRs) and recovery of Cu and Pb from waste printed circuit boards (PCBs) was developed. In the process, waste PCBs and polyvinyl chloride (PVC) were co-treated by subcritical water oxidation (SBWO). PVC was used as a hydrochloric acid source and waste PCBs was used as a neutralizing reagent for the produced HCl. The dechlorination of PVC, removal of BFRs, and recovery of Cu and Pb could be achieved simultaneously by the one-step SBWO reaction. Experimental results showed that the dechlorination of PVC was complete when SBWO temperature exceeded 250°C. SBWO co-treatment was high efficient for the leaching of Cu and Pb from waste PCBs, and XRD spectra indicated that Sn was immobilized as SnO 2 in the residue after co-treatment. The optimum SBWO co-treatment conditions were temperature of 350°C, time of 60 min, solidliquid ratio of 1:9 g/ml, and PVC-to-PCBs ratio of 1:1, respectively. In the optimized co-treatment, 98.9% of Cu and 80% of Pb were recovered, while the leaching efficiencies of Sn and Cr were 15.3% and 3.9%, respectively. Meanwhile, approximately 100% of the bromine was changed into HBr and enriched in water after co-treatment.

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Present status of the recycling of waste electrical and electronic equipment in Korea

Cited by 250 publications

References 6 publications

Size-controlled preparation of Cu2O nanoparticles from waste printed circuit boards by supercritical water combined with electrokinetic process

Size-controlled preparation of Cu2O nanoparticles from waste printed circuit boards by supercritical water combined with electrokinetic process

Tracking the evolution of waste recycling research using overlay maps of science

Co-treatment of waste printed circuit boards and polyvinyl chloride by subcritical water oxidation: Removal of brominated flame retardants and recovery of Cu and Pb

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