Precious metal recovery from waste printed circuit boards using cyanide and non-cyanide lixiviants - A review

Waste Management

Volumn 45, Issue , 2014, Pages 258-271

  Akcil, Ata ^a   Erust, Ceren ^a   Gahan, Chandra Sekhar ^a,b   Ozgun, Mehmet ^a   Sahin, Merve ^a   Tuncuk, Aysenur ^a  

^a SULEYMAN DEMIREL UNIVERSITY   (Turkey)

^b CENTRAL UNIVERSITY OF RAJASTHAN   (India)

Author keywords

Cyanide; E waste; Metal; Precious; Thiosulphate; Thiourea

Indexed keywords

CYANIDES; EFFLUENT TREATMENT; EFFLUENTS; ELECTRONIC EQUIPMENT; ELECTRONIC WASTE; GROUNDWATER; HEALTH RISKS; HEAVY METALS; LEACHING; LIFE CYCLE; METALS; ORGANIC POLLUTANTS; POLYCYCLIC AROMATIC HYDROCARBONS; PRECIOUS METALS; PRINTED CIRCUIT BOARDS; RECYCLING; THERMOELECTRIC EQUIPMENT; THIOUREAS; TIMING CIRCUITS; WASTE DISPOSAL; WASTE INCINERATION; AROMATIC COMPOUNDS; AROMATIC HYDROCARBONS; INCINERATION; POLLUTION; PRINTED CIRCUITS; RECOVERY; WASTES;

ELECTRICAL WASTES; ELECTRONIC DEVICE; ENVIRONMENTAL THREATS; FLUE GAS CLEANING; PRECIOUS; RECYCLING TECHNOLOGY; THIOSULPHATES; WASTE PRINTED CIRCUIT BOARD; E-WASTES;

METAL RECOVERY;

AQUA REGIA; BROMIDE; CHEMICAL COMPOUND; CHLORIDE; COPPER; CYANIDE; GOLD; IODINE; POLYCHLORINATED BIPHENYL; SILVER; SULFURIC ACID; THIOSULFATE; THIOUREA; UNCLASSIFIED DRUG;

CYANIDE; LEACHING; PRECIOUS METAL; SOLID WASTE; WASTE DISPOSAL;

AQUA REGIA LEACHING; CHEMICAL PROCEDURES; COST; CYANIDATION; CYANIDE LEACHING; EFFLUENT; ELECTRONIC WASTE; ENVIRONMENTAL PROTECTION; GREEN CHEMISTRY; HUMAN; HYDROMETALLURGICAL PROCESS; IODINE LEACHING; LANDFILL; METAL EXTRACTION; METAL RECOVERY; PRINTED CIRCUIT BOARD; PRIORITY JOURNAL; PYROMETALLURGICAL PROCESS; REVIEW; THIOSULPHATE LEACHING; THIOUREA LEACHING; WASTE DISPOSAL;

EID: 84947048493     PISSN: 0956053X     EISSN: 18792456     Source Type: Journal    
DOI: 10.1016/j.wasman.2015.01.017     Document Type: Article

References (145)

1. Abbruzzese, C., Fornari, P., Mesidda, R., Veglió, F., Ubaldini, S., 1995. Thiosulphate leaching for gold hydrometallurgy. Hydrometallurgy 39, 265-276.
2. Akcil, A., 2010. A new global approach of cyanide management: international cyanide management code for the manufacture, transport, and use of cyanide in the production of gold. Miner. Process. Extr. Metall. Rev. 31, 135-149.
3. Andrews, D., Raychaudhuri, A., Frias, C., 2000. Environmentally sound technologies for recycling secondary lead. J. Power Sources 88 (1), 124-129.
4. Arslan, F., Sayiner, B., 2009. Ammoniacal thiosulphate leaching of Ovacik gold ore. In: Ozbayoğlu, G. (Ed.), Mineral Processing on the Verge of the 21st Century. Balkema, Rotterdam, pp. 517-522.
5. Aylmore, M.G., Muir, D.M., 2001. Thiosulfate leaching of gold-a review. Miner. Eng. 14 (2), 135-174.
6. Bas, A.D., Deveci, H., Yazici, E.Y., 2013. Bioleaching of copper from low grade scrap TV circuit boards using mesophilic bacteria. Hydrometallurgy 138, 65-70.
7. BCC, 2005. Electronic Waste Recovery Business. Report ID: MST037A, 182. Business Communications Company Inc.
8. Birloaga, I., Michelis, I.D., Ferella, F., Buzatu, M., Vegliò, F., 2013. Study on the influence of various factors in the hydrometallurgical processing of waste printed circuit boards for copper and gold recovery. Waste Manage. 33, 935-941.
9. Birloaga, I., Coman, V., Kopacek, B., Vegliò, F., 2014. An advanced study on the hydrometallurgical processing of waste computer printed circuit boards to extract their valuable content of metals. Waste Manage. 34, 2581-2586.
10. Brandl, H., Bosshard, R., Weggmann, M., 2001. Computer-munching microbes: metal leaching from electronic scrap by bacteria and fungi. Hydrometallurgy 59 (2-3), 319-326.
11. Breuer, P.L., Jeffrey, M.I., 2000. Thiosulfate leaching kinetics of gold in the presence of copper and ammonia. Miner. Eng. 13 (10-11), 1071-1081.
12. Byerley, J.J., Fouda, S.A., Rempel, G.L., 1973a. Kinetics and mechanism of the oxidation of thiosulfate ions by copper(II) ions in aqueous ammonia solution. J. Chem. Soc., Dalton Trans. 8, 889-893.
13. Byerley, J.J., Fouda, S.A., Rempel, G.L., 1973b. The oxidation of thiosulfate in aqueous ammonia by copper(II) oxygen complexes. Inorg. Nucl. Chem. Lett. 9, 879-883.
14. Byerley, J.J., Fouda, S.A., Rempel, G.L., 1975. Activation of copper(II) ammine complexes by molecular oxygen for the oxidation of thiosulphate ions. J. Chem. Soc., Dalton Trans. 13, 1329-1338.
15. Chemical Market Reporter, 1998. Weekly Magazine, November, p. 23.
16. Chemical Market Reporter, 1999. Weekly Magazine, February, p. 15.
17. Chen, C.K., Lung, T.N., Wan, C.C., 1980. A study of the leaching of gold and silver by acidothioureation. Hydrometallurgy 5, 207-212.
18. Choi, M.S., Cho, K.S., Kim, D.S., Kim, D.J., 2004. Microbial recovery of copper from printed circuit boards of waste computer by Acidithiobacillus ferrooxidans. J. Environ. Sci. Health, Part A 39 (11-12), 2973-2982.
19. Chris, Y., Yuan, H., Zhang, C., McKenna, G., Korzeniewski, C., Li, J., 2003. Experimental studies on cryogenic recycling of printed circuit board. J. Adv. Manuf. Technol. 34, 657-666.
20. Chu, C.K., Breuer, P.L., Jeffrey, M.I., 2003. The impact of thiosulfate oxidation products on the oxidation of gold in ammonia thiosulfate solutions. Miner. Eng. 16, 265-271.
21. Cui, J., Forssberg, E., 2003. Mechanical recycling of waste electric and electronic equipment: a review. J. Hazard. Mater. 99 (3), 243-263.
22. Cui, J., Zhang, L., 2008. Metallurgical recovery of metals from electronic waste: a review. J. Hazard. Mater. 158 (2-3), 228-256.
23. Deschênes, G., Ghali, E., 1988. Leaching of gold from a chalcopyrite concentrate by thiourea. Hydrometallurgy 20, 179-202.
24. Erust, C., Akcil, A., Gahan, C.S., Tuncuk, A., Deveci, H., 2013. Biohydrometallurgy of secondary metal resources: a potential alternative approach for metal recovery. J. Chem. Technol. Biotechnol. 88, 2115-2132.
25. EU, 2012. Directive 2012/19/EU of the European Parliament and of the Council of 8 June 2011 on waste electrical and electronic equipment (WEEE) (recast). Off. J. L., 197/38.
26. Ficeriová, J., Baláž, P., Dutková, E., Gock, E., 2008. Leaching of gold and silver from crushed Au-Ag wastes. Open Chem. J. 2, 6-9.
27. Ficeriová, J., Baláž, P., Gock, E., 2011. Leaching of gold, silver and accompanying metals from circuit boards (PCBs) waste. Acta Montan. Slovaca 16 (2), 128-131.
28. Fleming, C.A., McMullen, J., Thomas, K.G., Wells, J.A., 2003. Recent advances in the development of an alternative to the cyanidation process: thiosulfate leaching and resin in pulp. Miner. Metall. Process. 20 (1), 1-9.
29. Flynn, C.M., McGill, S.L., 1995. Cyanide Chemistry-Precious Metals Processing and Waste Treatment. US Bureau of Mines, NTIS Publication, PB96-117841.
30. Galva, 2013. Bibliografic References. (access on 20.09.13).
31. Gloe, K., Mühl, P., Knothe, M., 1990. Recovery of precious metals from electronic scrap, in particular from waste products of the thick-layer technique. Hydrometallurgy 25 (1), 99-110.
32. Gonen, N., Korpe, E., Yildirim, M.E., Selengil, U., 2007. Leaching and CIL processes in gold recovery from refractory ore with thiourea solutions. Miner. Eng. 20 (6), 559-565.
33. Goosey, M., Kellner, R., 2002. A Scoping Study: End-of-Life Printed Circuit Boards. Intellect and the Department of Trade and Industry, Makati City.
34. Goosey, M., Kellner, R., 2003. Recycling technologies for the treatment of end of life printed circuit boards (PCBs). Circuit World 29 (3), 33-37.
35. Guo, J., Guo, J., Xu, Z., 2009. Recycling of non-metallic fractions from waste printed boards: a review. J. Hazard. Mater. 168 (2-3), 567-590.
36. Gurdal, B., 2008. Gold recovery and optimization from polish waste. Master Thesis, Istanbul Technical University, Institute of Science, January, Istanbul.
37. Gurung, M., Adhikari, B.B., Kawakita, H., Ohto, K., Inoue, K., Alam, S., 2013. Recovery of gold and silver from spent mobile phones by means of acidothiourea leaching followed by adsorption using biosorbent prepared from persimmon tanin. Hydrometallurgy 133, 84-93.
38. Ha, V.H., Lee, J.-C., Jeong, J., Hai, H.T., Jha, M.K., 2010. Thiosulfate leaching of gold from waste mobile phones. J. Hazard. Mater. 178 (1-3), 1115-1119.
39. Ha, V.H., Lee, J.-C., Huynh, T.H., Jeong, J., Pandey, B.D., 2014. Optimizing the thiosulfate leaching of gold from printed circuit boards of discarded mobile phone. Hydrometallurgy 149, 118-126.
40. Habashi, F., 1970. Principles of Extractive Metallurgy: Hydrometallurgy 2. Gordon and Breach, New York.
41. Habashi, F., 1999. Textbook of Hydrometallurgy, second ed., Gordon & Breach Science Publishers, Quebec City, Canada.
42. Hadi, P., Gao, P., Barford, J.P., McKay, G., 2013. Novel application of the nonmetallic fraction of the recycled printed circuit boards as a toxic heavy metal adsorbent. J. Hazard. Mater. 252-253, 166-170.
43. Hagelüken, C., 2006. Recycling of electronic scrap at Umicore precious metals refining. Acta Metall. Slovaca 12, 111-120.
44. Hall, W.J., Williams, P.T., 2007. Separation and recovery of materials from scrap printed circuit boards. Resour. Conversat. Recycling 51 (3), 691-709.
45. Hao, J., Wang, H.F., Song, S.L., 2008. Status of recycling scrap printed circuit boards by pyrolysis. China Resour. Compr. Utilization 26, 30-33.
46. Havlik, T., Orac, D., Petranikova, M., Miskufova, A., 2011. Hydrometallurgical treatment of used printed circuit boards after thermal treatment. Waste Manage. 31, 1542-1546.
47. He, W., Xu, M., Huang, C., Ma, X., Li, G., Huang, J., 2006. WEEE recovery strategies and the WEEE treatment status in China. J. Hazard. Mater. B136, 502-512.
48. Herschlag, V.E., 1941. A procedure for volumetric determination of gold by means of potassium iodide and arsenious acid. Ind. Eng. Chem. 13, 561-563.
49. Hilson, G., Monhemius, A.J., 2006. Alternatives to cyanide in the gold mining industry: what prospects for the future. J. Clean. Prod. 14, 1158-1167.
50. Hu, Y., Zhang, P., Chen, D., Zhou, B., Li, J., Li, X.-W., 2012. Hydrothermal treatment of municipal solid waste incineration fly ash for dioxin decomposition. J. Hazard. Mater. 207-208, 79-85.
51. Huisman, J., 2010. WEEE recast: from 4 kg to 65%: the compliance consequences. 5 March, Bonm: United Nations University, Institute for Sustainability and Peace (UNU-ISP).
52. Huisman, J., Magalini, F., Kuehr, R., Maurer, C., Ogilvie, S., Poll, J., Delgado, C., Artim, E., Szlezak, J., Stevels, A., 2007. 2008 Review of Directive 2002/96 on Waste Electrical and Electronic Equipment. ENV.G.4/ETU/2006/0032, United Nations University, Bonn, Germany, p. 347.
53. ICER, 2000. UK Status Report on Waste from Electrical and Electronic Equipment. Industry Council for Equipment Recycling. .
54. Iji, M., Yokoyama, S., 1997. Recycling of printed wiring boards with mounted electronic components. Circuit World 23, 10-15.
55. Ilyas, S., Anwar, M.A., Niazi, S.B., Ghauri, M.A., 2007. Bioleaching of metals from electronic scrap by moderately thermophilic acidophilic bacteria. Hydrometallurgy 88 (1-4), 180-188.
56. Jacobson, C.A., 1959. Encyclopedia of Chemical Reactions. Reinhold Publishing Co., New York.
57. Jeffrey, M.I., Breuer, P.L., Choo, W.L., 2001. A kinetic study that compares the leaching of gold in the cyanide, thiosulfate and chloride systems. Metall. Mater. Trans. B 32B, 979-986.
58. Kai, T., Hagiwara, T., Haseba, H., Takahashi, T., 1997. Reduction of thiourea consumption in gold extraction by acid thiourea solutions. Chem. Resour. 36 (7), 2757-2759.
59. Kamberović, Ž., Korać, M., Ivšić, D., Nikolić, V., Ranitović, M., 2009. Hydrometallurgical process for extraction of metals from electronic waste-Part I. Metall. J. Metall. 15, 231-244.
60. Kamberović, Ž., Korać, M., Ranitović, M., 2011. Hydrometallurgical process for extraction of metals from electronic waste-Part II, Development of the process for the recovery of copper from printed circuit boards (PCB). Metall. J. Metall. 17, 139-149.
61. Kang, H-Y., Schoenung, J.M., 2005. Electronic waste recycling: a review of U.S. infrastructure and technology options. Resou. Conservation Recycling 45 (4), 368-400.
62. Kiddee, P., Naidu, R., Wong, M.H., 2013a. Metals and polybrominated diphenyl ethers leaching from electronic waste in simulated landfills. J. Hazard. Mater. 252-253, 243-249.
63. Kiddee, P., Naidu, R., Wong, M.H., 2013b. Electronic waste management approaches: an overview. Waste Manage. 33, 1237-1250.
64. Kim, B.-S., Lee, J., Seo, S.-P., Park, Y.-K., Sohn, H., 2004. A process for extracting precious metals from spent printed circuit boards and automobile catalysts. J. Miner. Met. Mater. Soc. 56 (2), 55-58.
65. Kim, E., Kim, M., Lee, J., Jeong, J., Pandey, B.D., 2011. Selective recovery of gold from waste mobile phone PCBs by hydrometallurgical process. J. Hazard. Mater. 198, 206-215.
66. Kinoshita, T., Akita, S., Kobayashi, N., Nii, S., Kawaizumi, F., Takahashi, K., 2003. Metal recovery from non-mounted printed wiring boards via hydrometallurgical processing. Hydrometallurgy 69 (1-3), 73-79.
67. Kononova, O.N., Kholmogorov, A.G., Danilenko, N.V., Goryaeva, N.G., Shatnykh, K.A., Kachin, V.S., 2007. Recovery of silver from thiosulfate and thiocyanate leach solutions by adsorption on anion exchange resins and activated carbon. Hydrometallurgy 88, 189-195.
68. Koyama, K., Tanaka, M., Lee, J.-C., 2006. Copper leaching behavior from waste printed circuit board in ammoniacal alkaline solution. Mater. Trans. 47 (7), 1788-1792.
69. Kuyucak, N., Akcil, A., 2013. Cyanide and removal options from effluents in gold mining and metallurgical processes. Miner. Eng. 50-51, 13-29.
70. Lacoste-Bouchet, P., Deschênes, G., Ghali, E., 1998. Thiourea leaching of copper-gold ore using statistical design. Hydrometallurgy 47, 189-203.
71. Langhans, J.W., Lei, K.P.V., Carnahan, T.G., 1992. Copper-catalyzed thiosulfate leaching of low-grade gold ores. Hydrometallurgy 19, 191-203.
72. Lee, C.H., Tang, L.W., Popuri, S.R., 2011. A study on the recycling of scrap integrated circuits by leaching. Waste Manage. Res. 29 (7), 677-685.
73. Li, G.C., Lu, J.Y., 2010. Experimental study on gold leaching with sodium hypochlorite-iodide. Mining Metall. Eng. 30 (1), 44-46.
74. Li, J., Miller, J.D., 2007. Reaction kinetics of gold dissolution in acid thiourea solution using ferric sulfate as oxidant. Hydrometallurgy 89, 279-288.
75. Li, J., Lu, H., Guo, J., Xu, Z., Zhou, Y., 2007a. Recycle technology for recovering resources and products from waste printed circuit boards. Environ. Sci. Technol. 41 (6), 1995-2000.
76. Li, J., Xu, Z., Zhou, Y., 2007b. Application of corona discharge and electrostatic force to separate metals and nonmetals from crushed particles of waste printed circuit boards. J. Electrostat. 65 (4), 233-238.
77. Li, J., Xu, X., Liu, W., 2012. Thiourea leaching gold and silver from the printed circuit boards of waste mobile phones. Waste Manage. 32 (6), 1209-1212.
78. Liew, F.C., 2008. Pyrometallurgy versus hydrometallurgy. TES-AMM Singapore, 2008. .
79. London Metal Exchange, 2008. https://www.lme.com/, Access date: 26.06.2014.
80. Madenoglu, H., 2005. Recovery of some metals from electronic scrap. Master Thesis, Ege University, Institute of Science, Izmir.
81. Marsden, J.O., House, C.I., 2006. The Chemistry of Gold Extraction, second ed. Society for Mining, Metallurgy and Exploration Inc., Littleton, Colorado, p. 651.
82. Mecucci, A., Scott, K., 2002. Leaching and electrochemical recovery of copper, lead and tin from scrap printed circuit boards. J. Chem. Technol. Biotechnol. 77 (4), 449-457.
83. Molleman, E., Dreisinger, D., 2002. The treatment of copper-gold ores by ammonium thiosulfate leaching. Hydrometallurgy 66 (1-3), 1-21.
84. Montero, R, Guevara, A., De la Torre, E., 2012. Recovery of gold, silver, copper and niobium from printed circuit boards using the column leaching technique. International Mineral Processing Congress (IMPC), September, New Delhi, India, 3513-3519.
85. Mudder, T., 1999. Making Sense of Cyanide. The Gold Institute, Washington, D.C. (USA).
86. Mudder, T.I., Botz, M.M., 2004. Cyanide and society: a critical review. Eur. J. Miner. Process. Environ. Prot. 4, 62-74.
87. Muir, D.M., Aylmore, M.G., 2002. Thiosulfate as an alternative to cyanide for gold processing; issues and impediments. In: Green Processing 2002: International Conference on the Sustainable Processing of Minerals, Cairns, Qld. Carlton, Vic.: AusIMM, pp. 125-133.
88. Murthy, D.S.R., Prasad, P.M., 1996. Leaching of gold silver from miller process dross through non-cyanide leachants. Hydrometallurgy 42, 27-33.
89. Murthy, D.S.R., Kumar, V., Rao, K.V., 2003. Extraction of gold from an Indian lowgrade refractory gold ore through physical beneficiation and thiourea leaching. Hydrometallurgy 68 (1-3), 125-130.
90. Ni, K., Lu, Y., Wang, T., Kannan, K., Gosens, J., Xu, L., Li, Q., Wang, L., Liu, S., 2013. A review of human exposure to polybrominated diphenyl ethers (PBDEs) in China. Int. J. Hyg. Environ. Health 216, 607-623.
91. Ogunniyi, I.O., Vermaak, M.K.G., 2007. Improving printed circuit board physical processing-an overview. In: Proceedings of European Metallurgical Conference, Dusseldorf, Germany.
92. Ogunniyi, I.O., Vermaak, M.K.G., 2009. Froth flotation for beneficiation of printed circuit boards comminution fines: an overview. Miner. Process. Extr. Metall. Rev. 30, 101-121.
93. Oh, C.J., Lee, D.O., Yang, H.S., Ha, T.J., Kim, M.J., 2003. Selective leaching of valuable metals from waste printed circuit boards. J. Air Waste Manag. Assoc. 53 (7), 897-902.
94. Pant, D., Joshi, D., Upreti, M.K., Kotnala, R.K., 2012. Chemical and biological extraction of metals present in E waste: a hybrid technology. Waste Manage. 32 (5), 979-990.
95. Park, Y.J., Faray, D.J., 2009. Recovery of high purity precious metals from printed circuit boards. J. Hazard. Mater. 164, 1152-1158.
96. Peng, M., Layiding, W., Dong, X., Jiangang, G., Guanghong, D., 2004. A physical process for recycling and reusing waste printed circuit boards. In: International Symposium on Electronics and Environment (ISEE), Washington, USA, pp. 237-242.
97. Petter, P.M.H., Veit, H.M., Bernardes, A.M., 2014. Evaluation of gold and silver leaching from printed circuit board of cellphones. Waste Manage. 34, 475-482.
98. Puckett, J., Byster, L., Westervelt, S., Gutierrez, R., Davis, S., Hussain, A., Dutta, M., 2002. Exporting Harm: The High-tech Trashing of Asia. Basel Action Network and Silicon Valley Toxics Coalition, pp. 1-51.
99. Quinet, P., Proost, J., Van Lierde, A., 2005. Recovery of precious metals from electronic scrap by hydrometallurgical processing routes. Miner. Metall. Process. 22 (1), 17-22.
100. Randol International Ltd., 1985. Water Management & Treatment for Mining & Metallurgical Operations. Golden, Colorado, pp. 2294-2700. Regulation of Controlling Waste Electric Electronic Equipments, 2012. .
101. Robinson, B.H., 2009. E-waste: an assessment of global production and environmental impacts. Sci. Total Environ. 408, 183-191.
102. Rocchetti, L., Vegliò, F., Kopacek, B., Beolchini, F., 2013. Environmental impact assessment of hydrometallurgical processes for metal recovery from WEEE residues using a portable prototype plant. Environ. Sci. Technol. 47 (3), 1581-1588.
103. Schwarzer, S., Bono, A.D., Peduzzi, P., Giuliani, G., Kluser, S., 2008. E-waste, the hidden side of IT equipment's manufacturing and use. Environmental Alert Bulletin UNEP. .
104. Senanayake, G., 2004. Gold leaching in non-cyanide lixiviant systems: critical issues on fundamentals and applications. Miner. Eng. 17, 785-801.
105. Senanayake, G., 2005. The role of ligands and oxidants in thiosulfate leaching of gold. Gold Bull. 38 (4), 170-179.
106. Senanayake, G., 2008. A Review of effects of silver, lead, sulfide and carbonaceous matter on gold cyanidation and mechanistic interpretation. Hydrometallurgy 90, 46-73.
107. Sepúlveda, A., Schluep, M., Renaud, F.G., 2010. A review of the environmental fate and effects of hazardous substances released from electrical and electronic equipments during recycling: examples from China and India. Environ. Impact Assess. Rev. 30 (1), 28-41.
108. Sheng, P.P., Etsell, T.H., 2007. Recovery of gold from computer circuit board scrap using aqua regia. Waste Manage. Res. 25, 380-383.
109. Shibata, J., Matsumoto, S., 1999. Development of environmentally friendly leaching and recovery process of gold and silver from wasted electronic parts. .
110. Shuey, S.A., Vildal, E.E., Taylor, P.R., 2006. Pyrometallurgical processing of electronic waste. Proc. SME Ann. Meet., 1-8
111. Sum, E.Y.L., 2005. Recovery of metals from electronic scrap. J. Miner. Met. Mater. Soc. 43, 53-61.
112. Tanriverdi, M., Mordogan, H., Ipekoglu, U., 2005. Leaching of Ovacik gold ore with cyanide, thiourea and thiosulfate. Miner. Eng. 18, 363-365.
113. Terazono, A., Murakami, S., Abe, N., Inanc, B., Moriguchi, Y., Sakai, S.-I., Kojima, M., Yoshida, A., Li, J., Yang, J., Wong, M.H., Jain, A., Kim, I.-S., Peralta, G.L., Lin, C.-C., 2006. Current status and research on e-waste issues in Asia. J. Mater. Cycles Waste Manage. 8, 1-12.
114. The Gold Institute, 2000. Uses of gold. Washington D.C.
115. Tripathi, A., Kumar, M., Sau, D.C., Agrawal, A., Chakravarty, S., Mankhand, T.R., 2012. Leaching of gold from the waste mobile phone printed circuit boards (PCBs) with ammonium thiosulphate. Int. J. Metall. Eng. 1 (2), 17-21.
116. Tue, N.M., Takahashi, S., Subramanian, A., Sakai, S., Tanabe, S., 2013. Environmental contamination and human exposure to dioxin-related compounds in e-waste recycling sites of developing countries. Environ. Sci.: Process. Impacts 15, 1326-1331.
117. Tuncuk, A., Stazi, V., Akcil, A., Yazici, E.Y., Deveci, H., 2012. Aqueous metal recovery techniques from e-scrap: hydrometallurgy in recycling. Miner. Eng. 25, 28-37.
118. UNEP, 2011. Recycling rates of metals-a status report. International resource panel. United Nations Environment Programme (UNEP), StEP (Solving the EWaste Problem).
119. USGS, 2001. Obsolete Computers, "Gold Mine" or High-Tech Trash?-Resource Recovery from Recycling. USGS (US Geological Survey), Fact Sheet, July.
120. Wan, R.Y., Le Vier, K.M., 2003. Solution chemistry factors for gold thiosulfate heap leaching. Int. J. Miner. Proc. 72, 311-322.
121. Wan, R.Y., Le Vier, K.M., Clayton, R.B., 1995. Hydrometallurgical Process for the Recovery of Precious Metal Values from Precious Metal Ores with Thiosulfate Lixiviant. International Patent WO 95/04164, pp. 1-10.
122. Wen, X., Zhao, Y., Duan, C., Zhou, X., Jiao, H., Song, S., 2005. Study on Metals recovery from discarded printed circuit boards by physical methods. In: International Symposium on Electronics and the Environment (ISEE), Washington, USA, pp. 121-128.
123. Wildmer, R., Oswald-Krapf, H., Sinha-Khetriwal, D., Schnellmann, M., Böni, H., 2005. Global perspectives on e-waste. Environ. Impact Assess. Rev. 25 (5), 436-458.
124. Xu, Q., Chen, D.H., Chen, L., Huang, M.H., 2009. Iodine leaching process for recovery of gold from waste PCB. Chin. J. Environ. Eng. 3 (5), 911-914.
125. Xu, Q., Chen, D.H., Chen, L., Huang, M.H., 2010. Gold leaching from waste printed circuit board by iodine process. Nonferrous Met. 62 (3), 88-90.
126. Yamane, L.H., Moraes, V.T., Espinosa, D.C.R., Tenorio, J.A.S., 2011. Recycling of WEEE: characterization of spent printed circuit boards from mobile phones and computers. Waste Manage. 31, 2553-2558.
127. Yang, T., Xu, Z., Wen, J., Yang, L., 2009. Factors influencing bioleaching copper from waste printed circuit boards by Acidithiobacillus ferrooxidans. Hydrometallurgy 97 (1-2), 29-32.
128. Yang, X., Sun, L., Xiang, J., Hu, S., Su, S., 2013. Pyrolysis and dehalogenation of plastics from waste electrical and electronic equipment (WEEE): a review. Waste Manage. 33, 462-473.
129. Yazici, E.Y., 2012. Recovery metals from electronic waste with physical and hydrometallurgical methods. Ph. D. Thesis, Karadeniz Technical University, Institute of Science, November, Trabzon.
130. Yazici, E.Y., Deveci, H., 2009. Recovery of metals from E-wastes. J. Chamber Mining Eng. Turkey 48 (3), 3-18.
131. Yazici, E.Y., Deveci, H., 2013. Extraction of metals from waste printed circuit boards (WPCBs) in H2SO4-CuSO4-NaCl solutions. Hydrometallurgy 139, 30-38.
132. Yazici, E.Y., Deveci, H., Alp, I., Akcil, A., Yazici, R., 2010. Characterisation of computer printed circuit boards for hazardous properties and beneficiation studies. In: Proceedings of XXVth Int. Mineral Processing Congress (IMPC), Brisbane, Australia, pp. 4009-4015.
133. Yazici, E.Y., Baş, A.D., Deveci, H., 2011. E-madenler. Madencilik Türkiye 19, 66-70.
134. Yu, J., Williams, E., Ju, M., 2009. Review and prospects of recycling methods for waste printed circuit boards. Sustainable systems and technology, ISSST '09. In: IEEE International Symposium, Phoenix, AZ, pp. 1-5.
135. Yu, N.T., Tie, Z.X., Wang, F.H., 2011. The methods for recycling of waste printed circuit boards. China Resour. Compr. Utilization 29, 21-24.
136. Zhang, S., Forssberg, E., 1997a. Electronic scrap characterization for materials recycling. J. Waste Manage. Resour. Recovery 3, 157-167.
137. Zhang, S., Forssberg, E., 1997b. Mechanical separation-oriented characterization of electronic scrap. Resour. Conserv. Recycl. 21, 247-269.
138. Zhang, S., Forssberg, E., 1998. Mechanical recycling of electronics scrap-the current status and prospects. Waste Manage. Res. 16 (2), 119-128.
139. Zhang, Z., Zhang, F.-S., 2014. Selective recovery of palladium from waste printed circuit boards by a novel non-acid process. J. Hazard. Mater. 279, 46-51.
140. Zhang, J., Lan, X.Z., Song, Y.H., Wang, B.X., Xing, X.D., 2009. Study on the extraction of gold with acidic thiourea. Precious Met. 2 (30), 75-82.
141. Zhang, Y., Liu, S., Xie, S., Zeng, X., Li, J., 2012. Current status on leaching precious metals from waste printed circuit boards. In: The 7th International Conference on Waste Management and Technology, Procedia Environmental Sciences, vol. 16, pp. 560-568.
142. Zhao, Y., Wen, X., Li, B., 2004. Recovery of copper from waste printed circuit board. J. Miner. Metall. Process. 21, 99-102.
143. Zhou, P., Zheng, Z., Tie, J., 2005. Technological process for extracting gold, silver and palladium from electronic industry waste. Chinese Patent, CN1603432A (C22B 11/00).
144. Zhou, X., Guo, J., Lin, K., Huang, K., Deng, J., 2013. Leaching characteristics of heavy metals and brominated flame retardants from waste printed circuit boards. J. Hazard. Mater. 246-247, 96-102.
145. 2 as oxidant. J. Hazard. Mater. 248-249, 177-184.