{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,29]],"date-time":"2026-10-29T08:37:03Z","timestamp":1793263023534,"version":"4.5.0"},"reference-count":7,"publisher":"SAGE Publications","issue":"4","license":[{"start":{"date-parts":[[2007,8,1]],"date-time":"2007-08-01T00:00:00Z","timestamp":1185926400000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/journals.sagepub.com\/page\/policies\/text-and-data-mining-license"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Waste Manag Res"],"published-print":{"date-parts":[[2007,8]]},"abstract":"<jats:p>Computer circuit board scrap was first treated with one part concentrated nitric acid and two parts water at 70\u00b0C for 1 h. This step dissolved the base metals, thereby liberating the chips from the boards. After solid\u2014liquid separation, the chips, intermixed with some metallic flakes and tin oxide precipitate, were mechanically crushed to liberate the base and precious metals contained within the protective plastic or ceramic chip cases. The base metals in this crushed product were dissolved by leaching again with the same type of nitric acid\u2014water solution. The remaining solid constituents, crushed chips and resin, plus solid particles of gold, were leached with aqua regia at various times and temperatures. Gold was precipitated from the leachate with ferrous sulphate.<\/jats:p>","DOI":"10.1177\/0734242x07076946","type":"journal-article","created":{"date-parts":[[2007,8,14]],"date-time":"2007-08-14T04:27:49Z","timestamp":1187065669000},"page":"380-383","source":"Crossref","is-referenced-by-count":205,"title":["Recovery of gold from computer circuit board scrap using aqua regia"],"prefix":"10.1177","volume":"25","author":[{"given":"Peter P.","family":"Sheng","sequence":"first","affiliation":[{"name":"Department of Chemical and Materials Engineering, University of Alberta, Edmonton, Alberta, Canada"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Thomas H.","family":"Etsell","sequence":"additional","affiliation":[{"name":"Department of Chemical and Materials Engineering, University of Alberta, Edmonton, Alberta, Canada,"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"179","published-online":{"date-parts":[[2007,8,1]]},"reference":[{"key":"atypb1","doi-asserted-by":"publisher","DOI":"10.1007\/978-1-4757-6381-2"},{"key":"atypb2","doi-asserted-by":"publisher","DOI":"10.1049\/cp:19951182"},{"key":"atypb3","first-page":"561","volume":"13","author":"Herschlag, V.E.","year":"1941","journal-title":"Industrial and Engineering Chemistry"},{"key":"atypb4","volume-title":"Encyclopedia of Chemical Reactions","author":"Jacobson, C.A.","year":"1959"},{"key":"atypb5","unstructured":"Setchfield, J.H. (1987) Electronic scrap treatment at Engelhard. In: Vermeylen, G. & Verbeeck, R. (eds.) Precious Metals 1987, pp. 147\u2014164. Pergamon Press, Toronto, Canada."},{"key":"atypb6","volume-title":"Corrosion Handbook","author":"Uhlig, H.H.","year":"1948"},{"key":"atypb7","doi-asserted-by":"publisher","DOI":"10.1177\/0734242X9801600204"}],"container-title":["Waste Management &amp; Research: The Journal for a Sustainable Circular Economy"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/journals.sagepub.com\/doi\/pdf\/10.1177\/0734242X07076946","content-type":"application\/pdf","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/journals.sagepub.com\/doi\/pdf\/10.1177\/0734242X07076946","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2026,5,1]],"date-time":"2026-05-01T20:22:49Z","timestamp":1777666969000},"score":1,"resource":{"primary":{"URL":"https:\/\/journals.sagepub.com\/doi\/10.1177\/0734242X07076946"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2007,8]]},"references-count":7,"journal-issue":{"issue":"4","published-print":{"date-parts":[[2007,8]]}},"alternative-id":["10.1177\/0734242X07076946"],"URL":"https:\/\/doi.org\/10.1177\/0734242x07076946","relation":{},"ISSN":["0734-242X","1096-3669"],"issn-type":[{"value":"0734-242X","type":"print"},{"value":"1096-3669","type":"electronic"}],"subject":[],"published":{"date-parts":[[2007,8]]}}}