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The as-prepared high-purity nano-CuO (99.04 wt%) with impurity levels &lt;0.12 wt% and Cl\n                    <jats:sup>\u2212<\/jats:sup>\n                    &lt;0.0015 wt%.\n                  <\/jats:p>","DOI":"10.1039\/d5ra05321h","type":"journal-article","created":{"date-parts":[[2025,12,11]],"date-time":"2025-12-11T15:21:48Z","timestamp":1765466508000},"page":"49488-49500","update-policy":"https:\/\/doi.org\/10.1039\/rsc_crossmark_policy","source":"Crossref","is-referenced-by-count":4,"title":["Sustainable treatment and resource recovery from PCB acidic etching waste solution: Co-production technology of basic copper carbonate and copper oxide and transformation mechanisms"],"prefix":"10.1039","volume":"15","author":[{"given":"Song","family":"Ren","sequence":"first","affiliation":[{"name":"School of Chemistry and Material Engineering, Mianyang Teachers' College, Mianxing West Road No.166, Mianyang City, Sichuan Province, 621000, CN"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Dengliang","family":"He","sequence":"additional","affiliation":[{"name":"School of Chemistry and Material Engineering, Mianyang Teachers' College, Mianxing West Road No.166, Mianyang City, Sichuan Province, 621000, CN"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3072-191X","authenticated-orcid":false,"given":"Shishan","family":"Xue","sequence":"additional","affiliation":[{"name":"School of Chemistry and Material Engineering, Mianyang Teachers' College, Mianxing West Road No.166, Mianyang City, Sichuan Province, 621000, CN"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4719-6752","authenticated-orcid":false,"given":"Shuxin","family":"Liu","sequence":"additional","affiliation":[{"name":"School of Chemistry and Material Engineering, Mianyang Teachers' College, Mianxing West Road No.166, Mianyang City, Sichuan Province, 621000, CN"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Wei","family":"Zhang","sequence":"additional","affiliation":[{"name":"Key Laboratory of Solid Waste Treatment and Resource Recycle, Ministry of Education, Mianyang City, Sichuan Province, 621000, CN"},{"name":"Analytical and Testing Center, Southwest University of Science and Technology, Mianyang, 621000, CN"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"292","published-online":{"date-parts":[[2025]]},"reference":[{"key":"D5RA05321H\/cit1\/1","doi-asserted-by":"crossref","first-page":"43","DOI":"10.1007\/s41061-017-0118-7","volume":"375","author":"Ning","year":"2017","journal-title":"Top. 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