O2-enriched microbial activity with pH-sensitive solvo-chemical and electro-chlorination strategy to reclaim critical metals from the hazardous waste printed circuit boards
DC Field | Value | Language |
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dc.contributor.author | Ilyas, Sadia | - |
dc.contributor.author | Srivastava, Rajiv Ranjan | - |
dc.contributor.author | Kim, Hyunjung | - |
dc.date.accessioned | 2023-09-04T07:13:44Z | - |
dc.date.available | 2023-09-04T07:13:44Z | - |
dc.date.created | 2023-07-21 | - |
dc.date.issued | 2021-08 | - |
dc.identifier.issn | 0304-3894 | - |
dc.identifier.uri | https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/189693 | - |
dc.description.abstract | An innovative process integration for the sustainable recovery of critical metals from waste printed circuit boards (WPCBs) is demonstrated. In the acid pre-treatment of WPCBs, > 95% of highly toxic metals lead and tin could dissolve after 240 min of contact in 4.0 mol L-1 HNO3. Thereafter, the microbial activity of Sulfobacillus ther-mosulfidooxidans (strain RDB) under intense aeration is found favorable for base metals' liberation. similar to 92% copper, 89% nickel, and 93% zinc get extracted at the optimal condition of O-2-mixed-aeration, 30%; pulp density, 10 g L-1; aeration rate, 0.5 L min(-1); sulfur dosage, 2%; temperature, 45 degrees C; and duration, 21 days. Quantitative separation of base metals is achieved using ketoxime as a function of equilibrium pH that yielding pH(0.5) order: Cu (1.45) < Ni (5.7) < Zn (8.1). The residual gold from WPCBs is uniquely leached (similar to 99% efficiency) in brine solution (2.0 mol L-1 NaCl) under the electro-chlorination rate, 0.62 mmol min(-1); dissolution pH, 1.0; pulp density, 20 g L-1; temperature, 30 degrees C; and time, 60 min. Subsequently, gold from brine solution is solvated with tri-butyl-phosphate at pH(eq), <= 0.5, forming <([2( RP = O)center dot HAuCl4 center dot H2O])over bar> complex in the organic phase. Finally, > 99% of high-purity gold is stripped from loaded organic while contacting ammoniacal thiosulfate solution in two-stages of counter-current flow. | - |
dc.language | 영어 | - |
dc.language.iso | en | - |
dc.publisher | ELSEVIER | - |
dc.title | O2-enriched microbial activity with pH-sensitive solvo-chemical and electro-chlorination strategy to reclaim critical metals from the hazardous waste printed circuit boards | - |
dc.type | Article | - |
dc.contributor.affiliatedAuthor | Kim, Hyunjung | - |
dc.identifier.doi | 10.1016/j.jhazmat.2021.125769 | - |
dc.identifier.scopusid | 2-s2.0-85103945733 | - |
dc.identifier.wosid | 000664767600006 | - |
dc.identifier.bibliographicCitation | JOURNAL OF HAZARDOUS MATERIALS, v.416 | - |
dc.relation.isPartOf | JOURNAL OF HAZARDOUS MATERIALS | - |
dc.citation.title | JOURNAL OF HAZARDOUS MATERIALS | - |
dc.citation.volume | 416 | - |
dc.type.rims | ART | - |
dc.type.docType | 정기학술지(Article(Perspective Article포함)) | - |
dc.description.journalClass | 1 | - |
dc.description.isOpenAccess | N | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.relation.journalResearchArea | Engineering Environmental Sciences & Ecology | - |
dc.relation.journalWebOfScienceCategory | Engineering, Environmental Environmental Sciences | - |
dc.subject.keywordPlus | RECOVERY | - |
dc.subject.keywordPlus | SCRAP | - |
dc.subject.keywordPlus | COPPER | - |
dc.subject.keywordPlus | EXTRACTION | - |
dc.subject.keywordAuthor | Hybrid technology | - |
dc.subject.keywordAuthor | Green recycling process | - |
dc.subject.keywordAuthor | Electronic waste | - |
dc.subject.keywordAuthor | Bio-solvo-and electro-chemical approach | - |
dc.subject.keywordAuthor | Strategically-critical metals | - |
dc.identifier.url | https://www.sciencedirect.com/science/article/pii/S0304389421007330?via%3Dihub | - |
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