{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,9]],"date-time":"2026-10-09T10:05:00Z","timestamp":1791540300430,"version":"4.3.4"},"reference-count":65,"publisher":"MDPI AG","issue":"8","license":[{"start":{"date-parts":[[2018,8,20]],"date-time":"2018-08-20T00:00:00Z","timestamp":1534723200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"publisher","award":["51764051"],"award-info":[{"award-number":["51764051"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Molecules"],"abstract":"<jats:p>In this study, quaternary-ammonium-functionalized metal\u2013organic frameworks (MOFs) Et-N-Cu(BDC-NH2)(DMF), were prepared, characterized, and applied for the highly effective removal of metal cyanide complexes, including Pd(CN)42\u2212, Co(CN)63\u2212, and Fe(CN)63\u2212. Batch studies were carried out, and the maximum adsorption capacities of Pd(II), Co(III), and Fe(III) reached 172.9, 101.0, and 102.6, respectively. Adsorption was rapid, and equilibrium was established within 30 min. Et-N-Cu(BDC-NH2)(DMF) exhibited high thermal and chemical stability. Furthermore, absorbed Pd(CN)42\u2212 was selectively recovered by two-step elution. First, Co(CN)63\u2212 and Fe(CN)63\u2212 were eluted with a 1.5 mol L\u22121 KCl solution. Elution rates of Co(CN)63\u2212 and Fe(CN)63\u2212 were greater than 98.0%, whereas the elution percentage of Pd(CN)42\u2212 was less than 2.0%. Second, &gt;97.0% Pd(CN)42\u2212 on the loaded MOFs was eluted using a 2.0 mol L\u22121 KI solution. The recovery rate of Pd(CN)42\u2212 was greater than 91.0% after five testing cycles. Adsorption isotherms, kinetics models, and adsorption thermodynamics of Pd(CN)42\u2212 on Et-N-Cu(BDC-NH2) (DMF) were also systematically investigated. The Et-N-Cu(BDC-NH2) (DMF) absorbent exhibited a rapid, excellent ability for the adsorption of metal cyanide complexes.<\/jats:p>","DOI":"10.3390\/molecules23082086","type":"journal-article","created":{"date-parts":[[2018,8,20]],"date-time":"2018-08-20T11:23:06Z","timestamp":1534764186000},"page":"2086","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":31,"title":["Highly Effective Removal of Metal Cyanide Complexes and Recovery of Palladium Using Quaternary-Ammonium-Functionalized MOFs"],"prefix":"10.3390","volume":"23","author":[{"given":"Qin","family":"Zhang","sequence":"first","affiliation":[{"name":"School of Chemistry Science and Engineering, Yunnan University, Cuihu North Road No. 2, Kunming 650091, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Muhan","family":"Chen","sequence":"additional","affiliation":[{"name":"School of Chemistry Science and Engineering, Yunnan University, Cuihu North Road No. 2, Kunming 650091, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Lijiang","family":"Zhong","sequence":"additional","affiliation":[{"name":"School of Chemistry Science and Engineering, Yunnan University, Cuihu North Road No. 2, Kunming 650091, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Qun","family":"Ye","sequence":"additional","affiliation":[{"name":"School of Chemistry Science and Engineering, Yunnan University, Cuihu North Road No. 2, Kunming 650091, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Shaoshong","family":"Jiang","sequence":"additional","affiliation":[{"name":"School of Chemistry Science and Engineering, Yunnan University, Cuihu North Road No. 2, Kunming 650091, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7873-5582","authenticated-orcid":false,"given":"Zhangjie","family":"Huang","sequence":"additional","affiliation":[{"name":"School of Chemistry Science and Engineering, Yunnan University, Cuihu North Road No. 2, Kunming 650091, China"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2018,8,20]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"183","DOI":"10.1016\/S0956-053X(02)00064-8","article-title":"Destruction of cyanide waste solutions using chlorine dioxide, ozone and titania sol","volume":"23","author":"Parga","year":"2003","journal-title":"Waste Manag."},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"1699","DOI":"10.1002\/jctb.5168","article-title":"Separation and recovery of Pd(II) and Pt(II) from cyanide liquors of Pd-Pt flotation concentrate via solvent extraction","volume":"92","author":"Chen","year":"2017","journal-title":"J. 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