{"title":"Gold recovery from acidic wastewater using ionic viologen organic and metal–organic framework composites†","authors":"Sk Abdul Wahed, Atikur Hassan and Neeladri Das","doi":"10.1039/D5MA00306G","DOIUrl":null,"url":null,"abstract":"<p >This study reports syntheses of a set of unique ionic hybrid composites to efficiently remove gold anions from acidic wastewater. The hybrid composites were easily obtained using a well-known metal–organic framework (MOF) and an ionic viologen organic framework (iVOF) that were thoroughly characterized. The highest uptake capacity recorded by iVOF-2@MOF_Comp-3 was 1053 mg g<small><sup>−1</sup></small> within three hours. This adsorbent was also able to quantitatively (>99%) remove gold species within fifteen minutes from a highly acidic (pH = 1) aqueous solution with a distribution coefficient (<em>K</em><small><sub>d</sub></small>) greater than 10<small><sup>5</sup></small> mL g<small><sup>−1</sup></small>. The hybrid composite adsorbent could also be recycled easily, thus fulfilling most of the criteria expected in effective adsorbents.</p>","PeriodicalId":18242,"journal":{"name":"Materials Advances","volume":" 13","pages":" 4513-4521"},"PeriodicalIF":4.7000,"publicationDate":"2025-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2025/ma/d5ma00306g?page=search","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Materials Advances","FirstCategoryId":"1085","ListUrlMain":"https://pubs.rsc.org/en/content/articlelanding/2025/ma/d5ma00306g","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
Abstract
This study reports syntheses of a set of unique ionic hybrid composites to efficiently remove gold anions from acidic wastewater. The hybrid composites were easily obtained using a well-known metal–organic framework (MOF) and an ionic viologen organic framework (iVOF) that were thoroughly characterized. The highest uptake capacity recorded by iVOF-2@MOF_Comp-3 was 1053 mg g−1 within three hours. This adsorbent was also able to quantitatively (>99%) remove gold species within fifteen minutes from a highly acidic (pH = 1) aqueous solution with a distribution coefficient (Kd) greater than 105 mL g−1. The hybrid composite adsorbent could also be recycled easily, thus fulfilling most of the criteria expected in effective adsorbents.
本研究报道了一套独特的离子杂化复合材料的合成，以有效地去除酸性废水中的金阴离子。采用已知的金属有机骨架（MOF）和离子紫离子有机骨架（iVOF）制备了杂化复合材料，并对其进行了充分的表征。iVOF-2@MOF_Comp-3在3小时内记录的最高摄取量为1053 mg g - 1。该吸附剂还能够在15分钟内定量地（>99%）从高酸性（pH = 1）水溶液中去除金，其分布系数（Kd）大于105 mL g−1。混合复合吸附剂也易于回收，因此满足了有效吸附剂的大部分标准。
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