{"title":"Dopamine-modified silk fibroin powder for adsorption of heavy metal ions in water","authors":"Xiaoyu Han, Yunli Wang, Weilin Xu","doi":"10.1007/s10450-024-00510-6","DOIUrl":null,"url":null,"abstract":"<p>With increasing industrialization, the pollution of water resources by heavy metal ions has become an increasingly serious problem. In this study, dopamine-modified silk fibroin powder was used for the adsorption of heavy metal ions in water. A series of tests, including <i>L</i> value, visible light absorption, X-ray photoelectron spectroscopy, scanning electron microscopy, and particle size analysis, were performed on the modified silk fibroin powder. The results showed that the adsorption of heavy metal ions was most effective at pH = 6, and the adsorption effects of Cu<sup>2+</sup>, Cd<sup>2+</sup>, and Ni<sup>2+</sup> were 115.8, 60, and 60 mg/g, respectively. The adsorption of Cu<sup>2+</sup> by the modified silk fibroin powder conformed to Langmuir-type adsorption isotherm model and pseudo-second-order kinetic model. This study provides new insight for the application of natural silk fibroin powder for the adsorption of heavy metal ions in water.</p><h3 data-test=\"abstract-sub-heading\">Graphical abstract</h3>","PeriodicalId":458,"journal":{"name":"Adsorption","volume":null,"pages":null},"PeriodicalIF":3.0000,"publicationDate":"2024-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Adsorption","FirstCategoryId":"5","ListUrlMain":"https://doi.org/10.1007/s10450-024-00510-6","RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
引用次数: 0
Abstract
With increasing industrialization, the pollution of water resources by heavy metal ions has become an increasingly serious problem. In this study, dopamine-modified silk fibroin powder was used for the adsorption of heavy metal ions in water. A series of tests, including L value, visible light absorption, X-ray photoelectron spectroscopy, scanning electron microscopy, and particle size analysis, were performed on the modified silk fibroin powder. The results showed that the adsorption of heavy metal ions was most effective at pH = 6, and the adsorption effects of Cu2+, Cd2+, and Ni2+ were 115.8, 60, and 60 mg/g, respectively. The adsorption of Cu2+ by the modified silk fibroin powder conformed to Langmuir-type adsorption isotherm model and pseudo-second-order kinetic model. This study provides new insight for the application of natural silk fibroin powder for the adsorption of heavy metal ions in water.
期刊介绍：
The journal Adsorption provides authoritative information on adsorption and allied fields to scientists, engineers, and technologists throughout the world. The information takes the form of peer-reviewed articles, R&D notes, topical review papers, tutorial papers, book reviews, meeting announcements, and news.
Coverage includes fundamental and practical aspects of adsorption: mathematics, thermodynamics, chemistry, and physics, as well as processes, applications, models engineering, and equipment design.
Among the topics are Adsorbents: new materials, new synthesis techniques, characterization of structure and properties, and applications; Equilibria: novel theories or semi-empirical models, experimental data, and new measurement methods; Kinetics: new models, experimental data, and measurement methods. Processes: chemical, biochemical, environmental, and other applications, purification or bulk separation, fixed bed or moving bed systems, simulations, experiments, and design procedures.
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