Activated carbon derived from silk sericin for efficient adsorption of methylene blue in aqueous solutions

IF 2.8 4区工程技术 Q2 POLYMER SCIENCE Macromolecular Research Pub Date : 2024-01-03 DOI:10.1007/s13233-023-00237-3

Shiwei Li, Mengyan Li, Xiaoning Zhang

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Abstract

The silk sericin (SS) recovered from silk degumming wastewater can be used to develop carbonaceous materials for organic dye removal from wastewater. To improve the adsorption capacity of the carbonaceous adsorbents derived from SS, KOH was used as an activation agent. The maximum adsorption capacity of SS-based activated carbon on methylene blue (MB) was determined by batch adsorption experiments as 964.63 mg/g. Mathematical models of adsorption were studied to reveal the adsorption mechanism. According to adsorption kinetics analysis, a pseudo-second-order model describes the adsorption performance of SS-based activated carbon on MB more appropriately, and the adsorption process follows the Langmuir model. The activated carbon prepared from SS in this work demonstrated improved MB adsorption capacity compared with other SS-based carbonaceous materials and therefore presented prosperous application possibilities for removing organic dyes from wastewater.

Graphical abstract

Creation and application of silk sericin-derived activated carbon. The silk sericin was first enriched from the silk degumming wastewater, then was converted into activated carbon by heating and activation. The generated activated carbon was later used for the adsorption of methylene blue from aqueous solutions through electrostatic and π-π interactions

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提取自蚕丝素的活性炭用于高效吸附水溶液中的亚甲基蓝

从丝绸脱胶废水中回收的丝胶蛋白（SS）可用于开发去除废水中有机染料的碳质材料。为了提高由 SS 制成的炭质吸附剂的吸附能力，使用了 KOH 作为活化剂。通过批量吸附实验，确定了 SS 基活性炭对亚甲基蓝（MB）的最大吸附容量为 964.63 mg/g。为揭示吸附机理，对吸附数学模型进行了研究。根据吸附动力学分析，伪二阶模型比较恰当地描述了 SS 基活性炭对 MB 的吸附性能，吸附过程遵循 Langmuir 模型。与其他以 SS 为基质的碳质材料相比，本研究以 SS 为基质制备的活性炭对甲基溴的吸附能力更强，为去除废水中的有机染料提供了广阔的应用前景。首先从丝绸脱胶废水中富集丝胶蛋白，然后通过加热和活化将其转化为活性炭。生成的活性炭通过静电和π-π相互作用吸附水溶液中的亚甲基蓝。

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来源期刊

Macromolecular Research 工程技术-高分子科学

CiteScore

4.70

自引率

8.30%

发文量

100

审稿时长

1.3 months

期刊介绍： Original research on all aspects of polymer science, engineering and technology, including nanotechnology Presents original research articles on all aspects of polymer science, engineering and technology Coverage extends to such topics as nanotechnology, biotechnology and information technology The English-language journal of the Polymer Society of Korea Macromolecular Research is a scientific journal published monthly by the Polymer Society of Korea. Macromolecular Research publishes original researches on all aspects of polymer science, engineering, and technology as well as new emerging technologies using polymeric materials including nanotechnology, biotechnology, and information technology in forms of Articles, Communications, Notes, Reviews, and Feature articles.