Carboxylic acid functionalized sesame straw: A sustainable cost-effective bioadsorbent with superior dye adsorption capacity

文献类型： 外文期刊

第一作者： Feng, Yanfang

作者： Feng, Yanfang;Xue, Lihong;Guo, Zhi;Zhang, Yingying;Yang, Linzhang;Feng, Yanfang;Yang, Linzhang;Liu, Yang;Sun, Haijun;Feng, Yanfang

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关键词： Cationic dyes;Carboxylic acid;Sesame straw;Thermo-decomposition;Bioadsorbents

期刊名称：BIORESOURCE TECHNOLOGY （ 影响因子：9.642； 五年影响因子：9.237 ）

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收录情况： SCI

摘要： This study prepared a carboxylic functionalized bioadsorbent that met the "4-E" criteria: Efficient, Economical, Environmentally friendly, and Easily-produced. Sesame straw (Sesamum indicum L.) was functionalized through treatment with citric acid (SSCA) and tartaric acid (SSTA). The products were examined for adsorption capacity and mechanisms. Langmuir model gave the best fit for the isotherm data, and the maximum monolayer adsorption capacity of SSCA was 650 mg g(-1) for methylene blue (MB). The excellent dye adsorption capacity of SSCA can be attributed to the introduction of ester groups during citric-acid modification and the tube-like structures (i.e., sesame straw cell wall remnants). At last, the cost of carboxylic acid functionalized bioadsorbents was evaluated, which showed that SSCA would be the most cost-effective bioadsorbent. Additionally, this study presents a thermo-decomposition methodology for contaminant-loaded bioadsorbent. Results showed that SSCA is probably one of the few bioadsorbents that can be produced and applied in industrial scale. (C) 2017 Elsevier Ltd. All rights reserved.

分类号： Q

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