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首页> 外文期刊>International Journal of Biological Macromolecules: Structure, Function and Interactions >Super and selective adsorption of cationic dyes using carboxylate-modified lignosulfonate by environmentally friendly solvent-free esterification
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Super and selective adsorption of cationic dyes using carboxylate-modified lignosulfonate by environmentally friendly solvent-free esterification

机译：通过通过环保型溶剂酯化使用羧酸盐改性的木质素磺酸盐的超级和选择性吸附阳离子染料

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摘要

Herein, following the strategy of sustainable, environment protection, circular economy development, carboxylate-modification lignosulfonate polymer (M-LSP) was synthesized from lignosulfonate by solvent-free esterifying with maleic anhydride (MA) by one step, and was used to remove the dyes by adsorption. FT-IR and XPS were used to confirm successful preparation of M-LSP. The result is that: M-LSP is apt W adsorb cationic dye. In single system, the super adsorption performance of M-LSP for methylene blue (MB) is depended on the carboxyl content in M-LSP. M-LSP performs its remarkable adsorption performance for MB stably at pH 7.0 similar to 10.0, and the maximum adsorption capacity of M-LSP for MB is up to 613.5 mg/g according to Langmuir isotherm model. The Langmuir isotherm and pseudo-second-order kinetic models are more suitable to desoipt adsorption process of M-LSP for MB. In binary and ternary system, the M-LSP adsorbs the cationic dyes simultaneously, but selectively adsorbs MB. M-LSP can effectively remove cationic dyes in simulate dyestuff water. Moreover, the removal percentage of regenerated M-LSP decreases only 8.4% after 4 desorption-resorption cycles. The results indicated that M-LSP could be a candidate for remediation of real printing and dyeing or textile wastewater containing cationic dyes. (C) 2020 Published by Elsevier B.V.
机译：在此，在可持续，环境保护，循环经济发展的策略之后，通过用马来酸酐（MA）通过一种步骤从木质素磺酸盐合成羧酸盐改性木质素磺酸盐聚合物（M-LSP），并用途去除溶剂通过吸附染料。 FT-IR和XPS用于确认成功的M-LSP制备。结果是：M-LSP是APT W吸附阳离子染料。在单一系统中，亚甲基蓝（MB）的M-LSP的超吸附性能依赖于M-LSP中的羧基含量。 M-LSP在类似于10.0的pH 7.0下稳定地对MB进行了显着的吸附性能，MB的M-LSP的最大吸附容量可达613.5 mg / g，根据Langmuir等温线模型高达613.5 mg / g。 Langmuir等温线和伪二阶动力学模型更适合于MB的M-LSP的Desopit吸附过程。在二进制和三元系统中，M-LSP同时吸附阳离子染料，但选择性地吸附MB。 M-LSP可以有效地去除模拟染料水中的阳离子染料。此外，在解吸吸收循环后再生M-LSP的去除率仅降低了8.4％。结果表明，M-LSP可以是修复含阳离子染料的真正印刷和纺织废水的候选物。 （c）2020由elsevier b.v发布。

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