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Fabrication of quaternized sisal fiber by electron beam radiation and its adsorption of indigo carmine from aqueous solution

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Abstract

The removal of Indigo carmine (IC) from the aquatic environment is necessary due to its high toxicity. In this study, methacryloxy ethyltrimethyl ammonium chloride (DMC) modified sisal fiber (SF-DMC) was prepared by a one-step process using radiation induced grafting polymerization. The adsorption performance of SF-DMC toward IC dye was investigated by batch adsorption experiments. The adsorption kinetic studies show that adsorption equilibrium was reached within 30 min, and it can be well described by pseudo-second-order model. The adsorption isotherms are well described by Langmuir model, and the theoretical maximum adsorption capacities are 709.22–892.86 mg/g at different temperatures. The adsorption of IC onto SF-DMC is a spontaneous and exothermic reaction and low temperatures is favorable for adsorption. Besides, SF-DMC has good selective adsorption for IC in the mixed anionic dyes and in high-salt solution. The dyes on SF-DMC can be desorbed by 2 mol/L HCl solution. Therefore, the SF-DMC exhibits excellent adsorption performance, which is suitable for IC removal from high-salt wastewater.

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Acknowledgments

This work was supported by National Natural Science Foundation of China (11875138, 11905070); Natural Science Foundation of Hubei Province, China (2020CFB852).

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Correspondence to Long Zhao.

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Du, J., Fan, D., Dong, Z. et al. Fabrication of quaternized sisal fiber by electron beam radiation and its adsorption of indigo carmine from aqueous solution. Cellulose 29, 5137–5149 (2022). https://doi.org/10.1007/s10570-022-04568-9

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  • DOI: https://doi.org/10.1007/s10570-022-04568-9

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