Using Natural Biomacromolecules for Adsorptive and Enzymatic Removal of Aniline Blue from Water

Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry
Xiaojuan YouSonghua Li

Abstract

The present study investigated the adsorptive and enzymatic removal of aniline blue dye (AB) from aqueous solution using waxy riceprocessing waste (RW), peanut shell (PS), microbial waste of Aspergillus niger (MW) as low cost adsorbents, and laccase (Lac) as a biocatalyst. Commercial activated carbon (AC) was also employed to compare the adsorption performance with the three adsorbents. Dye removal was examined under various parameters in batch experiments. It was found that dye removal by RW and Lac was 89⁻94% noticeably better than that by MW and PS (20⁻70%). In any cases, AC produced the highest dye removal among the tested materials. The kinetics, isotherms, and thermodynamics were then analyzed to elucidate the adsorption process by the four adsorbents. The pseudo-second order kinetic was superior to the pseudo first order kinetic model in describing adsorption for all adsorbents. The Langmuir model fitted the adsorption process very well, indicating monolayer coverage of dyes on a solid surface. A thermodynamic analysis of enthalpy (ΔH°), entropy (ΔS°), and Gibbs free energy (ΔG°) classified the adsorption as a nonspontaneous and endothermic process. The results reveal diverse natural materials (e.g., processing waste RW)...Continue Reading

References

Dec 2, 2009·Bioresource Technology·Josée-Anne MajeauRajeshwar Dayal Tyagi
Apr 30, 2010·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Yati YangJuanmin Wan
Jun 5, 2012·Journal of Environmental Management·Dalel DaâssiTahar Mechichi
Oct 21, 2017·Bioresource Technology·Jiayang LiuQingguo Huang

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Citations

Jun 7, 2020·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Wenjie SuiChao Li
Aug 15, 2018·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Shoujuan WangQingxi Hou

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Datasets Mentioned

BETA
JX861099

Methods Mentioned

BETA
enzymatic treatment

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