Characterization and Decolorization of Modified Guar Gum/Biochar Hydrogel Composite

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Abstract:

Industrial wastewater often contains colored toxic dyes and heavy metals that harm ecosystems and human health, highlighting the need for sustainable treatment strategies. This study aimed to develop a guar gum (GG)/polyacrylamide (PAAm)/rice straw biochar (RSBC) hydrogel grafted onto polyethylene terephthalate (PET) (GG/PAAm RSBC-g-PET) textile, and its structure was characterized through swelling behavior, FTIR-ATR spectroscopy, and Scanning Electron Microscopy (SEM) analysis. The modified GG/PAAm/RSBC-g-PET exhibits a significant increase in water absorption compared to GG/PAAm-g-PET. The alteration and shifted peaks were observed particularly at bands of 3441 cm-1 (RSBC), and 852 cm-1 (galactose and mannose units), imparting effective crosslinking. SEM analysis revealed a porous structure with irregular magnetite particles, enhancing the active surface area. The performance of the GG/PAAm/RSBC-g-PET composite was evaluated using industrial wastewater, which resulted in reduced turbidity (26.5 NTU) and color (~49.5 ADMI), compared to filtration with PET textile alone (47 NTU and ~69.5 ADMI). The GG/PAAm/RSBC-g-PET composite exhibits comparable yet inconsistent improvements, possibly due to particle release and pore blockage. These findings demonstrate the feasibility of the GG/PAAm/RSBC-g-PET textile for decolorization, indicating its potential application in wastewater remediation.

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Solid State Phenomena (Volume 392)

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85-90

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April 2026

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© 2026 Trans Tech Publications Ltd. All Rights Reserved

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