Adsorption of Methylene Blue Dye Using Guaran/TiO2 Hydrogel

Tommy Lee, Marcelina Samsuar, Maria Yuiana, Shella Permatasari Santoso

Abstract


Natural polysaccharide, namely guar gum (guaran), was utilized as the raw material for preparing hydrogel adsorbent, TiO2 was added into the hydrogel to enhance the adsorption capacity. In this work, methylene blue dye was chosen as the adsorbate model to evaluate the adsorption efficiency of the prepared guaran/TiO2 hydrogel. Several physicochemical characterizations were performed to elucidate the characteristic of the hydrogel, including scanning electron microscopy and Fourier transform infrared spectroscopy. The effect of temperature and pH on the adsorption efficiency of the guaran/TiO2 hydrogel toward methylene blue was evaluated. The result of the study reveals that the use of guaran/TiO2 hydrogel allow 69% removal of methylene blue from solution, and the maximum adsorption capacity was found to be 224 mg/g at system pH of 10 and temperature of 303K. The adsorption process was found to fit with the Langmuir model, indicating homogenous surface energy of the adsorption sites. The evaluation on the thermodynamic parameters of the adsorption indicates the spontaneous and exothermic behavior of the adsorption. This study demonstrated the potential of the guaran for preparing an environmentally friendly hydrogel, which can be a good choice of adsorbent for wastewater treatment.

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Keywords


guaran; guar gum; hydrogel; adsorption; methylene blue

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References


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DOI: https://doi.org/10.33508/wt.v22i2.5415