POS3-0816
Synthesis of Hydrochar Supported Fe Aminoclay Composites via Hydrothermal Carbonization for Efficient Anionic Dye Adsorption
When and Where
Nov 30, -0001
12:00am - 12:00am
Presenter(s)
Minseong Jo (Chonnam National University)
Co-Author(s)
Abstract
To address global water scarcity through the removal of toxic dyes from industrial wastewater, a high efficiency carbon based composite adsorbent was synthesized by integrating biomass derived hydrochar with functional Fe aminoclay(FeAC) via a hydrothermal carbonization(HTC) process.
While aminoclays possess abundant surface amino groups, their high water solubility limits practical recovery and reuse; thus, hydrochar was employed as a supporting matrix to overcome these limitations and improve the low adsorption capacity inherent to raw hydrochar. FeAC was selected due to its high density of protonated amino groups, which facilitate optimal electrostatic interactions with anionic pollutants. Here, carboxymethyl cellulose (CMC) was used as the biomass precursor due to its strong interaction with FeAC, and FeCl3 was added to enhance the porosity of the hydrochar. The functional performance of the resulting FeAC@HY composites was evaluated through the adsorption of specific anionic dyes, namely Methyl Orange and Methyl Blue. Remarkably, the composite exhibited a pH independent adsorption capacity across a wide range from pH 2 to 10. The underlying adsorption kinetics were systematically determined, where the pseudo second order (PSO) model provided an excellent fit with a high coefficient of determination, where the R2 value was 0.9991. Furthermore, the equilibrium data were precisely described by the Sips isotherm model with an R2 value of 0.9971, yielding an outstanding maximum adsorption capacity of 808.4 mg/g. These findings clarify the precise adsorption mechanisms and demonstrate the strong potential of the composite for practical industrial wastewater treatment.
Keywords: Fe aminoclay, Hydrothermal carbonization, Wastewater treatment, Adsorption, Anionic dye removal
While aminoclays possess abundant surface amino groups, their high water solubility limits practical recovery and reuse; thus, hydrochar was employed as a supporting matrix to overcome these limitations and improve the low adsorption capacity inherent to raw hydrochar. FeAC was selected due to its high density of protonated amino groups, which facilitate optimal electrostatic interactions with anionic pollutants. Here, carboxymethyl cellulose (CMC) was used as the biomass precursor due to its strong interaction with FeAC, and FeCl3 was added to enhance the porosity of the hydrochar. The functional performance of the resulting FeAC@HY composites was evaluated through the adsorption of specific anionic dyes, namely Methyl Orange and Methyl Blue. Remarkably, the composite exhibited a pH independent adsorption capacity across a wide range from pH 2 to 10. The underlying adsorption kinetics were systematically determined, where the pseudo second order (PSO) model provided an excellent fit with a high coefficient of determination, where the R2 value was 0.9991. Furthermore, the equilibrium data were precisely described by the Sips isotherm model with an R2 value of 0.9971, yielding an outstanding maximum adsorption capacity of 808.4 mg/g. These findings clarify the precise adsorption mechanisms and demonstrate the strong potential of the composite for practical industrial wastewater treatment.
Keywords: Fe aminoclay, Hydrothermal carbonization, Wastewater treatment, Adsorption, Anionic dye removal
