| Title | Innovative approach to dye adsorption: a comparative study of iron impregnated waste human hair-based activated carbon |
|---|---|
| ID_Doc | 25542 |
| Authors | Tee, YY; Tan, YY; Abidin, MIIZ; Raman, AAA; Buthiyappan, A |
| Title | Innovative approach to dye adsorption: a comparative study of iron impregnated waste human hair-based activated carbon |
| Year | 2024 |
| Published | |
| Abstract | Activated carbon in this work was derived from waste human hair via a two-step carbonization process. The activated carbon was further impregnated with metal by depositing iron oxide via a double decomposition method. The magnetic properties, surface morphology, point of zero charge, elemental composition, surface areas, and functional groups of the adsorbents were studied. Both adsorbents possess a variety of functional groups with iron oxide impregnated activated carbon exhibiting a coercivity of 17.8 G and a saturation magnetization of 13.0 emu/g, demonstrating its high resistance to demagnetization. Human hair-based activated carbon also exhibits a porous morphology, with a high BET surface area of 118.4 m2/g, which facilitates adsorption processes. Central composite design was used in the experimental design and optimization, considering dye concentration, adsorbent dosage, adsorption duration, and pH as four operational parameters. Iron oxide impregnated activated carbon was determined to exhibit a Langmuir adsorption capacity of 162.4 mg/g, which was higher than raw activated carbon itself (149.0 mg/g) under the same optimum conditions (60 min adsorption duration, 2 g/L adsorbent dosage, pH 9). Besides that, the regeneration ability of the adsorbents over 5 cycles showed that iron oxide impregnated activated carbon maintained a dye removal percentage ranging from 69 to 93%, which was significantly higher than raw activated carbon (6-39%). The outstanding adsorption performance and reusability of iron oxide impregnated activated carbon demonstrate the potential of waste human hair to be utilized as a sustainable and renewable resource for adsorbent development in wastewater treatment applications. |
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