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[학술저널]

  • 학술저널

Comparative studies on use of iron impregnated granular activated carbon as an adsorbent and catalyst

Ankit Tyagi(Indian Institute of Technology Roorkee) Susmita Das(Indian Institute of Technology Roorkee) Vimal Chandra Srivastava(Indian Institute of Technology Roorkee)

UCI(KEPA) : I410-ECN-0101-2019-539-000448516

초록

In this study, iron (Fe) impregnated granular activated carbon (Fe-GAC) has been synthesized and characterized for various properties. Comparative studies have been performed for use of Fe-GAC as an adsorbent as well as a catalyst during catalytic oxidation of hydroquinone (HQ). In the batch adsorption study, effect of process parameter like initial HQ concentration (C₀ = 25-1,000 ㎎/L), pH (2-10), contact time (t: 0-24 h), temperature (T: 15-45℃) and adsorbent dose (w: 5-50 g/L) have been studied. Maximum HQ adsorption efficiency of 75% was obtained at optimum parametric condition of: pH = 4, w = 40 g/L and t = 14 h. Pseudo-second order model best-fitted the HQ adsorption kinetics whereas Langmuir model best-represented the isothermal equilibrium behavior. During oxidation studies, effect of various process parameters like initial HQ concentration (C₀: 20-100 ㎎/L), pH (4-8), oxidant dose (CH2O2: 0.4-1.6 mL/L) and catalyst dose (m: 0.5-1.5 g/L) have been optimized using Taguchi experimental design matrix. Maximum HQ removal efficiency of 83.56% was obtained at optimum condition of C₀ = 100 ㎎/L, pH = 6, CH2O2 = 0.4 mL/L, and m = 1 g/L. Overall use of Fe-GAC during catalytic oxidation seems to be a better as compared to its use an adsorbent for treatment of HQ bearing wastewater.

목차

ABSTRACT
1. Introduction
2. Materials and Methods
3. Results and Discussion
4. Conclusions
References

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