| Autor: |
Hashem, Md. Abul, Mim, S., Payel, S., Shaikh, Md. Zillur Rahaman, Nur-A-Tomal, Md. Shahruk |
| Předmět: |
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| Zdroj: |
International Journal of Environmental Science & Technology (IJEST); Nov2023, Vol. 20 Issue 11, p12363-12378, 16p |
| Abstrakt: |
In this study, activated adsorbents derived from Ficus carica that concluded thermal and chemical-thermal activation for chromium (Cr) adsorption from tannery wastewater are described. The performance of thermal, chemicals (potassium hydroxide and zinc chloride) impregnated thermal adsorbents has been assessed. The adsorbent was characterized in terms of Scanning Electron Microscopy, Energy-Dispersive X-ray Spectrometry, Fourier Transform Infrared spectroscopy, Brunauer–Emmett–Teller surface area and pH point of zero charge analysis. Batch adsorption capacity was optimized investigating adsorbent dose, and reaction time. pH and pHpzc values of the adsorbent revealed the reaction mechanism during adsorption. The interaction of adsorbent-adsorbate was analyzed by kinetics and Langmuir, Freundlich, and Dubinin–Radushkevich isotherm models. Derived thermal-activated Ficus carica adsorbent showed the best Cr adsorption capacity (184.70 mg/g). At identical conditions, Cr adsorption capacity on thermally and chemical (potassium hydroxide and zinc chloride)-thermally activated Ficus carica adsorbent was 99.98%, 98.8%, and 8.9%, respectively. The best fitting was observed with the higher regression coefficient (R2 = 0.9996) value for the PSO kinetics. Among isotherm models, the strong interaction between the adsorbent and adsorbate (Cr) was well described by the Langmuir model. This investigation does support the development of an environmentally friendly process for the adsorption of chromium from tannery wastewater in a short time. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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