Removal of Congo red dye from aqueous solutions by a low-cost adsorbent: activated carbon prepared from Aloe vera leaves shell
Background: Synthetic dyes have several harmful effects on human health as well as aquatic life. In this study, activated carbon (AV-AC), based on Aloe vera leaf shells, was used as a novel agricultural adsorbent, one that is low-cost and available for the removal of Congo red (CR) as a carcinogen...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Kerman University of Medical Sciences
2017-03-01
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| Series: | Environmental Health Engineering and Management |
| Subjects: | |
| Online Access: | http://ehemj.com/article-1-240-en.html |
| Summary: | Background: Synthetic dyes have several harmful effects on human health as well as aquatic life. In this
study, activated carbon (AV-AC), based on Aloe vera leaf shells, was used as a novel agricultural adsorbent,
one that is low-cost and available for the removal of Congo red (CR) as a carcinogenic dye from aqueous
solutions.
Methods: In the batch system, the influence of different parameters like contact time, pH, adsorbent
dosage, and initial CR concentration were examined on the dye removal from liquid medium. The
experimental data were fitted by pseudo-first-order and pseudo-second-order kinetics, and also Langmuir
and Freundlich isotherms models.
Results: The optimum contact time and pH for the uptake of CR were obtained at 20 minutes and acidic
pH of 2. The maximum uptake capacity of CR dye by AV-AC was 1850 mg/g. The results showed that the
experimental data were well-fitted by the pseudo-second-order kinetic model (R2 > 0.99) and Freundlich
isotherm model (R2 > 0.99).
Conclusion: According to the results of our study, the AV-AC is a low-cost, non-toxic, and effective
adsorbent for the uptake of CR dye from aqueous media. |
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| ISSN: | 2423-3765 2423-4311 |