期刊名称：Environmental Health Engineering and Management
印刷版ISSN：2423-3765
电子版ISSN：2423-4311
出版年度：2017
卷号：4
期号：1
页码：29-35
DOI：10.15171/EHEM.2017.05
语种：English
出版社：Kerman University of Medical Sciences
摘要：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..
