Highly efficient removal of toxic ions by the activated carbon derived from Citrus limon tree leaves

서지정보

ㆍ발행기관 : 한국탄소학회 ㆍ수록지정보 : Carbon letters
ㆍ저자명 : Fahime Nemati, Dariush Jafari, Hossein Esmaeili

목차

Abstract
1 Introduction
2 Materials and methods
2.1 Chemicals
2.2 Preparation of stock solution
2.3 Preparation of adsorbent
2.4 Experimental procedure
3 Results and discussion
3.1 Adsorbent characterizations
3.2 Effect of solution pH
3.3 Effect of adsorbent dosage
3.4 Effect of ions initial concentration
3.5 Effects of contact time and temperature
3.6 Desorption and regeneration experiments
3.7 Adsorption isotherms
3.8 Kinetic study
3.9 Thermodynamic study
4 Conclusion
References

영어 초록

The purpose of this study was to remove lead and arsenic ions from aqueous solutions using the activated carbon prepared from Citrus limon tree leaves. Characteristics of the prepared adsorbent were studied thoroughly using BET, SEM, EDS and mapping, XRD, and RAMAN analyses. The results of experiments showed that the highest adsorption efficiencies were 97.67% and 95.89% for Pb (II) and As (III), respectively. Additionally, the adsorbent was successfully regenerated four times and therefore it was able to perform the adsorption and desorption processes well. Moreover, the results of adsorption kinetics showed that the pseudo second-order kinetic model was more effective for the description of adsorption mechanism of both metals. Furthermore, the equilibrium studies indicated that Langmuir and Freundlich isotherm models were desirable for lead and arsenic ions, respectively.

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