Sorption of lead (II) and strontium (II) ions from aqueous solutions onto non‑living Chlorella Vulgaris Alga/ Date pit activated carbon composite

서지정보

ㆍ발행기관 : 한국탄소학회 ㆍ수록지정보 : Carbon letters / 32권 / 2호
ㆍ저자명 : G. A. Dakroury, E. A. A. El‑Shazly, H. S. Hassan

목차

Abstract
1 Introduction
2 Experimental
2.1 Chemicals
2.2 Preparation of activated carbon
2.3 Preparation of non-living Chlorella Vulgaris algadate pit activated carbon composite (CVAC)
2.4 Instruments
2.5 Sorption studies
2.6 Determination of saturation capacity
2.7 Kinetics and isotherm modelling
3 Results
3.1 Materials characterization
3.2 Sorption study
3.3 Kinetic modeling
3.4 Adsorption isotherm modeling
3.5 Comparison with other adsorbents
4 Conclusions
Acknowledgements
References

영어 초록

Heavy metal pollution has a harmful impact on human health and is regarded as a vital problem. Preparation of a novel, low cost bio-sorbent for heavy metal sorption is the main target of this research. Non-living Chlorella Vulgaris Alga/Date pit activated carbon composite (1:1), (CV/AC), is a novel bio-sorbent prepared by the wet-chemical method for sorption of Pb (II) and Sr (II) from aqueous media. The optimum pH for sorption reaction is 5 and the equilibrium time is achieved within 1 h. The sorption efficiencies are 90.5% for Pb(II) and 95.7% for Sr(II) with initial concentration Co 10 mg L– 1 at 298 K. The monolayer sorption capacities of CV/AC composite at 298 K and pH = 5 were 6.34 ± 0.059, 5.97 ± 0.22 mg g– 1. The saturation capacities were 98.5 and 125 mg g– 1 for Pb (II) and Sr (II), respectively after 10 days. The sorption process is a spontaneous and endothermic reaction. It follows a pseudo-2nd-order mechanism. The results are suggestive of the need to adopt CV/AC composite as a potential bio-sorbent of Pb (II) and Sr (II) for waste water treatment.

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