Selective adsorption and recycle of Cu^sup 2+^ from aqueous solution by modified sugarcane bagasse under dynamic condition

Tetraethylenepentamine modified sugarcane bagasse was prepared and applied to test its feasibility in removing and recovering Cu2+ from wastewater under dynamic condition. Results showed that the Cu2+ could be selectively absorbed from wastewater by the modified SCB fixed bed column. To understand t...

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Bibliographic Details
Published in:Environmental science and pollution research international 2017-04, Vol.24 (10), p.9202
Main Authors: Chen, Jia-dong, Yu, Jun-xia, Wang, Fen, Tang, Jia-qi, Zhang, Yue-fei, Xu, Yuan-lai, Chi, Ru-an
Format: Article
Language:English
Subjects:
Adsorption
Aqueous solutions
Bagasse
Binary system
Bioremediation
Cadmium
Copper
Environmental science
Experiments
Ions
Nitrates
Studies
Sugarcane
Water treatment
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Summary:Tetraethylenepentamine modified sugarcane bagasse was prepared and applied to test its feasibility in removing and recovering Cu2+ from wastewater under dynamic condition. Results showed that the Cu2+ could be selectively absorbed from wastewater by the modified SCB fixed bed column. To understand the adsorption mechanism, Cd2+ had been selected as the model interfering ion to investigate how co-ions influence the adsorption of Cu2+ on the sorbent. It was observed that the adsorption capacity of the sorbent for Cu2+ (0.26 mmol g-1) was significantly higher than that of Cd2+ (0.03 mmol g-1), even when the Cd2+ initial concentration was 100 times higher than that of Cu2+ in the binary system. This finding indicated that the presence of Cd2+ in the solution exerted negligible influence on the adsorption of Cu2+ on the modified SCB. The selectivity of the modified sorbent was further confirmed in the Cu/Cd/Mg/Pb/K quinary system. Further analysis to dynamic adsorption experiment illustrated that, due to the presence of amine groups, the modified SCB showed strong coordination ability to Cu2+, which allowed the other adsorbed ions (e.g., Cd2+) desorbed. This high adsorption selectivity toward Cu2+ suggested that this prepared sorbent would be a promising candidate for removing and recovering Cu2+ from wastewater.
ISSN:0944-1344
1614-7499
DOI:10.1007/s11356-017-8608-2