Quaternary Adsorption Effect of Nickel (II), Antimony (III), Manganese (II) and Copper (II) onto Living Two Green Microalgae
Abstract
This
study aimed to investigate Ni, Sb, Mn and Cu adsorption from aqueous solution
by Chlorella and Scenedesmus algae. The competitive
adsorption efficiency
of nickel
(Ni2+),
antimony (Sb3+),
manganese (Mn2+)
and copper (Cu2+)
onto two living
microalgae
strains was studied from multi-metal aqueous solution for 24h incubation time.
After exposure, chlorophyll a-b, total carbohydrate and Atomic force microscopy (AFM) imaging were performed. Then
adsorption isotherms models of metal ions were determined based on Langmuir and
Freundlich isotherms. The adsorption capacity in multi-metal system was
determined 6.47 mgg-1 for antimony,
5.96 mgg-1 for manganese, 28.57 mgg-1 for copperand 10.71 mgg-1 for nickel (Cu>Ni>Sb>Mn)
by Chlorella respectively, whereas, and
10.82 mg g-1 for antimony, 7.07 mgg-1
for manganese, 27.09 mgg-1 for
copper and 9.71 mgg-1 for nickel(Cu>Sb>Ni>Mn)
by Scenedesmus cells. According to AFM images, deformation was detected in two algae cell walls
treated with heavy metals compared to untreated cells. For this study, Freundlich
adsorption model best fitted the data for all metal ions with 1/n value <1. As
a result, when the results obtained in the study are revealed that Chlorella and Scenedesmus cells
were an effective adsorbent for removal of the four heavy metals, especially Cu2+
ions from aqueous solutions due to its high efficiency of Cu adsorption.
Keywords
References
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