Development of a seaweed-based fixed-bed sorption column for the removal of metals in a waste stream

TL;DRAbstract

Fucus vesiculosus, Polysiphonia lanosa, Ulva lactuca and a seaweed waste material resulting from the industrial processing of Ascophyllum nodosum were screened for Zn(II), Ni(II), Al(III) and Sb(III) removal in dried form, in both single and multi-metal systems. The Ascophyllum waste material, which is referred to as Waste Ascophyllum Product (WAP), was also screened in wet form. WAP was shown to be efficient at removing Zn(II), Ni(II) and Al(III) in both single and multi-metal systems. Removal efficiencies (RE) for dried WAP were 93, 96 and 68% for Zn(II), Ni(II) and Al(III) respectively in single metal systems. Polysiphonia lanosa was found to be more effective at removing Sb(III) than WAP with a RE of 86%. In multi-metal systems, Sb(III) was found to adversely affect the sorption of Zn(II), Ni(II) and Al(III) by WAP, while P. lanosa removed Sb(III) in multi-metal systems. The antagonistic effect of Sb(III) on the sorption of the other metals by WAP was investigated using FTIR, XPS a

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