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Dealginated seaweed waste for Zn(II) continuous removal from aqueous solution on fixed‐bed column
Author(s) -
Cardoso Saulo Luiz,
Costa Camila Stefanne Dias,
da Silva Meuris Gurgel Carlos,
Vieira Melissa Gurgel Adeodato
Publication year - 2018
Publication title -
journal of chemical technology and biotechnology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.64
H-Index - 117
eISSN - 1097-4660
pISSN - 0268-2575
DOI - 10.1002/jctb.5479
Subject(s) - aqueous solution , chemistry , desorption , zinc , residue (chemistry) , elution , sorbent , mass transfer , ion exchange , chromatography , adsorption , column chromatography , nuclear chemistry , ion , organic chemistry
BACKGROUND The alginate extraction residue from Brazilian Sargassum filipendula was employed as biosorbent for Zn(II) removal through a fixed‐bed column in order to explore its adsorptive properties and to establish a new use for this waste. RESULTS The best operating conditions were 0.5 mL min ‐1 and 1.0 mmol L ‐1 (inlet concentration), providing lower mass transfer zone and higher uptake. Elution percentages of 52 and 73% were obtained for the first and second desorption cycles, respectively, using CaCl 2 as eluent. The Yan et al. model was more representative of the experimental data. Characterization revealed that ion exchange is involved between zinc ions and light metals (Ca, Na, K and Mg). A decrease was observed in real and apparent densities of biomass, with an increase in particle porosity of the residue after process. CONCLUSION The study revealed that this biomass has potential for Zn removal from aqueous solution, encouraging its application as a biosorbent in future studies involving multicomponent systems. © 2017 Society of Chemical Industry