Innovative Ultrasound-Assisted Approaches towards Reduction of Heavy Metals and Iodine in Macroalgal Biomass
Publication details
Journal : Foods , vol. 10 , p. 1–13–12 , 2021
Publisher : MDPI
International Standard Numbers
:
Printed
:
2304-8158
Electronic
:
2304-8158
Publication type : Academic article
Issue : 3
Links
:
ARKIV
:
hdl.handle.net/11250/2774498
DOI
:
doi.org/10.3390/foods10030649
Research areas
Food from new sources
Food processing technologies
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Kjetil Aune
Chief Librarian
kjetil.aune@nofima.no
Summary
The aim of this work was to evaluate the potential of ultrasound (US), alone or in combination with mild heating and/or EDTA towards reduction of As, Cd, I, and Hg content of Laminaria hyperborea. Concentrations of As, Cd, I, and Hg of 56.29, 0.596, 7340, and <0.01 mg kg−1 of dry weight, respectively, were found in L. hyperborea blades. Treatment with US at 50 °C increased approx. 2-fold the amount of As released, although did not affect significantly the content of Cd or I, as compared to control (no US) samples. Reducing the temperature to 8 °C significantly decreased the effect of US, but heating at 80 °C did not cause a significant effect as compared to treatments at 50 °C. On the other hand, treatment with 0.1 N EDTA at 50 °C enhanced the percentage of Cd released by approximately 7-fold, regardless of sonication. In the present work, the combination of US and EDTA at 50 °C for 5 min led to a significant reduction of the As (32%), Cd (52%) and I (31%) content in L. hyperborea, thus improving the product’s safety for consumers.
