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http://dx.doi.org/10.5657/KFAS.2016.0556

Removal of Hazardous Heavy Metals (Cd, Cr, and Pb) from Laver Pyropia sp. with Acid Treatment  

Mok, Jong Soo (Southeast Sea Fisheries Research Institute, National Institute of Fisheries Science)
Son, Kwang Tae (Food Safety Research Division, National Institute of Fisheries Science)
Lee, Tae Seek (Food Safety Research Division, National Institute of Fisheries Science)
Lee, Ka Jeong (Southeast Sea Fisheries Research Institute, National Institute of Fisheries Science)
Jung, Yeoun Joong (Southeast Sea Fisheries Research Institute, National Institute of Fisheries Science)
Kim, Ji Hoe (Food Safety Research Division, National Institute of Fisheries Science)
Publication Information
Korean Journal of Fisheries and Aquatic Sciences / v.49, no.5, 2016 , pp. 556-563 More about this Journal
Abstract
We examined the removal of hazardous heavy metals (Cd, Cr, and Pb) from laver Pyropia sp. using citric, hydrochloric, and nitric acids. Under the same conditions, the quality of the laver samples was also evaluated using the variation in absorbance and major mineral levels. The heavy metals that accumulated in raw laver samples after 3 days in seawater included Pb (117.79 μg/g), Cr (33.53 μg/g), and Cd (10.54 μg/g) in descending order. The rate of heavy metal removal from laver was higher at lower pH for all acids used. However, its color changed unsatisfactorily at pH 2.0. After 10 min in seawater at pH 2.5, the heavy metals in laver were eliminated in the order Cd (68.7–81.6%), Pb (57.7–67.0%), and Cr (31.9–49.4%) using the three acids. The differences in heavy metal removal among acid types were not significant. The laver quality was not affected after 20 min at the pH range of 2.5–4.0. The maximum removal of heavy metals was from laver soaked for 10 min in seawater at pH 2.5 using the organic acid, citric acid.
Keywords
Laver; Heavy metal; Citric acid; Quality; Organic acid;
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Times Cited By KSCI : 5  (Citation Analysis)
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