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Effect of cleaning by whirlpool washing machine on heavy metalcontent and external contamination in commercially grown edible redseaweed, Gracilaria fisheri |
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| รหัสดีโอไอ | |
| Creator | 1. Rapeeporn Ruangchuay 2. Chokchai Lueangthuwapranit 3. Suthon Kongrueang |
| Title | Effect of cleaning by whirlpool washing machine on heavy metalcontent and external contamination in commercially grown edible redseaweed, Gracilaria fisheri |
| Publisher | Research and Development Office,Prince of Songkla University |
| Publication Year | 2564 |
| Journal Title | Songklanakarin Journal of Science and Technology (SJST) |
| Journal Vol. | 43 |
| Journal No. | 3 |
| Page no. | 881-888 |
| Keyword | Gracilaria fisheri, edible seaweed, heavy metal, contamination, post-harvest |
| URL Website | https://rdo.psu.ac.th/sjstweb/ |
| ISSN | 0125-3395 |
| Abstract | The agarophytic seaweed, Gracilaria fisheri is used as food and also for agar extraction. This study investigated the useof a novel cleaning method to improve the quality of seaweed products. Dried seaweed was sampled from seaweed farms inPattani province, southern Thailand during the dry and wet seasons and from seaweed sold in souvenir shops in the area, todetermine the level of contamination and its quality and appearance before and after the cleaning process. A whirlpool washingmachine was used for cleaning. The concentrations of the heavy metals, Mn, Fe, Cr, Cd, Zn, Ni, Cu, and Pb were investigated inthe seaweed, and in the seawater and sediment in which it was grown. The sensory and external qualities were evaluated by 30testers. The results showed that the concentrations of heavy metals in the seaweed were similar to those in the seawater and thatmost of the external contamination in the seaweed during the dry and wet seasons, as well as in the purchased samples was frommollusks and epiphytes. Nine cycles of cleaning in the washing machine produced the lowest heavy metal concentrations andexternal contamination in the dried G. fisheri. The sensory evaluation showed that the color, smell, texture, and extent ofcontamination were superior in the seaweed subjected to nine washing cycles. The cleaning method adopted in this study for G.fisheri was able to effectively reduce both the heavy metal concentrations by scraping off the cell wall, and cleaning the seaweedusing a washing machine is therefore recommended prior to preparing the product for sale. |
