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KMID : 0380619940260060740
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Korean Journal of Food Science and Technology
1994 Volume.26 No. 6 p.740 ~ p.744
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Effect of Green Tea Beverage on the Removal of Cadmium and Lead by Membrane Filtration
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Abstract
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This study was undertaken to prove the suppressing effect of green tea on the intestinal absorption of heavy metals using in vitro membrane filtration system. From drinking water contaminated with 10 and 100 times level of water quality standard for heavy metals, the removal ratio of lead (Pb) was 50∼70% by green and black teas, and 30∼40% by roasted barley tea. The removal ratio of cadmium (Cd) was 30∼40% by green tea and black teas, and 10 20% by roasted barley tea. The removal effect from drinking water contaminated with both lead and cadmium was lower than that from water contaminated singly with lead or cadmium. It appears that tea components and filter membrane compete toward the adsorption of two heavy metals. Among the extraction conditions of raw tea materials at 70℃, 2 minutes and 95℃ , 10 minutes, the removal ratios of heavy metals were similar.
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