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Study on Removal of Toxic Metal Ions by Platycarya Strobilacea Tannin

Wang Qing-meil Xiao Wei-hong You Xiu-li (1.Institute of Jiangxi Environment Science and Protection,Nanchang 330006 2.Jiangxi Key Laboratory of Functional Organic molecules Nanchang 330013)  
The authors of this articie find out that platycarya strobilacea tannin can effectively eliminate toxic metal ions such as Cr 6+ ,Cu 2+ ,Fe 3+ ,Fe 2+ in water by chelation, and main factors affecting chelation reaction are quantity of platycarya strobilacea tannin added,time of quiescent settling and PH value of reaction system,in which the quantity has remarkable effect.Percentage of removal of the ions can reach 65%-90%.
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