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《Journal of Northeastern University(Natural Science)》 2001-05
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A Study of the Removal of Cd(Ⅱ) in Wastewater with Chitosan as Flocculation

ZHANG Ting an, YANG Huan, ZHAO Nai ren, ZHANG Guo yue (School of Materials & Metallurgy,Northeastern University,Shenyang 110004,China)  
The method of removal Cd(Ⅱ) from wastewater using chitosan with electrolysis of Na 2SO 4 as flocculants was described.The effects of pH, ion concentration of Cd(Ⅱ), concentration of chitosan as a flocculants on the removal rate of Cd(Ⅱ) were investigated respectively. When the ion concentration of Cd(Ⅱ) is not more than 40?mg/L, pH is 8~8.5 and the concentration of chitosan is 1%, the removal rate of Cd(Ⅱ) is higher than 99 95%. At the same condition the removal rate of Cd(Ⅱ) in waste water from a smelter is higher than 99 7%, the remainder ion concentrations of the other ions of Cu, Zn, and Pb in the wastewater are 0 053, 0.58 and 0 01?mg/L, which are less than the drainage standard fixed by P.R.China.The flocculation mechanism of chitosan to Cd(Ⅱ) was analyzed also.
【Fund】: 原冶金工业部优秀青年基金资助项目 ( 9312 0 14 0 4) ·
【CateGory Index】: X703
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