Removing cadmium from electroplating wastewater by waste saccharomyces cerevisiae

The appropriate condition and scheme of removing cadmium from electroplating wastewater were investigated by adsorption-precipitation method using waste saccharomyces cerevisiae（WSC） as sorbent. Effect factors on biosorption of cadmium in cadmium-containing electroplating wastewater by waste sacchar...

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Published in:Transactions of Nonferrous Metals Society of China 2008-08, Vol.18 (4), p.1008-1013
Main Author: 代淑娟 魏德洲 周东琴 贾春云 王玉娟 刘文刚
Format: Article
Language:English
Subjects:
cadmium biosorption
electroplating wastewater
waste saccharomyces cerevisiae
废水处理
生物吸附
电镀废水
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Summary:The appropriate condition and scheme of removing cadmium from electroplating wastewater were investigated by adsorption-precipitation method using waste saccharomyces cerevisiae（WSC） as sorbent. Effect factors on biosorption of cadmium in cadmium-containing electroplating wastewater by waste saccharomyces cerevisiae and precipitation process of waste saccharomyces cerevisiae after adsorbing cadmium were studied. The results show that removal rate of cadmium is over 88% after 30 min adsorbing under the condition of cadmium concentration 26 mg/L, the dosage of waste saccharomyces cerevisiae 16.25 g/L, temperature 18℃, pH 6.0 and precipitation time 4 h. Biosorption-precipitation method is effective to remove cadmium in cadmium-containing electroplating wastewater by waste saccharomyces cerevisiae. The SEM, infrared spectroscopy and Zeta-potential of the cells show that chemical chelating is the main adsorption form; electrostatic attraction, hydrogen bonding and van der Waals force all function in adsorption process; and -NH2-,-C=O-,-C=O-NH-,-CH3, -OH are the main adsorption groups.
ISSN:1003-6326
DOI:10.1016/S1003-6326(08)60173-9