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《Industrial Water Treatment》 2008-04
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Application of wavelet packets analysis-Elman neural network to simultaneous determination of iron,nickle and copper in wastewater

Shen Mingjin (Department of Chemistry, North Sichuan Medical College, Nanchong 637000,China)  
The method of simultaneous determination of Fe(Ⅲ),Ni(Ⅱ)and Cu(Ⅱ)in wastewater by wavelet packets analysis-simple recurrent neural network spectrophotometry with 5-Br-PADAP as colorizing agent in the presence of nonionic surfactant OP to increase its solubility and sensibility has been established. The noise in the visible spectrum can be eliminated by wavelet packets analysis and the data are analyzed by Elman neural network. The proposed method has been applied to the determination of Fe(Ⅲ),Ni(Ⅱ)and Cu(Ⅱ)in simulated and true wastewater respectively with satisfactory results. The recovery rates of Fe(Ⅲ), Ni(Ⅱ)and Cu(Ⅱ)ranged from 97.5%-102.5%.
【CateGory Index】: X832
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