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- W2389176576 abstract "The redox rule of arsenic in copper electrolyte and its valence transformation method were studied by means of chemical analysis and electrochemical test in the acid solution containing H 2 SO 4 ,As,Sb and Bi. The results show that the air (O 2) dissolved in copper electrolytes can effectively oxidize arsenic,and Sb can accelerate the oxidation of arsenic. The valence of As 5 + can be transformed to As 3 + by adding a proper amount of SO 2 into the electrolyte,which accelerates the co-precipitation reactions among arsenic,antimony and bismuth. The removal rates of Sb and Bi reach 60. 0% and 46. 0% ,respectively under a certain condition after the arsenic mol ratio of As 3 +/As 5 + is adjusted to 1∶ 1 approximately by SO 2 . Electrochemical test results show the As 3 + cathode process appears a new reduction peak at the potential of - 0. 1 V to - 0. 2 V,and the peak potential shifts negatively with the increase of As 3 + ion concentration. The oxidation and reduction peaks appear near the potential of - 0. 01 V and - 0. 18 V,respectively in the anodic and cathode process of As 5 + ion. With the increase of As 5 + ion concentration,the oxidation peak current gradually increases. The reduction peak potential shifts towards negative direction and the peak current increases first and then decreases." @default.
- W2389176576 created "2016-06-24" @default.
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- W2389176576 date "2013-01-01" @default.
- W2389176576 modified "2023-09-23" @default.
- W2389176576 title "Redox Rule of Arsenic in Copper Electrolyte and Its Valence Transformation Method" @default.
- W2389176576 hasPublicationYear "2013" @default.
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