| 用王水分解含金矿物的机理探讨 |
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| 引用本文： | 王占国.用王水分解含金矿物的机理探讨[J].铀矿地质,1989,5(5):311-316. |
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| 作者姓名： | 王占国 |
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| 作者单位： | 不详 |
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| 摘 要： | 本文从理论上对王水分解含金矿物的机理进行了探讨。在非标准状态下,温度、压力不变,改变体系中物质的浓度、酸度条件,用能斯特公式求解体系中HNO_3和Au的电极电位值,而后用EMF(电池电动势)根据规则判断反应是否可以进行。经理论计算,结论是可行的。另外由于Au~(3 )和Cl~-大量存在时,生成稳定的AuCl_4]~-,经过络合作用,促使了HNO_3和Au的氧化还原反应,最终使含金矿物溶解完全。作者认为王水同含金矿物反应的机理是:氧化和络合的双重作用。
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| 关 键 词： | 电极电位 能斯特公式EMF(电池电动势) |
A DISCUSSION ON THE MECHANISM OF DECOMPOSITION OF GOLD-BEARING ORES WITH AQUA REGIA |
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| Wang Zhanguo.A DISCUSSION ON THE MECHANISM OF DECOMPOSITION OF GOLD-BEARING ORES WITH AQUA REGIA[J].Uranium Geology,1989,5(5):311-316. |
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| Authors: | Wang Zhanguo |
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| Institution: | Wang Zhanguo |
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| Abstract: | A theoretical study of the mechanism of gold-bearing ores with aqua regia is discussed in this paper. Under the condition of non-standard state, and unchanged constant temperature and pressure, values of the electrode potentical of HNO_3 and Au are obtained according to the Nernst formula by changing concentration of reactants and pH of the system. And then possibilities of the reaction are determined by EMF (electromotive force of battery) . By theoretical calculation our conclusion is positive. In addition, formation of a stable complex (AuCl_4)~- in the presence of large amounts of Au~(3 ) and Cl~- accelerate the oxidation-reduction between HNO_3 and Au by complexation, which finally leads to a completely decomposition of gold-bearing ores. The mechanism of the reaction of gold-bearing ores with aqua regia proposed by the author is both oxidation and complexation. |
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| Keywords: | Electrode potential Nernst formula EMF (electromotive force of battery) |
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