| 硫氰酸根及其复杂体系的辐照降解研究 |
| 摘要点击 1843 全文点击 1657 投稿时间：2007-12-25 修订日期：2008-04-12 |
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| 中文关键词 γ射线 SCN- 辐照 降解 CN- 铜氰 复杂体系 |
| 英文关键词 γ-ray SCN- radiolysis degradation CN- copper(Ⅰ) cyanide complicated system |
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| 中文摘要 |
| 研究了硫氰酸根及其复杂体系60Ｃo源γ射线辐照降解的情况，分别探讨了在自由基清除剂存在下硫氰酸根的降解，硫氰酸根辐照后氰的浓度，氰、硫氰复杂体系和氰、铜氰及硫氰酸根的复杂体系的辐照降解情况.结果表明，在自由基清除剂NaHCO3和正丁醇存在的情况下硫氰酸根的降解受到影响，发现硫氰酸根在辐照的过程中有氰根的产生，可能的辐解方程为：SCN-＋8·OH→SO2-4＋CN-＋4H2Ｏ，在氰、硫氰酸根复杂体系中硫氰的降解率只有30％左右，而游离氰的降解受硫氰影响较小，在氰、铜氰和硫氰酸根复杂体系中，由于竞争反应，硫氰酸根难以完全降解，氰能较快被降解，而铜氰则由于其强络合能力而在溶液中主要组成是Cu(CN)2-3，使得总氰的降解只能达80％左右,不能较完全降解. |
| 英文摘要 |
| We studied the 60Ｃo γ-ray radiolysis of thiocyanate aqueous solutions in the presence of free radical scavengers,determination of cyanide of radiated thiocyanate solutions, degradation of cyanide and thiocyanate complicated system and cyanide、thiocyanate and copper(Ⅰ) cyanide complicated system. The presence of NaHCO3and n-butanol made the degradation efficiency of thiocyanate decreased, in the radiation procession of thiocyanate, cyanide was produced; and the possible reaction equation is SCN-＋8·OH→SO2-4＋CN-＋4H2Ｏ,in the cyanide and thiocyanate system,the thiocyanate degradation rate can obtained 30%, free cyanide degradation was little effected by coexistence of thiocyanate; and due to strong complex ability of copper(Ⅰ), the main form of copper(Ⅰ) cyanide is Cu(CN)2-3, the total cyanide of the system can't be degraded completely and degradation rate is about 80%. |
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