| 锰砂催化氧化Fe(Ⅱ)为Fe(Ⅲ)的研究 |
| 摘要点击 710 全文点击 1254 投稿时间：1995-02-09 |
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| 中文关键词 亚铁氧化 催化氧化剂 氧比速率 锰砂 |
| 英文关键词 ferrous oxidation oxidizer catslytical oxidation rate pyrolusite tailing |
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| 中文摘要 |
| 探讨了锰砂催化氧化亚铁反应的动力学特征及其反应机理。结果表明,锰砂作催比氧化剂,亚铁氧化反应速率可达309g/(L·h),80%以上的亚铁在反应初的15min内被除去。每g锰砂的饱和氧化亚铁量达到0.49—0.73g。锰砂和铁盐溶液分别用X衍射和X荧光方法鉴定和等离子发射光谱法分析,表明亚铁氧化后,锰砂晶体结构被溶蚀破坏,大部分锰被还原进入液相。少部分锰及其它元素进入沉积物。 |
| 英文摘要 |
| Pyrolusite tailings containing more than 32% of β-MnO2 were found to be a catalytical oxidizer for the oxidation of Fe (Ⅱ) to produce ferric solution. The kinetic characteristics and mechanism of Fe (Ⅱ) oxidation reaction catalyzed by pyrolusite tailings were studied. It was found that the Fe (Ⅱ) oxidation reaction proceeded at an extremely fast rate of 309 g/(L·h) and more than 80% of Fe(Ⅱ) were removed within the first 15 minutes of the Fe(Ⅱ) oxidation reaction. There was a saturated oxidation value of up to 0.49—0.73 g of Fe(Ⅱ) per gram of pyrolusite tailings,depending on the content of MnO2 in the pyro-lusite tailings. The pyrolusite tailings and the resulting ferric solution were analyzed with the Xiay diffraction X-ray fluorescent spectrometry method and ICP,respectively. The results show that after the Fe(Ⅱ) oxidatinn the pyrolusite tailings were corroded so that most of manganese species were reduced and entered into the liquid phase,and the remaining manganese and other elements entered into the sediment. |
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