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| 氮源对氧化亚铁硫杆菌浸提废旧印刷线路板覆层铜的影响研究 |
| Effect of Nitrogen Sources on Copper Recovery from Waste Printed Circuit Boards by Thiobacillus ferrooxidans |
| 投稿时间：2013-04-20 修订日期：2013-07-03 |
| DOI： |
| 中文关键词: 氧化亚铁硫杆菌;废旧印刷线路板;铜;氮源 |
| 英文关键词: Thiobacillus ferrooxidans;waste printed circuit board;cooper;nitrogen source |
| 基金项目:国家自然科学基金(21177101),教育部科学技术研究重点项目(211165)和四川省科技厅项目(11zs2008)资助。 |
| 作者 | 单位 | | 谌书, 杨远坤, 廖广丹, 陈梦君, 董发勤 | 西南科技大学固体废物处理与资源化教育部重点实验室, 四川绵阳 621010 |
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| 中文摘要: |
| 采用摇瓶实验,在170 rpm、30℃下,以氧化亚铁硫杆菌(Thiobacillus ferrooxidans) SW-02为浸提菌株,研究氮源对氧化亚铁硫杆菌浸提废旧印刷线路板覆层铜的影响。分析发现,以(NH4)2SO4作为氮源含量为1 g/L时,浸提84 h后铜浓度达到2.73 g/L,铜的浸出效率较好。而采用(NH4)2HPO4作为氮源替代(NH4)2SO4,(NH4)2HPO4加入量在1g/L时效果较好,浸提84 h后铜浓度达到3.52 g/L。当(NH4)2HPO4在2 g/L及以上时,会抑制细菌生长,导致浸出效率降低。实验结果表明,以(NH4)2HPO4作为氧化亚铁硫杆菌生长所需氮源,其浸出废旧印刷线路板覆层铜的效果优于(NH4)2SO4,最佳含量为1 g/L。 |
| 英文摘要: |
| Effect of nitrogen sources on copper recovery from waste printed circuit boards by Thiobacillus ferrooxidans was investigated at 30℃ and a shaker rotary speed of 170 rpm. The results showed that when (NH4)2SO4 was used as nitrogen source, the concentrations of Cu leached into the aqueous phase after a 84-hour leaching process reached 2.73 g/L which could increase to 3.52 g/L when the nitrogen source changed to (NH4)2HPO4. While the growth of bacteria was inhibited and led to low copper recovery when the concentrations of (NH4)2HPO4 were above 2 g/L. It is concluded that (NH4)2HPO4 is a better nitrogen source than (NH4)2SO4 in leaching of copper from waste printed circuit boards by T. ferrooxidans, and the optimal concentrations of (NH4)2HPO4 are 1 g/L. |
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