| 超声波辅助浸取分离污泥中的重金属 |
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| 引用本文： | 吴阳东,张嫔,黄智源.超声波辅助浸取分离污泥中的重金属[J].环境科学与技术,2013(4):109-113. |
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| 作者姓名： | 吴阳东 张嫔 黄智源 |
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| 作者单位： | 广州科城环保科技有限公司;华南理工大学化学与化工学院 |
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| 摘 要： | 以实验室合成的含重金属离子的污泥为研究对象,通过实验分析对比了不同pH下超声波对污泥中重金属离子去除率的影响。研究表明,在超声波的辅助作用下,一步酸浸法能使Cu-Fe混合污泥中的Cu和Fe完全分离,Cu和Fe的离子浸出率分别是97.47%和1.81%;超声波辅助两步酸浸法分离Cu-Cr污泥中的Cu和Cr,96.52%的Cu溶解在浸出液中,96.64%的Cr保留在浸出渣中,Cu、Cr可完全分离;在Cr-Fe混合污泥中,超声的辅助作用使两步酸浸后Cr的浸出率达97.05%,浸出渣中则含98.48%的Fe,2种金属得到有效的分离。酸浸过程中加入超声波对重金属的分离回收有明显的强化效果。
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| 关 键 词： | 超声波 辅助 污泥 分离 处理 |
Separation of Heavy Metals from Sludge by Ultrasound-Assisted Acid Leaching |
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| WU Yang-dong,ZHANG Pin,HUANG Zhi-yuan.Separation of Heavy Metals from Sludge by Ultrasound-Assisted Acid Leaching[J].Environmental Science and Technology,2013(4):109-113. |
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| Authors: | WU Yang-dong ZHANG Pin HUANG Zhi-yuan |
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| Institution: | 1 (1.Cosmo Environmental Technology Co.Ltd.,Guangzhou 510535,China;2.School of Chemistry and Chemical Engineering,South China University of Technology,Guangzhou 510640,China) |
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| Abstract: | Experiments of ultrasound-assisted acid leaching for removing heavy metal from lab-prepared synthesized metalbearing sludge were conducted focusing on impacts of ultrasound on the heavy metal removal rate with varied pH values.For the Cu-Fe containing sludge,the one-stage acid leaching enhanced by ultrasound could separate Fe and Cu,the leaching rate of Cu and Fe being 97.47%,1.81%respectively.Also ultrasound-assisted acid leaching of Cu-Cr bearing sludge and CrFe bearing sludge were studied.It was proved that ultrasound could effectively strengthen acid leaching of heavy metals from sludge. |
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| Keywords: | ultrasound assisted sludge separation treatment |
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